1. дано m(Fe) = 78 g ---------------------- V(CL2)-? 78 X 2Fe+3CL2-->2FeCL3 M(Fe)=56 g/mol Vm=22.4 L/mol 2*56 3*22.4 X=78*67.2 / 112 = 46.8 L
ответ 46.8 л
2. дано V(O2)= 78 L ------------------- m(Al)-? X 78 4Al+3O2-->2Al2O3 M(al)=27 g/mol Vm=22.4 L/mol 4*27 3*22.4 X= 108 * 78 / 67.2 = 125.4 g ответ 125.4 г
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Verified answer
1. даноm(Fe) = 78 g
----------------------
V(CL2)-?
78 X
2Fe+3CL2-->2FeCL3 M(Fe)=56 g/mol Vm=22.4 L/mol
2*56 3*22.4
X=78*67.2 / 112 = 46.8 L
ответ 46.8 л
2. дано
V(O2)= 78 L
-------------------
m(Al)-?
X 78
4Al+3O2-->2Al2O3 M(al)=27 g/mol Vm=22.4 L/mol
4*27 3*22.4
X= 108 * 78 / 67.2 = 125.4 g
ответ 125.4 г
3. 4Al+3CL2-->2Al2CL3
4Fe(OH)2+O2+H2O-->4Fe(OH)3
Fe+Cu(NO3)2--> Cu+Fe(NO3)2