The Root-Mean-Square Speed (Thermal Speed)of the Molecules of a Gas

question 11

Multiple Choice

The root-mean-square speed (thermal speed) of the molecules of a gas is 200 m/s at a temperature 23.0°C.What is the mass of the individual molecules? The Boltzmann constant is 1.38 × 10^-23 J/K.

• A)2.13 × 10^-25 kg
• B)2.45 × 10^-25 kg
• C)5.66 × 10^-25 kg
• D)1.78 × 10^-25 kg
• E)3.11 × 10^-25 kg

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