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257 solutions

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Q. Consider the following reaction. 2A(g) ⇌ B(g)    Kp = 2.42 x 10 -5 at 500 KIf a sample of A(g) at 3.50 bar is heated to 500 K, what is the pressure...

Solved • May 30, 2018

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Q. Phosphorus pentachloride decomposes according to the chemical equation PCI5(g) ⇌ PCI3(g) + Cl2(g)         Kc = 1.80 at 250°C A 0.250 mol sample of ...

Solved • May 30, 2018

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Q. At a certain temperature, 0.740 mol of SO3 is placed in a 3.00-L container. 2SO3(g)  ⇌ 2SO2(g) + O2(g)At equilibrium, 0.170 mol of O2 is present. C...

Solved • May 29, 2018

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Q. The equilibrium constant Kc for the reactionH2(g) + I2(g) ⇌ 2HI(g)is 54.3 at 430 C. At the start of the reaction, there are 0.714 mole of H_2, 0.98...

Solved • May 21, 2018

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Q. A 0.682- g sample of ICl(g) is placed in a 625 - mL reaction vessel at 682 K. When equilibrium is reached between the ICl(g) and I2 (g) and Cl2(g) ...

Solved • May 21, 2018

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Q. The equilibrium constant Kc for the reaction:C ⇌ D + E is 8.10 x10-5. The initial composition of the reaction mixture is [C} = [D] = [E] =   1.10x1...

Solved • May 20, 2018

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Q. A key step in the extraction of iron from its ore isFeO(s) + CO (g) ⇌ Fe (s) + CO2 (g) Kp = 0.403 at 1, 000°CThis step occurs in the 700°C to 1, 20...

Solved • May 12, 2018

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Q. For the reactionH2(g) + CO2(g) ⇌ H2O(g) + CO(g)at 700°C, Kc = 0.534. Calculate the number of moles of H 2 that are present at equilibrium if a mixt...

Solved • Apr 29, 2018

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Q. A Student ran the following reaction in the laboratory at 502 K:PCl3(g) + Cl2(g) ⇌ PCl5(g)When she introduced 0.199 moles of PCI3(g) and 0.235 mole...

Solved • Apr 6, 2018

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Q. The equilibrium constant, Kc, for the following reaction is 7.00 x 10^-5 at 673 K.NH4I(s) NH3(g) + HI(g)Calculate the equilibrium concentration of ...

Solved • Apr 6, 2018

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Q. Nitrosyl bromide, NOBr, is formed in the reaction of nitric oxide, NO, with bromine, Br2 2NO(g) + Br2(g)⇌ 2NOBr(g) The reaction rapidly establishes...

Solved • Apr 3, 2018

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Q. For the exothermic reactionPCl3(g) + Cl2(g) ⇌ PCl5(g)     Kp = 0.180 at a certain temperature.A flask is charged with 0.500 atm PCl3, 0.500 atm Cl2...

Solved • Mar 26, 2018

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Q. The system described by the reactionCO(g) + Cl2(g) ⇌ COCl2(g)is at equilibrium at a given temperature when  PCO =0.31 atm , PCl2 = 0.11 atm , and P...

Solved • Mar 23, 2018

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Q. Consider the following reaction:2NO(g) + Br2(g) ⇌ 2NOBr(g)Kp= 28.4 at 298 KIn a reaction mixture at equilibrium, the partial pressure of NO is 107 ...

Solved • Mar 21, 2018

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Q. For the reaction, CO(g) + Cl2(g) ⇌ COCl2(g)       Kc = 255 at 1000 K. If a reaction mixture initially contains a CO concentration of 0.1550 M and a...

Solved • Mar 20, 2018

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Q. Consider the following reaction:SO2Cl2(g) ⇌ SO2(g) + Cl2(g)Kc = 2.99 × 10−7 at 227∘CIf a reaction mixture initially contains 0.177 M SO2Cl2, what i...

Solved • Mar 14, 2018

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Q. At a certain temperature, the equilibrium constant,  Kc for this reaction is 53.3.H2(g) + I2(g) ⇌ 2HI(g)At this temperature, 0.300 mol of H2 and 0....

Solved • Feb 20, 2018

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Q. At a certain temperature, the equilibrium constant, Kc, for this reaction is 53.3. H2(g) + I2(g) ⇌ 2HI(g) At this temperature, 0.400 mol of H2 an...

Solved • Feb 19, 2018

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Q. The equation for the formation of hydrogen iodide from H 2 and I2 is:H2(g) + I2(g) ⇌ 2HI(g)The value of Kp for the reaction is 71 at 710.0 °C. What...

Solved • Feb 16, 2018

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Q. Carbon disulfide is prepared by heating sulfur and charcoal. The chemical equation isS2(g) + C(s) → CS2(g)          Kc = 9.40 at 900 KHow many gram...

Solved • Feb 15, 2018

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Q. Phosphorus pentachloride decomposes according to the chemical equation.PCl5(g) ⇌ PCI3(g) + Cl2(g)             Kc = 1.80 at 250 °CA 0.250 mol sample...

Solved • Feb 13, 2018

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Q. Ammonium Iodide dissociates reversibly to ammonia and hydrogen iodide:NH4I(s) ⇋ NH3(g) + HI(g)Kp = 0.215 at 400°CIf 150 g of ammonium iodide is pla...

Solved • Dec 19, 2017

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Q. At a certain temperature, the equilibrium constant K c for this reaction is 53.3.H2 + I 2 → 2 HIAt this temperature, 0.800 mol of H2 and 0.800 mol ...

Solved • Sep 23, 2017

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Q. At a certain temperature, the Kc of the reaction below is 1.5 x10 −11. If 0.10 mol N2 and 0.10 mol O2 are reacted together in a 1.00 L container, h...

Solved • Aug 7, 2017

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Q. When excess PbCl2 is dissolved in 1.00 L of water, 0.032 mol of Cl − forms at equilibrium. What is the Kc of the reaction: PbCl2 (s) ⇌ Pb2+ (aq) +...

Solved • Aug 7, 2017

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Q. At a certain temperature, 0.91 mol of NO is placed in a 1.0 L vessel. Once the equilibrium is established, 0.22 mol of each product is present. Wha...

Solved • Aug 7, 2017

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Q. Phosphorus pentachloride decomposes to phosphorus trichloride at high temperatures according to the equation: PCl5(g) ⇌ PCl3(g) + Cl2(g) At 250° ...

Solved • Jun 28, 2017

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Q. A hypothetical reaction is shown below. 2A(g) +B2(g) ↔ 2C(g). A flask of 1 L volume is charged with 0.382 mol A and 0.0952 mol of B2 and allowed to...

Solved • Apr 28, 2017

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Q. At a certain temperature, A2 and B2 react to give AB as follows:A2 (g) + B2 (g) ⇌ 2 AB (g)                            K   c = 0.354If an 8.00 L fla...

Solved • Apr 28, 2017

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Q. For the reaction: H 2 (g) + Br 2 (g) ⇌ 2 HBr (g), K c = 7.5 × 10 2 at a certain temperature. If 2 mole each of H 2 and Br 2 are placed in 2-L flas...

Solved • Mar 22, 2017

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Q. 1.75 moles of H2O2 were placed in a 2.50 L reaction chamber at 307ºC.  After equilibrium was reached, 1.20 moles of H2O2 remained.  Calculate the e...

Solved • Mar 22, 2017

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Q. Practice: Consider the famous ammonia preparation3 H2(g) + N2(g) ⇌ 2 NH3(g)The equationK = [x]2 / [0.1 − 3x]3 [0.7 − x]is not a possible correct de...

Solved • Mar 16, 2017

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Q. A 2.00 liter vessel is filled with NH 3 (g) to a pressure of 4.00 atm and the reactionN2 (g) + 3 H2 (g) ⇌ 2 NH3 (g)comes to equilibrium at a fixed ...

Solved • Feb 27, 2017

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Q. A 1.000 L vessel is filled with 2.000 moles of N 2, 1.000 mole of H2, and 2.000 moles of NH3. N2 (g) + 3 H2 (g) ⇌ 2 NH3 (g)When the reaction comes ...

Solved • Feb 24, 2017

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Q. Consider the reaction below:CaS (aq) + MgSO4 (aq) ↔ CaSO4 (s) + MgS (aq)If K is 20 and the initial concentrations of CaS, MgSO4 and MgS are 0.5 M, ...

Solved • Feb 24, 2017

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Q. At a certain temperature, 0.0740 mol of PCl 5(g) were introduced into a one-liter container.PCl5(g) ⇋ PCl3(g) + Cl2(g)At equilibrium the concentrat...

Solved • Feb 23, 2017

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Q. The reaction NO2 (g)  +  NO (g)  ⇌   N2O (g)  +   O2 (g) reached equilibrium at a certain high temperature. Originally the reaction vessel containe...

Solved • Feb 21, 2017

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Q. A 5.0 L evacuated flask is charged with 2.0 moles of CO 2 and 1.5 moles of H 2 is allowed to come to equilibrium at 25 oC. If the equilibrium const...

Solved • Feb 17, 2017

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Q. A container initially contains [Br2] = 0.1 M and [I 2] = 0.2 M and undergoes the reaction:Br2 (g) + I 2 (g) ⇌ 2 BrI (g)     Kc = 1x10–10 at 25 °C:C...

Solved • Oct 17, 2016

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Q. Consider the following reaction:COCl2 (g) ⇌ CO (g) + Cl2 (g)A reaction mixture initially contains 1.6 M COCl 2. Determine the equilibrium concentra...

Solved • Sep 16, 2016

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Q. A reaction mixture initially contains [N2O4] = 0.0250M. Find the equilibrium concentration of NO2.N2O4(g) ⇌ 2NO2(g)                                ...

Solved • Sep 16, 2016

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Q. Consider the following reaction:Fe3+(aq) + SCN-(aq) ⇌ FeSCN2+(aq)A solution is made containing an initial [Fe3+] of 1.1 x 10-3M an initial [SCN-] o...

Solved • Aug 25, 2016

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Q. Consider the following reaction:CH4 (g) + 2H2S (g) ↔ CS2 (g) + 4H2 (g)A reaction mixture initially contains 0.680 M CH 4 and 0.520 M H2S. When equi...

Solved • Aug 25, 2016

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Q. A flask is filled with sulfuryl chloride, SO2Cl2 and has an initial concentration of 0.168 M. If the flask is allowed to come to equilibrium accord...

Solved • Aug 25, 2016

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Q. Consider the reaction shown below at 2200 °CN2 (g) + O2 (g) ↔ 2 NO (g)        K c = 0.0505A student adds 0.375 mol of N2 and 0.375 mol of O2 to a 2...

Solved • Aug 25, 2016

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Q. Consider the following reaction at 425 KBr2 (g) + Cl2 (g) ⇌ 2 BrCl (g)    Kc = 5.81If a 5.00 L reaction vessel in initially charged with 4.65 moles...

Solved • Aug 25, 2016

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Q. A flask is filled with 1.08 atm of oxygen gas and 0.88 atm of ammonia and the following reaction is allowed to come to equilibrium in the closed co...

Solved • Aug 25, 2016

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Q. A mixture consisting of 0.250 M N2(g) and 0.500 M H2 (g) reaches equilibrium according to the equation N2(g) + 3 H2(g) → 2 NH3(g)At equilibrium, th...

Solved • Aug 17, 2016

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Q. Carbon monoxide gas reacts with hydrogen gas at elevated temperatures to form methanol according to this equation.CO (g) + 2 H2 (g) ⇋ CH3OH (g)When...

Solved • May 10, 2016

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Q. Consider this reactionAB3(g) ⇌ A(g) + 3B(g) What is the equilibrium constant expression if the intial concentration of  AB3 is 0.1 M and the equili...

Solved • Apr 26, 2016

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Q. For the equilibrium, SO2(g) + NO2(g) ⇌ SO3(g) + NO(g) The four gases are mixed in a container in the following partial pressures (in atmospheres)...

Solved • Apr 12, 2016

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Q. A mixture of 1.00 atm of NO, 0.50 atm of H 2, and 1.00 atm of N2 was allowed to reach equilibrium according to the reaction given below (initially ...

Solved • Apr 12, 2016

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Q. Carbon monoxide gas reacts with hydrogen gas at elevated temperatures to form methanol according to this equation: CO (g) + 2 H2 (g) ⇌ CH3OH (g). W...

Solved • Mar 16, 2016

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Q. When heated at high temperatures, a diatomic vapor dissociates as follows: A2 (g) ⟺ 2A (g) In one experiment, a chemist finds that when 0.0520 mo...

Solved • Feb 24, 2016

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Q. If a 10.0 L vessel is charged with 0.482 mol N 2, 0.933 mol O2, calculate the concentration of each species at equilibrium.2 N2 + O2 ⇌ 2 N2O       ...

Solved • Feb 21, 2016

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Q. What is the amount of "C" at equilibrium when 1 mole of A and 1 mole of B react according to the chemical reaction: 2 A + 2 B ⇌ C ?a. between 0 and...

Solved • Feb 21, 2016

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Q. The equilibrium constant for the reaction below at 25°C is 4.8 x 10 -6. Calculate the equilibrium concentration (mol/L) of Cl2 (g) if the initial c...

Solved • Feb 21, 2016