12 . A hydrocarbon (which by definition contains only C and H atoms) is heated in an excess of
oxygen to produce 58.67 g of CO 2 and 27 g of H 2 O. What is the empirical formula of the
hydrocarbon?
13 . Balance the following reactions:
(A) I 2 + Cl 2 + H 2 O → HIO 3 + HCl
(B) MnO 2 + HCl → H 2 O + MnCl 2 + Cl 2
(C) BCl 3 + P 4 + H 2 → BP + HCl
(D) C 3 H 5 (NO 3 ) 3 → CO 2 + H 2 O + N 2 + O 2
(E) HCl + Ba(OH) 2 → BaCl 2 + H 2 O