Question

Find the ratio of mass of the combining elements in the following compounds: (a) CaCO3 (b) MgCl2 (c) H2SO4 (d) C2H5OH (e) NH3 (f) Ca(OH)2

June 30, 2024

Answer

(a) CaCO₃

Ca : C : O × 3

40 : 12 : 16 x 3

40 : 12 : 48

10 : 3 : 12

(b) MgCl₂

Mg : Cl × 2

24 : 35.5 x 2

24 : 71

(c) H₂SO₄

H × 2 : S : O × 4

1 × 2 : 32 : 16 × 4

2 : 32 : 64

1 : 16 : 32

(d) C₂H₅OH

C × 2 : H × 6 : O

12 × 2 : 1 × 6 : 16

24 : 6 : 16

12 : 3 : 8

(e) NH₃

N : H x 3

14 : 1 x 3

14 : 3

(f) Ca(OH)₂

Ca : O × 2 : H × 2

40 : 16 × 2 : 1 × 2

40 : 32 : 2

20 : 16 : 1

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