(a(i))[1]
Name one further physical property of alkanes that rises as the number of carbon atoms increases.
(a(ii))[2]
State two further characteristics of a homologous series.
(b)[2]
Alkanes commonly undergo combustion and cracking. State the name of one other standard chemical reaction of alkanes and the reactant that must be present for the alkanes to react. type of reaction reactant needed
(c(i))[2]
State two conditions that are needed for cracking alkanes.
(c(ii))[1]
Tridecane, $\text{C}_{13}\text{H}_{28}$, may be cracked to make an alkene containing four carbon atoms plus one other hydrocarbon only. Write an equation for this reaction.
(d)[2]
A hydrocarbon has $88.9\%$ carbon by mass. Calculate the empirical formula for this compound.