# The equilibrium constant (Keq) is the ratio of ____ concentrations to ____ concentrations at equilibrium, with each concentration raised to a power equal to the number of ____ of that substance in the balanced chemical equation.

29,639 results, page 19
1. ## Managerial Economics

2)The manager of All City realtors wants to hire some real estate agents to specialize in selling housing units acquired by the Resolution Trust Commission (RTC) in its attempt to bail out the savings and loan industry. The commission paid by RTC to the
2. ## Chemistry(the)

An optically active compound having molecular formula C6H12O6 is found in two isomeric forms (A) and (B) in nature. When (A) and (B) are dissolved in water they show the following equilibrium. (A) Equilibrium mixture (B) D = 1110 52.20 19.20 (i) What are
3. ## chemistry - equilibria

1. A(aq) + B(aq) ¡ê C(aq) + D(aq) Initially, 1 mol of A and 1 mol of B are allowed to react and come to equilibrium. It is found hat there is 0.5 mol of A left at equilibrium. Calculate Kc for the reaction. how do i work out Kc? when ive done questions
4. ## Chemistry

Compare the g/L solubility of CaCO3 in pure water, a H3O+ (aq) solution with a PH of 3.00 and a H30+(aq) solution with a pH of 1.00. Ksp for CaCO3 is 3.36 x 10^-9 CaCO3 (s) + H3O (aq) = Ca (aq) + HCO3 (aq) + H2O (l) (equilibrium equation) Keq= 71 I knew
5. ## Chemistry!

Consider the equilibrium system: N204 (g) = 2 NO2 (g) for which the Kp = 0.1134 at 25 C and deltaH rx is 58.03 kJ/mol. Assume that 1 mole of N2O4 and 2 moles of NO2 are introduced into a 5 L contains. What will be the equilibrium value of [N204]? Options
6. ## Physics

A cork gun contains a spring whose spring constant is 18.0 N/m. The spring is compressed by a distance ∆X = 6.0 cm and used to propel a cork of mass 7.66 g from the gun. Assuming the cork is released when the spring passes through its equilibrium
7. ## Physics

A diver (mass = 75.0 kg) walks to the end of a flexible diving board. The end of the board bends down a distance of 0.55 m. The diver's weight on the diving board makes it behave like a spring. a) Determine the spring constant of the diving board. b)
8. ## Physics

A cork gun contains a spring whose spring constant is 18.0 N/m. The spring is compressed by a distance ∆X = 6.0 cm and used to propel a cork of mass 7.66 g from the gun. Assuming the cork is released when the spring passes through its equilibrium
9. ## physics

A cork gun contains a spring whose spring constant is 11.0 N/m. The spring is compressed by a distance DX = 9.8 cm and used to propel a cork of mass 6.60 g from the gun. Assuming the cork is released when the spring passes through its equilibrium position
10. ## chem

The activation energy of a certain reaction is 65.7 kJ/mol. How many times faster will the reaction occur at 51°C than at 8°C? State the assumptions you need to make in order to perform this calculation. (Select all that apply.) The collision model and
11. ## chemistry

Write an equilibrium constant expression for the chemical reaction of ammonia with water. (In this reaction assume that the concentration of water will remain constant)
12. ## Biology

Populations are frequently NOT in equilibrium due to selection or other evolutionary forces. Imagine a population of 100 individuals. Forty-nine of the individuals are homozygous dominant for beady-eye gene, 9 are heterozygous and 42 are homozygous
13. ## CHEMISTRY

find the concentrations of H+, HCO3-, CO3 2- in a 0.025M in H2CO3 solutions
14. ## chemistry

Calculate the pH of a solution that is made up to contain the following analytical concentrations : 0.05 M in H3PO4 and 0.02 M in NaH2PO4
15. ## Chemistry

Calculate the pH at 298K of solutions having the following ion concentrations? A. [H+]=1.0 x 10^-4M B. [H+]=5.8 X 10^-11M for A do you subtract 1.0 X 10^-14 from H+]=1.0 x 10^-4M
16. ## Chemistry

You mix 1.00 L of 2.00 M BaCl2 with 1.00 L of 2.00 M AgNO3. What compounds remain in solution, and what are their concentrations?
17. ## chem

H2+CO2<==>H2O+CO 1. what changes in concentrations of the products can be made to shift the equlilbrium to the right.?
18. ## Biology

If two samples of DNA are different concentrations and I was to add them, I do need to divide by the total volume, right?
19. ## Chemistry

Calculate the maximum concentrations of Pb+ that can exist in 3.0 x 10(-2)M Na2SO4 without forming a precipitate.
20. ## Chemistry

You mix 1.00 L of 2.00 M BaCl2 with 1.00 L of 2.00 M AgNO3. What compounds remain in solution, and what are their concentrations?
21. ## science

Which pairs of substances will form a buffer when mixed in equal concentrations?
22. ## Chemistry

Kc=1. The initial concentrations are A = 0M, B = 0M, C=10M. A+B --> C calculate the reaction quotient. (c)/(a)(b) = 10/0 .. is the answer zero?
23. ## biochem

ph is 4.6, pKa is 4.76 in a .15M buffer solution, what are the concentrations of acid and base?
24. ## chemistry

For each of the following explain how you would prepare 1.0 L of a solution that is 0.10 M in K+. Repeat for concentrations of 1.0 × 102 ppm K+ and 1.0% w/v K+.
25. ## chemistry

The concentrations of Ca and Na in a sample of river water are 13.4 mg/kg and 5.2 mg/kg. Express the concentration in molality
26. ## chemistry

Did the equation do not know the 2nd questions"s answers for the problems a) 2O3(g) = 3 O2(g) + heat (O3 IS UNDERLINED) [6.0x10-1] [0.21] b) 2 CO2 (g) + heat = 2 CO(g) +O2(g) (CO IS UNDERLINED) [0.103] [0.024] [1.18 x10-2] c) NO2(g) + O2(g) + heat =NO (g)
27. ## math

A spring is attached to the ceiling and pulled 6 cm down from equilibrium and released. After 4 seconds the amplitude has decreased to 3 cm. The spring oscillates 15 times each second. Assume that the amplitude is decreasing exponentially. Find an equation
28. ## physics

Which of the following statements is not true about a particle executing Simple Harmonic Motion? Choose one answer. a. Its velocity is maximum at the equilibrium position. b. Its acceleration depends only upon its displacement at that instant. c. Its
29. ## chemistry

At 23°C, Kp = 0.075 for the equilibrium: NH4HS (s) ↔ NH3 (g) + H2S (g) A sample of solid NH4HS is placed in a closed vessel and allowed to equilibrate. Calculate the equilibrium partial pressure (atm) of ammonia, assuming that some solid NH4HS
30. ## Spanish 2

Complete the sentences with the appropriate indirect object pronouns and present tense verb forms.? Modelo- (gustar) A mi ME GUSTAN las peliculas de accion. 1. (aburrir) A nosotros _____ los efectos especiales que no son muy realistas. 2. (encantar) A ti
31. ## English

Word bank: acute bluster bungle commentary duration eerie facet fidelity fray headstrong inhabitant numb pacify ravenous refute remorse setback smug synopsis tarry 11.I had a(n) _____ feeling that we were being followed and that something bad might happen
32. ## physics

Which of the following are in equilibrium? A disc that is speeding up and is spinning up. A baseball that is at rest and has a constant angular velocity. A turntable that is at rest and is spinning down. A tire that has a constant velocity and is spinning
33. ## physics

Which of the following are in equilibrium? A disc that is speeding up and is spinning up. A baseball that is at rest and has a constant angular velocity. A turntable that is at rest and is spinning down. A tire that has a constant velocity and is spinning
34. ## College Chemistry Really Need Help

THE EQUILIBRIUM CONSTANT FOR A REACTION IS 2.48 AT 25 DEGREES CELSIUS. WHAT IS THE VALUE OF ΔG°(KJ)AT THIS TEMPERATURE? (R=8.314 J/K mol)
35. ## COLLEGE CHEMISTRY

THE EQUILIBRIUM CONSTANT FOR A REACTION IS 2.48 AT 25 DEGREES CELSIUS. WHAT IS THE VALUE OF ΔG°(KJ)AT THIS TEMPERATURE? (R=8.314 J/K mol)
36. ## Chemistry

What is the equilibrium constant for a weak acid HA that dissociates 1% at an initial concentration of 0.05 M according to the following balanced chemical equation? HA <----> H+ + A-
37. ## Chemistry

Estimate the value of the equilibrium constant at 550 K for each of the following reactions. 1) 2CO(g) + O2(g) <==> 2CO2(g) 2) 2H2S(g) <==> 2H2(g) + S2(g) Thanks in advance!
38. ## chemistry

for a reversible reaction if the concentration of reactant are doubled aad a definate tempreture then equilibrium constant will
39. ## chemistry

4NH3(g)+5O2(g) yield 4NO(g)+6H2O(g) Deduce the equilibrium constant expression for the reaction.
40. ## chemistry

Calculate the equilibrium constant for 2CH3OH(l)+3O2(g)->2CO2(g)+4H2O(l) by using standard reduction potentials?
41. ## chemistry

4HCl(g)+O2(g)-><-2Cl2(g)+2H2O(g) with Hcl=0.80M, Cl2=3.0M, O2=0.20M H2O=3.0M what is the equilibrium constant

Predict the proper equilibrium constant expression for the following reaction... Fe(OH)3(s) ----> Fe3+(aq) + 3 OH-(aq) Explain the reasoning behind your answer.
43. ## College Chemistry

2.50 mL of ethyl acetate and 2.50 mL of distilled water are added to the 5.00 mL of 3 Molar HCl and the mixture is allowed to sit for a week. At the end of this time, 28.30 mL of 1.000 Molar NaOH was needed to titrate the solution. (The HCl was the same as
44. ## Micreoeconomics

1. Assume a perfectly competitive constant cost industry, currently in long-run equilibrium. Market demand in the industry is given by Q = 1500 - 25P. The short-run market supply curve is given by: Q = 15P - 100 for P B 10 = 0 for P < 10 There are 25
45. ## chemistry

Please help!!! Desperate for answer!!!? Did the equation do not know the 2nd questions"s answers for the problems a) 2O3(g) = 3 O2(g) + heat (O3 IS UNDERLINED) [6.0x10-1] [0.21] b) 2 CO2 (g) + heat = 2 CO(g) +O2(g) (CO IS UNDERLINED) [0.103] [0.024] [1.18
46. ## Physics

What is an equilibrant? (Points : 1) an object that has zero net force acting on it two chemical reactions proceeding at the same rate in opposite directions a force that makes the net force on an object zero a force in the same direction as the net force
47. ## AP PHYSICS

A .35 kg ladle sliding on a horizontal frictionless surface is attached to one end of a horizontal spring (with the spring constant (k) =455 N/m) whose other end is fixed. The mass has a kinetic energy of 10 J as it passes through its equilibrium position
48. ## HELP!!!!!!!!!

Introduced into a 1.50L container is 0.100mol PCl5(g). The flask is held at 227degreesC until equilibrium is established. What are the partial pressures and the total pressures of the gases in the flask at the equilibrium. PCl5(g)<-->PCl3(g)+Cl2(g)
49. ## Chemistry

The reaction O2 ⇄ 2 O has a K=1.2x10-10. If a 1.7 L container holds 3.8 moles of O atoms (and nothing else), what will the concentration of O be when equilibrium is reached? So far, I have 1.2x10^-10 = 2.2^2 / 0 but I don't know how to do the rest.
50. ## math

The weekly demand and supply functions for Sportsman 5 X 7 tents are given by the following respective functions where p is measured in dollars and x is measured in units of a hundred. Find the equilibrium quantity. Find the equilibrium price.
51. ## Chemistry

The reaction O2 ⇄ 2 O has a K=1.2x10-10. If a 1.7 L container holds 3.8 moles of O atoms (and nothing else), what will the concentration of O be when equilibrium is reached? So far, I have 1.2x10^-10 = 2.2^2 / 0 but I don't know how to do the rest.
52. ## Chemistry

A sample of ammonia gas was allowed to come to equilibrium at 400 K. 2NH3(g) --> N2(g) + 3H2(g) At equilibrium, it was found that the concentration of H2 was 0.0584 M, the concentration of N2 was 0.0195 M, and the concentration of NH3 was 0.430 M. What
53. ## physics

A hockey puck slides across the ice at a con- stant speed. Which of the following is true? 1. The puck is moving and thus not in equi- librium. 2. The puck can be considered neither at rest nor in equilibrium. 3. It is in equilibrium. 4. None of these 5.
54. ## physics

a horizontal spring is stretched from its equilibrium position when a force of 0.75kg acts on it. then a force of 1.5 kg is attached to the end of the end of the spring and pulled 4.5 cm along a frictionless table from the equilibrium position. the body is
55. ## physics

Question 4 A 0.9 kg block attached to a spring of force constant 2.1 N/m oscillates with an amplitude of 9 cm. A)Find the maximum speed of the block. Answer in units of m/s B)Find the speed of the block when it is 4.5 cm from the equilibrium position.
56. ## Chemistry

For the system, H2(g)+X2(g) <-> 2HX(g) Kc=24.4 at 300K. A system was charged with 1 mole of H2 and 1 mole of I2 in a 3 liter container. The catalyst was introduced using a remote unit, and the system was allowed to come to equilibrium. How many moles
57. ## chemistry

Introduced into a 1.50L container is 0.100mol PCl5(g). The flask is held at 227degreesC until equilibrium is established. What are the partial pressures and the total pressures of the gases in the flask at the equilibrium. PCl5(g)<-->PCl3(g)+Cl2(g)
58. ## Chemistry

1. Molarity is to moles of solute over liters of solution as molality is to A. molar concentration over molal concentration. B. moles of solute over kilograms of solvent. C. molal concentration over molar concentration. D. moles of solute over moles of
59. ## math

given the demand equation 8x + p - 46 = 0 and the supply equation 7x - p + 18 = 0, where p is the unit price in dollars and x represents the quantity demanded in units of a thousand, determine the equilibrium quantity and equilibrium price.
60. ## Ap chemistry

Suppose NaOH is added to the following system when it is at equilibrium. NH3 (aq) + H2O (l) = NH4 (aq) + OH (aq) a) in which direction will the reaction shift after the NaOH is added? b) will this stress increase or decrease the value of the reaction
61. ## English grammar

1) Observe the relation and fill in the blanks. food:crude:: should: ____ (I think the answer could be prude but it could also be would, could etc. I considered these answers because all of them rhyme with should just like crude rhymes with food. But there
62. ## Science -Physics

The shaker cart,shown in the figure,is the latest extreme sport craze.You stand inside of a small cart attached to a heavy-duty spring,the spring is compressed and released,and you shake back and forth,attempting to maintain your balance. Note that there
63. ## Chemistry

How many of the following changes would alter the numerical value of the equilibrium constant Kp for the reaction 2OF2(g) ⇀ ↽ O2(g) + 2F2(g)? I) an increase in temperature II) a decrease of the container volume III) adding more O2 at constant
64. ## Physical Science

Hello! Thanks for checking my question out! ____ Fill in the Blank 10. The _______________ theory of matter states that all particles of matter are in constant motion. (1 point) My Answer: kinetic Could someone please check my answer? Thanks! - Da Fash
65. ## Chemistry

Two flasks containing the same inert gas are at the same temperature and pressure of 800. mm Hg. One flask is injected into each of the flasks to allow phase equilibrium to be established. No leakage occurs. If the pressure in the 1.0 L flask is 900 mm Hg,
66. ## bioelectricity

Assume that frog muscle cell membrane is permeable to Na and K only. The membrane permeabilities for Na and K are Pna and Pk respectively. At 16∘C, the resting membrane is -91 mV. What is the ratio of permeabilities Pna/Pk? For frog muscle,
67. ## Chemistry

10g of NOBr were added to a 5L flask and the temperature was fixed to 350K. The following equilibrium is reached : NOBr(g)=NO(g)+1/2Br2(g);The pressure measured at the equilibrium was 0.63 atm.Determine Kp and Kc. I need help to solve this problem.I
68. ## chemistry

I, IV and V only 005 10.0 points When a chemical reaction comes to equilibrium, both the forward and the reverse reactions continue, but their rates are equal. For such a system at equilibrium at 300 K and 1.00 atm pressure, the change in Gibbs free energy
69. ## Chem II - Equilibrium

For the reaction at 430 degree C, H2 + I2 <=> 2HI Kc = 54.3. Initially 0.714 moles of H2 and 0.984 miles of I2 and 0.886 moles of HI are placed in a 2.40 L vessel. The equilibrium concentration of H2 and I2 are _____. Ok, I tried this by changing the
70. ## Chemistry Equilibrium

At 200 °C, Kc = 1.4 x 10-10 for the reaction N2O(g) + NO2(g) 3NO(g) If 0.174 mol of N2O and 0.337 mol NO2 are placed in a 4.00 L container, what would the NO concentration be if this equilibrium were established?
71. ## Chemistry!! Help

Consider the following equilibrium: N2O4 <=> 2NO2 You may assume that delta H and delta S do not vary with temperature. At what temperature will an equilibrium mixture of 1 atm total pressure contain twice as much NO2 as N2O4?
72. ## Chemistry(check my work)?

An equilibrium mixture of the following reaction was found to have [COF2] = 0.255 M and [CF4] = 0.118 M at 1000°C. What is the concentration of CO2? 2 COF2(g) ---> CO2(g) + CF4(g) Keq = 2.00 at 1000°C I know I need to put the numbers in the equation
73. ## College physics

A 0.45 mass is attached to a spring with a force constant of 26 and released from rest a distance of 3.2 from the equilibrium position of the spring. a.What is the maximum speed of the mass? (m/s) b.How far is the mass from the equilibrium position when
74. ## physics

A particle moving in simple harmonic motion passes through the equilibrium point x=0, 3 times per second. At t=0 its velocity at x=−0.0325m is negative. It travels 0.5m in a complete cycle. a) what is the phase constant in cm. i found the equation:
75. ## chemistry

A reaction with an equilibrium constant Kc = 1.5 x 10-25 would consist of which of the following at equilibrium: A. some reactants and products with products slightly favored B. essentially all products C. some reactants and products with reactants
76. ## Chemistry

Calculate the percent ionization of benzoic acid at the following concentrations: 0.00014 M i got 68% but it says its wrong
77. ## High School Chemistry

Determine the pH of solutions with the following ion concentrations: 1) {H+} = 1.0x10 to the negative 3 M
78. ## chemistry

Calculate the concentrations of all species present in a 0.32 M solution of ethylammonium chloride (C2H5NH3Cl).
79. ## Science

Do you know at what level PCE concentrations are of concern? Is 8,300 PPB a major problem?
80. ## Chemistry

If the initial concentration of is 0.250 , and the reaction mixture initially contains no products, what are the concentrations of and after 80 ?
81. ## CHEMISTRY

Assuming equal concentrations , rank these solutions by pH. RbOH(aq), NH3(aq), HF(aq) HBr(aq), Ca(OH)2(aq).
82. ## Chemistry

The solubility products of Fe(OH)2 and Fe(OH)3 are 10^-17 and 10-38 respectively. If the concentrations of Fe2+ and Fe3+ are each 10^-5, at what pH will each hydroxide just begin to precipitate?
83. ## chemistry

At 90C the following equilibrium is established H2(g) + S(s) = H2S(g) Kc= 6.8x10^-2 If 0.17 moles of H2 and 0.4 mole of Sulfur are heated in a 1L vessel up to 90C, what will be the partial pressure of H2S at equilibrium? Dr. Bob, first is 0.32 atm correct?
84. ## chem

Introduced into a 1.50L container is 0.100mol PCl5(g). The flask is held at 227degreesC until equilibrium is established. What are the partial pressures and the total pressures of the gases in the flask at the equilibrium. PCl5(g)<-->PCl3(g)+Cl2(g)
85. ## Chemistry

Hi! I need help with the step by step procedure for chemical equilibrium problems. Here is an example: Given two reactions: a. PbCl2 <---> Pb^(2+) + 2Cl^(-) K = 1.76*10^(-10) b. AgCl <---> Ag^(+) + Cl^(-) K = 1.11*10^(-4) What is the
86. ## CHEMISTRY

The initial concentration of PCl5 was 0.1983 M. It was allowed to decompose at some temperature until equilibrium had been attained (see reaction below). What must be the equilibrium concentration of PCl3? PCl5(g) ↔ PCl3(g) + Cl2(g) Kc = 0.0580 a.
87. ## statistics

20. Supply and Demand Let the supply and demand functions for butter pecan ice cream be given by p=s (q) = 2/5q and p= d (q) = 100 – 2/5 q where p is the price in dollars and q is the number of 10- gallon tubs. a. Graph these on the same axes. b. Find
88. ## Chemistry

What does it mean to say that a solution is saturated with a solute? (Select all that apply.) a) A solute that is at equilibrium with undissolved solvent. b) A solvent that is at equilibrium with solute. c) A solution contains the maximum amount of solvent
89. ## micoeconomics

in regards to equilibrium in exchange and production. An exchange economy is characterised by the number of agents in it, the preferences or utility functions of the agents, the number of goods and the endowments of the agents. by looking at my notes i
90. ## physics

a 2.00 kg block is attached to a spring of force constant 500 N/m. The block is pulled 5.00 cm to the right of equilibrium and released from rest. Find the speed of the block as it passes through equilibrium if a) the horizontal surface is frictionless and
91. ## Physics

Three liters of nitrogen combine with 9 L of hydrogen to form 6 L of ammonia. If the molecules of nitrogen and hydrogen have two atoms each, how many atoms of hydrogen and nitrogen are there in one molecule of ammonia? ____ atoms of hydrogen ____ atoms of
92. ## physics

Three liters of nitrogen combine with 9 L of hydrogen to form 6 L of ammonia. If the molecules of nitrogen and hydrogen have two atoms each, how many atoms of hydrogen and nitrogen are there in one molecule of ammonia? ____ atoms of hydrogen ____ atoms of
93. ## chemistry

For 2SO2(g)+O2(g)⇌2SO3(g), Kp=3.0×104 at 700 K. In a 2.00-L vessel the equilibrium mixture contains 1.15 g of SO3 and 0.107 g of O2. 1) How many grams of SO2 are in the vessel? ---------------------------- A flask is charged with 1.500 atm of N2O4(g)
94. ## accounting

These questions are so confusing. So I was wondering what are each of the formulas to solve each question or what steps I need to take to complete them? I've been trying and I can't find the correct answer. ____ 11. The Dayton Corporation began the current
95. ## Chemistry

2 H2S (g) + SO2 (g) <===> ƒnƒn3 S (s) + 2 H2O (g) 1) At 298 K, the standard enthalpy change, H¢X, for the reaction represented below is -145 kilojoules. (a) Predict the sign of the standard entropy change, S¢X, for the reaction. Explain the basis
96. ## physics (Newton's Laws)

Please help, A cat is stuck in a tree. You are designated with the job to get it out, yet you do not want to climb the tree, because you may get stuck as well. Instead you set up a pulley system. A rope (consider it massless) runs from the seat you sit on
97. ## chemistry

An unknown weak monprotic acid with the general formula HA has a Ka=5.5 x 10^-7. what is the value of the equilibrium constant that describes the following reaction? A- +H2O = HA +OH-
98. ## Chemistry- DrBob222

What is the equilibrium constant for a weak acid HA that dissociates 1% at an initial concentration of 0.05 M according to the following balanced chemical equation? HA <----> H+ + A-
99. ## chemistry

2 NO(g) + 1 O2(g) <==> 2 NO2(g) Calculate K, the equilibrium constant, from thermodynamic data at 289 K. (Hint #1: Assume that S and H do not change with temperature.)
100. ## College Chemistry..Urgent!

THE EQUILIBRIUM CONSTANT FOR A REACTION IS 2.48 AT 25 DEGREES CELSIUS. WHAT IS THE VALUE OF ΔG°(KJ)AT THIS TEMPERATURE? (R=8.314 J/K mol)