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Briefly answer the following question:
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). NH_3 = N:H x 3 = 14:1 x 3 = .
(b). CO = C:O = 12:16 = .
(c). HCl = H:Cl = 1:35.5 = .
(d). AlF_3 = Al:F x 3 = 27:19 x 3 = .
(e). MgS = Mg:S = 24:32 = .
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