00:05
Okay, so this question is asking, at what temperature in degrees celsius will helium particles have an average velocity of 45 meters per second? and the formula we're going to use here is the velocity is equal to the square root of 3rt over m, where we know that as we plug in values here, our u value is 45 meters per second.
00:36
Velocity is 45 meters per second.
00:40
Three, of course, is three.
00:43
R is 8 .31.
00:46
And our temperature is our unknown.
00:53
Our molar mass, helium is 4 grams per mole.
00:56
But for this formula, we want to make sure that we are in kilograms per mole.
01:03
So it's 0 .004 kilograms per mole.
01:08
And so the first thing i'm going to do, since we're calculating t right now, this calculation is going to give us t in kelvin, which means that it's going to be a positive number...