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Answer :
Given that the mass of calamine is 38.2 g. Thus, the mass percentage of 38.2 g of calamine in a 349 g solution is 10.9%.
Mass percentage refers to the number of grams of solute present in the 100 grams of the solution. The formula for mass percentage is:$$\text{Mass Percentage} = \frac{\text{Mass of solute}}{\text{Mass of solution}} \times 100\%$$Given that the mass of calamine is 38.2 g.
The mass of the solution is 349 g, we can substitute these values into the formula:$$\text{Mass Percentage} = \frac{38.2}{349} \times 100\%$$Evaluating the right-hand side of this equation gives us:$$\text{Mass Percentage} = 0.109\text{ or }10.9\%$$.
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