a)
a) Ta có: \(Độ.rượu=\dfrac{V_{rượu}}{125}.100=80^o\)
=> Vrượu = 100 (ml)
=> mrượu = 100.0,8 = 80 (g)
b)
\(n_{C_2H_5OH}=\dfrac{80}{46}=\dfrac{40}{23}\left(mol\right)\)
PTHH: \(C_2H_5OH+O_2\underrightarrow{men.giấm}CH_3COOH+H_2O\)
=> \(n_{CH_3COOH}=\dfrac{40}{23}\left(mol\right)\)
=> \(m_{CH_3COOH}=\dfrac{40}{23}.60=\dfrac{2400}{23}\left(g\right)\)
=> \(m_{dd.CH_3COOH.3\%}=\dfrac{\dfrac{2400}{23}.100}{3}=\dfrac{80000}{23}\left(g\right)\)