00:01
So this question says that we have an unknown chloro -fluorocarbon, which is just a compound containing chlorine, fluorine, and carbon, and wants us to find the percent by mass of that chloro -florocarbone is chlorine.
00:15
What percent of it is chlorine? and so the first thing we can do is figure out the mass of chlorine.
00:23
And once we have the mass of chlorine, we can divide it by the total mass to determine the percent chlorine.
00:28
And so the first thing we need is the ideal gas law to find the number of moles of chlorine.
00:35
And so our pressure is 752 millimeters of mercury, which we can convert to atmospheres by dividing by 760 to get 0 .98947 atmospheres.
00:52
Our volume is 564 milliliters, which we can divide by 1 ,000 to convert into liters.
01:00
So it's 0 .564 liters.
01:04
N is our unknown.
01:06
R is a constant, 0 .082 -057.
01:12
And that's in liter atmospheres per mole kelvin...