Free Printable Gas Laws and Density

Worksheets

Gas Laws and Density

Total questions: 22

Worksheet time: 1hrs 16mins

Name

Class

Date

Choose ALL of the answers that are units of pressure

kPa

atm

mm Hg

What is -5 ^oC in Kelvin?

268

278

100

Which law is used to find the moles of gas in a sample?

Charles Law

Boyle's Law

Combined Gas Law

Ideal Gas Law

Which diagram best shows the end result of diffusion?

The picture is an example of _________________.

active transport

diffusion

osmosis

effusion

Diffusion is the movement of molecules from an area of _____ concentration to an area of ______ concentration

High, low

Low, high

Low, low,

High, high

Find the density of Neon gas at .725 atm and 25°C

.35 g/L

.47 g/L

.60 g/L

.79 g/L

At 250. K and 1.75 atm, a gas has a mass of 15.3 g and occupies 5.60 L. What is the molar mass of the gas?

32.04 g/mol

42.15 g/mol

48.91 g/mol

54.28 g/mol

An unknown gas diffuses 0.25 times that of Helium. What is the molar mass of the unknown gas?

1 g/mol

64 g/mol

24 g /mol

16 g/mol

10.

What is the rate of diffusion of Oxygen and Ammonia gas (NH₃)? Which diffuses faster?

Ammonia 1.37 times faster than Oxygen

Oxygen 1.37 times faster than Ammonia

Ammonia 0.83 times faster than Oxygen

Oxygen 3 times faster than Ammonia

11.

What volume of hydrogen will be produced at STP by the reaction of 67.3 g of magnesium with excess water according to the following reaction?

1Mg + 2H₂O --> Mg(OH)₂ + H₂

62.1 L

65.0 L

31.4 L

124 L

12.

How do you convert a number in grams to moles

multiply by the Molar Mass

divide by the Molar Mass

multiply by Avogadro's number

divide by Avogadro's number

13.

Mg₃N_2(s) + 3H₂O_(l) ––> 3 MgO + 2NH_3(g)

If 10.3 g of magnesium nitride is used, what volume of ammonia gas would be collected at 20.0˚C and 0.989 atm?

27.1 L

4.96 L

0.204 L

10.3 L

14.

What is the molar volume of an ideal gas at STP?

1 mol = 22.4 L

1 mol = 0.0821 L

1 mol = 1 L

1 mol = 273 L

15.

What is the volume of 2 moles of gas at STP?

22.4 L

44.8 L

11.2 L

2 L

16.

2Al + 6HCl --> 2AlCl₃ + 3H₂

Aluminium reacts with hydrochloric acid. How many grams of aluminum are necessary to produce 11 L of hydrogen gas at STP?

13 g

8.8 g

0.99 g

1.0 g

17.

2NaN₃ → 2Na + 3N₂

At what pressure(atm) is the nitrogen gas sample that is collected when 48.4 g of NaN₃ decomposes? The temperature of the gas is 25.0°C and the volume is 18.4 L.

151 atm

1130 atm

0.125 atm

1.48 atm

18.

A 15.50 gram sample of a gas exerts a pressure of 1.40 atmospheres when held in an 8.00 liter at 22 °C. What is the molar mass (grams/mol) of the gas?

33.5 g/mol

0.0298 g/mol

6.57 g/mol

62.2 g/mol

19.

If you collect 22.4 L of oxygen (O₂) at standard temperature and pressure, you will have ____.

1 mole of gas

6.02 x 10²³ molecules of gas

32 g of gas

All of these answers

20.

Grahams law is used to calculate

how fast a chemical reaction will take place

the average kinetic energy of the molecules

both the rate of diffusion and effusion of gases

the partial and total pressures of gases in a sample.

21.

Hydrochloric acid gas(36g/mol), Ammonia gas(18g/mol), Carbon dioxide(44g/mol) : Arrange these gases from FASTEST to SLOWEST gas diffusibility.

Ammonia gas - Carbon dioxide gas- Hydrochloric acid gas

Hydrochloric acid gas - carbon dioxide gas- Ammonia gas

Ammonia gas - Hydrochloric acid gas - Carbon dioxide

Hydrochloric acid gas- Ammonia gas- Carbon dioxide gas

22.

Oxygen gas (O₂) is in a container at a pressure of 1.33 atm and 22.1 ^oC. What is the density of the gas?

0.878 g/L

5730 g/L

1.76 g/L

57.3 g/L

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Gas Laws and Density

Total questions: 22

Worksheet time: 1hrs 16mins

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