Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (You may use appendix-III). (a) Ammonia (b) Carbon monoxide (c) Hydrogen chloride (d) Aluminium fluoride (e) Magnesium sulphide
ScienceClass 9CBSEAnswered 27 Mar 2026
Answer
Soln:
|
Sl. No. |
Compounds |
Chemical formula |
Ratio by mass of the combining elements |
|
(a) |
Ammonia |
NH3 |
N:H=14:3 |
|
(b) |
Carbon monoxide |
CO |
C:O= 12:16=3:4 |
|
(c) |
Aluminium fluoride |
HCl |
H:Cl= 1:35.5 |
|
(d) |
Aluminium fluoride |
AlF3 |
Al:F=27:57=9:19 |
|
(e) |
Magnesium sulphide |
MgS |
Mg:S= 24:32=3:4 |
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