The partial Lewis structure that follows is for a hydrocarbon molecule. In the full Lewis structure, each carbon atom satisfies the octet rule, and there are no unshared electron pairs in the molecule. The carbon—carbon bonds are labeled 1, 2, and 3. (a) How many hydrogen atoms are in the molecule?

Video transcript

Hi everyone here. We have a question telling us that the skeletal structure below corresponds to a hydrocarbon where each of the ends and vortices corresponds to a carbon atom. Each carbon atom satisfies the octet rule, and there are no lone pairs in the molecule determine the number of hydrogen in the structure. So we have carbon double bonded to carbon single bonded to carbon double bonded to carbon, single bonded to carbon double bonded to carbon and single bonded to carbon. So now we need to add our hydrogen. So we need a hydrogen here, a hydrogen here and there's another carbon here and we need a hydrogen here and here and here and now. This carbon is going to need three hydrogen to have four electron pairs and fill the octet rule. And now let's count these hydrogen. So we have 123456, 78. So there are eight hydrogen. And that is our final answer. Thank you for watching. Bye.