дано
m(CaCO3) = 150 g
m(HCL) = 6.3 g
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V(CO2)-?
M(CaCO3) = 100 g/mol
n(CaCO3) = m/M = 150 / 100 = 1.5 mol
M(HCL) = 36.5 g/mol
n(HCL) = m/M = 6.3 / 36.5 = 0.17 mol
n(CaCO3) > n(HCL)
CaCO3+2HCL-->CaCL2+H2O+CO2
2n(HCL) = n(CO2)
n(CO2) = 0.17 / 2 = 0.085 mol
V(CO2) = n*Vm = 0.085 * 22.4 = 1. 93 L
ответ 1.93 л