13. Решение задачи по химии №001 348
4. In an alloy obtained from 100 g of magnesium and 400 g of copper, an intermetallic compound was formed, in which the mass fraction of magnesium is 15.79%. The mass (in g) of this compound is
1) 400
2) 425
3) 450
4) 475
5) 500
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