00:01
Which of these is true of unsaturated fats? they are solid at room temperature.
00:05
They have double bonds in the carbon chains of their fatty acids.
00:09
They are common in animals, more so than plants.
00:13
Or they have more hydrogen than saturated fats with the same number of carbon atoms.
00:19
So unsaturated fats, saturated fats, it's all about the bonds in these carbon chains.
00:26
So a fatty acid has a long carbon chain with just hydrogens coming off.
00:31
So if you have a bond like this and these are going off to other carbons, well, carbon has four bonds per atom, so we need to fill in some hydrogen here, like this.
00:50
Okay, and now each carbon has four bonds.
00:55
So carbon forms, four bonds.
00:59
A, an unsaturated fat has double bonds.
01:02
So the answer is b.
01:04
Unsaturated means it has a double bond.
01:06
So let's put one here.
01:08
Well, now these carbons have more than four bonds.
01:11
So we also need to remove a hydrogen from each of them.
01:14
There.
01:15
Now they have four bonds again, but you can see that this chain has less hydrogen than if it only had single bonds.
01:22
So that's the problem with d...