Quantitative analysis
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The balanced equation for the extraction of tungsten from tungsten(VI) oxide is

2WO3+3C→2W+3CO2 2\text{WO}_3 + 3\text{C} \rightarrow 2\text{W} + 3\text{CO}_2 2WO3​+3C→2W+3CO2​

Calculate the atom economy of this process to produce tungsten.

atom economy (%)=total formula mass of desired producttotal formula mass of all reactants or products×100 \text{atom economy (\%)} = \frac{\text{total formula mass of desired product}}{\text{total formula mass of all reactants or products}} \times 100 atom economy (%)=total formula mass of all reactants or productstotal formula mass of desired product​×100

Give your answer to 3 significant figures.

(relative atomic masses: C=12\text{C} = 12C=12, O=16\text{O} = 16O=16, W=184\text{W} = 184W=184)

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Quantitative analysis Questions

Practise Edexcel GCSE Chemistry Quantitative analysis with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) 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.

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Quantitative analysis Questions

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