In an experiment, zinc chlorate decomposed according to the following chemical equation. Zn(ClO3)2 → ZnCl2 + O2 (Molar mass of Zn(ClO3)2 = 232.29 g/mol; ZnCl2 = 136.286 g/mol; O2 = 31.998 g/mol) If the mass of zinc chlorate was 150 grams, which of the following calculations can be used to determine the mass of oxygen gas formed?

Answers

Answer 1

The mass of oxygen gas : = 61.98 g

Further explanation

Given

Reaction

Zn(ClO3)2 → ZnCl2 + O2

The mass of zinc chlorate was 150 grams

Required

The mass of oxygen gas

Solution

Balanced equation :

Zn(ClO₃)₂ → ZnCl₂ + 3O₂

mol of Zn(ClO₃)₂ :

= mass : MW

= 150 : 232.29 g/mol

= 0.6457

From equation, mol ratio of Zn(ClO₃)₂ → ZnCl₂ : O₂ = 1 : 3, so mol O₂ :

= 3/1 x mol  Zn(ClO₃)₂

= 3/1 x 0.6457

= 1.937

Mass of  O₂ :

= mol x MW

= 1.93  x 31.998 g/mol

= 61.98 g

Or we can use equation :

= (150 x 3 x 31.998) : (232.29 x 1) grams

= 14399.1 : 232.29

= 61.98 g

Answer 2

The number of moles of Zn(ClO₃)₂ was calculated as 150 g / 232.29 g/mol, substitute that value into the equation along with the molar mass of O₂ (31.998 g/mol) to find the mass of oxygen gas formed.

Given:

The mass of oxygen  = 61.98 g

The mass of zinc chlorate = 150 grams

The balanced reaction is:

Zn(ClO₃)₂ → ZnCl₂ + 3O₂

Mol of Zn(ClO₃)₂ :

Mass: MW

150: 232.29 g/mol

0.6457

From equation, mol ratio of Zn(ClO₃)₂ → ZnCl₂ : O₂ = 1 : 3, so mol O₂ :

= 3/1 x mol  Zn(ClO₃)₂

= 3/1 x 0.6457

= 1.937

Mass of  O₂ :

Mol x MW

=1.93  x 31.998 g/mol

= 61.98 g

= (150 x 3 x 31.998) : (232.29 x 1) grams

= 14399.1: 232.29

= 61.98 g

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Related Questions

Question 5 of 5
When planning space exploration, scientists face many
challenges. One issue is the weight of the items being
transported. They can use the engineering design process
to help minimize the weight of materials on board a
spacecraft.
You have designed a prototype of a new, lighter material. What should be the
next step in your process?
A. Update your initial design for the new type of material.
B. Test to see
whether your material is strong and works well.
C. Figure out what problems people want to solve.
D. Brainstorm new ways to design materials.

Answers

Answer:B

Explanation: got it right on test

Test to see whether your material is strong and works well  should be the next step in your process. Therefore, the correct option is option B.

What is space exploration?

Space science and technology are used in space exploration to learn more about the universe. While astronomers use telescopes to explore the universe, both unmanned robotic space missions and human spaceflight also participate in the physical exploration of space.

When planning space exploration, scientists face many challenges. One issue is the weight of the items being transported. They can use the engineering design process to help minimize the weight of materials on board a spacecraft.  You have designed a prototype of a new, lighter material. Test to see whether your material is strong and works well  should be the next step in your process.

Therefore, the correct option is option B.

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The chemical equation shown below represents a reaction that produces fuel for certain cars. CO + H2O - CO, + H2 Which substance represented in this equation is classified as an element? F CO GH, нсо, J H2 F b G OOOO C. H 1​

Answers

Answer:

The equation to this question is unclear. The equation is as follows:

CO + H2O ---> CO2 + H2

The substance classified as an element is H2.

Explanation:

An element is a substance composed of atoms of the same type. It is the simplest chemical substances that cannot be broken down by any chemical reaction. According to this question showing a chemical equation that produces fuel for certain cars:

CO + H2O ---> CO2 + H2

H2 is the substance that represents an element because it is made up of two atoms of hydrogen to form a molecule. Other substances in the reaction like (CO, CO2, H2O) are made up of two or more different atoms, hence, they are compounds not elements.

The substance represented in the given chemical equation which is classified as an element is: J. \(H_2\)

An element can be defined as a pure substance which comprises atoms with the same atomic number (number of protons) in its atomic nuclei.

Basically, an element is any pure substance that can't be broken down, decomposed or transformed into simpler substances by chemical or physical means.

In Chemistry, some examples of an element include the following:

Carbon.Argon.Sodium.Oxygen.Hydrogen.

                                  \(CO + H2O --> CO_2 + H_2\)

From the above chemical equation, the substance which is classified as an element is hydrogen (\(H_2\)).

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Determine the products of the reaction between tin(ii) oxalate and lithium chloride

Answers

The reaction between tin (II) oxalate and lithium chloride is that it forms tin (II) chloride and lithium oxalate, which are the products of the reaction. The balanced chemical equation for the reaction is  SnC₂O₄ + 2 LiCl → SnCl₂ + Li₂C₂O4.

Tin (II) oxalate reacts with lithium chloride to form a precipitate of tin (II) chloride and lithium oxalate. The reaction between tin (II) oxalate and lithium chloride is given below.

SnC₂O₄ + 2 LiCl → SnCl₂ + Li₂C₂O4

The balanced chemical equation for the reaction is as follows:

SnC₂O₄ + 2 LiCl → SnCl₂ + Li₂C₂O4 .

SnC₂O₄ is tin (II) oxalate, while LiCl is lithium chloride.

SnCl₂ is tin (II) chloride, while Li₂C₂O4 is lithium oxalate.The products of the reaction between tin (II) oxalate and lithium chloride are tin (II) chloride and lithium oxalate. Tin (II) chloride is a white crystalline powder that is soluble in water, whereas lithium oxalate is a white solid that is insoluble in water.The reaction between tin (II) oxalate and lithium chloride is a double displacement reaction, which is also known as a metathesis reaction. When a double displacement reaction takes place, two compounds exchange their cations and anions, resulting in the formation of two new compounds.

The reaction is a double displacement reaction or metathesis reaction where two compounds exchange their cations and anions to form two new compounds.

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Which of these demonstrates one of Newton's Laws of Motion? A seat belt holds you in your seat kicking a bowling ball will affect you more than the ball a fireman is knocked backward when he turns on his hose all three are examples of Newton's Laws

Answers

Answer:

the last one: all three are examples of Newton's laws

Explanation:

i guess

What gaseous material is primarily extruded from a hydrothermal vent? Carbon Monoxide Hydrogen Sulfide Nitrogen Helium none of the above

Answers

Answer:The gaseous material primarily extruded from a hydrothermal vent is primarily Hydrogen Sulfide (H2S).

Explanation:

Hydrothermal vents are underwater geothermal systems that occur on the ocean floor. They are formed when seawater seeps into the Earth's crust, gets heated by volcanic activity, and then rises back to the surface. These vents are often found near tectonic plate boundaries, such as mid-ocean ridges.

The primary gaseous material extruded from hydrothermal vents is hydrogen sulfide (H2S). Hydrogen sulfide is a colorless and highly toxic gas with a distinct rotten egg odor. It is produced as a result of chemical reactions that occur within the vent system.

At hydrothermal vents, seawater reacts with hot rocks and minerals in the Earth's crust. This process leads to the formation of various chemical compounds, including hydrogen sulfide. The hot, mineral-rich water released from the vents carries dissolved hydrogen sulfide gas along with other dissolved gases.

The release of hydrogen sulfide gas from hydrothermal vents has significant ecological implications. It serves as an energy source for specialized bacteria that thrive in these extreme conditions. These bacteria, known as chemosynthetic bacteria, use the hydrogen sulfide as an energy source to convert it into organic matter through a process called chemosynthesis. This chemosynthetic activity forms the basis of unique ecosystems around hydrothermal vents, supporting diverse communities of organisms.

While other gases may also be present in lower concentrations, hydrogen sulfide is the primary gaseous material extruded from hydrothermal vents due to its abundance and importance in supporting the unique ecosystems that exist in these extreme environments.

The gaseous material primarily extruded from a hydrothermal vent is hydrogen sulfide (H2S).

High amounts of hydrogen sulphide gas, as well as other gases including carbon dioxide (CO2) and methane (CH4), are known to be released from hydrothermal vents.

The habitats and microbial communities that are found surrounding hydrothermal vents are unique because of the chemical composition and conditions that these gases contribute to. So hydrogen sulphide is the right response.

A seafloor fissure known as a hydrothermal vent is where hot, mineral-rich fluids are released into the surrounding water. Typically at mid-ocean ridges or in regions where tectonic plates are sliding apart, these vents are found in volcanically active regions.

Magma that exists beneath the surface of the Earth heats the fluids that are emitted by hydrothermal vents. When seawater seeps into fissures and fractures, it heats up and reacts with the nearby rocks, leaching away different minerals and metals in the process.

Hot, mineral-rich fluids are released via the vent apertures when the superheated water hits the seafloor.

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Modeling Energy Changes
Student Guide

Answer in a copy and paste format, or using photos of what was said please.
Anyone who can do this will receive brainliest ofc!

Modeling Energy ChangesStudent GuideAnswer in a copy and paste format, or using photos of what was said
Modeling Energy ChangesStudent GuideAnswer in a copy and paste format, or using photos of what was said
Modeling Energy ChangesStudent GuideAnswer in a copy and paste format, or using photos of what was said
Modeling Energy ChangesStudent GuideAnswer in a copy and paste format, or using photos of what was said
Modeling Energy ChangesStudent GuideAnswer in a copy and paste format, or using photos of what was said

Answers

In terms of the energy change in the reaction, the negative value indicates that the reaction is exothermic as the reaction releases 1560.74 kJ of energy for every mole of C2H6 that reacts with 7/2 moles of O2.

What is a model of chemical energy changes?

The model of chemical energy changes is given below:

Balanced chemical equation:

C2H6 + 7/2 O2 → 2CO2 + 3H2O

Now, to calculate the energy change in the reaction, we will use a table of enthalpy values. The enthalpy change for each of the reactants and products is given in the table below:

Reactants:

C2H6: -84.68 kJ/mol

O2: 0 kJ/mol

Products:

CO2: -393.51 kJ/mol

H2O: -285.83 kJ/mol

The energy change in the reaction can be calculated using the formula:

ΔH = ∑(products) - ∑(reactants)

ΔH = [2(-393.51 kJ/mol) + 3(-285.83 kJ/mol)] - [-84.68 kJ/mol + 7/2(0 kJ/mol)]

ΔH = -1560.74 kJ/mol

Therefore, the energy change in the reaction is -1560.74 kJ/mol.

To create a model of the energy change in the reaction, we can use an energy level diagram. In this diagram, the energy of the reactants is shown on the left, the energy of the products is shown on the right, and the activation energy is shown as a barrier between them.

The energy level diagram for this reaction is shown below:

Reactants (C2H6 + 7/2 O2)

                |

                |

       Activation energy

                |

                |

Products (2CO2 + 3H2O)

As shown in the diagram, the reactants have a higher energy level than the products, and the activation energy is required to get the reaction started.

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determine what happens in this reaction, if chlorine is the more electronegative element: s cl2 ---> scl2

Answers

In the given reaction, if chlorine is the more electronegative element, the formation of the compound SCl2 (sulfur dichloride) would occur.

Electronegativity is a measure of an element's ability to attract electrons towards itself in a chemical bond. Chlorine is more electronegative than sulfur, which means it has a stronger pull on electrons. In the reaction, the chlorine molecule (Cl2) would react with sulfur (S) to form sulfur dichloride (SCl2). The more electronegative chlorine atoms would attract the bonding electrons closer to themselves, resulting in a polar covalent bond. This means that there would be partial positive charge on the sulfur atom and partial negative charges on the chlorine atoms in the SCl2 molecule. The reaction can be represented as:S + Cl2 → SCl2. Overall, when chlorine is the more electronegative element, sulfur dichloride (SCl2) would form as a result of the reaction between sulfur and chlorine.

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how is an electron orbital similar to a parabola?

Answers

Answer:

Explained below.

Explanation:

First of all, the orbital path of electron is mostly parabolic in electric field.

In an electric field, electrons behave very similar to a projectile. Thus, Electrons have a parabolic path in an electric field simply because the speed of the electrons in a direction which is perpendicular to the electric field is constant since there is no force. Therefore, there will be no acceleration along that perpendicular direction. However there will be an acceleration that is constant in the direction of the electric field which makes it act in a similar manner to a projectile under gravity.

helpppp??? How many moles are present in 32.3 grams of carbon dioxide (CO2)?

Answers

mole is equal to 1 moles Carbon Dioxide, or 44.0095 grams. :)

which alkyl halide would you expect to react most slowly when heated in aqueous solution?
(I) (CH3)3C-f
(II) (CH3)3C-CI
(III) (CH3)3C-Br
(IV) all of these would react at the same rate
A. I
B. II
C. III
D, V

Answers

The correct answer is C. III, (CH3)3C-Br.

When alkyl halides are heated in aqueous solutions, they can undergo an elimination reaction in which the halogen atom is eliminated along with a proton from the adjacent carbon atom. The rate of this reaction depends on several factors, including the strength of the C-H bond and the strength of the C-X bond (where X is the halogen atom).

In general, the rate of elimination reactions increases as the size of the halogen atom decreases. This is because smaller halogens such as fluorine and chlorine have stronger C-X bonds than larger halogens such as bromine and iodine. Therefore, the alkyl halide with the weakest C-Br bond, (CH3)3C-Br, would be expected to react most slowly when heated in aqueous solution compared to (CH3)3C-F and (CH3)3C-Cl.

Additionally, the (CH3)3C-F and (CH3)3C-Cl alkyl halides have strong C-H bonds due to the electronegativity of fluorine and chlorine, respectively, which makes them less likely to undergo elimination reactions compared to (CH3)3C-Br.

Therefore, the correct answer is C. III, (CH3)3C-Br, which would react most slowly when heated in aqueous solution.

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Which object has the most potential energy? A ball resting on the ground. A ball being thrown at 100 miles per hour. A ball on top of a refrigerator. A ball resting on the edge of a cliff.

Answers

Answer:

The correct option is a ball resting on the edge of a cliff.

Explanation:

A ball resting on the edge of a cliff is the correct option because it has the most potential energy and this is because potential energy is the energy stored by an object or energy posses by an object due it is position. It is the energy at rest.

A ball resting on the edge of a cliff indicate that the ball is a t rest, and it's possess energy base on its position relative to it's zero position.

Answer:A ball resting on the edge of a cliff.

Explanation:

How many orbitals in an atom can have the designation 5p,3dz^2,4d,n=5,n=4?Please explain with quantum numbers.

Answers

The total number of orbitals with designations 5p, 3dz2, 4d, n=5, and n=4 are 13 orbitals.

To determine the orbitals in an atom, the quantum numbers n, l, ml, and ms are used. The n quantum number is the principal quantum number, which determines the energy level of the electron. The l quantum number is the angular momentum quantum number, which determines the shape of the orbital.

The ml quantum number is the magnetic quantum number, which determines the orientation of the orbital. The ms quantum number is the spin quantum number, which determines the direction of the electron spin. Therefore, using the quantum numbers for the orbitals with the designations 5p, 3dz2, and 4d, and the two values of n, 5 and 4, it is possible to determine the number of orbitals.

The 5p subshell has three orbitals, the 3dz2 subshell has five orbitals, and the 4d subshell has five orbitals. There are five subshells for n=5 (s, p, d, f, g), and five orbitals in the 4d subshell for n=4. Thus, the total number of orbitals that can have these designations is 13.

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what are the four nitrogenous bases & how are they related?

Answers

Nitrogenous bases refer to the building blocks of DNA and RNA molecules. They are molecules that contain nitrogen and other elements. Four nitrogenous bases are found in DNA: adenine (A), guanine (G), cytosine (C), and thymine (T).These bases are divided into two categories: purines and pyrimidines.

Purines include adenine (A) and guanine (G), which are two-ringed structures. Pyrimidines include thymine (T) and cytosine (C), which are one-ringed structures. Purines always pair with pyrimidines in DNA, resulting in a consistent diameter for the DNA helix.Nitrogenous bases play a crucial role in encoding genetic information because they are responsible for holding the information in the DNA molecule. They can bind to one another via hydrogen bonding. The number of hydrogen bonds between base pairs determines their strength, which is essential in DNA replication and protein synthesis. For example, the pairing of guanine with cytosine is stronger than the pairing of adenine with thymine. Adenine pairs with thymine, while guanine pairs with cytosine, resulting in complementary base pairing.A single strand of DNA contains four types of nitrogenous bases, and each base has a complementary base. A strand of DNA is always composed of nucleotides, which are made up of a phosphate group, a sugar, and a nitrogenous base. Therefore, the four nitrogenous bases are essential building blocks of DNA molecules.

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How do we solve this? I got B but answer key says A

How do we solve this? I got B but answer key says A

Answers

The concentration of NH3 at equillibirium is 0.00010M. Option A.

Ammonium nitrate is formed when nitric acid reacts with ammonia. It is a white crystalline solid consisting of ammonium ions and nitrate ions. Soluble in water, but does not form hydrates. Ammonia is directly neutralized with sulfuric acid to produce ammonium sulfate.

The neutralization evaporator and crystallizer are connected so that the heat released during neutralization is used to evaporate the water in the ammonium sulfate slurry. These units operate under partial vacuum. Nitric acid pH neutralization is common and any inorganic base such as sodium hydroxide or lime can be used. Ammonia gas reacts with hydrogen chloride gas to form ammonium chloride.

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A chemistry student weighs outof phosphoric acid, a triprotic acid, into avolumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid withsolution.
Calculate the volume ofsolution the student will need to add to reach the final equivalence point. Round your answer tosignificant digits.

Answers

To calculate the volume of solution needed to reach the equivalence point, we need to know the concentration of the phosphoric acid solution in the volumetric flask. Let's assume that the student weighed out 0.1 moles of phosphoric acid and dissolved it in a 250 mL volumetric flask, resulting in a concentration of 0.4 M (0.1 moles / 0.25 L).

Since phosphoric acid is a triprotic acid, it can donate up to three protons (H+ ions) in a reaction. To fully titrate the acid, we need to add three equivalents of a solution that can accept these protons. Let's assume the solution used for titration is sodium hydroxide (NaOH), which can accept one proton per molecule.

The balanced chemical equation for the reaction between phosphoric acid and sodium hydroxide is:

H3PO4 + 3 NaOH → Na3PO4 + 3 H2O

From the equation, we can see that for every mole of phosphoric acid, we need three moles of NaOH to reach the equivalence point.

Therefore, the number of moles of NaOH needed to titrate the 0.1 moles of phosphoric acid is:

0.1 moles H3PO4 x 3 moles NaOH / 1 mole H3PO4 = 0.3 moles NaOH

To calculate the volume of 0.3 M NaOH solution needed to provide 0.3 moles of NaOH, we can use the formula:

moles = concentration x volume

Rearranging the formula, we get:

volume = moles / concentration

Plugging in the values, we get:

volume = 0.3 moles / 0.3 M = 1 L

Therefore, the chemistry student will need to add 1 liter (or 1000 mL) of 0.3 M NaOH solution to the phosphoric acid solution in the volumetric flask to reach the equivalence point.

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Determine the temperature of 2.49 moles of gas in a 1.0-L vessel at 143
kPa. R=8.31 kPa*L/(mol*K) Round your answer to 2 sig figs. *​

Answers

Answer:

Temperature = 6.91K

Explanation:

Temperature = T

Number of Moles = 2.49moles

Volume = 1.0L

Pressure = 143kPa

R = 8.31kPa*L/mol.K

From ideal gas equation,

PV = nRT

P = pressure of the ideal gas

V = volume which the gas occupies

n = number of moles of the gas

R = ideal gas constant

T = temperature of the ideal gas

PV = nRT

T = PV / nR

T = (143 * 1) / (2.49 * 8.31)

T = 143 / 20.6919

T = 6.91K

The temperature of the gas is 6.91K

PLEASE HELP ME!!!!! ILL GIVE BRAINLIEST

PLEASE HELP ME!!!!! ILL GIVE BRAINLIEST

Answers

It would be the same

Calculate the wavelength (in nm) of light with a frequency of 5.98 x 1014 s 1. What is the energy of a photon of light that has a frequency of 9.89 x 1013 Hz?

Answers

The wavelength of the light is approximately 500 nm. The energy of the photon of light is approximately 6.56 x 10-20 J.

Answer: Question 1:The formula relating wavelength, frequency, and the speed of light is given by:c = fλHere,λ = wavelength, f = frequency, c = speed of lightI. n the problem, frequency is given as 5.98 x 1014 s-1. Therefore, using the formula, the wavelength of light can be calculated as follows:λ = c/f= (3 x 108 m/s)/(5.98 x 1014 s-1)≈ 500 nm

Therefore, the wavelength of the light is approximately 500 nm.

Question 2:The formula relating energy and frequency of light is given by:E = hfwhereE = energy of photonh = Planck's constant = 6.626 x 10-34 J s (Joule seconds)f = frequency of lightIn the problem, the frequency of light is given as 9.89 x 1013 Hz. Therefore, using the formula, the energy of the photon of light can be calculated as follows:E = hf= (6.626 x 10-34 J s) x (9.89 x 1013 Hz)≈ 6.56 x 10-20 J

Therefore, the energy of the photon of light is approximately 6.56 x 10-20 J.

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what are the factors affecting gravity?​

Answers

Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:

Mass: The most significant factor affecting gravity is the mass of the objects involved. According to Newton's law of universal gravitation, the gravitational force between two objects is directly proportional to the product of their masses. Greater mass leads to a stronger gravitational force.Distance: The distance between two objects also plays a crucial role in the strength of gravity. According to the inverse square law, the gravitational force decreases as the distance between objects increases. As objects move farther apart, the gravitational attraction between them weakens.Gravitational Constant: The gravitational constant, denoted by G, is a fundamental constant in physics that determines the strength of the gravitational force. It is a universal constant and does not change, affecting the overall magnitude of gravity.Shape and Distribution of Mass: The distribution of mass within an object can influence the gravitational field it generates. Objects with a more compact and concentrated mass distribution will have a stronger gravitational pull compared to those with a more spread-out mass distribution.External Influences: Gravity can be influenced by external factors such as nearby celestial bodies or the presence of other forces. For example, the gravitational interaction between the Earth and the Moon affects tides on Earth's surface.

A student found that her mixture was 15 % NH4Cl , 18 % NaCl , and 77 % SiO2 . Assuming her calculations are correct, what did she most likely do incorrectly in her experiment

Answers

The mistake made by the student during the experiment was to assume that the solution was homogeneous, but it was a mixture. The given statement shows the mixture was made up of 15% NH4Cl, 18% NaCl, and 77% SiO2.

There are two types of materials: pure substances and mixtures. A pure substance has a consistent and definite composition. A mixture is a physical combination of two or more substances that can be separated using physical means. Liquid solutions are the most common mixtures.

The most well-known liquid solutions are soda and saltwater. Homogeneous mixtures are mixtures that are uniform throughout. In other words, the composition is the same everywhere. However, heterogeneous mixtures are mixtures that are not uniform throughout. They don't have the same composition in all places. Saltwater is an example of a homogeneous mixture.

Likewise, the student likely made a mistake in assuming that the mixture was homogeneous when calculating the percentages of NH4Cl, NaCl, and SiO2. However, it's clear that the mixture is heterogeneous based on the fact that it contains several components.

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a compound with an empirical formula of ch is found to have a molar mass of 39.057 g/mol. what is the compound's molecular formula?

Answers

The molecular formula of the compound would be C2HCl having empirical formula ch.

What is empirical formula and what is molecular formula and it comes out to be C2HCl?The two terms we use to describe the organic relation between elements of the compounds and their ratios too.Empirical formula of a compound is the simplest whole number ratio of atoms present in a compound.Molecular formula is completely different from empirical formula in the context that it represents the molecule that uses chemical symbols indicating different types of atom.Here is given the molar mass 39.057 g/mol, considering the empirical formula to be (CH)x , we can find the molecular formula by multiplying the empirical formula.

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the reaction is exothermic in the forward direction. will an in- crease in temperature shift the position of the equi- librium toward reactants or products?

Answers

An increase in temperature will shift the position of the equilibrium toward the products.

In an exothermic reaction, heat is released as a product. According to Le Chatelier's principle, when a system at equilibrium is subjected to a change in temperature, it will shift in a direction that opposes the change. Since the reaction is already exothermic in the forward direction, an increase in temperature represents an external addition of heat. To counteract this increase in temperature, the equilibrium will shift in the endothermic direction, which is towards the products.

This shift helps to absorb the excess heat and restore equilibrium. Therefore, the increase in temperature will shift the position of the equilibrium toward the products.

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Obtener la fórmula empírica de un compuesto cuya composición centesimal reporta: Cr: 26,53 % , S: 24,52 % y O: 48,96%. Dato: m.A. [Cr= 52 , S= 32]

Answers

Respuesta:

Cr₂S₃O₁₂

Explicación:

Primer paso: Dividir el porcentaje en masa de cada elemento por su masa atómica

Cr: 26,53/52 = 0,510

S: 24,52/32 = 0,766

O: 48,96/16 = 3,06

Segundo paso: Dividir todos los números por el más pequeño (0,510)

Cr: 0,510/0,510 = 1

S: 0,766/0,510 = 1,5

O: 3,06/0,510 = 6

Tercer paso: Multiplicar todos los números por algún número que haga que todos sean enteros (2)

Cr: 1 × 2 = 2

S: 1,5 × 2 = 3

O: 6 × 2 = 12

La fórmula empírica es Cr₂S₃O₁₂.

Answer: The empirical formula of the compound becomes \(Cr_2S_3O_{12}\)

Explanation:

The empirical formula is the chemical formula of the simplest ratio of the number of atoms of each element present in a compound.

Let the mass of the compound be 100 g

Given values:

% of Cr = 26.53%

% of S = 24.52%

% of O = 48.96%

Mass of Cr = 26.53 g

Mass of S = 24.52 g

Mass of O = 48.96 g

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\) ......(1)

To formulate the empirical formula, we need to follow some steps:

Step 1: Converting the given masses into moles.

Molar mass of Cr = 52 g/mol

Molar mass of S = 32 g/mol

Molar mass of O = 16 g/mol

Putting values in equation 1, we get:

\(\text{Moles of Cr}=\frac{26.53g}{52g/mol}=0.510 mol\)

\(\text{Moles of S}=\frac{24.52g}{32g/mol}=0.766 mol\)

\(\text{Moles of O}=\frac{48.96g}{16g/mol}=3.06 mol\)

Step 2: Calculating the mole ratio of the given elements.

Calculating the mole fraction of each element by dividing the calculated moles by the least calculated number of moles that is 0.510 moles

\(\text{Mole fraction of Cr}=\frac{0.510}{0.510}=1\)

\(\text{Mole fraction of S}=\frac{0.766}{0.510}=1.5\)

\(\text{Mole fraction of O}=\frac{3.06}{0.510}=6\)

Multiplying the mole fraction of all the elements by 2, in order to make it as a whole number

\(\text{Mole fraction of Cr}=(2\times 1)=2\)

\(\text{Mole fraction of S}=(2\times 1.5)=3\)

\(\text{Mole fraction of O}=(2\times 6)=12\)

Step 3: Taking the mole ratio as their subscripts.

The ratio of Cr : S : O = 2 : 3 : 12

Hence, the empirical formula of the compound becomes \(Cr_2S_3O_{12}\)

What is the pOH of water?

What is the pOH of water?

Answers

Answer:

A. 7

(assuming the water is neutral)

What molecule(s) could diffuse across the plasma membrane? question 31 options: disaccharides fe2 tryptophan amino acid ch4

Answers

The molecule that could diffuse across the plasma membrane is methane (CH4).

What is diffusion?

Diffusion is the movement of fluids or substances from regions of high concentration toward regions of lower concentration.

The plasma membrane is the semipermeable membrane that surrounds the cytoplasm of a cell. The semipermeability means that it allows some molecules through but blocks other substances.

The semipermeable plasma membrane readily allows the passage of small hydrophobic and polar molecules.

Therefore, the molecule that could diffuse across the plasma membrane is methane (CH4).

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a serving of a particular fruit dessert contains 20.0 g of sugar. if all the sugar is sucrose, c12h22o11, how many molecules of sugar are present in this serving?

Answers

Taking into account the definition of Avogadro's number and molar mass, 3.49334×10²² molecules of sucrose are present.

Definition of molar mass

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

Avogadro's Number

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.

Molecules of sugar in this case

In first place, the molar mass of sucrose is 342 g/mole. So, you can apply the following rule of three: If by definition of molar mass 342 grams of the compound are contained in 1 mole, 20 grams of the compound are contained in how many moles?

\(amount of moles=\frac{20 gramsx1 mole}{342 grams}\)

amount of moles= 0.058 moles

Now, considering the Avogadro's number, you can apply the following rule of three: If 1 mole of the compound contains 6.023×10²³ molecules, 0.058 moles contains how many molecules?

amount of moleculas= (6.023×10²³ molecules × 0.058 moles)÷ 1 mole

amount of molecules= 3.49334×10²² molecules

Finally, 3.49334×10²² molecules of sucrose are present.

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SENSORCAINE/EPINEPHRINE is an injectable solution that contains 0.25% w/v bupivacaine HCl and 1:200,000 w/v epinephrine. How much epinephrine (mg) would be contained in a 50-mL vial of this solution? Please round to the nearest hundredth. Please show the work up steps. (answer is 0.25 mg)

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A 50-mL vial of SENSORCAINE/EPINEPHRINE solution contains approximately 0.25 mg of epinephrine. This is calculated based on the concentration of 1:200,000 w/v in the solution.

To determine the amount of epinephrine (mg) in a 50-mL vial of SENSORCAINE/EPINEPHRINE solution, we need to consider the concentration of epinephrine in the solution. The solution contains 1:200,000 w/v epinephrine, which means that for every 1 part of epinephrine, there are 200,000 parts of the solution.

To calculate the amount of epinephrine in the solution, we can use the following formula:

Amount of epinephrine = Total volume of solution (mL) × Concentration of epinephrine (mg/mL)

In this case, the total volume of the solution is 50 mL, and the concentration of epinephrine is 1:200,000 w/v. To convert the concentration to mg/mL, we divide 1 mg by 200,000 mL:

Concentration of epinephrine (mg/mL) = 1 mg / 200,000 mL = 0.000005 mg/mL

Finally, we can calculate the amount of epinephrine in the 50-mL vial:

Amount of epinephrine = 50 mL × 0.000005 mg/mL = 0.00025 mg

Rounding to the nearest hundredth, the amount of epinephrine in a 50-mL vial of SENSORCAINE/EPINEPHRINE solution is 0.25 mg.

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what is the net ionic equation for CrCl3 + Ba(NO3)2

Answers

Answer:

\(3Ba^{2+}\text{ + 6Cl}^-\text{ }\rightarrow\text{ 3BaCl}_{2(s)}\)

Explanation:

Here, we want to write the net ionic equation

We start by writing the complete equation of reaction:

\(2CrCl_3\text{ + 3Ba\lparen NO}_3)\placeholder{⬚}_2\rightarrow3BaCl_{2(s)}\text{ + 2Cr\lparen NO}_3)\placeholder{⬚}_3\)

Now, we write out the ions as follows:

\(2Cr^{3+}\text{ + 6Cl}^-\text{ + 3Ba}^{2+}\text{ + 3NO}_3^-\text{ }\rightarrow\text{ 3BaCl}_2\text{ + 2Cr}^{3+}\text{ + 3NO}_3^-\)

The Chromium and Nitrate ions are spectator ions

Thus, we have:

\(3Ba^{2+}\text{ + 6Cl}^-\text{ }\rightarrow\text{ 3BaCl}_2\)

Medicine. A pharmaceutical company conducts an experiment in which a subject takes 100mg of a substance orally. The researchers measure how many minutes it takes for half of the substance to exit the bloodstream. What kind of variable is the company studying?

Answers

The researchers may use statistical analysis to estimate the half-life and evaluate the substance's pharmacokinetic properties, such as absorption, distribution, metabolism, and elimination.

The variable that the pharmaceutical company is studying in this experiment is a pharmacokinetic variable known as the "half-life" of the substance. The half-life represents the time it takes for the concentration or amount of a substance in the bloodstream to decrease by half.

In this case, the researchers are administering 100mg of the substance orally to the subject and then measuring the time it takes for half of the substance to be eliminated from the bloodstream. The half-life is a crucial parameter in pharmacokinetics as it provides information about the rate of elimination or clearance of the substance from the body.

The half-life variable is a quantitative variable because it represents a measurable quantity, specifically the time duration. It is a continuous variable as it can take any positive value on the time scale, depending on the specific substance being studied. The researchers may use statistical analysis to estimate the half-life and evaluate the substance's pharmacokinetic properties, such as absorption, distribution, metabolism, and elimination.

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Assume we have 759 liters of N, at ST. What is the mass of the nitrogen gas? Give answers to the nearest whole number.

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The mass of the nitrogen gas is approximately 949 grams.

What is the mass of the nitrogen gas?

The mass of the nitrogen gas can be calculated using the ideal gas law, which states:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature in Kelvin. R is the ideal gas constant ( 0.08206 Latm/molK )

Given thw volume of the Nitrogen gas to be 759l, at ST, temperature equals 273.15 K and pressure 1 atm.

we can rearrange the ideal gas law to solve for n:

PV = nRT

n = PV / RT

Plug in the values

n = ( 1 atm × 759 L ) / ( 0.08206 Latm/molK × 273.15 K )

n = 33.86 mol

Finally, we can calculate the mass of the nitrogen gas using the molar mass of nitrogen:

m = n × M

Where M = 28.02 g/mol is the molar mass of nitrogen.

m = 33.86 mol × 28.02 g/mol

m = 949 g

Therefore, the mass is 949 g.

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