To calculate the molarity of the solution, Josh should calculate the moles of "sodium nitrate, because it is the solute".
Answer: Option B
Step-by-step explanation:
The number of moles of solute per liter of solution is known as Molarity of solution expressed in moles/liter. It is symbolized as "M" very general unit applicable to measure the solution's concentration. It is also used to estimate the solvent's volume or the solute's amount.
Here solute is sodium nitrate in solid form, which is dissolved in solvent water. Here molarity is calculated by dividing moles of sodium nitrate by liters of solution to be made.