 # Q82ptsthe reaction ag 2bg cg was allowed to come to

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Q8_(2pts)_The reaction A(g) + 2B(g) C(g) was allowed to come to equilibrium. The initialamounts of reactants placed into a 5.00 L vessel were 1.0 mol A and 1.8 mol B. After thereaction reached equilibrium, 1.0 mol of B was found. Calculate Kcfor this reaction.A)0.060 B) 5.1 C) 17 D) 19 E) 25
Q9_(2pts)_If one starts with pure NO2(g) at a pressure of 0.500 atm, the total pressure insidethe reaction vessel when 2NO2(g) 2NO(g) + O2(g) reaches equilibrium is 0.674 atm.Calculate the equilibrium partial pressure of NO2.
Q10_(2pts)_At 250ºC, the equilibrium constant Kpfor the reaction PCl5(g) PCl3(g) + Cl2(g)is 1.80. Sufficient PCl5is put into a reaction vessel to give an initial pressure of 2.74 atm at250ºC. Calculate the pressure of PCl5after the system has reached equilibrium.
Q11_(2pts)_Hydrogen iodide decomposes according to the equation 2HI(g) H2(g) + I2(g), forwhich Kc= 0.0156 at 400ºC. 0.550 mol HI was injected into a 2.00 L reaction vessel at400ºC. Calculate the concentration of HI at equilibrium.
Q12_(2pts)_Sodium carbonate, Na2CO3(s), can be prepared by heating sodium bicarbonate,NaHCO3(s).2NaHCO3(s) Na2CO3(s) + CO2(g) + H2O(g) Kp= 0.23 at 100ºCIf a sample of NaHCO3is placed in an evacuated flask and allowed to achieve equilibrium at100ºC, what will the total gas pressure be?A)0.46 atm B) 0.96 atm C) 0.23 atm D) 0.48 atm E) 0.11 atm
Q13_(4pts)_At 340 K, Kp= 69 for the reaction H2(g) + I2(g) 2HI(g). 50.0 g of HI is injectedinto an evacuated 5.00-L rigid cylinder at 340 K. What is the total pressure inside the cylinderwhen the system comes to equilibrium?
Q14_(4pts)_15.00 g of solid ammonium hydrogen sulfide is introduced into a 500.-mL flaskat 25°C, the flask is sealed, and the system is allowed to reach equilibrium. What is thepartial pressure of ammonia in this flask if Kp= 0.108 at 25°C for NH4HS(s) NH3(g) + H2(g)?S
Q15_(4pts)_At 700 K, the reaction 2SO2(g) + O2(g) 2SO3(g) has the equilibrium constant Kc= 4.3 106, and the following concentrations are present: [SO2] = 0.10 M; [SO3] = 10. M;[O2] = 0.10 M. Is the mixture at equilibrium? If not at equilibrium, in which direction (as theequation is written),left to rightorright to left, will the reaction proceed to reachequilibrium?

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