Calculate the percentage of underlined elements in the following compounds [ 1) NO [N = 40=16
CH4 [C=12, H=1)
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Calculate the molecular masses of the following compounds :(a) Methane , CH4 (b) Ethane , C2H6 (c) Ethene , C2H4 (d) Ethyne , C2H2 (Atomic masses : C
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(a) Molecular mass of methane , (CCH4 )=12+4=16u
(b) Molecular mass of ethane , (C2H4 )=2×12+6×1=30u
(c) Molecular mass of ethene , (C 2 H4 )=2×12+4×1=28u
(
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