00:01
Hi there.
00:02
To answer this question, we have to think about what is the only type of molecule that only has london dispersion forces.
00:11
And that would be non -polar molecules.
00:14
Non -polar molecules have only london dispersion forces.
00:26
So i'm just going to abbreviate this here.
00:29
London dispersion forces.
00:32
All right.
00:34
So what we're looking for then is the molecule that is non -polar.
00:38
Let's sketch each one of these out.
00:41
First we have nh3.
00:46
Nh3 looks like this.
00:50
So it's a tetrahedral electron pair geometry, but only three of those have bonds.
01:00
So it's going to be a trigonal pyramidal, or that pyramid shape.
01:04
And n to h bonds are polar.
01:06
So this is going to be a polar molecule.
01:09
In fact, seeing those n to h bonds tells us that is going to have hydrogen bonding.
01:16
So it will have the strongest type of intramolecular force.
01:21
All right.
01:21
So that one is not our answer.
01:23
Let's look at letter b.
01:25
Letter b is ch3 -o -h.
01:28
So c -o -h and h3.
01:37
So we see that oh on the end of it.
01:40
That oh, again, that's going to be polar...