Дано
V(CO2)=11.2L
mppaBa(OH)2=900 g
W=10%
--------------------------
m(BaCO3)-?
m(Ba(OH)2)=900*10%/100%=90 g
90 11.2 X
Ba(OH)2+CO2-->BaCO3+H2O
171 22.4 197
M(Ba(OH)2)=171 g/mol
Vm=22.4 L/mol
M(BaCO3)=197 g/mol
n(Ba(OH)2)=m/M=90/171=0.53 mol
n(CO2)=V/Vm=11.2/22.4=0.5 mol
n(Ba(OH)2)>n(CO2)
11.2/22.4 = X/197
X=98.5 g
ответ 98.5 г