00:01
For this problem, you're converting atoms to moles, and you're told that one mole of any substance equals 6 .02 times 10 to the 23rd of that.
00:12
In this case, it's atoms.
00:14
It could be molecules, it could be horses, it could be people, it could be ions, it could be whatever.
00:19
So one mole simply means 6 .02 times 10 to the 23rd, just like a dozen means 12, whether it's people or atoms or shoes or whatever.
00:30
It's just a word that means a number.
00:35
So if we had 25 times 10 to the 23rd atoms, how many moles would that be? so this is dimensional analysis.
00:43
We're trying to pick which of these labels would cancel this out.
00:47
So since atoms is here, atoms will go on the bottom, and then we will convert to moles...