Write the formulae for the following and calculate the molecular mass for each one of them.
(a) Caustic potash
Ans. KOH
(39 + 16 + 1) = 56 g mol-1
(b) Baking powder
Ans. NaHCO3
23 + 1 + 12 + (3 × 16) = 84 g mol-1
(c) Lime stone
Ans. CaCO3
40 + 12 + (3 × 16) = 100 g mol-1
(d) Caustic soda
Ans. NaOH
23 + 16 + 1 = 40 g mol-1
(e) Ethanol
Ans. C2H5OH = C2H6O
2 × 12 + (6 × 1) + 16 = 46 g mol-1
(f) Common salt
Ans. NaCI
23 + 35.5 = 58.5 g mol-1
