URGENT PLEASE HELP! Calculate the moles of Sodium Peroxide (Na2O2) produced if 32.5 mol of sodium reacts with excess oxygen.

__Na+__O2—>Na2O2

A. 32.5 mol
B. 16.3 mol
C. 65.0 mol
D. 21.67 mol

and why is it one of the answer above?

Asolution is made by dissolving 2.3 moles of sodium chloride (nacl) in 0.155 kilograms of water. if the molal boiling point constant for water (kb) is 0.51 °c/m, what would be the boiling point of this solution? show all the steps taken to solve this problem.