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257 solutions

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Q. Calculate the pressures of NO, Cl 2, and NOCl in an equilibrium mixture produced by the reaction of a starting mixture with 4.0 atm NO and 2.0 atm ...

Solved • Nov 1, 2018

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Q. One of the important reactions in the formation of smog is represented by the equationO3(g) + NO(g) ⇌ NO2(g) + O2(g)                   K P = 6.0 × ...

Solved • Nov 1, 2018

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Q. At 1 atm and 25 °C, NO2 with an initial concentration of 1.00 M is 3.3 × 10−3% decomposed into NO and O2. Calculate the value of the equilibrium co...

Solved • Nov 1, 2018

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Q. A 0.72-mol sample of PCl 5 is put into a 1.00-L vessel and heated. At equilibrium, the vessel contains 0.40 mol of PCl3(g) and 0.40 mol of Cl2(g). ...

Solved • Nov 1, 2018

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Q. Complete the changes in concentrations (or pressure, if requested) for the following reaction.

Solved • Nov 1, 2018

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Q. Suppose a 500 mL flask is filled with 1.9 mol of H2 and 1.8 mol of I2. This reaction becomes possible: H2(g) + I2(g) ⇌ 2HI(g) Complete the table be...

Solved • Oct 24, 2018

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Q. In air at 25°C and 1.00 atm, the N2 concentration is 0.01 M and the O2 concentration is 0.033 M. The reactionN2(g) + O2(g) ⇌ 2N0(g) has Kc = 4.8 x ...

Solved • Oct 23, 2018

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Q. At 25°C, the reaction 2NH3(g) ⇌ N2(g) + 3H2(g) has Kc = 2.3 x 10-9. If 0.058 mol NH3 is placed in a 2.06 L container, what will the concentrations ...

Solved • Oct 23, 2018

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Q. During an experiment, 0.294 mol of H2 and 0.294 mol of I2 were placed into a 1.15 liter vessel where the reaction H2(g) + I2(g) ⇌ 2HI(g) came to eq...

Solved • Oct 23, 2018

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Q. Phosphorus pentachloride decomposes according to the chemical equation PCl5 (g) ⇌ PCl3 (g) + Cl2 (g)    Kc = 1.80 at 250°C A 0.179 mol sample of PC...

Solved • Oct 23, 2018

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Q. In a particular experiment, it was found that when O2(g) and CO(g) were mixed and allowed to react according to the equation:2CO(g) + O2(g) ⇌ 2CO2(...

Solved • Oct 23, 2018

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Q. Consider the fllowing reaction. A(aq) ⇌ 2B(aq)             Kc = 3.16 x 10-6 at 500 KIf a 2.80 M sample of A is heated to 500 K, what is the concent...

Solved • Oct 23, 2018

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Q. Carbon disulfide is prepared by heating sulfur and charcoal. The chemical equation is S2(g) + C(s) ⇌ CS2(g)          Kc = 9.40 at 900 K How many gr...

Solved • Oct 23, 2018

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Q. At some temperature, 0.765 moles of NO(g) and 0.400 moles of O2(g) are introduced into a 1.00 L reaction vessel and allowed to come to equilibrium ...

Solved • Oct 23, 2018

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Q. At a certain temperature, 0.960 mol of SO3 is placed in a 4.50-L container. 2SO3(g) ⇌ 2SO2(g) + O2(g) At equilibrium, 0.110 mol of O2 is present. C...

Solved • Oct 23, 2018

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Q. In a study of the formation of NOx air pollution, a chamber heated to 2200°C was filled with air (0.790 atm N2, 0.210 atm O2). What are the equilib...

Solved • Oct 9, 2018

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Q. The value of Kc for the thermal decomposition of hydrogen sulfide, shown below, is 2.2 x 10-4 at 1400 K.2H2S (g) → 2H2 (g) + S2 (g) A sample of gas...

Solved • Oct 9, 2018

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Q. Be sure to answer all parts. The water-gas shift reaction plays a central role in the chemical methods for obtaining cleaner fuels from coal: CO (g...

Solved • Oct 8, 2018

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Q. Enter your answer in the provided box. Hydrogen sulfide decomposes according to the following reaction, for which Kc = 9.30 x 10-8 at 700°C: 2H2S (...

Solved • Oct 8, 2018

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Q. At 473 K, for the elementary reaction 2NOCl (g) k1k-1⇌ 2NO (g) + Cl2 (g)k1 = -7.8 x 10-2 L/mols and k-1 = 4.7 × 102 L2/mol2sA sample of NOCl is pla...

Solved • Oct 5, 2018

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Q. At a certain temperature, 0.3811 mol of N2 and 1.641 mol of H2 are placed in a 3.00-L container. N2 (g) + 3H2 (g) ⇌ 2NH3 (g) At equilibrium, 0.1001...

Solved • Sep 27, 2018

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Q. At a certain temperature, the Kp for the decomposition of H2S is 0.782. H2S (g) ⇌ H2 (g) + S (g) Initially, only H2S is present at a pressure of 0....

Solved • Sep 27, 2018

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Q. Enter your answer in the provided box. Even at high temperatures, the formation of NO is not favored: (Kc = 4.10 x 10-4 at 2,000°C) N2 (g) + O2 (g)...

Solved • Sep 27, 2018

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Q. For the reaction H2 (g) + S (g) ⇌ H2S (g) the initial concentrations are 0.060 M H2, 0.080 MS, and no H2S. At equilibrium, [H] = 0.010 M. Part 1Cal...

Solved • Sep 26, 2018

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Q. Calculate the equilibrium concentrations of N2O4 and NO2 at 25°C in a vessel that contains an initial N2O4 concentration of 0.0376 M The equilibriu...

Solved • Sep 24, 2018

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Q. At a certain temperature, 0.720 mol of SO3 is placed in a 4.50-L container. 2SO3 (g) ⇌ 2SO2 (g) + O2 (g) At equilibrium, 0.110 mol of O2 is present...

Solved • Sep 18, 2018

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Q. The equilibrium constant, Kc, for the following reaction is 10.5 at 350 K. 2CH2Cl2 ⇌ CH4 (g) + CCl4 (g) Calculate the equilibrium concentrations of...

Solved • Sep 18, 2018

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Q. Calculate the equilibrium concentrations of H2, I2 and HI at 500K. The equilibrium constant Kc at 500K for the reaction H2(g) + I2(g) ⇌ 2HI(g) is 129.

Solved • Sep 17, 2018

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Q. Consider the reaction C(s) + CO2(g) ⇌ 2CO(g). When 1.56 mol of CO2 and an excess of solid carbon are heated in a 22.0 L container at 1100K, the equ...

Solved • Sep 17, 2018

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Q. At 100°C, Kc = 4.72 for the reaction 2NO2(g) ⇌ N2O4(g). An empty 10.0 L flask is filled with 9.20 g of NO2 at 100°C. What is the total pressure in ...

Solved • Sep 17, 2018

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Q. Consider the following reaction. A (aq) ⇌ 3B (aq)         Kc = 6.84 x 10-6  at 500 K If a 1.60 M sample of A is heated to 500 K, what is the concen...

Solved • Sep 12, 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)             Kc = 53.3 At this temperat...

Solved • Sep 12, 2018

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Q. At a certain temperature, O.960 mol of SO3 is placed in a 3.00-L container. 2SO3 (g) ⇌ 2SO2 (g) + O2 (g) At equilibrium, 0.130 mol of O2 is present...

Solved • Sep 6, 2018

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Q. Enter your answer in the provided box.The equilibrium constant Kc for the equation 2H2 (g) + CO (g) ⇌ CH3OH (g) is 31 at a certain temperature. If ...

Solved • Sep 3, 2018

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Q. At a certain temperature, the K for the decomposition of H2S is 0.812. H2S (g) ⇌ H2 (g) + S (g) Initally, only H2S is present at a pressure of 0.23...

Solved • Aug 30, 2018

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Q. At a certain temperature, the equilibrium constant, K, for this reaction is 53.3. H2 (s) + I2 (g) ⇌ 2HI (g)           K = 533 At this temperature, ...

Solved • Aug 30, 2018

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Q. Initially, 0.680 mol of A is present in a 4.00-L solution. 2A (aq) ⇌ 2B (aq) + C (aq) At equilibrium, 0.200 mol of C is present. Calculate K.

Solved • Aug 30, 2018

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Q. 0.6 mol of X is placed in an empty 1.00 L flask and the temperature is raised to 282°C. The following reaction takes place: X (g) ⇌ Y (g) + 3Z (g) ...

Solved • Aug 28, 2018

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Q. Consider the following  unbalanced equation at some constant temperature: CO2 (g) ⇌ CO (g) + O2 (g)       K = 5.7 x 10-7 In an experiment, 4.9 mol ...

Solved • Aug 28, 2018

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Q. Consider the following reaction: A (g) ⇌ B (g) + C (g) Find the equilibrium concentrations of A, B, and C for each of the following different value...

Solved • Aug 27, 2018

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Q. Using the Equilibrium constant The reversible chemical reaction A + B ⇌ C + D has the following equilibrium constant. Kc = [C][D]/[A][B] = 2.7 Part...

Solved • Aug 26, 2018

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Q. At a particular temperature, 8.0 mol NO2 is placed into a 1.0-L container and the NO2 dissociates by the reaction. At equilibrium the concentration...

Solved • Aug 14, 2018

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Q. For the reaction, 2 A(g) ⇌ B(g) + 2 C(g), a reaction vessel initially contains only A at a pressure of PA = 264 mmHg. At equilibrium, PA = 66 mmHg....

Solved • Aug 14, 2018

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Q. At a certain temperature, the Kp for the decomposition of H2S is 0.721. H2S(g) ⇌ H2(g) + S(g)Initially, only H2S is present at a pressure of 0.139 ...

Solved • Aug 14, 2018

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Q. At a certain temperature, 0.4611 mol of N2 and 1.541 mol of H2 are placed in a 3.00-L container.At equilibrium, 0.1201 mol of N2 is present. Calcul...

Solved • Aug 14, 2018

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Q. A mixture of 0.1000 mol of CO2, 0.1000 mol of H2, and 0.1000 mol of H2O is placed into a 2.000-L vessel. The following equilibrium is established: ...

Solved • Aug 14, 2018

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Q. Consider the reaction: N2(g) + O2(g) ⇌ 2 NO(g) for which Kc = 0.10 at 2,000°C. Starting with initial concentrations of 0.15 M N2 and 0.15 M O2, det...

Solved • Aug 14, 2018

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Q. The value of Kc for the thermal decomposition of hydrogen sulfide, shown below, is 2.2 x 10-4 at 1400 K.2H2S(g) ⇌ 2H2(g) + S2(g)A sample of gas in ...

Solved • Aug 13, 2018

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Q. Calculate the value of the change in concentration from initial conditions to equilibrium ("x" in your ICE chart) for the products of the faollowin...

Solved • Aug 13, 2018

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Q. At a certain temperature, 0.740 mol of SO3 is placed in a 5.00-L container. 2SO3(g) ⇌ 2SO2(g) + O2(g) At equilibrium, 0.100 mol of O2 is present. C...

Solved • Aug 13, 2018

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Q. The value of Kc for the reaction:N2O4 (g) ⇌ 2NO2 (g)is 0.53 at 461.5 K. Part 1 If a reaction vessel at that temperature initially contains 0.0251 M...

Solved • Aug 9, 2018

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Q. An equilibrium mixture contains 0.700 mol of each of the products (carbon dioxide and hydrogen gas) and 0.200 mol of each of the reactants (carbon ...

Solved • Aug 7, 2018

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Q. When 1.00 mol of A and 0.800 mol of B are placed in a 2.00 L container and allowed to come to equilibrium, the resulting mixture is found to be 0.2...

Solved • Aug 1, 2018

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Q. The reaction CO2 (g) + C (s) ⇌ 2CO (g) has Kp = 5.78 at 1200 K. Part ACalculate the total pressure at equilibrium when 4.62 g of CO2 is introduced ...

Solved • Aug 1, 2018

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Q. The equilibrium constant Kc = 49 for the reaction: PCl3 (g) + Cl2 (g) ⇌ PCl5 (g) at 230 °C. If 0.70 mol of PCl3 is added to 0.70 mol of Cl2 in a 1....

Solved • Aug 1, 2018

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Q. At 25 °C, the equilibrium constant Kc = 65 for the reaction 2A (aq) = B (aq) + C (aq) at 298K. If 2.50 mol of A is added to enough water to prepare...

Solved • Aug 1, 2018

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Q. A mixture of 0.500 mole of carbon monoxide and 0.400 mole of bromine was placed into a rigid 1.00-L container and the system was allowed to come to...

Solved • Aug 1, 2018

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Q. Be sure to answer all parts.The equilibrium constant Kc for the decomposition of phosgene, COCI2, is 4.63 x 10-3 at 527 °C: COCI2 (g) ⇋ CO (g) + CI...

Solved • Jul 31, 2018

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Q. Be sure to answer all parts.The equilibrium constant Kc for the reaction below is 0.00209 at a certain temperature. Br2 (g) ⇌ 2Br (g) If the initia...

Solved • Jul 31, 2018

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Q. At a certain temperature, the equilibrium constant for the following chemical equation is 3.90. SO2 (g) + NO2 (g) ⇌ SO3 (g) + NO (g) At this temper...

Solved • Jul 31, 2018

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Q. Consider the following reaction. A (aq) ⇌ 2B (aq)   Kc = 9.53 x 10-6 at 500 K If a 4.00 M sample of A is heated to 500 K, what is the concentration...

Solved • Jul 30, 2018

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Q. Part BThe following reaction was performed in a sealed vessel at 751°C: H2 (g) + I2 (g) ⇌ 2HI (g) Initially, only H2 and I2 were present at concent...

Solved • Jul 26, 2018

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Q. 2.0 mol each of PCl5, PCl3, and Cl2 are placed in a 2.0L reaction vessel at 620K. Kc for the reaction PCl5(g) ⇌ PCl3(g) + Cl2(g) is 0.60 at the giv...

Solved • Jul 25, 2018

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Q. 1.0 mol each of H2, I2, and HI are placed in a 2.0L reaction vessel at 1200K. Kc for the reaction H2(g) + I2(g) ⇌ 2Hl(g) is 4.6 at the given temper...

Solved • Jul 25, 2018

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Q. A 4.0L reaction flask initially contains 4.0 mol of SO3 at 400K. Sulfur dioxide and oxygen form: 2SO3(g) ⇌ 2SO2(g) + O2(g)After equilibrium is esta...

Solved • Jul 25, 2018

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Q. Suppose a 500. mL flask is filled with 2.0 mol of N2 and 1.5 mol of NH3. This reaction becomes possible: N2 (g) + 3H2 (g) ⇌ 2NH3 (g) Complete the t...

Solved • Jul 25, 2018

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Q. At a certain temperature, the Kp for the decomposition of H2S is 0.859. H2S (g) ⇌ H2 (g) + S (g) Initially, only H2S is present at a pressure of 0....

Solved • Jul 24, 2018

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Q. The equilibrium constant Kc = 1.1 x 10-2 for the following reaction at 400 K: PCl5 (g) ⇌ PCl3 (g) + Cl2 (g) (a) Given that 1.0 g of PCl5 was initia...

Solved • Jul 17, 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 K How many gram...

Solved • Jul 11, 2018

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Q. At a certain temperature, the Kp for the decomposition of H2S is 0.818. H2S (g) ⇌ H2 (g) + S (g) Initially, only HS is present at a pressure of 0.2...

Solved • Jul 11, 2018

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Q. At equilibrium, the concentrations in this system were found to be [N2] = [O2] = 0.200 M and [NO] = 0.400 M. N2 (g) + O2 (g) ⇌ 2NO(g) If more NO is...

Solved • Jul 10, 2018

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Q. At a certain temperature, the Kp for the decomposition of H2S is 0.821. H2S (g) ⇌ H2 (g) + S (g) Initially, only H2S is present at a pressure of 0....

Solved • Jul 10, 2018

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Q. Carbon disulfide is prepared by heating sulfur and charcoal. The chemical equation is S2 (g) + C (s) ⇌ CS2 (g)       Kc = 9.40 at 900 K How many gr...

Solved • Jul 10, 2018

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Q. At a certain temperature, 0.4811 mol of N2 and 1.581 mol of H2 are placed in a 4.00-L container. N2 (g) + 3H2 (g) ⇌  2NH3 (g) At equilibrium, 0.140...

Solved • Jul 10, 2018

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Q. Be sure to answer all parts.The equilibrium constant Kc for the reaction H2 (g) + Br2 (g) ⇋ 2HBr (g) is 2.180 x 106 at 730°C. Starting with 2.20 mo...

Solved • Jul 5, 2018

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Q. At a certain temperature, 0.326 m of CH 4 and 0.941 mol of H2O is placed in a 2.50 L container. CH4(g) + 2H2O(g) ⇌ CO2(g) + 4H2(g) At equilibrium, ...

Solved • Jul 3, 2018

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Q. At a certain temperature, 0.4811 mol of N2 and 1.601 mol of H2 are placed in a 2.00-L container. N2 (g) + 3H2 (g) ⇌ 2NH3 (g) At equilibrium, 0.1201...

Solved • Jul 3, 2018

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Q. At a certain temperature, the equilibrium Constant, Ko, for this reaction is 53.3. H2(g) + I2(g) ⇌ 2HI(g) Kc = 53.3 At this temperature, 0.300 mol ...

Solved • Jun 26, 2018

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Q. At a certain temperature, 0.920 mol of SO3 is placed in a 3.50-L container. 2SO3(g) ⇌ 2SO2(g) + O2(g) At equilibrium, 0.120 mol of O2 is present. C...

Solved • Jun 26, 2018

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Q. At 200 °C, the equilibrium constant (Kp) for the reaction below is 2.40 x 10 3. 2NO (g) <-> N2 (g) + O2 (g) A closed vessel is initially char...

Solved • Jun 25, 2018

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Q. Consider the formation of hydrogen fluoride: H2 (g) + F2 (g) <-> 2HF (g) If a 3.0 L nickel reaction container (glass cannot be used because i...

Solved • Jun 25, 2018

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Q. For the reaction 2HI (g) <-> H2 (g) + I2 (g)      Keq = 0.016 Initially a container contains 0.60 M HI, 0.038 M H 2, and 0.15 M I 2 at equili...

Solved • Jun 25, 2018

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Q. For the reaction in the previous problem, that is 2HI (g) <-> H2 (g) + I2(g)        Keq = 0.016 Initially a container contains 0.37 M HI and ...

Solved • Jun 25, 2018

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Q. Consider the following reaction. A (aq) ⇌ 2B (aq)      K c = 4.70 x 10 -6 at 500 K If a 4.10 M sample of A is heated to 500 K, what is the concentr...

Solved • Jun 19, 2018

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Q. Before any reaction occurs, the concentration of A in the reaction below is 0.049 M. What is the equilibrium constant if the concentration of A at ...

Solved • Jun 19, 2018

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Q. If a solution with initial concentrations of PCl 3 and Cl2 both equaling 2.50 x 10 -3 M before reaction gives an equilibrium concentration of PCl3 ...

Solved • Jun 19, 2018

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Q. Before any reaction occurs, the concentration of A In the reaction below is 0.0510 M. What is the equilibrium constant if the concentration of A at...

Solved • Jun 19, 2018

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Q. 5.00 mol of solid A placed in a seated 1.00-L container and allowed to decompose in gaseous B and C. The concentration of B increased until it reac...

Solved • Jun 18, 2018

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Q. At equilibrium, the concentrations in this system were found to be [N 2] = [O2] = 0.100 M and (NO) = 0.400 M. N2 (g) + O2 (g) ⇌ 2NO (g) If more NO ...

Solved • Jun 18, 2018

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Q. Consider the following reaction. A (aq) ⇌ 2B (aq)               K  c = 7.11 x 10 -6 at 500 Klf a 4.20 M sample of A is heated to 500 K, what is the...

Solved • Jun 18, 2018

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Q. Carbon disulfide is prepared by heating sulfur and charcoal. The chemical equation is S2 (g) + C (s) ⇌ CS2 (g)        K c = 9.40 at 900 K How many ...

Solved • Jun 18, 2018

ICE Chart

Q. At a certain temperature, the Kp for the decomposition of H2S is 0.727. H2S (g) ⇌ H2 (g) + S (g) Initially, only H2S is present at a pressure of 0....

Solved • Jun 18, 2018

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Q. Phosphorus pentachloride decomposes according to the chemical equation PCl5 (g) ⇌ PCl3 (g) + Cl2(g)                 K c = 1.80 at 250 °C.A 0.162 mo...

Solved • Jun 18, 2018

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Q. At a certain temperature, the equilibrium constant for the following chemical equation is 3.80. SO2 (g) + NO2 (g) ⇌ SO3 (g) + NO (g) At this temper...

Solved • Jun 18, 2018

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Q. A mixture initially contains A, B, and C in the following concentrations: [A] = 0.350 M, [B] = 1.40 M, and [C] = 0.700 M. The following reaction oc...

Solved • Jun 14, 2018

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Q. At equilibrium, the concentrations in this system were found to be [N 2] = [O2] = 0.100 M and [NO] = 0.500 M. N2(g) + O2(g) ⇌ 2NO(g) If more NO is ...

Solved • Jun 12, 2018

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Q. When HNO2 is dissolved in water it partially dissociates according to the equation HNO2 ⇌ H+ + NO2-. A solution is prepared that contains 3.000 g o...

Solved • Jun 6, 2018

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Q. Suppose a 500. mL flask is filled with 1.5 mol of H 2O, 0.20 mol of CO2 and 1.2 mol of H2. The following reaction becomes possible: CO (g) + H2O (g...

Solved • May 31, 2018

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Q. At a certain temperature, the equilibrium constant for the following chemical equation is 3.50. SO2(g) + NO2(g) ⇌ SO3(g) + NO(g) At this temperatur...

Solved • May 30, 2018

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Q. Consider the following reaction. 2A(g) ⇌ B(g)    Kp = 4.84 x 10 -5 at 500 KIf a sample of A(g) at 1.90 atm is heated to 500 K, what is the pressure...

Solved • May 30, 2018