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A 2.800×10−2 M solution of NaCl in water is at 20.0∘C. The sample was created by...

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Chemistry

A 2.800×10−2 M solution of NaCl in water is at 20.0∘C. Thesample was created by dissolving a sample of NaCl in water and thenbringing the volume up to 1.000 L. It was determined that thevolume of water needed to do this was 999.2 mL . The density ofwater at 20.0∘C is 0.9982 g/mL.

1a) Calculate the molality of the salt solution. Express youranswer to four significant figures and include the appropriateunits.

1b) Calculate the mole fraction of salt in this solution.Express the mole fraction to four significant figures.

1c) Calculate the concentration of the salt solution in percentby mass. Express your answer to four significant figures andinclude the appropriate units.

1d) Calculate the concentration of the salt solution in partsper million. Express your answer as an integer to four significantfigures and include the appropriate units.

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