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Answer :
Final answer:
The mass/volume percent of a sodium chloride solution is calculated using the formula (mass of solute)/(volume of solution) x 100%. For 25.0 grams of NaCl in 455 mL of water, the m/v% is approximately 5.50% after rounding to the correct significant figures.
Explanation:
The question requires the calculation of the mass/volume percent (m/v)% of a sodium chloride (NaCl) solution. The formula to calculate mass/volume percent is: (Mass/volume)% = {[mass of the solute]/[volume of the solution]} x100%. In the first example given, the mass of the solute is 25.0 grams of NaCl, and the volume of the solution is 455 mL. Therefore, the calculation would be (25.0 g / 455 mL) x 100%, which equals approximately 5.50% (g/mL %) after rounding off to the correct significant figures.
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