The alloy sample contains 15 g of magnesium. The mass fraction of this metal in the alloy is 20%.
| April 2, 2021 | education
The alloy sample contains 15 g of magnesium. The mass fraction of this metal in the alloy is 20%. What is the mass of the sample?
15 g magnesium – 20% by weight of the sample;
x g magnesium – 100% of the sample weight;
Sample weight: 15 * 100/20 = 75 (g).
Answer: 75 g.
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