In 200g solution contains 10G salts. What is the mass fraction of salt in solution?

The mass fraction of salt in the solution is determined by the ratio of the mass of salt to the mass of the solution. To get a mass fraction in percent, the resulting value is multiplied by 100:

w = m (salts) / m (solution) = 10/200 = 0.05.

In percent, the mass fraction of salt is 0.05 * 100% = 5%.

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