A total of 1 l of two gaseous hydrocarbon mixtures are burned in air to produce 1.5 l CO2 and 2 l of water vapor A must contain methane B must contain methane, not ethane C must contain ethane but not methane D must be free of ethane

A total of 1 l of two gaseous hydrocarbon mixtures are burned in air to produce 1.5 l CO2 and 2 l of water vapor A must contain methane B must contain methane, not ethane C must contain ethane but not methane D must be free of ethane

Because the volume ratio = the coefficient ratio of the chemical equation, the ratio of the number of C to the number of H in 1L gas mixture is 1.5:4 (a water contains 2 h), that is, 3:8. Because it is a mixture of two hydrocarbons, an average hydrocarbon contains 1.5 C atoms