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ohremchuk3
@ohremchuk3
July 2022
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ПОМОГИТЕ!!! ПОЖАЛУЙСТА !!!!
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DJToxa
Verified answer
10.
MgCO3--(t)->MgO+CO2
MgO+C-->Mg+CO
11.
2Na+2H2O-->2NaOH+H2
4Na+O2-->2Na2O
2Na+S-->Na2S
12.
Дано:
m(смеси)=4г
V(H2)=2.24л
Найти:
w(Ag)-?
w(Mg)-?
Решение:
Mg+H2SO4=MgSO4+H2
n(H2)=n(Mg)=V/Vm=2.24/22.4=0.1моль
M(Mg)=24г/моль
m(Mg)=n*M=0.1*24=2.4г
w(Mg)=m(Mg)/m(смеси)=2.4/4=0.6=60%
w(Ag)=100%-60% =40%
Ответ:w(Mg)=60%;w(Ag)=40%
2 votes
Thanks 1
ТaняФ
Здравствуйте, пожалуйста, помогите с задачей http://znanija.com/task/11428818
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Answers & Comments
Verified answer
10.MgCO3--(t)->MgO+CO2
MgO+C-->Mg+CO
11.
2Na+2H2O-->2NaOH+H2
4Na+O2-->2Na2O
2Na+S-->Na2S
12.
Дано:
m(смеси)=4г
V(H2)=2.24л
Найти:
w(Ag)-?
w(Mg)-?
Решение:
Mg+H2SO4=MgSO4+H2
n(H2)=n(Mg)=V/Vm=2.24/22.4=0.1моль
M(Mg)=24г/моль
m(Mg)=n*M=0.1*24=2.4г
w(Mg)=m(Mg)/m(смеси)=2.4/4=0.6=60%
w(Ag)=100%-60% =40%
Ответ:w(Mg)=60%;w(Ag)=40%