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Date May 2019 Marks available 1 Reference code 19M.1.hl.TZ1.22
Level HL Paper 1 Time zone TZ1
Command term Question number 22 Adapted from N/A

Question

Kc for 2N2O (g) 2N2 (g) + O2 (g) is 7.3 × 1034.

What is Kc for the following reaction, at the same temperature?

N2 (g) + 1 2 O2 (g) N2O (g)

 

A. 7.3 × 1034

B.  1 7.3 × 10 34

C.  1 7.3 × 10 34

D.  1 2 × 7.3 × 10 34

Markscheme

B

Examiners report

Candidates scored well while one teacher thought it was a trick question and particularly tough. Relationship between K values on reversed equations should be understood.

Syllabus sections

Core » Topic 7: Equilibrium » 7.1 Equilibrium
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Core » Topic 7: Equilibrium
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