Предмет: Химия, автор: covganmaksim64

3.Обчисліть масову частку Купруму в купрум(II) оксиді за формолую ​

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Автор ответа: mp230986
1

Відповідь: 80%

дай, будь-ласка, найкращу відповідь

Пояснення:

W(Cu) = Ar(Cu)/Mr(CuO) *100% = 64/80 *100% = *скорочуємо на 64 та 80 на 16* = 4/5 * 100% = 0,8 * 100% = 80%

Ar(Cu) = 64

Mr(CuO) = Ar(Cu) + Ar(O) = 64 + 16 = 80

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