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Classification of Hydrocarbons

How many hydr...

Question

How many hydrogen atoms would you expect to find in a saturated hydrocarbon with 7 carbon atoms?

A

7

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B

16

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C

18

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D

14

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E

12

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Solution

The correct option is A 16
There are 16 hydrogens atoms in the saturated hydrocarbons with 7 carbon atoms.
As this compound must be heptane, which is alkane, and alkanes have formula ; $C_{n} H_{2 n + 2} = C_{7} H_{2 \times 7 + 2 = 16} = C_{7} H_{16}$

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