Предмет: Химия, автор: tensandra2002

Рассчитайте массовую долю примесей (в %) в оксиде, если технический оксид меди (II) массой 200 г обработали водородом при нагревании и получили 128 г меди.

Ответы

Автор ответа: farco2004
1

Ответ:

20%

Объяснение:

CuO+H2=Cu+H2O

m(CuO)=x г

M (CuO)=80г/м

m (Cu)=128 г

М (Cu)=64 г/м

х/80=128/64

х=160 г (CuO)

200--100%

160--x%

x=80% (массовая доля оксида меди)

100%-80%=20% (массовая доля примесей)

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