Equilibrium Expression Practice

Which is the correct equilibrium constant expression for the following reaction?

Fe₂O_3(s) + H_2(g) —> Fe_(s) + H₂O_(g)

• K = [H₂O]3 / [H₂]³

• K = [Fe₂O₃] [H₂]³ / [Fe]²[H₂O]³

• K = [Fe]²[H₂O]³ / [Fe_2O₃] [H₂]³

• K= [Fe] [H₂O] / [Fe₂O₃] [H₂]

• K = [H₂O] / [H₂]

Tags

NGSS.HS-PS1-7

The equilibrium constant expression for the reaction BrF_5(g) —> Br_2(g) + F_2(g) is

• Kc = [Br₂] [F₂] / [BrF_5]

• Kc = [BrF₅]² / [Br₂][F₂]⁵

• Kc = [Br₂] [F₂]⁵ / [BrF₅]²

• Kc = 2[BrF₅]² / ([Br₂] × 5[F₂]⁵)

• Kc = [Br₂] [F₂]² / [BrF₅]⁵

What is the K_eq expression for this reaction?

2 NO_(g) + O_2(g) ⇌ 2 NO_2(g)

• K_c = [NO₂]² / [NO]² [O₂]

• K_c = [NO]² [O₂] / [NO₂]²

• K_c = [NO]² [O₂] [NO₂]²

• K_c = [NO₂]² / [NO]² + [O₂]

Tags

NGSS.HS-PS1-6

Consider the following reaction. What would be the equilibrium constant expression?

4Br₂(g) + CH₄(g) ↔ 4HBr(g) + CBr₄(g)

What is the K_c expression for this reaction?
   2 NO_(g)  +  O_2(g) ⇌  2 NO_2(g)

N₂O₄(g) ⇌ 2 NO₂(g) What is the concentration equilibrium constant expression?

What is the equilibrium-constant expression for  CO₂(g) + H₂(g) ⇌ CO(g) + H₂O(l)

Tags

NGSS.HS-PS1-6

What is the reaction/equation for this K_c expression_

• 2N₂ + O₂ ⇌ 2NO

• N₂ + O₂ ⇌ NO

• NO ⇌ 2NO

• N₂ + O₂ ⇌ 2NO

What is the equation/reaction for this Kc expression?

• O₃ ⇌ 3O₂

• 2O₃ ⇌ 3O₂

• 2O₃ ⇌ O₂

• 3O₂ ⇌ 2O₃

At elevated temperatures ammonium carbonate, NH₂COONH₄, is in equilibrium with NH₃ and CO₂ according to the equation;

NH₂COONH₄(s) ⇌ 2 NH₃(g) + CO₂(g)

What is the equilibrium expression for this reaction?