What is the ratio by mass of combining elements in H20, C02, and NH3?
H2O ratio by mass of combining elements 2 : 16 = 1 : 8 (H : O)
C02 ratio by mass of combining elements 12 : 32= 3 : 8 (C : O)
NH3 ratio by mass of combining elements 14 : 3= 14 : 3 (N : H)
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