Final answer:
To calculate osmolarity, it is necessary to know if the solution is an electrolyte or nonelectrolyte.
Step-by-step explanation:
Osmolarity is a measure of the concentration of solute particles in a solution. It is calculated by dividing the number of moles of solute by the volume of the solution in liters. To determine the osmolarity, it is necessary to know if the solute is an electrolyte or nonelectrolyte.
An electrolyte is a solute that dissociates into ions when dissolved in water, while a nonelectrolyte does not dissociate into ions. Both electrolytes and nonelectrolytes contribute to the osmotic balance. Therefore, the answer is True, you would need to know if the solution is an electrolyte or nonelectrolyte to calculate osmolarity.