00:03
Hi there.
00:04
In this question, we are trying to get 0 .0 .150 moles of hbr.
00:17
And we're trying to get this from a solution of hbr that has a molarity of 0 .220.
00:24
So let's think about what malarity is for a moment.
00:27
Malarity is moles of solute per liter of solution.
00:32
So this solution must have 0 .220.
00:36
2 .20 moles of hbr in every liter of solution because that is the definition of molarity.
00:47
It is moles of solute per liters of solution.
00:52
So this molar solution must have 0 .220 moles of hbr in every liter of it.
00:58
All right.
00:59
So with this information, the number of moles we're trying to harvest, and the molarity, we can calculate a volume.
01:12
All right, so if we're starting with moles, i'm going to now use that molarity equality as a conversion factor.
01:21
So that means the point 220 moles must go in the denominator so that moles will cancel...