Chemistry path · GCSE Chemistry

Can you keep the mole ratio the right way round?

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Practice question

Ammonia decomposes: $2\mathrm{NH_3} \rightarrow \mathrm{N_2} + 3\mathrm{H_2}$ . Calculate the mass of hydrogen made from $25.0\,\mathrm{g}$ of ammonia. $M_r(\mathrm{NH_3}) = 17$ and $M_r(\mathrm{H_2}) = 2$ .

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Official curriculum

Amounts of substances in equations (HT only)

This challenge practises knowledge and exam skills from the official GCSE science curriculum. Use these sources to see the exact subject content and its wider Key Stage 4 context.

AQA specification Amounts of substances in equations (HT only) GOV.UK Key Stage 4 science programme

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