Ответ:
Объяснение:
Mr(Fe₂(SO₄)₃) = 2Ar(Fe) + (Ar(S) + 4Ar(O))*3 = 2*56+(32+4*16)*3 = 400
Mr(Cu₃(PO₄)₂) = 3Ar(Cu) + (Ar(P) + 4Ar(O))*2 = 3*64+(31+4*16)*2 = 382
Mr(CuO) = Ar(Cu) + Ar(O) = 64 + 16 = 80
Mr(Ba(OH)₂) = Ar(Ba) + (Ar(O) + Ar(H))*2 = 137 + (16+1)*2 = 171
Mr(Al₂O₃) = 2Ar(Al) + 3Ar(O) = 2*27 + 3*16 = 102
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Ответ:
Объяснение:
Mr(Fe₂(SO₄)₃) = 2Ar(Fe) + (Ar(S) + 4Ar(O))*3 = 2*56+(32+4*16)*3 = 400
Mr(Cu₃(PO₄)₂) = 3Ar(Cu) + (Ar(P) + 4Ar(O))*2 = 3*64+(31+4*16)*2 = 382
Mr(CuO) = Ar(Cu) + Ar(O) = 64 + 16 = 80
Mr(Ba(OH)₂) = Ar(Ba) + (Ar(O) + Ar(H))*2 = 137 + (16+1)*2 = 171
Mr(Al₂O₃) = 2Ar(Al) + 3Ar(O) = 2*27 + 3*16 = 102