Deduce the Lewis structure of chloroethene and identify the formula of the repeating unit of the polymer poly(chloroethene).

Alkenes are an economically and chemically important family of organic compounds.

Besides polymerization, state two commercial uses of the reactions of alkenes.

State and explain whether the following molecules are primary, secondary, or tertiary halogenoalkanes.

Consider the following sequence of reactions:

${\mathrm{RCH}}_3\stackrel{\mathrm{reaction} 1}{\to }{\mathrm{RCH}}_2\mathrm{Br}\stackrel{\mathrm{reaction} 2}{\to }{\mathrm{RCH}}_2\mathrm{OH}\stackrel{\mathrm{reaction} 3}{\to }\mathrm{RCOOH}$

${\mathrm{RCH}}_3$ is an unknown alkane in which $\mathrm{R}$ represents an alkyl group.

The alkane contains $81.7\%$ by mass of carbon. Determine its empirical formula, showing your working

Consider the following sequence of reactions:

${\mathrm{RCH}}_3\stackrel{\mathrm{reaction} 1}{\to }{\mathrm{RCH}}_2\mathrm{Br}\stackrel{\mathrm{reaction} 2}{\to }{\mathrm{RCH}}_2\mathrm{OH}\stackrel{\mathrm{reaction} 3}{\to }\mathrm{RCOOH}$

${\mathrm{RCH}}_3$ is an unknown alkane in which $\mathrm{R}$ represents an alkyl group.

Equal volumes of carbon dioxide and the unknown alkane are found to have the same mass, measured to an accuracy of two significant figures, at the same temperature and pressure. Deduce the molecular formula of the alkane.

Consider the following sequence of reactions:

${\mathrm{RCH}}_3\stackrel{\mathrm{reaction} 1}{\to }{\mathrm{RCH}}_2\mathrm{Br}\stackrel{\mathrm{reaction} 2}{\to }{\mathrm{RCH}}_2\mathrm{OH}\stackrel{\mathrm{reaction} 3}{\to }\mathrm{RCOOH}$

${\mathrm{RCH}}_3$ is an unknown alkane in which R represents an alkyl group.

State the reagent and conditions needed for reaction $1$.

Consider the following sequence of reactions:

${\mathrm{RCH}}_3\stackrel{\mathrm{reaction} 1}{\to }{\mathrm{RCH}}_2\mathrm{Br}\stackrel{\mathrm{reaction} 2}{\to }{\mathrm{RCH}}_2\mathrm{OH}\stackrel{\mathrm{reaction} 3}{\to }\mathrm{RCOOH}$

${\mathrm{RCH}}_3$ is an unknown alkane in which R represents an alkyl group.

State the reagent(s) and conditions needed for reaction $3$.

Consider the following sequence of reactions:

${\mathrm{RCH}}_3\stackrel{\mathrm{reaction} 1}{\to }{\mathrm{RCH}}_2\mathrm{Br}\stackrel{\mathrm{reaction} 2}{\to }{\mathrm{RCH}}_2\mathrm{OH}\stackrel{\mathrm{reaction} 3}{\to }\mathrm{RCOOH}$

${\mathrm{RCH}}_3$ is an unknown alkane in which $\mathrm{R}$ represents an alkyl group.

Reaction $1$ involves a free-radical mechanism. Describe the stepwise mechanism, by giving equations to represent the initiation, propagation and termination steps.

Identify the formulas of the organic products, A and B.

${\mathrm{CH}}_3{\left({\mathrm{CH}}_2\right)}_8\mathrm{OH}+{\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7\stackrel{\left[\mathrm{O}\right]}{\to }\mathbf{A}\stackrel{\left[\mathrm{O}\right]}{\to }\mathbf{B}$