# X-alkanes

Chemistry Level 4

Define a class of organic compounds namely $$\text{X}$$ - alkanes - $$n$$ where $$\text{X}$$ is a functional group. Basically such compounds contain a straight chain alkane (i.e. with no branching ) with $$n+2$$ carbon atoms and one of hydrogen atoms on each of carbons except the terminal ones are replaced by the $$\text{X}$$ functional group.

Therefore, $$\text{Cl}$$ - alkane - $$2$$ is basically $$2,3 -$$ dichloro butane and $$\text{OH}$$ - alkane - $$3$$ is $$2,3,4 -$$ trihydroxy pentane.

Now, $$\text{COOH}$$ - alkane - $$N$$ is treated with excess $$\text{AgNO}_3$$ to give $$0.1$$ moles of a salt which gives about $$54 \text{ g}$$ of white coloured residue.

Estimate the molar weight of $$\text{Br}$$ - alkane - $$N$$ in grams.

Details and Assumptions:

• The molar weights of $$\text{C}$$, $$\text{H}_2$$, $$\text{O}_2$$ and $$\text{Br}_2$$ are $$12, 2, 32$$ and $$160$$ grams, respectively.
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