Problems
•Calc the composition of the soln in W/V%: 20.0g acetic acid in 2.50L sollution
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•Calc the W/W % of  31.0 g of KCl in 152 g of water.
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•Calc the W/W% of 50.0 g KCl in 5.00 x 102 mL solution (d = 1.14g/mL)