The average translational K.E. of the molecules in a sample of oxygen at 300K is 6 x 10-20. What is the average translational energy at 750 K?

• 3.5 x 10^-21 J
• 3.5 x 10^-18 J
• 1.5 x 10^-19 J
• 2 x 10^-19 J

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