Answer: 71.43 M.
Explanation: To calculate the molarity of a solution, we divide the number of moles of solute by the volume of the solution in liters. The volume of the solution in this case is given in milliliters, so we need to convert it to liters before we can calculate the molarity.
35 mL = 0.035 L (since 1 mL = 0.001 L)
So, the molarity of the solution can be calculated as follows:
Molarity = moles of solute / volume of solution in liters
Molarity = 2.50 moles / 0.035 L
Molarity = 71.43 M
Therefore, the molarity of the solution is 71.43 M.