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3.5 Use of amount of substance in relation to volumes of gases

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Question 16
H

Four samples of gas are measured at room temperature and pressure.

Which sample contains the greatest number of molecules?

Table: The relative formula masses of the four gases in the samples

GasRelative formula mass
Helium, He\text{He}He4
Oxygen, O2\text{O}_2O2​32
Carbon dioxide, CO2\text{CO}_2CO2​44
Hydrogen, H2\text{H}_2H2​2
[1]
A

4.0 g4.0\ \text{g}4.0 g of helium, He\text{He}He

B

8.0 g8.0\ \text{g}8.0 g of oxygen, O2\text{O}_2O2​

C

11 g11\ \text{g}11 g of carbon dioxide, CO2\text{CO}_2CO2​

D

3.0 g3.0\ \text{g}3.0 g of hydrogen, H2\text{H}_2H2​

Markscheme

3.5 Use of amount of substance in relation to volumes of gases Questions

  1. GCSE
  2. /Chemistry
  3. /3.5 Use of amount of substance in relation to volumes of gases

40 exam-style questions on AQA GCSE Chemistry 3.5 Use of amount of substance in relation to volumes of gases, covering 3.5.1 Volumes of gases. Each one has a worked solution and a mark scheme showing where the marks go.

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