What is the molar mass of H2CO3? (Molar mass of H = 1.0079 g/mol; C = 12.010 g/mol; O = 15.999 g/mol)

A. 29.02 g/mol

B. 46.04 g/mol

C. 62.02 g/mol

D. 72.08 g/mol

The molar mass is 62.03 g/mol

You have to multiply the molar mass of each element by the number of atoms there are in the compound and then add each element's molar mass in the compound.

There are 2 Hydrogen atoms, one carbon atom and 3 oxygen atoms

H = 2 (1.0079 g/mol) = 2.0158 g/mol

C = 12.010 g/mol

O = 3 (15.999g/mol) = 47.997 g/mol

H2CO3 = (2.0158+12.010+47.997) g/mol = 62.02

The molar mass of H2CO3 is C. 62.02 g/mol