Skip to content

Course home

Question bank·2.6 Calculations involving masses
Sign up

2.6 Calculations involving masses

EasyMediumHard
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051
Question 16

Calcium reacts with nitrogen to form ionic calcium nitride.

3Ca+N2→Ca3N23\mathrm{Ca} + \mathrm{N_{2}} \rightarrow \mathrm{Ca_{3}N_{2}}3Ca+N2​→Ca3​N2​

A 2.80 g sample of nitrogen reacts completely with excess calcium.

Relative atomic mass: N=14\mathrm{N} = 14N=14.

The Avogadro constant is 6.02×1023 mol−16.02\times10^{23}\,\mathrm{mol^{-1}}6.02×1023mol−1.

Calculate the total number of ions in the calcium nitride formed.

[4]
Markscheme

2.6 Calculations involving masses Questions

  1. GCSE
  2. /Chemistry
  3. /2.6 Calculations involving masses

142 exam-style questions on Edexcel GCSE Chemistry 2.6 Calculations involving masses, covering 2.6.1 Relative formula mass and percentage composition, 2.6.2 Empirical and molecular formulae, 2.6.3 Conservation of mass, 2.6.4 Reacting masses and concentration in g dm⁻³, 2.6.5 The mole and the Avogadro constant, and 2.6.6 Limiting reactants and stoichiometry. Each one has a worked solution and a mark scheme showing where the marks go.

More questions