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anna1993nikita
@anna1993nikita
August 2021
1
9
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3;4;5
Если можно с "Дано".
Химия 9 класс.
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mspyps
1) CuCl 2 + Na 2 S = CuS + 2NaCl m (CuCl 2 ) = 27 10 / 100 = 2,7 г n (CuCl 2 ) = = = 0,02 моль n (CuS) = 0,02 моль m (CuS) = n M = 0,02 96 = 1,92 г
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anna1993nikita
это какой номер ?)
mspyps
1)
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