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5.3 Equilibria

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Question 12
F

Hydrogen, iodine and hydrogen iodide are at dynamic equilibrium in a sealed flask.

H2(g)+I2(g)⇌2HI(g) \mathrm{H_{2}(g) + I_{2}(g) \rightleftharpoons 2HI(g)} H2​(g)+I2​(g)⇌2HI(g)

Every second, 6.0 × 1020 molecules of hydrogen iodide break down.

How many molecules of hydrogen react with iodine every second?

[1]
A

0

B

3.0×10203.0 \times 10^{20}3.0×1020

C

6.0×10206.0 \times 10^{20}6.0×1020

D

1.2×10211.2 \times 10^{21}1.2×1021

Markscheme

5.3 Equilibria Questions

  1. GCSE
  2. /Chemistry
  3. /5.3 Equilibria

47 exam-style questions on OCR GCSE Chemistry 5.3 Equilibria, covering 5.3.1 Reversible reactions and dynamic equilibrium and 5.3.2 Changing the position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

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