Răspuns:
C+2H2SO4-->>CO2+2SO2+2H2O
2 moli H2SO4.........................1mol CO2
x l .................................................89,6 l
x=179,2l
V/Vm=niu=8 moli
niu=m/M=784g
1x 12g...........................................2*98g
y=48g..................................................784g
48g..........................................90%pur
100g...........................................x=43,2 pur
Explicație: