00:01
So i'm using ptable .com to get these values from.
00:05
It's a really great period of table.
00:07
So the average mass of a one single sodium atom is 22 .99 amu.
00:17
So the next question that asks for, what would 119 sodium atoms weigh? so we have 119 n .a atoms.
00:29
Well, we know that one n.
00:31
An a atom is 22 .99 amu so we get 2 ,735 .81 amu.
00:46
Now it's telling us that we have 460 amu.
00:51
How many sodium atoms is that? well, we know that one sodium atom is 22 .99 amu.
01:05
So we have 20 sodium atoms.
01:16
Now the next one gets a little bit more interesting, so they're asking us in grams.
01:20
So if you have 11 .49 grams of sodium, well now we're going to have to go up to the mole.
01:29
So now you have one mole of sodium.
01:33
One mole of sodium weighs 22 .99 grams...