Explain why chlorine is a liquid at $-50^\circ\text{C}$.
Describe how chlorine molecules are arranged and how they move at $-50^\circ\text{C}$.
A chlorine gas sample contains $1.204 \times 10^{20}$ molecules. One mole of chlorine gas contains $6.02 \times 10^{23}$ molecules. Calculate the mass of this chlorine gas sample.
State the oxidation number of chlorine in $\text{Cl}_2$ and in $\text{Cl}^-$.
Chlorine is reduced during the reaction. Explain why, using ideas about electrons.
The temperature of the equilibrium mixture is increased. State and explain what happens to the acidity of the equilibrium mixture.
HCl(aq) is a strong acid and HOCl(aq) is a weak acid. Describe how a strong acid differs from a weak acid.
A chloride of iron contains $34.5\%$ iron by mass. Calculate the empirical formula of this chloride. Show your working.