Ответ:
дано
m(ppa CH3COOH) = 120 g
W(CH3COOH) = 20%
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m(CH3COOCH3)-?
m(CH3COOH) = 120 * 20% / 100% = 24 g
CH3COOH+CH3OH-->CH3COOCH3+H2O
M(CH3COOH) = 60 g/mol
n(CH3COOH) = m/M = 24 / 60 = 0.4 mol
n(CH3COOH) = n(CH3COOCH3) = 0.4 mol
M(CH3COOCH3) = 74 g/mol
m(CH3COOCH3) = n*M = 0.4 * 74 = 29.6 g
ответ 29.6 г
Объяснение: