V=n×Vm (Vm=22,4л\моль)
N=n×Na
(Na=6×10 в 23 степени)
m=n×M
1-4, 2-4, 3-3, 4-3, 5-3, 6-1, 7-1, 8-1, 9-1, 10-3
H2+H2O=
2H2+O2=2H2O
H2+N2a=2NAH
H2+H2=
H2+CuO=CU+ H2O
H2+CaO=CA +H2O
S+H2O=SO2 +H2
S+O2=SO2
S+Na=NA2S
S+H2=SH2
2S+2CuO=2CU+SO2
S+2CaO=2CA + SO2
Ca3N2+6H2O=3Ca(OH)2+2NH3
n(NH3)=V/Vm=7.6/22.4=0.34 моль
n(Ca3N2)=n(NH3)/2=0.34/2=0.17 моль
m(Ca3N2)=n*M=0.17*148=25.16 г
Ответ: 25.16 г
2) H2SO4 + BaCl2 -> BaSO4 + 2HCl
2H(+)+SO4(-2)+Ba(+2)+2Cl(-) -> BaSO4 + 2H(+)+2Cl(-)
Ba(+2)+SO4(-2) -> BaSo4