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Hydrocarbons (not to be confused with carbohydrates) are molecules containing only carbon and hydrogen atoms. Examples include methane (CH4) and benzene (C6H6). How many hydrogen atoms are present in a linear hydrocarbon chain of nine carbons joined to each other by single covalent bonds? Hint: remember you need to satisfy the octet rule for each carbon.

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Answer:

20 hydrogen atoms

Explanation:

Let us carefully observe the words of the question. We were told that the compound is a hydrocarbon. This implies that it is composed of only hydrogen and carbon.

Secondly, we are informed that the compounds is composed of only C-C single covalent bonds. This means that the compound is an alkane.

Then we are told that it contains nine carbon atoms and is a linear molecule. Hence, the compound must be n-nonane.

Recall that for alkanes, the general molecular formula is CnH2n+2 Substituting n=9 for nonane we have; C9H(2*9)+2 which is C9H20.

Thus there are 20 hydrogen atoms. The structure of the compound is attached to this answer

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