$n_{CO_2}=3,36/22,4=0,15mol$
$PTHH :$
$C_2H_5OH+3O_2\overset{t^o}\to 2CO_2+3H_2O$
$\text{a/Theo pt :}$
$n_{O_2}=3/2.n_{CO_2}=3/2.0,15=0,225mol$
$⇒V_{O_2}=0,225.22,4=5,04l$
$b/V_{kk}=5.5,04=25,2g$
$\text{c/Theo pt :}$
$n_{C_2H_5OH}=1/2.n_{CO_2}=1/2.0,15=0,075mool$
$⇒a=m_{C_2H_5OH}=0,075.46=3,45g$