Ответ:
Fe3O4
Объяснение:
1) Mr[CuFeS2] = Ar[Cu] + Ar[Fe] + Ar[S] * 2 = 64 + 56 + 32 * 2 = 184
ω (Cu) = 64 : 184 * 100 = 35 %
ω (Fe) = 56 : 184 * 100 = 30 %
ω (S) = 64 : 184 * 100 = 35 %
2) Mr[Fe3O4] = Ar[Fe] * 3 + Ar[O] * 4 = 556 * 3 + 16 * 4 = 232
ω (Fe) = 168 : 232 * 100 = 72 %
ω (O) = 64 : 232 * 100 = 28 %
3) Mr[Fe2O3] = Ar[Fe] * 2 + Ar[O] * 3 = 56 * 2 + 16 * 3 = 160
ω (Fe) = 112 : 160 * 100 = 70 %
ω (O) = 48 : 160 * 100 = 30 %
4) Mr[FeS2] = Ar[Fe] + Ar[S] * 2 = 56 + 32 * 2 = 120
ω (Fe) = 56 : 120 * 100 = 47 %
ω (S) = 64 : 120 * 100 = 53 %
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Ответ:
Fe3O4
Объяснение:
1) Mr[CuFeS2] = Ar[Cu] + Ar[Fe] + Ar[S] * 2 = 64 + 56 + 32 * 2 = 184
ω (Cu) = 64 : 184 * 100 = 35 %
ω (Fe) = 56 : 184 * 100 = 30 %
ω (S) = 64 : 184 * 100 = 35 %
2) Mr[Fe3O4] = Ar[Fe] * 3 + Ar[O] * 4 = 556 * 3 + 16 * 4 = 232
ω (Fe) = 168 : 232 * 100 = 72 %
ω (O) = 64 : 232 * 100 = 28 %
3) Mr[Fe2O3] = Ar[Fe] * 2 + Ar[O] * 3 = 56 * 2 + 16 * 3 = 160
ω (Fe) = 112 : 160 * 100 = 70 %
ω (O) = 48 : 160 * 100 = 30 %
4) Mr[FeS2] = Ar[Fe] + Ar[S] * 2 = 56 + 32 * 2 = 120
ω (Fe) = 56 : 120 * 100 = 47 %
ω (S) = 64 : 120 * 100 = 53 %