00:01
All right, in this problem, part a of number one, we're comparing the number of molecules in one mole of nitrogen gas with another number of molecules and one mole of oxygen gas.
00:12
And the key to understanding a mole is that there are 6 .02 to times 10 to the 23rd, basically a boatload of particles or molecules or units in a mole.
00:31
So in this case, we're looking at molecules of gas.
00:39
And there's that many particles in each and every mole.
00:44
So, for example, if there were a mole of human beings, you would have this enormous number of human beings.
00:55
So a mole of nitrogen gas will have 6 .022 times 10 to the 23rd molecules in it.
01:03
A mole of oxygen gas will also have 6 .022 times 10 to the 23rd molecules.
01:10
So these will have the same number of moles.
01:17
All right.
01:20
The same number of molecules, that is, okay, by the very definition of what a mole is.
01:26
So a mole of human beings has that many human beings.
01:30
A mole of molecules has that many molecules.
01:33
A mole of atoms has that many atoms.
01:37
It's just an enormous number.
01:39
It's like a package that we can use...