A solution weighing 20 g contains 5 g of copper sulfate. Protect the mass fraction of salt in the solution.

In order to calculate the mass fraction of salt in the solution, it is necessary to divide the mass of the salt by the mass of the solution.
The mass of salt is 5 grams.
The mass of the solution is 20 grams.
The mass fraction of salt in the solution is:
M = M salt / M solution = 5/20 = 25%;



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