Calculating empirical formula of vitamin C Combustion of 0.2000 g of vitamin C gives 0.2998 g $\ce{CO2}$ and 0.819 g of water. What is the empirical formula of vitamin C?

My work:

I calculated moles of products and found the mole ratio but it's not coming to be a whole number.
You are using the wrong number for the grams of water, it should be 0.0819.  Go back and redo your calculations with that change.  Now you should get the correct ratio of the elements in the molecular formula for ascorbic acid.  If you don't, report back and show your math.