2C2H2(g) + 5O2(g)  4CO2(g) + 2H2O(g) You have 0.4 moles C2H2 and 0.2 moles O2 present initially in a 5L flask. You allow the reaction to run until it reaches equilibrium. Which of the following is the correct ICE table for this process?

If the equilibrium constant of a given reaction is 7.90, what is the equilibrium constant of its reverse reaction? tv 14 MacBook Air DII FO 888 F6 F4 esc F2 F3 F1 & @ # $ 7 2 R T Y W S F つ

Question 41 of 44 Consider the equilibrium system described by the chemical reaction below, which has a value of Kc equal to 7.1 x 10 at a certain temperature. If a solid sample of CaCrO4 dissolves in solution, what will the equilibrium concentration of Ca in the solution be? CaCrO.(s)= Ca (aq) + CrO (aq) NEXT Based on the given values, set up ICE table in order to determine the unknown. CaCrO-(s) Ca-(aq) CrO. (aq) Initial (M) Change (M) +2x +2x Equilibrium (M) 7.1 x 10-2x +2x +2x RESET 7.1 x 10 +2x -2x 7.1 x 10 +* 7.1 x 10-r 7.1x 10+ 2x 7.1x 10-2x

Iron(III) oxide and hydrogen react to form iron and water, like this: Fe,O3(s)+3 H2(9)–→2 Fe(s)+3 H,O(g) At a certain temperature, a chemist finds that a 4.5 L reaction vessel containing a mixture of iron(III) oxide, hydrogen, iron, and water at equilibrium has the following composition: compound amount Fe,O3 3.54 g H2 3.20 g Fe 4.49 g H,O 1.06 g Calculate the value of the equilibrium constant K_ for this reaction. Round your answer to 2 significant digits.