Question

When 0.200g of compound A, which contains only carbon and hydrogen, was burned completely in a stream of dry oxygen, 0,629g of carbon dioxide and 0.257g of water was formed. Find the empirical formula of the compound. Please help with explanation if possible

Answer 1

Since we know the compound A has carbon and hydrogen then we must find the grams of both carbon and hydrogen by using the given grams of CO2 and H2O.
Find the grams of carbon by using the given grams of CO2
Find the grams of hydrogen by using the given grams of H2O

Afterwards, take the grams of C and H and find their moles separately. After you get the moles for bothelements, one of them will be the smallest. Take the smallest number and divide by each element which means one of the elements will have a ration of 1.

\(\LARGE C_{\frac{Moles}{smallest ~moles}} H_{\frac{Moles}{smallest ~moles}} \)