Объяснение:
Mr(CaSO4) = Ar(Ca) + Ar(S) + 4*Ar(O) = 40 + 32 + 4*16 = 136
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Объяснение:
Mr(CaSO4) = Ar(Ca) + Ar(S) + 4*Ar(O) = 40 + 32 + 4*16 = 136