Question
If ten volumes of dihydrogen gas react with five volumes of dioxygen gas, how many volumes of water vapour could be produced?
Solution
Dihydrogen and dioxgen react to form water.
2 volumes of H2 react with 1 volume of O2 to produce 2 volumes of water vapours.
∴ 10 volumes of H2 react with 5 volumes of O2 to produce 10 volumes of water vapours.
