Atoms, molecules and stoichiometry — practice question

An excess of chlorine was passed through $100\,\text{cm}^3$ of hot $6.0\,\text{mol dm}^{-3}$ sodium hydroxide. What amount, in moles, of sodium chloride would form in the reaction?

• A$0.3$
• B$0.5$
• C$0.6$
• D$1.2$