дано
CnH2n+1OH
D(O2) = 1.875
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CnH2n+1OH-?
M(CnH2n+1OH) = D(O2) * 32 = 1.875 * 32 = 60 g/mol
M(CnH2n+1OH) = (14n+18)g/mol
14n+18 = 60
14n = 60-18
14n = 42
n = 3
C3H7OH
M(C3H7OH) = 12*3+1*7+16+1 = 60 g/mol
ответ : ПРОПИЛОВЫЙ СПИРТ