The average translational energy and the rms speed of molecules in a sample of oxygen gas at 300 K are \[6.21\text{ }\times \text{ }{{10}^{-21}}\text{ }J\] and 484 m/s respectively The corresponding values at 600 K are nearly (assuming ideal gas behavior)

• A. \[12.42\times {{10}^{-21}}J,928m/s\]
• B. \[8.78\times {{10}^{-21}}J,684m/s\]
• C. \[6.21\times {{10}^{-21}}J,968m/s\]
• D. \[12.42\times {{10}^{-21}}J,684m/s\]