What is the correct chemical formula for $1,2-$dichloro tetrafluoroethane?

The correct $\mathrm{IUPAC}$ name of the following compound is:

$\mathrm{F}-\underset{\stackrel{|}{\mathrm{I}}}{\overset{\underset{|}{\mathrm{H}}}{\mathrm{C}}}-\underset{\stackrel{|}{\mathrm{Br}}}{\overset{\underset{|}{{\mathrm{NO}}_2}}{\mathrm{C}}}-\mathrm{Et}$

Number of chiral carbon persent in the following compound:

$$\begin{gathered} {\mathrm{CH}}_3-\mathrm{CH}-{\mathrm{CH}}_2-\mathrm{CH}-\mathrm{CH}-{\mathrm{CH}}_3 \\ \overline{) \overline{) \overline{)}}} \\ \mathrm{OH} \mathrm{Br} {\mathrm{C}}_2{\mathrm{H}}_5 \end{gathered}$$

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