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дано

W(C) = 92.3 % = 0.923

M(CxHy) = 78 g/mol

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CxHy-?

W(H) = 1-0.923 = 0.077

CxHy / 78 = 0.923 / 12 : 0.077 / 1

CxHy = 6 : 6

C6H6

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