P/100=mpura/mimpura si randament/100=cantitatepractica/cantitateteoretica
64/100=mpura/1000g => mpura=640kg
64g....................1mol
CaC2 + H2O -> C2H2 + CaO
640kg................x=10moli
60/100=cantitatepractica/10 => cantitatepractica=6moli
T=t+273=27+273=300K
pV=nRT
2V=6*0,082*300
V=3*0,082*300=8,2*9=73,8L acetilena