Find the ratio by mass of the combining elements in the following compounds
(a) CaCO3
Ans. Ca: C: O3 = 40: 12: 16 × 3 = 40: 12: 48 = 10: 3: 12
(b) MgCl2
Ans. Mg: CI2 = 24: 35.55 × 2 = 24: 71
(c) H2SO4
Ans. H2: S: O4 = 1 × 2: 32: 16 × 4 = 2: 32: 64 = 1: 16: 32
(d) C2H5OH
Ans. C2: H6: O = 12 × 2: 1 × 6: 16 = 24: 6: 16 = 12: 3: 8
(e) NH3
Ans. N: H3 = 14: 1 × 3 = 14: 3
(f) Ca(OH)2
Ans. Ca: O2: H2 = 40: 16 × 2: 1 × 2 = 40: 32: 2 = 20: 16: 1
