A compound has an empirical formula of CHBr2. If it's molar mass is 345.6 grams, what is it's molecular formula

The molecular formula is C2H2Br4

Explanation:

Molar Mass of CHBr2 = 12 + 1 + (2x80) = 12 + 1 + 160 = 173

The molecular formula = n x empirical formula

Molar Mass of the compound = 345.6

Empirical formula = CHBr2

n (CHBr2) = 345.6

n x 173 = 345.6

n = 345.6/173 = 2

Therefore the molecular formula is n (CHBr2) = 2 (CHBr2) = C2H2Br4