A solution is prepared by dissolving 40 g of NaCl in 200 g of water. What is the mass per cent of NaCl in the solution?
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A.
0.2
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B.
0.1667
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C.
0.45
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D.
0.25
Correct Answer:
B. 0.1667
Explanation:
To determine the mass percentage of the solute, the mass of the solute is divided by the total mass of the solution and multiplied by 100. In this case, the solute is 40 g of NaCl and the solvent is 200 g of water, making the total mass of the solution 240 g. Dividing 40 by 240 results in approximately 0.1667, which corresponds to a mass percentage of 16.67%.
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