$pthh:$
$CH4 + 2O2 → CO2 + 2H2O$
$ nCH4=4,48/22,4=0,2mol$
$a/$
$theo$ $pt :$
$nO2=2nCH4=2.0,2=0,4mol$
$⇒V_{O_{2}}=0,4.22,4=8,96$
$⇒V_{kk}=8,96.5=44,8l$
$b/$
$theo$ $pt :$
$nCO2=nCH4=0,2 mol $
$⇒mCO2=0,2.44=8,8g$
$nH2O=2nCH4=2.0,2=0,4mol$
$⇒mH2O=0,4.18=7,2g$
$B/$
$pthh:$
$C+O2→CO2$
$nC=3,6/12=0,3mol$
$⇒nO2=0,3mol$
$Pthh:$
$2KClO3→2KCl+3O2$
$theo$ $pt :$
$nKClO3=2/3.nO2=2/3.0,3=0,2mol$
$⇒mKClO3=0,2.122,5=24,5g$