Question

What's the general formula for an alkane if n is the number of carbon atoms?
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Answer 1

the correct answer is option d .

Answer 2

Option D
`C{n}`
`H_(n+2)`

Step-by-step explanation:

Alkanes have nothing but carbon and hydrogen bonds, with no double or triple carbon bonds. Each carbon in the chain will have a unit of CH2, with the other 2 carbon bonds connected to 2 neighboring carbons. The terminal carbons will have 3 H's each.

So an alkane will have multiple (CH2) groups plus 2 CH3 groups on either end. If there are n Carbons, there will be 2n Hydrogens plus 2 more for the end carbons.
`C_(n)`
`H_(n+2)`