the total pressure of a gas mixture consisting of 0.550 mol n2, 0.200 mol o2, 0.100 mol co2 is 1.32 atm. calculate the partial pressures of oxygen.

25.07grams is the theoretical yield of magnesium hydroxide if the resulting solution has a volume of 2. 82 liters.

Mass of any substance will be calculated from moles as:

n = W/M, where

W = given or required mass

M = molar mass

Given chemical reaction is:

2NaOH + MgCl₂ → Mg(OH)₂ + 2NaCl

From the stoichiometry of the reaction, it is clear that:

2 moles of NaOH = produce 1 mole of Mg(OH)₂

1 mole of NaOH = produce 1/2 mole of Mg(OH)₂

Given concentration of NaOH = 1.35M

Given volume of NaOH = 637mL = 0.637L

Moles of NaOH will be calculated as:

M = n/V

n = 1.35M × 0.637L = 0.859 moles

So, 0.859 moles of NaOH = produce 0.859×1/2 = 0.429 moles of Mg(OH)₂

Now, we convert this moles into grams by using the above formula:

0.429 = W/58.31 g/mole

W = 25.07grams

Hence, 25.07grams is the theoretical yield of magnesium hydroxide.

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Answer:

A water turbine is used to convert the energy contained in water, potential energy or kinetic energy, into mechanical or electrical energy. There are two types of water turbines, the reaction water turbine, and the impulse water turbine.

Explanation:

Answer:

Water turbines are used to take energy whether it may be kinetic or potential from the water and convert that energy into mechanical, or electrical energy.

Explanation:

Answer:

CH4 + 2O2 → CO2 + 2H2O

Explanation:

This is all i could come up with im sorry.

The amount of water formed in the given chemical reaction is 9 grams.

Stoichiometry is the calculation for the determination of the relative amount of reactants and products in chemical reactions. Stoichiometry is based on the law of conservation of mass where the total mass of the reactants in reaction equals the total mass of the products.

If the quantity of one reactant is known and the quantity of the product can be determined empirically, then the quantity of the other reactants can be calculated.

Given chemical equation is:

CH₄  +   2O₂  \(\longrightarrow\)   CO₂   +   2H₂O

16g        32g         44g           32g        (from their molecular masses)

The amount of methane, oxygen, and carbon dioxide is 4g, 16g, and 32 g respectively.

16g of methane react with oxygen = 32g

4g of  methane will react with oxygen = 8g

It means here methane is the limiting reagent as the given amount of oxygen is more than reacted one.  So CH₄ will decide the amount of water.

16g of methane produces water = 32g

Then 4g of methane will produce water = (32/16) × 4 = 9 g

Therefore, 9 grams of water should be formed in this reaction.

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Answer:

2Al + 3H2SO4 → Al2(SO4)3 + 3H2

3mol H2SO4 produce 1 mol Al2(SO4)3\

Molar mass H2SO4 = 98 g/mol

Mass 3 mol H2SO4 = 98 g/mol * 3 mol = 294 g

Molar mass Al2(SO4)3 = 342 g/mol

294 g H2SO4 produce 342 g Al2(SO4)3

250 g H2SO4 will produce 250 g / 294 g * 342 g Al2(SO4)3 = 291 g Al2(SO4)3

Answer:

When the bell is rung the switch closes allowing electricity to flow making the hammer hit the bell, making the sound to alert people in the house.

Explanation:

The vapor pressure of the solution is approximately 16.04 mmHg

To determine the vapor pressure of the solution, we can use Raoult's law, which states that the vapor pressure of a solvent above a solution is directly proportional to the mole fraction of the solvent present in the solution.

First, let's calculate the mole fraction of water in the solution.

Molar mass of AlCl3 = 133.34 g/mol

Molar mass of H2O = 18.015 g/mol

Number of moles of AlCl3 = 66.7 g / 133.34 g/mol = 0.5 mol

Number of moles of H2O = 100.0 g / 18.015 g/mol = 5.549 mol

Mole fraction of water (X_H2O) = moles of H2O / total moles

X_H2O = 5.549 mol / (0.5 mol + 5.549 mol) = 0.917

The mole fraction of aluminum chloride (X_AlCl3) can be calculated as:

X_AlCl3 = 1 - X_H2O

X_AlCl3 = 1 - 0.917 = 0.083

Now we need to find the vapor pressure of water at 20°C. At this temperature, the vapor pressure of pure water is approximately 17.5 mmHg.

Using Raoult's law, the vapor pressure of the solution is given by:

P_solution = P_H2O * X_H2O + P_AlCl3 * X_AlCl3

Since aluminum chloride is assumed to be 100% dissociated, its vapor pressure is negligible. Therefore, we can neglect the term P_AlCl3 * X_AlCl3.

P_solution = P_H2O * X_H2O

P_solution = 17.5 mmHg * 0.917

P_solution ≈ 16.04 mmHg

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The number of carbon atoms at STP is  1.47 x 10²³ atoms

STP stands for standard temperature and pressure. STP refers to a specific pressure and temperature used to report on the properties of matter.

According to IUPAC( International Union of Pure and Applied Chemistry), it is defined as -

It is generally needed to test and compare physical and chemical processes where temperature and pressure plays an important role as they keep on varying from one place to another.

One mole of a gas under STP conditions occupies a volume of 22.4L.

Given,

Volume of CO₂ = 5.50 L

number of moles of CO₂ = 5.5 ÷ 22.4

                                        = 0.245 moles

We know that,

                     1 mole = 6.023 x 10²³ atoms

So, 0.245 moles will have 6.023 x 10²³ × 0.245 atoms

                            =  1.47 x 10²³ atoms

Therefore, the number of carbon atoms at STP is  1.47 x 10²³ atoms

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Counting electrons

When drawing molecules, an important first step is to first count the total valence electrons (electrons in the outer shell) in the molecule. Sulfur has 6 valence electrons, each oxygen has 6 valence electrons, and the 2- charge indicates there are 2 additional electrons. This comes out to be a total of 32 electrons.

Drawing the molecule

The next step is to draw the general shape of the molecule. In this case, sulfur is the central atom and 4 oxygens surround it, so draw a sulfur atom labelled as S with 4 oxygens equally spaced around it.

Next, you want to fill in the bonds between each oxygen to the sulfur atom. This will be a total of 4 bonds.

Now, count the number of electrons used. 4 bonds consisting of 2 shared electrons each is 8 electrons. We have 24 electrons left.

Add these remaining 24 electrons to the surrounding oxygens in pairs of 2, making sure that no atom has more than 8 electrons around it (1 bond and 3 pairs).

This is one possible structure of SO4 2-, but it is not the most common one.

Formal charge of each atom in a molecule is calculated by taking the normal amount of valence electrons, in sulfur for example, 6, and subtracting it by the total amount of non-bonding electrons and the amount of bonds. In this case in the structure we just drew above, the formal charge is 6-4=2, where 4 is the amount of bonds to sulfur.

FC=V−N−B/2

this is the equation for formal charge. V is the valence electrons of the atom in its ground state, or when it is not bonded to anything else. N is the number of non-bonding, or loose, electrons around the atom in the molecule. B is the number of electrons that are in bonds.

All atoms in a molecule want to have a formal charge as close to zero as possible, and this is a rare case where sulfur can be an exception to the octet rule and have more than 8 valence electron in order to satisfy this need.

Therefore, in this case, 2 of the single bonds around sulfur can be replaced by double bonds, so that the formal charge is 6-6=0. So, for two of the oxygens, remove one pair of electrons and turn them into bonds with sulfur.

There are several different places you can add these double bonds, which lead to structures called resonant structures. Resonant structures have the same number of non bonding electrons and bonds, but the single and double bonds are in different places.

The attached image is just one resonant structure, but keep in mind there are other possible very similar structures-- for example, the double bonds could be opposite of each other.

These structures are more common as they have the lowest formal charge on the central atom, sulfur.

Answer: Exothermic reactions are reactions or processes that release energy, usually in the form of heat or light.

Explanation: In an exothermic reaction, energy is released because the total energy of the products is less than the total energy of the reactants.

Answer:

The answer to this is A. One kind of atom

Explanation:

The other options make no sense whatsoever. But enjoy.

I hope this helped.

Answer:

A. One kind of atom

Explanation:

Answer:

The metal with the highest melting point is tungsten, which has a melting point of about 3,410 degrees Celsius (6,170 degrees Fahrenheit). Tungsten is known for its high melting point and excellent resistance to wear and corrosion, which makes it a useful material in many industrial applications.

Other metals with high melting points include osmium (3,060 degrees Celsius), rhenium (3,180 degrees Celsius), and tantalum (2,996 degrees Celsius). These metals are also known for their excellent resistance to wear and corrosion, and are used in a variety of industrial and technical applications.

It is worth noting that the melting point of a metal can depend on the purity and crystalline structure of the sample, and can vary slightly from one sample to another. However, tungsten is generally considered to have the highest melting point of any pure metal.

Yes, I am agree with the evaporating dish is not preheated, then the mass of the anhydrate will be heavier, resulting in a greater value for the anhydrate and a smaller value for "z" in this formula:

CuxCly • zH2O

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Answer:

The longer it takes to orbit the sun.

Explanation:

The products of electrolysis of concentrated aqueous solution of sodium chloride are sodium hydroxide, hydrogen gas and chlorine gas.

What is electrolysis?

By passing a direct electric current through an ionic compound in fluid form, electrolysis is the process of breaking down the substance into its constituent elements. Anions are oxidized at the anode while cations are reduced at the cathode. An electrolyte, electrodes, and some sort of external power source are the essential components needed to perform electrolysis.

Several large compounds with industrial use, such as sodium hydroxide and chlorine, are produced by an important process called sodium chloride electrolysis. It is possible to electrolyze sodium chloride in aqueous solutions or in a molten state. In order to speed up the redox processes, extra salts are also present when electrolysis is performed.

The electrolysis of a concentrated solution of NaCl gives (I) Cl2, (II) NaOH (aq) and (III)H 2 (g).

\(2NaCl (aq) + 2H2O\) →  \(2NaOH (aq) + H2(g) + Cl2 (g)\)

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Answer:

This equation is a double reaction

Explanation:

I hope this is the answer

Answer:

ca(OH)2 is the base and CaCI2 is the salt

Explanation:

The diameter of a hydrogen atom is about 100 word meter. Length of a line of atoms in scientific notation is 1 × 10^-10.

Suppose hydrogen atoms were arranged side by side in a straight line. We need to multiply these numbers to find the length of this line of atoms. We will calculate the length of this line of atoms by using the formula:

Length of a line of atoms = Number of atoms × Diameter of an atom

Here,Number of atoms = Length of a line of atoms / Diameter of an atom

The diameter of a hydrogen atom is about 10^-10 meter.

Length of a line of atoms = Number of atoms × Diameter of an atom

We know that Number of atoms = Length of a line of atoms / Diameter of an atom

Therefore, Length of a line of atoms = Number of atoms × Diameter of an atom

Length of a line of atoms = (1 × 10^0) × (1 × 10^-10)

Length of a line of atoms = 1 × 10^-10

Length of a line of atoms in scientific notation is 1 × 10^-10.

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On the basis of arrangement of atoms, the matter is classified into three states: solid, liquid and gas.

In Chemistry, there are three fundamental states of matter based on the arrangement of molecules and atoms inside it.

Generally, solids have strict and rigid arrangement of atoms as they posses strong intermolecular forces and have high melting and boiling points. solids have fixed composition of atoms.

Similarly, liquids have loose arrangement of atoms and molecules keep moving randomly in a liquid. Liquids have low melting and boiling points as compared to solids. Gases have weakest intermolecular forces and atoms are arranged randomly in them. Also, their molecules keep moving in all directions.

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The percentage of salt in the saturated solution would be approximately 26.31%.

Percentage of salt = (mass of salt/mass of solution) * 100

= (35.7 g / (35.7 g + 100 g)) * 100

= (35.7 g / 135.7 g) * 100

≈ 26.31%

A saturated solution refers to a solution in which the maximum amount of solute has been dissolved in a given solvent at a particular temperature and pressure. In simpler terms, it is a solution where no more solute can dissolve. At this point, the solution is said to be in equilibrium because the rate of dissolution of solute particles is equal to the rate of precipitation or crystallization of solute particles.

To achieve a saturated solution, one typically adds solute to a solvent while continuously stirring until no more solute can dissolve, or until some undissolved solute remains in the solution. The solubility of a substance is influenced by factors such as temperature, pressure, and the nature of the solute and solvent.

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The formula for the compound dinitrogen pentoxide is N2 O5.

What is compound ?

A compound combines one or more additional substances to form a new product. The combination of two substances or elements is equal to the mass ratio for making that product. It is attached firmly, and they have equal in all ways to form a combination. The elements both are bonded together. Each compound has its chemical structure; if it breaks, it can either split into two atoms or molecules or in a single. Different types of compounds are present. An intermetallic compound is made of an alloy of metallic ions. The ions form ionic compounds with the help of the electrostatic force.

What is element ?

The atoms make the element. The atoms are created up of the element; it is a pure substance it can't be able to split up. The element is created up of a single kind of atom. Atoms are the main thing for the creation of elements. Elements are classified according to their performance and physical properties. Elements are placed based on the performance in the Mendeleev periodic table.

Therefore,  formula for the compound dinitrogen pentoxide is N2 O5.

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The amount of water that could be heated from 21 ∘C to 45 ∘C by the car's energy is approximately 10 grams, to two significant figures.

To calculate the amount of water that could be heated from 21 ∘C to 45 ∘C, we need to know the amount of energy provided by the car. Let's assume that thecar provides 1000 joules of energy.

Now, we can use the specific heat capacity of water to calculate the mass of water that can be heated by this amount of energy. The specific heat capacity of water is 4.184 J/g⋅∘C, which means that 4.184 joules of energy are required to heat 1 gram of water by 1∘C.

We can use the following formula to calculate the mass of water:

energy = mass x specific heat capacity x temperature change

where energy is the amount of energy provided by the car, specific heat capacity is 4.184 J/g⋅∘C, and temperature change is the difference between the final and initial temperatures of the water, which is 45 ∘C - 21 ∘C = 24 ∘C.

Rearranging the formula, we get:

mass = energy / (specific heat capacity x temperature change)

\(mass = 1000 J / (4.184 J/g⋅∘C x 24 ∘C) ≈ 10 g\)

Therefore, the amount of water that could be heated from 21 ∘C to 45 ∘C by the car's energy is approximately 10 grams, to two significant figures.

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The reactivity series can help to understand the feasibility of the reaction. As per reactivity series the copper ion is present below hydrogen so the reaction in option d cannot take place.

Reactivity series is a list of metals which are arranged in decreasing order of the reactivity and according to this series, the reaction can be predicted.

As in substitution reaction only those metal can replace the other that is having higher reactivity.

In the given reactions, the reaction between hydrochloric acid and copper cannot take place as copper stands below hydrogen so having less reactivity, due to this it will not be able to displace hydrogen from the reaction.

Thus, the correct option is d.

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Answer:

5

Explanation:

An ion has a net charge of 3+

ion has 8 protons

How many electrons does it have

A neutral atom has equal number of electrons and protons.

If a neutral atom loses electron it acquires a positive charge.

So to acquire 3+ charge the atom must have lost three electrons.

So the number of protons exceeds the number of electrons by 3.

The correct answer is E) Solution B is 3 times more alkaline (basic) than solution A.

pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water. This is because the pH scale is logarithmic, meaning that each whole number difference represents a tenfold difference in acidity or alkalinity. Therefore, the difference between pH 6 and pH 9 is three whole numbers, which means solution B is three times more alkaline than solution A. Solutions with lower pH values are more acidic, while solutions with higher pH values are more alkaline.

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Answer:

123.5 kPa

Explanation:

P2=P1T2/T1

You can check this by knowing that P and T at constant V have a proportional relationship. Hence, this is correct.

In the bohr model of the hydrogen atom, the energy required to excite an electron from n = 2 to n = 3 is greater than the energy required to excite an electron from n = 3 to n = 4

Bohr's energy levels:

The essential concept of Bohr's atomic model is that electrons occupy specified orbitals that call for the electron to have a certain amount of energy. An electron needs to be in one of the permitted orbitals and have the correct amount of energy needed for that orbit in order to be in the electron cloud of an atom. An electron would require less energy to orbit near the nucleus, while an electron would need more energy to orbit away from the nucleus. Energy levels are the potential orbits. One of Bohr's models' flaws was that he was unable to explain why just specific energy levels or orbits were permitted.

It is evident that the energy required to escape an electron from n=2 to n=3 is greater than the energy required to exit an electron from n=3 to n=4. This is because as n increases, the energy levels move closer to one another.

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a) The absolute standard deviation of the concentration of NaOH is 0.0041 M.

b) The standard error of the concentration of NaOH is 0.0018 M.

c) The confidence interval of the concentration of NaOH is (0.1033 M, 0.1060 M).

d) Yes, the sample mean is significantly different from the true concentration of 0.1045 M.

e) No, the mean concentrations from the two students' results are not similar to each other.

a) To calculate the absolute standard deviation of the concentration of NaOH, we need to find the standard deviation of the given data points. Using the formula for sample standard deviation, we calculate the average deviation of each data point from the mean concentration, then square each deviation, take the average of the squared deviations, and finally, take the square root. The absolute standard deviation is the absolute value of the standard deviation.

b) The standard error of the concentration of NaOH measures the variability of the sample means from different samples. It is calculated by dividing the standard deviation by the square root of the sample size. In this case, the sample size is 5.

c) To calculate the confidence interval of the concentration of NaOH, we need to determine the margin of error using the t-distribution and the sample standard deviation. With a 95% confidence level, we use a t-value corresponding to 4 degrees of freedom (n-1) and multiply it by the standard error. The confidence interval is constructed by subtracting and adding the margin of error to the sample mean concentration.

d) To determine if the sample mean is significantly different from the true concentration, we compare the true concentration to the confidence interval. If the true concentration falls outside the confidence interval, then the sample mean is significantly different from the true concentration.

e) To assess if the mean concentrations from the two students' results are similar to each other, we can calculate the confidence intervals for each student's data. If the confidence intervals overlap or are close to each other, it suggests that the mean concentrations are similar. However, if the confidence intervals do not overlap, it indicates that the mean concentrations are likely different.

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Answer:

Pacific Ocean

Explanation: