00:01
Hi there.
00:02
In this problem, we are, again, doing an ideal gas equation problem.
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So our equation for the ideal gas law is pv equals nrt.
00:16
Reading through this word problem, we see that we are trying to find the number of moles in this problem.
00:22
We want to know how many moles of neon we have.
00:30
Looking at the other values given in this word problem, we see that we are given a pressure of 0 .947.
00:37
Atmospheres.
00:42
We're given a temperature of 276 kelvin.
00:52
We're given a volume of 712 milliliters.
01:00
We know that when we're using any of our universal gas constants, the volume has to be in liters.
01:08
So converting this milliliters to liters, i need to divide by 1 ,000.
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So there are 1 ,000 milliliters in 1 liter.
01:20
This gives me 0 .7 .7.
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1 2 liters.
01:25
And finally, my universal gas constant.
01:28
Looking at the unit i have for pressure, it's atmospheres.
01:32
So i want to select the universal gas constant that has pressure in atmospheres.
01:36
And that is the 0 .0821 liters times atmospheres over mole times kelvin.
01:51
We see those unique units of a constant.
01:54
That is not unusual, and we'll see how those units play out here as we solve the problem...