1.
H2SO4+Fe-->FeSO4+H2
2K+2H2O-->2KOH+H2
H2+CL2-->2HCL
2.
дано
n(HCL) = 0.5 mol
----------------------
V(HCL) -?
V(HCL) = n(HCL)*Vm = 0.5*22.4 = 11.2 L
ответ 11.2 л
3.
Ca3(PO4)2 , BaCO3 , ZnCL2 , Mg(NO3)2 , Al2S3
4.
дано
V(H2) = 4.48 L
---------------------
m(Na)-?
x 4.48
2Na+2H2O-->2NaOH+H2 M(Na) = 23 g/mol ,Vm = 22.4 L/mol
2*23 22.4
X = 46*4.48 / 22.4 = 9.2 g
ответ 9.2 г
5.
дано
W(H2) = 17.64%
----------------------
NHx-?
W(H2) = Ag(H)*n/ M(NHx) * 100%
17.64% = 1X / (14+1X) * 100%
17.64 * 14 + 17.94*1X = 100X
246 + 17.94X = 100X
X = 3
NH3
W(H2) = 1*3 / 17 * 100% = 17.64%
ответ аммиак
6.
2Na+2H2O-->2NaOH+H2
MgO+2HNO3-->Mg(NO3)2+H2O
2Al+3H2SO4-->Al2(SO4)3+3H2
3Mg+AlCL3-->3MgCL+Al