The mass of the solution is 150 grams;
To find the mass of salt, it is necessary to multiply its mass fraction by the mass of the solution.
m salt = 150 x 0.05 = 7.5 grams;
To find the mass of water, subtract the mass of salt from the mass of the solution:
m of water = 150 – 7.5 = 142.5 grams;
Check: 142.5 + 7.5 = 150;
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