Gas Laws and Molar Mass Concepts

Gas Laws and Molar Mass Concepts

Assessment

Interactive Video

Chemistry, Science

9th - 12th Grade

Hard

Created by

Emma Peterson

FREE Resource

This video tutorial focuses on calculating the density and molar mass of gases using the ideal gas law. It covers deriving formulas for density at standard temperature and pressure (STP) and non-STP conditions, using dimensional analysis and unit conversion. The tutorial includes step-by-step calculations for nitrogen gas density at STP and non-STP, and methods to find molar mass from given density. It also presents alternative approaches to calculate molar mass using density at STP.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molar mass of nitrogen gas (N2)?

44.01 g/mol

28.02 g/mol

14.01 g/mol

32.00 g/mol

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

At STP, what volume does one mole of gas occupy?

20.0 liters

24.0 liters

22.4 liters

18.0 liters

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which equation is used to derive the formula for gas density?

Ideal Gas Law

Charles's Law

Boyle's Law

Avogadro's Law

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for density derived from the ideal gas law?

Density = Pressure / (R * Temperature)

Density = Molar Mass / Volume

Density = (Pressure * Molar Mass) / (R * Temperature)

Density = (R * Temperature) / Pressure

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you convert pressure from torr to atm?

Multiply by 760

Divide by 760

Multiply by 101.3

Divide by 101.3

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the density of nitrogen gas at 25°C and 872 torr?

1.25 g/L

1.47 g/L

1.31 g/L

1.50 g/L

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molar mass of a gas if a 14.5 g sample occupies 3 liters at 300 K and 650 mmHg?

120.5 g/mol

150.0 g/mol

139.1 g/mol

130.2 g/mol

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