CHARMELOLARTEid CHARMELOLARTEid Science Answered A compound contains, by mass,40.0%, carbon, 6.71%, hydrogen, and 53.3% oxygen. A 0.320 mole sample of this compound weighs 28.8 g. The molecular formula of this compound is: A. C2H402B. C3H603C.C2H40D.CH20