consider a sample of hydrocarbon(a compound consisting of only carbon and hydrogen) at .959 atm and 298K. Upon combusting the entire sample in oxygen, you collect a mixture of gaseous carbon dioxide and water vapour at 1.51 atm and 375K. This mixture has density of 1.391g/L and occupies a volume four times as that of pure hydrocarbon. Determine the molecular formula of the hydrocarbon.