00:02
Hi there.
00:03
This question is asking us to identify, excuse me, the hydrogen bond here.
00:10
And hydrogen bonds are intermolecular attractions.
00:18
So hydrogen bond is an intermolecular force, which means a force between molecules holding them together.
00:26
And a hydrogen bond occurs between two polar molecules.
00:32
It's going to say dipoles, but let's say polar molecules, two polar molecules that have n to h, f to h, or o to h bonds.
00:57
So they need to be polar so that there's a positive end and a negative end to the molecule.
01:03
And they need to have one of these types of bonds so that the neighboring molecules can move close to each other.
01:10
Since hydrogen is such a small atom, this allows the two molecules to move very close to each other.
01:17
And just like when you move two magnets closer to each other, you have a stronger force of attraction.
01:22
All right.
01:23
So let's look at our options here.
01:26
The first one has h2o.
01:28
And we know h2o is definitely polar because it's bent.
01:33
And it has o to h bonds.
01:35
So it can participate in hydrogen bonding.
01:38
However, we're trying to hydrogen bond this to a non -polar molecule.
01:45
Methane is a non -polar molecule.
01:48
So we will never.
01:49
Not have a hydrogen bond between these two.
01:54
Right, let's look at the next one.
01:57
The next one is h3n...