Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them.

(a) Ammonia


(b) Carbon monoxide


(c) Hydrogen chloride


(d) Aluminum fluoride

(a) Ammonia - NH3


N: H × 3 = 14: 1 × 3 = 14:3


(b) Carbon monoxide - CO


C : O = 12:16 = 3:4


(c) Hydrogen chloride- HCl


1: 35.5 = 2:71


(e) Aluminum fluoride- AlF3


Al : F × 3 = Al : F× 3 = 27: 19 × 3 = 9 : 19


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