AP Chemistrymediummcq1 pt
At the same temperature, how do the average speeds of H₂ and O₂ molecules compare?
A.H₂ molecules are faster
B.O₂ molecules are faster
C.They have equal average speeds
D.H₂ is faster only at high pressure
Explanation
Core Concept
Both gases share the same average kinetic energy at a given T, so ½mv² equal means lighter molecules move faster. H₂'s mass is 1/16 of O₂'s, making it four times faster on average.
Correct Answer
AH₂ molecules are faster
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