00:01
To calculate how many grams that we would need to prepare 100 milliliters of 0 .2 -0 -0 molar.
00:09
And we've got six substances.
00:11
I put three in this page, three in the next page.
00:13
We're going to start all of these the same.
00:15
I'm going to start by writing that this is equal to 0 .1 -00 liters.
00:24
So i need 0 .01 0 .0 liters of 0 .2 .00 moles per liter.
00:42
And i went through and looked up the molar masses for each one of these because i'm too lazy to calculate them.
00:51
I'll so equal point.
00:53
It's clear, clear.
00:54
0 .1 times 0 .2 times 253 .32.
01:00
And i'll need 5 .07 grams.
01:07
For my first one.
01:10
For my second one, i'm going to start down here.
01:14
My first part is going to be the same for each one of these.
01:24
And then we'll just multiply 1 .9 .38 grams per mole.
01:34
Point 1 times 0 .2 times 119 .38...