Does a #0.10*mol# quantity of oxygen gas contain the same number of atoms as a #0.10*mol# quantity of sodium atoms?

1 Answer
Nov 3, 2016

Answer:

Absolutely not!

Explanation:

#0.1*mol# of dioxygen gas contains #0.2*mol# of oxygen atoms.

#0.1*mol# of sodium atoms (of course) constitute #0.1*mol# of sodium atoms. And thus there are twice as many oxygen atoms as sodium atoms given the stated quantities.

Here we use the mole as simply a number, like 10 or a dozen, or a gross.

Remember, we distinguish between oxygen atoms, and oxygen molecules. This idea of #"molecularity"# is central to the study of inorganic chemistry.