posted by Stephanie on .
Complete combustion of 7.00 g of a hydrocarbon produced 21.4 g of CO2 and 10.2 g of H2O. What is the empirical formula for the hydrocarbon?
Convert 21.4g CO2 to g C and subtract that number from 7.00 g to find g H.
mols C = g/atomic mass
mols H = g/atomic mass
Then find the ratio of the elements to each other. Post your work if you get stuck.