A marine propeller made of cupronickel (a copper-nickel alloy) has a total mass of 125.0 kg. The alloy contains 18.0% by mass of nickel, with the remaining mass being copper.
Calculate the mass of copper in this propeller.
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.