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AP Chem: Stoichiometry Help?
I have an AP Chem test tomorrow and I have NO idea how to solve this problem:
A compound containing only C and H is burned completely and produces 1.481g of CO2 and 0.303g of H2O. Determine the empirical formula of the compound.
That is the only thing that the question says. I know the answer is CH, but I really need to know how to find the answer.
Thanks a lot
1 Answer
- Roger the MoleLv 79 years agoFavorite Answer
(1.481 g CO2) / (44.00964 g CO2/mol) x (1 mol C / 1 mol CO2) = 0.0336517 mol C
(0.303 g H2O) / (18.01532 g H2O/mol) x (2 mol H / 1 mol H2O) = 0.033638 mol H
Divide by the smaller number of moles:
(0.0336517 mol C) / 0.033638 = 1.00
(0.033638 mol H) / 0.033638 = 1.00
Round to the nearest whole number to find the empirical formula:
CH
