Question

Water from the Don Juan Pond in Antarctica is 4.40 M sodium chloride. If you have a 

340. mL sample of lake water, how many grams are in solution?

Answer 1

Molarity = 4.40M

Volume of solution = 340 mL = 0.340L

Molarity = $\frac{no. of moles of solute }{volume of solution}$

4.40 M = $\frac{moles of solute }{0.340 L}$

moles of solute = 1.496 moles

molecular weight of sodium chloride = 58.44g

Grams in solution = 1.496×58.44 = 87.42g