Question

Calculate the formula mass of the compounds whose formulae are given below:
a) CaCO3 b) Al2O3

Answer 1

Answer:

molecular mass of

a) CaCO3 = 40+12+3(16) = 100

b) Al2O3 = 2(27) +3(16) = 102

Answer 2

Explanation.

(a) 40+12+16×3= 100

(b) 27×2+16×3= 102