00:02
Hi there.
00:03
In this question, we are given a molarity.
00:06
And if we recall, molarity is equal to moles per liter.
00:12
So moles of solute per liter of solution.
00:15
So given this molarity, we therefore know that 0 .30 moles of kno3 are required for every liter of the solution.
00:33
So for every liter, we need 0 .050 moles of kno3 are required for every liter of the solution.
00:34
So for every liter, we need 0 .0 .350 moles.
00:38
Of kno3.
00:40
Okay, with this equality, we can go ahead and start to calculate the mass of k &o3 that we'll need to make this solution.
00:48
We would like to make 250 milliliters of the solution, but we see that our molarity conversion here is in liters.
01:00
So the first thing i want to do is to convert milliliters to liters.
01:05
There are 1 ,000 milliliters in every liter.
01:09
Now that i'm at liters, i can use that molarity as a conversion factor.
01:15
I want to put the one liter in the denominator, which means the 0 .350 moles of kno3 goes in the numerator...