You have a two-liter sample of each of the following gases, all at 25 °C and one atmosphere pressure. Which sample will weigh the most?A) Ammonia.B) Argon.C) Carbon dioxide.D) Nitrogen dioxide.E) Oxygen.

The average weight loss is 0.739 mg/s.

The total weight lost by the individual = 15 lb

To convert Ib to mg

1 Ib = 453592 mg

15 lb = 15 lb * 453592 mg/ 1 Ib

= 6803880 mg

The time taken for the weight loss = 3.5 months

Number of seconds in 3.5 months = 9.198 * 10^6 seconds

Hence;

Average weight loss in milligrams per second (mg/s);

Weight lost/ time taken

6803880 mg/9.198 * 10^6 seconds

= 0.739 mg/s

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Answer:

Below

Explanation:

Density = mass / volume      the volume = the amountof water displaced

Density = 96 g /4 cc = 24 g/cc     ( cc and ml are the same )

Answer:

250 grams = 0.25 liter

Explanation:

The Sun is presently at a low level of sunspot activity. Hence, option C is correct.

Solar radiation is often called the solar resource for the electromagnetic radiation emitted by the sun.

The Sun is presently at a low level of sunspot activity is the correct answer.

Hence, option C is correct.

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The vapor pressure lowering of water in this solution is 1165 torr.

What is vapor pressure?
The pressure that a vapour exerts on its condensed phases in a closed system at a specific temperature is known as the vapour pressure or equilibrium vapour pressure. An indicator of a liquid's evaporation rate is the equilibrium vapour pressure. It has to do with how easily liquid-borne particles tend to elude detection (or solid). Volatile is a term used to describe a chemical that, at room temperature, has a high vapour pressure. Vapor pressure is the force that a vapour cloud exerts over a liquid surface. The kinetic energy of a liquid's molecules increases along with the temperature. The number of molecules vaporising also rises as a function of the molecules' rising kinetic energy, which raises the vapour pressure.

the vapor pressure of water and the mixture is 355 torr and 760 torrs. Therefore, the value of vapor pressure of oxygen would be,

Ptotal=PO2+PH2O

760=PO2+355

760−355=PO2

405=PO2

So, at the temperature, the vapor pressure of  Ethylene is 405 torr.

When volume reduces to 50ml, the pressure of the oxygen would be,

P1V1=P2V2

where P1 and P2 are the pressure and V1 and V2 are the volumes.

P1V1=P2V2

P1V1/V2=P2

405×100 / 50=P2

810=P2

So, when the volume is 50ml the vapor pressure of the oxygen is 810 torr.

Now the total pressure of water-saturated oxygen at 50 ml volume is,

Ptotal=PO2+PH2O

Ptotal=810+355

Ptotal=1165

So, the total vapor pressure is 1165 torr.
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Answer:

The reaction between carbon (C) and water (H2O) forms carbon monoxide (CO) and hydrogen gas (H2). The balanced chemical equation for this reaction is:

C(s) + H2O(g) -> CO(g) + H2(g)

According to this balanced equation, one mole of carbon reacts with one mole of water to produce one mole of carbon monoxide and one mole of hydrogen gas.

First, calculate the number of moles of carbon in 34 grams. The molar mass of carbon is approximately 12.01 grams/mole.

Moles of carbon = 34 grams / 12.01 grams/mole = 2.831 moles

As the stoichiometry of the reaction shows a 1:1 ratio between carbon and hydrogen, the moles of hydrogen produced would also be 2.831 moles.

The molar mass of hydrogen (H2) is approximately 2 grams/mole.

So, the mass of hydrogen produced = 2.831 moles * 2 grams/mole = 5.662 grams

Therefore, if 34 grams of carbon reacts with an unlimited amount of water, approximately 5.66 grams of hydrogen gas would be formed.

Explanation:

Approximations followed for answer.

Step by step solutions:

1 mole of A contains 6.022x10^23 molecules

∴ x moles A contains 5.99x10^23 molecules

Then, moles of A = (5.99x10^23 /6.022x10^23 )molecules

=5.99/6.02

=0.995moles of A Sample

Given that -

Mass = 93.5g

Mol Mass Ammonium carbonate (NH4)2CO3= 96,09 g/mol

∴ moles B = mass /molecular mass

=93.5g /96.09g/mol

=0.973 moles of sample B

Conclusion: Sample A has 0.995 moles, this is bigger that the moles of Sample B that has 0.973 moles.

Based on the given bright-line spectra and the observed wavelengths in the mixture's spectrum, the elements G and J are the ones present in the mixture.

From the given bright-line spectra and the spectrum of the mixture, we can determine the elements present in the mixture by comparing the specific wavelengths observed. Examining the bright-line spectra, we can identify that G has a distinct wavelength at 650 nm, J at 600 nm, L at 550 nm, and M at 500 nm.

Looking at the spectrum of the mixture, we can observe two prominent wavelengths, 650 nm and 600 nm. These correspond to the wavelengths of G and J, respectively. Since the spectrum of the mixture does not exhibit the wavelengths specific to L (550 nm) or M (500 nm), we can conclude that only G and J are present in the mixture.

Therefore, based on the given bright-line spectra and the observed wavelengths in the mixture's spectrum, the elements G and J are the ones present in the mixture.

This analysis relies on the principle that each element has characteristic wavelengths at which they emit light. By comparing the observed wavelengths in the mixture's spectrum with those of the individual elements, we can determine the elements present in the mixture.

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Answer:

a. 1

b. 0.465M NaOH

Explanation:

KHP reacts with NaOH as follows:

KHP + NaOH → KP⁻ + Na⁺ + H₂O

a. Molar ratio represents how many moles of NaOH reacts per mole of KHP. As you can see in the reaction, 1 mole of NaOH reacts with 1 mole of KHP. Molar ratio is:

1/1 = 1

b. With volume and molar concentration of the KHP solution you can find how many moles of KHP were added until equivalence point, thus:

15.5mL = 0.0155L ₓ (0.600 moles KHP / L) = 0.0093 moles of KHP

In equivalence point, moles of NaOH = Moles KHP. That means moles of NaOH titrated are 0.0093 moles NaOH.

The volume of the NaOH solution was 20mL = 0.020L. Molarity of the solution is:

0.0093 moles NaOH / 0.020L =

a. The balanced equation shows a 1:1 molar ratio between NaOH and KHC₈H₄O₄. This means that for every 1 mole of NaOH, we require 1 mole of KHC₈H₄O₄. Therefore, the molar ratio of NaOH:KHC₈H₄O₄ is 1:1.

The balanced equation for the reaction:

NaOH + KHC₈H₄O₄ → NaKC₈H₄O₄ + H₂O

b. Molarity of KHP solution × volume of KHP solution = Molarity of NaOH solution × volume of NaOH solution at the equivalence point

Molarity of KHP solution = 0.600 M

Volume of KHP solution = 15.5 mL = 0.0155 L

Volume of NaOH solution at the equivalence point = 20 mL = 0.0200 L

Molarity of NaOH solution = (Molarity of KHP solution × volume of KHP solution) / volume of NaOH solution at the equivalence point

Molarity of NaOH solution = (0.600 M × 0.0155 L) / 0.0200 L

Molarity of NaOH solution ≈ 0.465 M

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The option A describes an exothermic reaction.

i.e, ΔHt,reactant > ΔHt, product

The reaction in which energy is release during the formation of reaction is called exothermic reaction.

Mathematically,

ΔHf = ΔH(product) - ΔH(reactant)

For exothermic reaction, ΔHt,reactant > ΔHt, product

So,for exothermic reaction, ΔHf is negative.

Where,

ΔHf = Enthalpy of formation of reaction

ΔH(product) = enthalpy of formation of product

ΔH(reactant) = enthalpy of formation of reactant

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The term that the scientist would use in this case is partial pressure. Option D

The pressure that one particular gas component within a mixture of gases exerts is referred to as partial pressure. It is the pressure that the gas would experience at the same temperature if it were the only thing in the entire volume.

When researching gas mixtures, such as in gas laws, gas phase equilibria, and gas collecting methods, partial pressures are extremely crucial for the gas.

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The statement about cells and genes that is false is a) the sequencing of bases within a gene is of little significance.

The sequence of bases is of major significance in an individual and hence option a is false. The sequences of bases in a gene help in the formation of specified proteins that carry out the functioning in an individual. The sequencing of the bases is also important as any change in the bases can cause the wrong proteins to be formed which might cause the ultimate death of an individual if a major kind of protein is not produced.

The sequence of bases also determines if there are chances of any disorder to occur in an individual due to the pattern of bases being changed.

The question will correctly be written as:

Which of the following statements about cells and genes is false? multiple choice

a) the sequencing of bases within a gene is of little significance.

b) each chromosome contains hundreds to thousands of genes.

c) each cell contains 23 pairs of chromosomes.

d) our bodies are made up of about 260 different types of cells.

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Answer: % 50

Explanation: Aa x aa = Aa Aa aa aa

Answer:

15

Explanation:

Answer:

Explanation:

1+ 2+ 3+

copper(I), Cu+ cadmium, Cd2+ chromium(III), Cr3+

gold(I), Au+ chromium(II), Cr2+ cobalt(III), Co3+

mercury(I), Hg22+ cobalt(II), Co2+ gold(III), Au3+

silver, Ag+ copper(II), Cu2+ iron(III), Fe3+

The heat absorbed by the water is 25.9 KJ

To solve the question given above, we'll begin by calculating the change in the temperature of the water. This can be obtained as follow:

Initial temperature (T₁) = 25 °C  

Final temperature (T₂) = 32.50 °C

ΔT = 32.50 – 25

Finally, we shall determine the heat absorbed by the water. This can be obtained as follow:

Mass of water = 825.4 g

Change in temperature (ΔT) = 7.5 °C

Specific heat capacity of water = 4.184 J/gºC

Q = 825.4 × 4.184 × 7.5

Q = 25901.052 J

Divide by 1000 to express in KJ

Q = 25901.052 / 1000

Therefore, the heat absorbed by the water is 25.9 KJ.

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The volume (in L) of O₂ gas, measured at 792 mmHg and 23 °C, that is required to completely react with 52.6 g of Al is 34.14 L

We'll begin by obtaining the mole of O₂ that reacted. This can be obtained as follow:

4Al(s) + 3O₂(g) → 2Al₂O₃(s)

From the balanced equation above,

4 moles of Al reacted with 3 moles of O₂

Therefore,

1.948 moles of Al will react with = (1.948 × 3) / 4 = 1.461 mole

Finally, we shall determine the volume of the O₂ required. Details below

PV = nRT

1.042 × V = 1.461 × 0.0821 × 296

Divide both sides by 1.04

V = (1.461 × 0.0821 × 296) / 1.04

V = 34.14 L

Thus, the volume required is 34.14 L

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In my own opinion, scientists should continue to try create super heavy elements and expand the periodic simply because these elements will help understand better, nuclei structure, properties and its reactions

An element is a substance which cannot be split into simpler forms by an ordinary chemical process. This simply goes to say that elements are substances which cannot be decomposed into simpler substances by ordinary chemical reactions.

An atom is the smallest unit or part of an element which can take part in a chemical reaction.

On a general note, elements are classified as thus:

So therefore, in my own opinion, scientists should continue to try create super heavy elements and expand the periodic simply because these elements will help understand better, nuclei structure, properties and its reactions

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We are given:

P1 = 1 atm                 P2 = 3 atm

T1 = 300 K               T2 = 600 K

V1 = 6 L                    V2 = v L

Finding the final Volume:

From the ideal gas equation:

PV = nRT

since in the given scenario, the universal gas constant (R) and number of moles(n) are constant

So, for both the cases, the value of n*R will be a constant k

Hence, we can write that:

PV / T = k        [where k is a constant]

Since the constant 'k' is the same for both the cases, we can write that:

P1V1 / T1 = P2V2 / T2

replacing the variables

1 * 6 / 300 = 3 * v / 600

1/50 = v / 200

v = 200/50

v = 4 L

Therefore, the volume of the gas at 600K and 3 atm will have a volume of 4 L

Answer:

See explanation

Explanation:

According to chemistry libretexts(2020); "The rms velocity is directly proportional to the square root of temperature and inversely proportional to the square root of molar mass. Thus quadrupling the temperature of a given gas doubles the rms velocity of the molecules. ... As the temperature of a gas is increased, the velocity of the molecules is also increased."

Hence considering two gases for which the  Vrms of the particles of one is high and that of the other is low, we can conclude that the gas having the higher  Vrms is at a higher temperature than the gas having a lower  Vrms according to the foregoing.

Potential energy is stored energy that is affected by the relative location of different components of a system. When a spring is squeezed or expanded, its potential energy increases.

Potential energy is the energy retained by an object as a result of its location relative to other objects, internal stresses, electric charge, or other variables.  Although it has ties to the ancient Greek scholar Aristotle's idea of potentiality, the word potential energy was coined by the 19th-century Scottish engineer and physicist William Rankine.

The gravitational potential energy of an object, the elastic potential energy of a stretched spring, and the electric potential energy of an electric charge in an electric field are all examples of common kinds of potential energy. The joule, denoted by the sign J, is the measure of energy in the International System of Units (SI).

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Answer:

2.24725 kilograms

Explanation:

To convert grams to kilograms, you divide the number of grams you have by 1000. So, 800 g = 2.225 x 1010/1000 = 2.24725 kg

Answer:

ok, here is your answer

Explanation:

AI-generated answer

To find the mass of oxygen that reacted, we need to use the Law of Conservation of Mass, which states that in a chemical reaction, the mass of the reactants equals the mass of the products.

First, we need to find the number of moles of hydrogen that reacted:

Molar mass of hydrogen (H₂) = 2.016 g/mol

Number of moles of H₂ = mass/molar mass = 46.2 g/2.016 g/mol = 22.92 mol

Next, we need to use the balanced chemical equation to find the number of moles of water produced:

hydrogen + oxygen → water

2H₂ + O₂ → 2H₂O

From the equation, we can see that for every 2 moles of H₂, 1 mole of O₂ is required to produce 2 moles of H₂O. Therefore, the number of moles of O₂ required to produce 22.92 moles of H₂O is:

Number of moles of O₂ = 1/2 x 22.92 mol = 11.46 mol

Finally, we can find the mass of oxygen that reacted by using its molar mass:

Molar mass of oxygen (O₂) = 32.00 g/mol

Mass of oxygen = number of moles x molar mass = 11.46 mol x 32.00 g/mol = 366.72 g

Therefore, the mass of oxygen that reacted is 366.72 g.

Answer:

Explanation:

uranium processing.

When the dipoles are organized in head-to-tail; antiparallel and side-to-side geometries, polar molecules exhibit attractive dipole-dipole interactions. molecules that are polar.

Because PCl₃ is polar, dipole-dipole attractions will occur. Nonpolar F₂, ionic FeCl₂, and nonpolar CO₂. Dipoles develop in amplitude as covalent bonds get more polar, and hence dipole-dipole attractions expand in size. Dipole-dipole interactions occur when partial charges produced inside one molecule are attracted to an opposing partial charge in a neighboring molecule. Polar molecules align so that the positive end of one molecule interacts with the negative end of another.

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The actual question is:

Polar molecules have attractive dipole-dipole interactions when the dipoles are arranged in which of the following geometries?(Select all that apply)

head-to-tail; side-to-side; antiparallel; diagonal; round and round

Answer:

A

Explanation:

Utility knife

Answer:

Utility knife

Explanation:

This is an exercise in the combined gas law is a fundamental law in physics and chemistry that describes the relationship between the pressure, volume, and temperature of a gas. It is also known as the Boyle-Mariotte-Gay-Lussac law, after the three scientists who independently discovered this law in the 17th century.

The combined gas law states that the product of the pressure, volume, and temperature of a gas is constant if the amount of gas and the initial and final conditions are the same. This law is very useful to understand the behavior of gases in different situations, such as in the atmosphere or in closed systems.

The Boyle-Mariotte law states that the pressure of a gas is inversely proportional to the volume of the gas if the temperature is held constant. In other words, if the volume of a gas is reduced, its pressure will increase, and if the volume is increased, its pressure will decrease. This is important in situations such as the operation of internal combustion engines, where compressed gases are used to generate power.

Gay-Lussac's law states that the pressure of a gas is directly proportional to its temperature if the volume is held constant. In other words, if the temperature of a gas is increased, its pressure will also increase, and if the temperature is decreased, its pressure will decrease. This law is important in situations such as the operation of refrigeration systems, in which compressed gases are used to cool the air.

Finally, Charles's law states that the volume of a gas is directly proportional to its temperature if the pressure remains constant. In other words, if the temperature of a gas is increased, its volume will also increase, and if the temperature is decreased, its volume will decrease. This law is important in situations such as the production of gases in chemical processes and the measurement of the temperature of gases in the atmosphere.

The combined gas law is essential for understanding the behavior of gases in different situations, and is used in fields as diverse as engineering, physics, chemistry, and biology. With this law, we can predict how gases will behave in specific situations, and use that information to design better systems and processes that use gases.

The mathematical formula that describes the combined gas law is:

(P₁ × V₁)/T₁ = (P₂ × V₂)/T₂

P₁ and P₂ are the initial and final pressures of the gas, respectively, in the same unit of pressure (for example, atmospheres, pascals, etc.)

V₁ and V₂ are the initial and final volumes of the gas, respectively, in the same unit of volume (for example, liters, cubic meters, etc.)

T₂ and T₂ are the initial and final temperatures of the gas, respectively, in the same temperature unit (for example, degrees Celsius, Kelvin, etc.)

The combined gas law tells us that the product of the pressure, volume, and temperature of a gas is constant if the amount of gas and the initial and final conditions are the same. This formula is very useful for predicting how one of these factors will change if the other two change.

It tells us that it releases a weather balloon of a V₁ = 4.20 L, with P₁ = 1.00 atm and a T₁ = 303 K, which shrinks by a size of V₂ = 3.80 L to a P₂ = 0.670 atm.

The first formula is the general one and the second is the final temperature formula.

(P₁ × V₁)/T₁ = (P₂ × V₂)/T₂

T₂ = (P₂ × V₂ × T₁)/(P₁ × V₁)

T₂ = (P₂ × V₂ × T₁)/(P₁ × V₁)

T₂ = (0.670 atm × 3.80 L × 303 K)/(1.00 atm × 4.20 L)

T₂ = (771.438 k)/(4.2)

T₂ ≈ 183.675 K

The temperature of the globe is approximately 183.675 Kelvin.

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