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Hi there.
00:02
In this question, we are trying to identify the constitutional isomers of octane.
00:07
So there are two things we need to know.
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We need to know what a constitutional isomer is.
00:12
Constitutional isomer refers to two or more molecules, having the same formula, but different structures or connectivity.
00:52
In other words, the atoms are put together differently.
00:54
So that actually gives us a different substance.
00:56
It's going to have different properties.
00:59
And there will be two different substances.
01:03
The next thing we need to know is the formula for octane.
01:07
Since octane ends with a &e, we know it is an alkan.
01:12
Oct tells it that it has eight carbons.
01:16
Since it's an octane, it's going to have 2n plus 2, so 2 times 8 plus 2, hydrogen.
01:24
So it's going to be c8h18.
01:27
So we are looking for which ones of these are c8h8.
01:32
Well, letter a looks like this.
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And we need to remember that at the end of each line segment is a carbon.
01:53
That means this thing has 10 carbon in it and the corresponding number of hydrogen...