A white powder, consisting of a simple mixture of tartaric acid (C4H6O6) and citric acid (C6H8O7) was analysed to determine the elemental composition. Combustion of a 607.8-mg sample produced 800.6 mg of CO2 and 225.4 mg of H2O.
Use atomic masses: C 12.011; H 1.00794; O 15.9994.
Calculate the % carbon, by mass, in the sample.
i tried calculating the mass of carbon and dividing it by the sample but i do not get the answer...can anyone give any help?