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6.2 Quantitative analysis

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Question 50

In a study of a gas-phase reaction, 18 cm3 of gas X reacts exactly with 54 cm3 of gas Y and produces 36 cm3 of gas Z. The temperature and pressure are kept constant for all three measurements.

Which equation is consistent with these results?

[1]
A

X(g)+2Y(g)→3Z(g)\mathrm{X(g)+2Y(g)\rightarrow3Z(g)}X(g)+2Y(g)→3Z(g)

B

X(g)+3Y(g)→2Z(g)\mathrm{X(g)+3Y(g)\rightarrow2Z(g)}X(g)+3Y(g)→2Z(g)

C

3X(g)+Y(g)→2Z(g)\mathrm{3X(g)+Y(g)\rightarrow2Z(g)}3X(g)+Y(g)→2Z(g)

D

X(g)+3Y(g)→Z(g)\mathrm{X(g)+3Y(g)\rightarrow Z(g)}X(g)+3Y(g)→Z(g)

Markscheme

6.2 Quantitative analysis Questions

  1. GCSE
  2. /Chemistry
  3. /6.2 Quantitative analysis

151 exam-style questions on Edexcel GCSE Chemistry 6.2 Quantitative analysis, covering 6.2.1 Concentration in mol dm⁻³ and titration calculations, 6.2.2 Percentage yield and why actual yield falls short, 6.2.3 Atom economy of a reaction, 6.2.4 Choosing a reaction pathway, and 6.2.5 Molar volume of gases and Avogadro's law. Each one has a worked solution and a mark scheme showing where the marks go.

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