00:01
In this question, we are going to determine the molecular formula for two hydrocarbons.
00:07
So the first hydrocarbon, which we are going to be looking at, it is a four carbon hydrocarbon with two piburns and no ring.
00:17
So first, let's look at a four carbon hydrocarbon with no pi bond and no ring.
00:37
So the molecular formula is equal to cn h 2n plus 2, where n is the number of carbon atoms.
01:02
And in this case, there are four carbon atoms.
01:06
So it's c4, h, and its two fours are eight plus two is ten.
01:14
Okay? but what we are looking for is a four carbon hydrocarbon with two pi bonds and noring.
01:49
So we have two pie bonds, so therefore there are two degrees of unsaturation present.
02:15
And from the molecular formula, you're going to support.
02:19
Subtract two hydrogens for each pi bond from the molecular formula...