Answer:
2.3
Step-by-step explanation:
To find the concentration of the solution, we need to determine the amount of solute (in moles) per unit volume of the solution (in liters). Here's how you can calculate it:
1. Convert the volume of the solution from milliliters (mL) to liters (L). Since 1 L is equal to 1000 mL, we divide 1500 mL by 1000 to get 1.5 L.
2. Calculate the concentration by dividing the number of moles of solute by the volume of the solution in liters. In this case, the student added 3.5 moles of solute, so we divide 3.5 moles by 1.5 L to get the concentration.
3. Using a calculator, the concentration is equal to 2.33 moles/L.
Therefore, the concentration of the solution is 2.33 moles/L. This means that there are 2.33 moles of solute per liter of solution.