AQA GCSE Chemistry

Topic Questions

3.5 Amount of Substance & Gas Volume

1
Sme Calculator
1 mark

What is the volume occupied by 5.6 g of nitrogen gas at RTP?

Relative atomic masses (Ar): N= 14

  • 2.4 dm3

  • 4.8 dm3

  • 9.6 dm3

  • 12 dm3

Did this page help you?

2
Sme Calculator
1 mark

The reaction between nitrogen and hydrogen produces ammonia.

N2 (g) + 3H2 (g) begin mathsize 14px style rightwards harpoon over leftwards harpoon end style  2NH3 (g)

What volume of ammonia is produced from 565 cm3 of hydrogen?

  • 1130 cm3

  • 377 cm3

  • 283 cm3

  • 847 cm3

Did this page help you?

3
Sme Calculator
1 mark

Air bags contain sodium azide (NaN3) which decomposes on heating to form sodium and nitrogen.

2NaN3       →       2Na       +       3N2

What volume of nitrogen would be produced from 13 g of sodium azide?

Relative atomic mass (Ar): N = 14

Relative formula mass (Mr): NaN3 = 65

  • 4.8 dm3

  • 7.2 dm3

  • 48 dm3

  • 72 dm3

Did this page help you?

4
Sme Calculator
1 mark

A gas cylinder has a volume of 264 dm3.   

What mass of hydrogen does it contain?

Relative atomic masses (Ar): H=1

  • 22 g

  • 11 g

  • 24 g

  • 264 g

Did this page help you?

5
Sme Calculator
1 mark

Hydrogen can be produced by reacting methane with steam: 

CH4 + H2O  → CO + 3H2

What volume would the products occupy at RTP after reacting 32 g of methane with excess steam?  

Relative atomic masses (Ar):  C = 12    H = 1    O = 16

  • 24 dm3

  • 72 dm3

  • 96 dm3

  • 192 dm3

Did this page help you?