Ответ:
Объяснение:
а) M(Cu₂O) = Ar(Cu) * 2 + Ar(O) = 64 * 2 + 16 = 144
б) M(Fe₂O₃) = Ar(Fe) * 2 + Ar(O) * 3 = 56 * 2 + 16 * 3 = 160
в) M(Ca(OH)₂ = Ar(Ca) + (Ar(O) + Ar(H)) * 2 = 40 + (16 + 1) * 2 = 74
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Ответ:
Объяснение:
а) M(Cu₂O) = Ar(Cu) * 2 + Ar(O) = 64 * 2 + 16 = 144
б) M(Fe₂O₃) = Ar(Fe) * 2 + Ar(O) * 3 = 56 * 2 + 16 * 3 = 160
в) M(Ca(OH)₂ = Ar(Ca) + (Ar(O) + Ar(H)) * 2 = 40 + (16 + 1) * 2 = 74