00:01
Students, here in this question part first we have given the mass of n2 and o2.
00:04
We have to find out the mole fraction of each.
00:07
First, we will find out the number of moles for n2 that would be equal to the given mass by molecular weight.
00:18
The given mass here is 1 .32 g and the molecular weight for the n2 that would be 28 g per mole.
00:30
We get the number of moles that is 0 .0471.
00:33
Now, we will calculate the moles of o2.
00:39
So, the given mass is 0 .87 g and the molecular weight for this that would be 32 g per mole.
00:50
So, g would be cancelled out, we will get the number of moles that would be 0 .0272 mole.
01:00
So, the total number of moles, total number of moles would be equal to the 0 .0471 plus 0 .0272 is equals to we will get 0 .0743.
01:19
Now, we will calculate the mole fraction of n2.
01:23
So, the mole fraction of n2 would be equal to the moles of n2, moles of n2 by total moles.
01:41
So, moles of n2 is 0 .0471 over total moles are 0 .0743.
01:48
We will get the mole fraction of n2 that would be equal to the 0 .634.
01:57
Now, the mole fraction of o2 is 1 minus 0 .634...