A mole of diatomic oxygen molecules and a mole of diatomic nitrogen molecules are at STP. Which statements are true about these molecules? (There could be more than one correct choice.)
A) Both gases have the same average momentum per molecule.
B) Both gases have the same average kinetic energy per molecule.
C) Both gases have the same average molecular speeds.
D) Both gases have the same number of molecules.

Question

Quizplus · Accepted Answer

At STP, all gases have the same average kinetic energy per molecule due to the equipartition theorem, and a mole of any substance contains the same number of entities, defined by Avogadro's number.

A Mole of Diatomic Oxygen Molecules and a Mole of Diatomic