2.70 g of aluminium reacts completely with 2.40 g of oxygen to form an oxide of aluminium.
Calculate the empirical formula of the aluminium oxide.
(Relative atomic masses: Al=27.0\text{Al} = 27.0Al=27.0, O=16.0\text{O} = 16.0O=16.0)
You must show your working.
258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.