00:02
Hi there.
00:03
In this problem, we are trying to calculate volume when we are given mass, temperature, and pressure.
00:15
The mass of this gas is 6 .74 grams, and they tell it that it is c2h4.
00:30
The temperature of this gas is 41 degrees celsius, and the pressure is 733 .4.
00:49
Given this information, it looks like it's going to be a pv equals nrt problem.
00:59
And if i rearrange it to solve for volume, i see that volume is going to be nrt over pressure.
01:13
And remember, is number of moles.
01:16
And we were given mass in this problem.
01:17
So before i can plug that mass into this equation, i need to convert it to moles by dividing by the molar mass of c2h4.
01:26
The molar mass of c2h4 is 28 .05 grams.
01:37
And every mole of it, grams of c2h4 cancel, and i am given moles.
01:53
The number of moles i have is 0 .240.
02:02
Moles of c2h4.
02:07
The other thing i need to do is make sure my temperature is in kelvin.
02:10
So i'm going to go ahead and add 273 to that 41 degrees celsius, and i get 314 kelvin.
02:20
Now i'm ready to plug everything into this equation to calculate my volume...