Tungsten is extracted from tungsten(VI) oxide, WO3\text{WO}_3WO3. Suppose 150.0 kg150.0\text{ kg}150.0 kg of tungsten(VI) oxide produces a maximum of 118.9 kg118.9\text{ kg}118.9 kg of tungsten. In an industrial reduction process, only 93.5 kg93.5\text{ kg}93.5 kg of tungsten is produced from 150.0 kg150.0\text{ kg}150.0 kg of tungsten(VI) oxide. Calculate the percentage yield of tungsten. Give your answer to 3 significant figures. Use the equation:
percentage yield=mass of product actually mademaximum theoretical mass of product×100 \text{percentage yield} = \frac{\text{mass of product actually made}}{\text{maximum theoretical mass of product}} \times 100 percentage yield=maximum theoretical mass of productmass of product actually made×10031 exam-style questions on AQA GCSE Chemistry 3.3 Yield and atom economy of chemical reactions, covering 3.3.1 Percentage yield and 3.3.2 Atom economy. Each one has a worked solution and a mark scheme showing where the marks go.