Answer :

To calculate the number of moles in a solution, one can use the formula: Moles = Molarity × Volume Where: - Molarity (M) is the concentration of the solution in moles per liter. - Volume (L) is the volume of solution in liters. In this case, the molarity is given as 2 M (moles per liter), and the volume of the solution is 5.6 liters. Applying the values to the formula, we get: Moles = Molarity × Volume Moles = 2 M × 5.6 L Moles = 11.2 moles So, there are 11.2 moles in a 5.6 L solution of CaCl2 that is 2 M. The correct answer is: 11.2 mol