50.0 mL of 0.20M NaOH is added to 450.0mL of 0.050M HNO3. Determine the following information: Excess reactant, Moles of excess reactant, pH of final solution

50.0 mL of 0.20M NaOH is added to 450.0mL of 0.050M HNO3. Determine the following information:
Excess reactant, Moles of excess reactant, pH of final solution