Tungsten can be produced from tungsten(VI) oxide by reduction with hydrogen gas.
The equation for the reaction is: WO3+3H2→W+3H2OWO_3 + 3H_2 \rightarrow W + 3H_2OWO3+3H2→W+3H2O
Calculate the percentage atom economy for the production of tungsten from tungsten(VI) oxide. Give your answer to 3 significant figures.
Use the equation: Percentage atom economy=Total relative formula mass of desired productTotal relative formula mass of all reactants×100\text{Percentage atom economy} = \frac{\text{Total relative formula mass of desired product}}{\text{Total relative formula mass of all reactants}} \times 100Percentage atom economy=Total relative formula mass of all reactantsTotal relative formula mass of desired product×100
Relative atomic masses (ArA_rAr):
Practise AQA GCSE Chemistry Yield and atom economy of chemical reactions (chemistry only) with exam-style questions for Foundation and Higher tier. 32 questions covering Percentage yield and Atom economy, matched to the AQA GCSE Chemistry (8462) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.