Question

Calculate the mass of 1 mole of each one of the following- (5)

a) NaCl

b) CaCO3

c) Na2O2

d) C2H6O

e) H2O​

Answer 1

Explanation:

a) NaCl => [Na] + [Cl]

23 + 35.5 = 58.5 g

b) CaCO3 => [Ca] + [C] + 3 ×[O]

40 + 12 + 3×16

40 + 12 + 48 = 100 g

c) Na2O2 => 2 × [Na] + 2 × [O]

2×23 + 2×16

46 + 32 = 78 g

d) C2H6O => 2× [C] + 6× [H] + [O]

2 ×12 + 6×1 + 16

24 + 6 + 16 = 46 g

e) H2O => 2× [H] + [O]

2×1 + 16

2 + 16 = 18 g