Find the mass of salt obtained by evaporating 300 g of its solution with a mass fraction of salt of 0.15.
| March 1, 2021 | education
1. There is a special formula:
M (substance) = M (solution) * W (substance); where M is the mass, W is the mass fraction.
2. The substance in this case is salt.
3. Conversion of units of measurement into the International System (SI) is not required.
4. It remains only to substitute numerical values:
M (salt) = 300g * 0.15 = 45g.
Answer: The mass of salt is 45 grams.
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