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 3

A pure sample of copper nitrate is heated until it has completely decomposed.

2Cu(NO3)2→2CuO+4NO2+O22\text{Cu(NO}_3\text{)}_2 \rightarrow 2\text{CuO} + 4\text{NO}_2 + \text{O}_22Cu(NO3​)2​→2CuO+4NO2​+O2​

Relative atomic masses (ArA_rAr​): N=14\text{N} = 14N=14, O=16\text{O} = 16O=16, Cu=64\text{Cu} = 64Cu=64

Calculate the mass of oxygen produced when 18.8 g of copper nitrate completely decomposes.

[4]
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.

More questions