A2.750×10−2m solution of nacl in water is at 20.0∘c. the sample was created by dissolving a sample of nacl in water and then bringing the volume up to 1.000 l. it was determined that the volume of water needed to do this was 999.3 ml . the density of water at 20.0∘c is 0.9982 g/ml.
calculate the mole fraction of salt in this solution.
calculate the concentration of the salt solution in percent by mass.
calculate the concentration of the salt solution in parts per million.

Mole fraction of salt is 0.00049.

The concentration of the salt solution in percent by mass is 0.16%.

The concentration of the salt solution in parts per million is 1,610.18 .

Explanation:

Molarity of the NaCl solution =

Moles of NaCl =

Volume of the solution = 1.000 L

Molarity=

Mass of of NaCl :

Mass of water = m

Density of water = 0.9982 g/mL

Volume of water = 999.3 mL

Moles of water =

Mole fraction of salt =

Percentage by mass:

The concentration of the salt solution in percent by mass is 0.16%.

The concentration of the salt solution in parts per million.

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.