1) m(Fe3O4) = 56 * 3 + 16 *4 = 168 + 64 = 232г
m1(Fe3) = 168г
w= 168/232= 0,724 *100 % = 72,4
2) m(fe2O3) = 56*2 + 16*3 = 112 + 48 = 160г
m1(Fe2)= 112/160 = 0,7 *100% = 70
больше в Fe3O4
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Answers & Comments
3.
1)2KMnO4 = K2MnO4 + MnO2 + O2 2)4Al + 3O2 = 2Al2O3
3)3Fe + 2O2 = Fe3O4
4.
1) m(Fe3O4) = 56 * 3 + 16 *4 = 168 + 64 = 232г
m1(Fe3) = 168г
w= 168/232= 0,724 *100 % = 72,4
2) m(fe2O3) = 56*2 + 16*3 = 112 + 48 = 160г
m1(Fe2)= 112/160 = 0,7 *100% = 70
больше в Fe3O4