Question

How many moles of NaCI are in 250.0 ml of a 0.35 M NaCl solution?

Answer 1

Answer: The number of moles of NaCl in the solution are 0.0875 moles.

Explanation:

To calculate the number of moles of NaCl, we use the equation that is used to calculate molarity, which is:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$

We are given:

Molarity of NaCl solution = 0.35 mol/L

Volume of solution = 250 mL = 0.250 L      (Conversion factor:  1L = 1000 mL)

Putting values in above equation, we get:

$0.35mol/L=\frac{\text{Moles of NaCl}}{0.250L}\\\\\text{Moles of NaCl}=0.0875mol$

Hence, the number of moles of NaCl in the solution are 0.0875 moles.