The analysis of a hydrocarbon revealed that it was 85.6281% C and ... What is themolecular formula of the hydrocarbon? a) C4H8 b) C7H14 c) C6H12 d) C3H5 e) C3H8 f) ... or a C:H ratio of 2:3 The hydrocarbon has the formula C2xH3x. .... Generally, hydrocarbons of low molecular weight, e.g., methane, ..