Chemistry, 03.10.2021 15:40, mariahv105

Plz 50 points and brainliest but give me the true answer with steps At 200 K, the molecules or atoms of an unknown gas, X, have an average velocity equal to that of Ar atoms at 400 K. What is X? (Assume ideal behavior.)
A) He
B) CO
C) HF
D) HBr
E) F2

Answers: 2

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Plz 50 points and brainliest but give me the true answer with steps At 200 K, the molecules or ato...