Josh prepares a solution by mixing sodium nitrate and water. To calculate the molarity of the solution, Josh should calculate the moles of which substance, and why?

Molarity is the number of moles of solute per liter of solution. Sodium nitrate dissolves in water, so sodium nitrate is the solute and water is the solvent. Josh should calculate the moles of sodium nitrate.

AI-written and checked against the verified answer.