Ta có:m(rượu+nước)= 200 x 0,8= 160(g)
m(rượu tinh khiết)= \(\dfrac{160.36,8}{100}=58,58\left(g\right)\)
\(\Rightarrow n_{C_2H_5OH\left(TT\right)}=\dfrac{58,88}{46}=1,28\left(mol\right)\)
\(n_{C_6H_{12}O_6}=\dfrac{138,24}{180}=0,768\left(mol\right)\)
\(PTHH:C_6H_{12}O_6\xrightarrow[30-35^o]{menrượu}2C_2H_5OH+2CO_2\)
Mol: 0,768 1,536
\(\Rightarrow H=\dfrac{1,28.100}{1,536}=83,3\%\)