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svetka1574

     32 г                                    Х г

    2Сu      +       O2       =       2CuO

n=2 моль                              n=2 моль

М = 64 г/моль                     М = 80 г/моль

m=128 г                                m=160 г

32 г Cu     -     Х г CuO

128 г Cu    -   160 г CuO

m(CuO)= 32 * 160 / 128 = 40 г

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