Skip to content

Course home

Question bank·3.2 Use of amount of substance in relation to masses of pure substances
Sign up

3.2 Use of amount of substance in relation to masses of pure substances

EasyMediumHard
12345678910111213141516171819202122232425262728293031323334353637383940414243
Question 5

Ethene undergoes complete combustion.

C2H4+3O2→2CO2+2H2O\text{C}_2\text{H}_4 + 3\text{O}_2 \rightarrow 2\text{CO}_2 + 2\text{H}_2\text{O}C2​H4​+3O2​→2CO2​+2H2​O

Relative atomic masses (ArA_rAr​): H=1\text{H} = 1H=1, C=12\text{C} = 12C=12, O=16\text{O} = 16O=16

a.

Calculate Mr M_r\,Mr​ for ethene, C2H4\text{C}_2\text{H}_4C2​H4​.

[1]
b.

A sample of 42 g of ethene burns completely.

Calculate the mass of carbon dioxide formed.

[3]
Markscheme

3.2 Use of amount of substance in relation to masses of pure substances Questions

  1. GCSE
  2. /Chemistry
  3. /3.2 Use of amount of substance in relation to masses of pure substances

131 exam-style questions on AQA GCSE Chemistry 3.2 Use of amount of substance in relation to masses of pure substances, covering 3.2.1 Moles, 3.2.2 Amounts of substances in equations, 3.2.3 Using moles to balance equations, 3.2.4 Limiting reactants, 3.2.5a Concentration of solutions, and 3.2.5b Relating mass, volume and concentration. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank