Find the ratio by mass of the combining elements in the following compounds.
a) `CaCO_(3)`
b) `MgCl_(2)`
c) `H_(2)SO_(4)`, d) `C_(2)H_(5)OH`
e) `NH_(3)`, f) `Ca(OH)_(2)`

Explanation

a) `CaCO_(3) to Ca: C:O=40:12:48 = 10:3:12`
b) `MgCl_(2) to Mg: Cl=24, 2 xx 35.5 =24:71`
c) `H_(2)SO_(4) to H:S:O = 2 xx 1:32:4 xx 16 =2:32:64=1:16:32`
d) `C_(2)H_(5)OH to C:H:O=2 xx 12 : 6 xx 1: 16=24 : 6:16=12:3:8`
e) `NH_(3) to N:H=14 : 3 xx 1=14:3`
f) `Ca(OH)_(2) to Ca : O: H = 40:2 xx 16 : 2 xx 1=40:32:2=20:16:1`