a.
\(n_{C_6H_{12}O_6}=\dfrac{1000}{180}=5,55\left(mol\right)\)
\(C_6H_{12}O_6\rightarrow\left(t^o,men\right)2C_2H_5OH+2CO_2\)
5,55 --> 11,1 ( mol )
\(m_{C_2H_5OH}=11,1.46.80\%=408,48\left(g\right)\)
\(V_{C_2H_5OH}=\dfrac{408,48}{0,8}=510,6\left(ml\right)\)
b.
\(V_{C_2H_5OH_{_{30^o}}}=\dfrac{510,6.100}{30}=1720\left(ml\right)\)