A Student Has Three Samples of Gases That Have Equal

Multiple Choice

A student has three samples of gases that have equal volume. The three gases are O₂, CO₂, and NH₃; all the gases are at the same temperature and pressure. Which of the following sample contains the largest number of atoms?

A) O₂ contains the largest number of atoms.
B) CO₂ contains the largest number of atoms.
C) NH₃ contains the largest number of atoms.
D) All three gas samples contain an equal number of atoms.