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E2(SO4)3 - ogólny wzór
m S = 32u
m O = 16u
E2(S04)2 = 400u
E*2 + 288u = 400u
E*2 = 112u
E = 56u
Tym pierwiastekiem jest żelazo Fe.
Wzór ma postać Fe2(SO4)3. ;)
2x+ 3*32+12*16=400
2x+288=400
2x=112
x=56
ten metal III wartosciowy to Fe
wzor soli to fe2 (so4)3