Alkanes are saturated hydrocarbons that burn completely in oxygen to produce carbon dioxide and water. Heptane, C7H16\text{C}_7\text{H}_{16}C7H16, is a standard reference fuel used in the determination of octane ratings.
Balance the equation for the complete combustion of heptane:
C7H16+………O2→………CO2+………H2O \text{C}_7\text{H}_{16} + \dots\dots\dots \text{O}_2 \rightarrow \dots\dots\dots \text{CO}_2 + \dots\dots\dots \text{H}_2\text{O} C7H16+………O2→………CO2+………H2O230 exam-style questions on Edexcel GCSE Chemistry 1.1 Formulae, equations and hazards, covering 1.1.1 Formulae, word and balanced equations, 1.1.2 Balanced ionic equations, and 1.1.3 Hazard symbols and risk in practical work. Each one has a worked solution and a mark scheme showing where the marks go.