Ответ:
M(Cu2S) =64*2+32=160 g/mol
w(Cu) =128:160=0.8
m(Cu) =0.8*10=8g
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Ответ:
M(Cu2S) =64*2+32=160 g/mol
w(Cu) =128:160=0.8
m(Cu) =0.8*10=8g