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Ulia209
Ulia209
26.03.2020 17:52 •  Химия

С чем реагирует оксид серы(VI) 1)оксид серы

2)кислородом

3)азотная кислота

4)оксидом углерода(IV)

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Ответ:
anonim197
anonim197
19.10.2022 10:38

ответ:  m (CuO) = 80 г

W% (примесей) = 5%

Найти m (Cu) = ?

1. Уравнение реакции: 2 СuO+C=CO2+2Cu

2. Находим чистого оксида меди:

Если 5% примесей, то 95% чистого, тогда

80 г составляет 100 %

Хг составляет 95%, отсюда Х=80 г * 95%/100%=76 г (чистого CuO).

3. Находим М (CuO) = 80 г/моль M (Cu) = 64 г/моль, теперь рассчитываем массу меди:

по известной массе оксида меди найдем количество CuO: n (cuO) = m / M=76 г/моль/80 г/моль=0,95 моль. А т. к. n (СuO) = n (Cu) = 0,95 моль, значит масса меди=0,95 моль * 64 г/моль=60,8 г.

ответ: масса меди равна 60,8 г.

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Ответ:
BTS48
BTS48
22.09.2021 12:24

Дур*

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