A compound has a molar mass of 90. grams per mole and the empirical formula CH2O. What is the molecular formula of this compound?
(1) CH2O (3) C3H6O3
(2) C2H4O2 (4) C4H8O4
(1) CH2O (3) C3H6O3
(2) C2H4O2 (4) C4H8O4