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How does a sample of helium at 15 °C compare to a sample of helium at 215 K?

A. The helium at 15 °C has a higher average kinetic energy than the sample at 215 K.
B. The helium at 15 °C has lower nuclear energy than the sample at 215 K.
C. The helium at 15 °C has slower-moving atoms than the sample at 215 K.
D. The helium at 15 °C has smaller atoms than the sample at 215 K.

Answer :

The answer is: The helium at 15 °C has a higher average kinetic energy than the sample at 215 K.

215 K is equivalent to -58.15 °C. Temperature is directly proportional to average kinetic enegry, so 15 °C has a higher average kinetic energy than the sample at -58.15 °C or 215K.

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