How do you get the H2 ,O3 ,CO ,NH3 ,N2O4 ,C4H10 formula mass ?

1.	How do you get the H2 ,O3 ,CO ,NH3 ,N2O4 ,C4H10 formula mass ?
Answer» WATER 2.i don't KNOW 3.carbonand OXYGEN 4.a mmonia 5.i DOT know and 6 .

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