Ta có:m(rượu+nước)= 150 x 0,8= 120(g)
m(rượu tinh khiết)= 120 x 34,5:100=41,4 (g)
=> \(n_{C_2H_5OH\left(tt\right)}=\dfrac{41,4}{46}=0,9\left(mol\right)\)
\(n_{C_6H_{12}O_6}=\dfrac{162}{180}=0,9\left(mol\right)\)
\(PTHH:C_6H_{12}O_6\xrightarrow[30-35^o]{menrượu}2CO_2+2C_2H_5OH\)
\(n_{C_2H_5OH\left(LT\right)}=0,9.2=1,8\left(mol\right)\)
\(\Rightarrow H=\dfrac{0,9.100}{1,8}=50\%\)