From 200 g of a 15% salt solution, 50 g of water was evaporated. Mass fraction of salt in the resulting solution is equal to
| May 28, 2020 | Education
200 g of a 15% solution contains 200 * 0.15 = 30 g of salt
Therefore, its mass fraction in the final solution will be equal to:
30 * 100 / (200-50) = 20%
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