A Liter Container of CO₂ and a Liter Container of H₂

question 18

Multiple Choice

A liter container of CO₂ and a liter container of H₂ are both at 25°C and 1 atm pressure. Which of the following statements about these gas samples is true?

• A)The CO₂ and H₂ molecules have the same average velocity.
• B)There are more H₂ molecules than CO₂ molecules.
• C)The average kinetic energy of the CO₂ molecules is greater than that of the H₂ molecules.
• D)The CO₂ molecules on average are moving more slowly than the H₂ molecules.
• E)The masses of the two gas samples are equal.

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