00:02
Hi there, this question is asking us which of these molecules contain polar covalent bonds? and remember to have a polar covalent bond.
00:18
The electronegativity difference, that is the difference between the electronegativity is that the two bonded atoms, needs to be between 0 .4.
00:37
And the upper limit varies from source to source.
00:41
I'm going to use 1 .8.
00:44
Some will say lower than that.
00:45
Some will say lower than that.
00:45
Some will say a little bit higher than that.
00:47
But i don't think we have any that are approaching that distance.
00:50
And if it does get up that high, then it is going to be ionic if it's over that amount.
00:55
But 0 .4 to 1 .8 is what we're going to go for, go with for this.
00:59
So let's look at each of these.
01:01
We have a carbon monoxide bond, a c to o.
01:06
So assigning the electronegativities, carbon is 2 .5.
01:10
Oxygen is 3 .5.
01:14
So the difference in electronegativities, like a little row here, is 1 .0.
01:24
So this has polar bonds because the difference in electromagnetivities lies between that 0 .4 to 1 .8 range.
01:40
Right.
01:41
The next molecule we're given here is n2.
01:48
Okay, we really don't even have to look at the electronegativities since they are the same element.
01:53
We know they're going to have the same electronegativities.
01:56
So when we find the difference in the electronegativities, it's going to be zero.
02:01
This is going to be a non -polar bond...