Which equation for the complete combustion of ethane is balanced?
2C2H6+5O2→4CO2+6H2O2\text{C}_2\text{H}_6 + 5\text{O}_2 \rightarrow 4\text{CO}_2 + 6\text{H}_2\text{O}2C2H6+5O2→4CO2+6H2O
C2H6+3O2→2CO2+3H2O\text{C}_2\text{H}_6 + 3\text{O}_2 \rightarrow 2\text{CO}_2 + 3\text{H}_2\text{O}C2H6+3O2→2CO2+3H2O
2C2H6+7O2→4CO2+6H2O2\text{C}_2\text{H}_6 + 7\text{O}_2 \rightarrow 4\text{CO}_2 + 6\text{H}_2\text{O}2C2H6+7O2→4CO2+6H2O
C2H6+4O2→2CO2+3H2O\text{C}_2\text{H}_6 + 4\text{O}_2 \rightarrow 2\text{CO}_2 + 3\text{H}_2\text{O}C2H6+4O2→2CO2+3H2O
40 exam-style questions on AQA GCSE Chemistry 7.1 Carbon compounds as fuels and feedstock, covering 7.1.1 Crude oil, hydrocarbons and alkanes, 7.1.2 Fractional distillation and petrochemicals, 7.1.3 Properties of hydrocarbons, and 7.1.4 Cracking and alkenes. Each one has a worked solution and a mark scheme showing where the marks go.