Galvanising is a method of rust prevention where iron is coated with a protective layer of zinc.
An industrial steel I-beam used in construction has a total surface area of 8.4 m2. To protect it from atmospheric corrosion, the beam is to be galvanised.
Calculate the mass of zinc, in kilograms (kg\text{kg}kg), required to coat the surface of this beam with a zinc layer of 450 g m-2.
97 exam-style questions on Edexcel GCSE Chemistry 6.1 Transition metals, alloys and corrosion, covering 6.1.1 Properties of transition metals, 6.1.2 Corrosion and its prevention, and 6.1.3 Alloys and the uses of metals. Each one has a worked solution and a mark scheme showing where the marks go.