Calculate the kinetic energy of an O₂ molecule at 30ºC.

• A. 5.792 × 10^–21 J/molecule
• B. 6.278 × 10^–21 J/molecule
• C. 7.103 × 10^–21 J/molecule
• D. 8.452 × 10^–21 J/molecule

Answer: (B)