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Chapter 1 - Transition Elements and Iron Metallurgy

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Chapter 3 - Chemical Equilibrium

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Quiz

Lesson 1: Chemical Reaction Rates and Le Chatelier’s Principle — Picture questions (exam style)

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  • Questions count: 4
  • Passing grade: 60%
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1.
5 mol N₂O₄ in a 5 L vessel gives 4.0 mol NO₂ at equilibrium. Find Kc.
5 mol N₂O₄ in a 5 L vessel gives 4.0 mol NO₂ at equilibrium. Find Kc.
1.07
5.33
1.33
0.640
2.
For the equilibrium shown (ΔH = 52 kJ), what is the effect of adding a catalyst on Kc and on the position of equilibrium?
For the equilibrium shown (ΔH = 52 kJ), what is the effect of adding a catalyst on Kc and on the position of equilibrium?
Kc decreases, equilibrium shift: forward
Kc decreases, equilibrium shift: backward
Kc unchanged, equilibrium shift: backward
Kc unchanged, equilibrium shift: no shift
3.
5 mol PCl₅ is heated in a 5 L vessel; 3.0 mol dissociates at equilibrium. Find Kc.
5 mol PCl₅ is heated in a 5 L vessel; 3.0 mol dissociates at equilibrium. Find Kc.
1.50
0.360
0.900
4.50
4.
1 mol N₂O₄ in a 2 L vessel gives 0.25 mol NO₂ at equilibrium. Find Kc.
1 mol N₂O₄ in a 2 L vessel gives 0.25 mol NO₂ at equilibrium. Find Kc.
0.0312
0.286
0.0714
0.0357
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