1)-3
2)-2
3)-3
4)-2
5)-4
6)-2
7)-А(4) Б(3) В(2) Г(1)
8)- 2 3 6
9)-ХЗ
10)-
M(Mg)=24.31 г/моль
M(H2)=2.02 г/моль
n(Mg)=m(Mg)/M(Mg)=8/24.31=0.3 моль
0.3:1 = x:1
x=0.3*1/1=0.3
n(H2)=0.3
m(H2)=n(H2)*M(H2)=0.3+2.02=0.6г
V(H2) = n(H2) * V = 0.3*22.4=6.7дм^3
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Answers & Comments
1)-3
2)-2
3)-3
4)-2
5)-4
6)-2
7)-А(4) Б(3) В(2) Г(1)
8)- 2 3 6
9)-ХЗ
10)-
M(Mg)=24.31 г/моль
M(H2)=2.02 г/моль
n(Mg)=m(Mg)/M(Mg)=8/24.31=0.3 моль
0.3:1 = x:1
x=0.3*1/1=0.3
n(H2)=0.3
m(H2)=n(H2)*M(H2)=0.3+2.02=0.6г
V(H2) = n(H2) * V = 0.3*22.4=6.7дм^3