Determine the Mass fraction of salt in the solution if 35 g of salt is contained in 280 g of the solution.

Given: 35g in-va, 280g solution
Find: mass fraction of salt.
formula: mass of substance / mass of solution * 100%
solution: 35/280 = 0.125 0.125 * 100% = 12.5%
Answer: 12.5% salt in 280



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