Chemistry High School

Describe graham's law.

hydrogen chloride gas (hcl) diffuses 1.8 times faster than an unknown gas. determine the molar mass of the unknown gas. show your work or explain your answer, giving specific values used to determine the answer.

Answers

Answer 1

The molar mass of gas is 6.48 g/mol

What is the statement of Graham's law?

Graham's law of diffusion states that the rate of diffusion of a gas is inversely proportional to the density of the gas.

The molar mass of Hydrogen gas = 2

R2/R1 = 1.8

Molar mass of gas = 2 × 1.8 × 1.8

Molar mass of gas = 6.48 g/mol

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Related Questions

Part 1. A chemist reacted 15.0 liters of F2 gas with NaCl in the laboratory to form Cl2 and NaF. Use the ideal gas law equation to determine the mass of NaCl that reacted with F2 at 280. K and 1.50 atm.


F2 + 2NaCl → Cl2 + 2NaF


Part 2. Explain how you would determine the mass of sodium chloride that can react with the same volume of fluorine gas at STP.


explain please (for 40 pts)

Answers

Answer:

113 g NaCl

Explanation:

The Ideal Gas Law equation is:

PV = nRT

In this equation,

    > P = pressure (atm)

    > V = volume (L)

    > n = number of moles

    > R = 8.314 (constant)

    > T = temperature (K)

The given values all have to due with the conditions fo F₂. You have been given values for all of the variables but moles F₂. Therefore, to find moles F₂, plug each of the values into the Ideal Gas Law equation and simplify.

(1.50 atm)(15.0 L) = n(8.314)(280. K)

2250 = n(2327.92)

0.967 moles F₂ = n

Using the Ideal Gas Law, we determined that the moles of F₂ is 0.967 moles. Now, to find the mass of NaCl that can react with F₂, you need to (1) convert moles F₂ to moles NaCl (via the mole-to-mole ratio using the reaction coefficients) and then (2) convert moles NaCl to grams NaCl (via molar mass from periodic table). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator).

1 F₂ + 2 NaCl ---> Cl₂ + 2NaF

Molar Mass (NaCl): 22.99 g/mol + 35.45 g/mol

Molar Mass (NaCl): 58.44 g/mol

0.967 moles F₂        2 moles NaCl             58.44 g
----------------------  x  -----------------------  x  -----------------------  =  113 g NaCl
                                     1 mole F₂              1 mole NaCl

What is the chemical formula for acetic acid?

Answers

CH3COOH

Explanation:

hope I helped

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An atom is determined to contain 13 protons 10 electrons and 12 neutrons what are the mass number and charge of this atom or ion
Mass number 24 charge +2
Mass number 22 charge neutral
Mass number 34 charge -2
Mass number 34 charge +2

Answers

The mass number and charge of this atom or ion is 24  and charge +2

What is mass number ?

The mass number is equals to the total number of protons and neutrons in a nucleus.

In the give question, The number of neutrons is a distractor.

Only the number of electrons versus the number of protons determines ionic charge. The charge of the ion is +2

Hence, The mass number and charge of this atom or ion is 24  and charge +2

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Ordinary water boils at 100°C. Can it be made to boil at 95°C or 105°C.​

Answers

It can be done. Normally the boiling point of water is 100°C. It will boil at temperature greater than 100°C more quickly. Water can be boiled at 95°C but for that the atmospheric pressure of the water should be decreased which will decrease the boiling point of water.

Concept :

To boil water at 95°C, decrease the atmospheric pressure.

At 105°C, the water will be boiling quickly than normal at 100°C.

The best way is add alcohol .

The common way is that decrease the atmospheric pressure .

This will work as per Boyles law ,and boiling point can be decreased.

but it has few restrictions

You can't decrease pressure simply at normal conditionsFor decreasing pressure you have to go hill tops .

Hence there is a spare way

Add alcohol

General alcohols like ethanol,butanol can decrease the boiling point of water

How can you use quantitative chemistry and reaction dynamics to explain and optimize industrial processes and reactions that happen in everyday life?

Answers

The quantitative chemistry is helps in measuring the quantity of chemicals or chemical agents of food while making some dish or cleaning agent. It also helps in determining the quantity of macromolecules in the body, like protein, lipid, etc.

What is quantitative chemistry?

Quantitative chemistry is a branch which tells the quantity  of substances, chemicals. The mass, volume etc. It also helps in determining the molecules and toxic level in the body.

Thus, the quantitative chemistry is helps in measuring the quantity of chemicals or chemical agents of food while making some dish or cleaning agent. It also helps in determining the quantity of macromolecules in the body, like protein, lipid, etc.

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