What is the molarity of a nitric acid solution that was prepared by mixing 75.00 mL of 0.150 M HNO₃ and 125.00 mL of 0.250 M HNO₃?

• A. 0.400 M
• B. 0.213 M
• C. 2.52 M
• D. 1.93 M

Answer: (B)