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

Methane reacts with oxygen in the following combustion reaction. ch4 + 2o2 → co2 + 2h2o what bonds are broken in this reaction? a. four c–h single bonds and two o=o double bonds b. four c–h single bonds c. one c=o double bond and four o–h single bonds d. two o=o double bonds