Răspuns:
M,CaC2= 64g/mol
niu=m/M=200g/64g/mol=3,125molCaC2 impur
V,acetilena= 56l
niu=V/Vm=56 l/22,4 l/mol= 2,5 mol acetilena
ecuatia chimica, cu substante pure
1mol...........................1mol
CaC2 + H2O-----> C2H2+ CaO
x..................................2,5mol
x=niu carbid pur= 2,5mol
p= n,px100/n,i= 2,5x100/3,125=80%
Explicație: