# 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.

113,934 results, page 80
1. ## Economics

b) If you were the head of the Japanese Central Bank, how would you respond if your goal was to keep the interest rates at the original equilibrium level (before the increase in the taxes) in the money market?
2. ## calculus

a 100 pound collar slides on a frictionless vertical rod. find the distance y for which the system is in equilibrium if the counterweight weights 120 pounds.
3. ## Economics

b) If you were the head of the Japanese Central Bank, how would you respond if your goal was to keep the interest rates at the original equilibrium level (before the increase in the taxes) in the money market?
4. ## Economics

b) If you were the head of the Japanese Central Bank, how would you respond if your goal was to keep the interest rates at the original equilibrium level (before the increase in the taxes) in the money market?
5. ## Economics

b) If you were the head of the Japanese Central Bank, how would you respond if your goal was to keep the interest rates at the original equilibrium level (before the increase in the taxes) in the money market?
6. ## PHYSICS!

0.115 kg of water at 81.0o C is poured into an insulated cup containing 0.220 kg of ice initally at 0o. Calculate the mass of liquid when the system reaches thermal equilibrium.
7. ## Chemistry

A 32.3 g iron rod, initially at 22.4 ∘C, is submerged into an unknown mass of water at 62.9 ∘C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 59.4 ∘C.
8. ## Chemistry

A solution is prepared by mixing 45.00 mL of 0.022 M AgNO3 with 13.00 mL of 0.0014 M Na2CO3. Assume volumes are additive. Calculate [Ag+], [CO32-], [Na+] and [NO3-] after equilibrium is established.
9. ## electronics

Two identical small charged spheres, each having a mass of 3.00*10^-2 kg hang in equilibrium . The length L of each string is 0.150m, and the angle between them is 5. Find the magnitude of the charge on each sphere
10. ## physics

If the specific heat of water = 4190 J/kg /°C and a total of 120g of hot water at 95°C is poured into the calorimeter, resulting in a final equilibrium temperature of 73°C, how many joules of heat are lost by the water? 11061.6 If the specific heat of
11. ## AP chemistry

what is the balanced equation of H + [Al(OH)4]
12. ## Science

H2) -----> H^+ + OH^- Is this equation balanced
13. ## Chem

Substance X raises the boiling point of 150g of water to 101.3 C. What is the molecular mass of substance X? (assume x does not ionize/ is not volatile)
14. ## chemistry

what would be a diagram that we can use to idenitify an unknown substance using electrochemical data. we have a reduction table and ksp values and we also that the substance is either bromine or iodine
15. ## Chemistry

Find the molar enthalpy of vaporization for a substance, given that 3.21 mol of the subtance absorbs 28.4 kJ of energy as heat when the substance changes from a liquid to a gas.
16. ## Science

What is the specific heat of an unknown substance if 2000 J of energy are required to raise the temperature of 4 grams of the substance 5 degrees Celsius?
17. ## chemistry

What is the specific heat of an unknown substance if 2000 J of energy are required to raise the temperature of 4 grams of the substance 5 degrees Celsius?
18. ## chemistry

um, i was wondering what the word is for a substance composed of two or more elements that are chemically combined to form a new substance with different properties. um, i kinda need the answer soon. thanx. :) Kenzie
19. ## chemistry

You vaporize a liquid substance at 90.0 °C and 795.0 mmHg. The volume of 0.548 g of vapor is 237 mL. What is the molecular weight (in amu) of the substance?
20. ## chemistry

Some of the substance commonly used in stomach antiacid are MGO,MG(OH)2,AL(OH)3. Which of these substance will neutralize thr greatest amount of 0.10M HCl per gram?
21. ## Math

Suppose that the half-life of a substance is 250 yrs. .If there were initially 100 g of substance .How much will remain after 500 years??with solution please
22. ## math

the local lions club sold raffle tickets for a new golf caqrt. the sales for each week are given below. if more tha 250 tickets are sold, then the lions club raised enough for the golf cart. use the inequality t>250, where t representrs the number of
23. ## Equal riddle

I am between 20 to 30.when u put me into 5 equal group, there is an odd number in each group and one is left over.what number am i
24. ## Chemistry

Did I do these right? Can someone let me know if I did them correctly? I had someone help me with the problems but know I want to make sure their the right answers? 1. Methane burns in oxygen according to the following equation: CH4 + 2O2 ----> CO2 +
25. ## Chemistry

Would a substance that does not form hydrogen bonds have a high or low surface tension? What about vapor pressure, specific heat,heat of vaporization or boiling point? It requires extra energy to break hydrogen bonds so a substance that does not form H
26. ## Chemistry

The pH of a buffer can be predicted using the Hendersen-Hasselbach equation: pH=pKa+ log([conjugate base][conjugate acid]) The choice of the conjugate acid-base pair (as you did in the previous questions) determines the pKa value to be used in the H-H
27. ## chemistry

Write a balanced equation for the following reaction. Use whole number coefficients and subscripts appropriately. When hydrochloric acid is mixed with sodium hydrogen carbonate, the mixture fizzes. The fizzing occurs because the reaction produces a gas,
28. ## Algebra

A student earns \$0.65 for each mistake she finds in a text. Sketch the equation of direct variation. An equation of direct variation is of the form M = k X where k us a constant. In your case M might be total money earned and X is the number of students.
29. ## Science

A 1750 kg van is travelling down a 10 degrees inclined road at a speed of 6 m/s. If the driver brakes suddenly causing the wheels to lock, determine the distance L his tyres will skid on the road. The coefficient of kinetic friction between the wheels and
30. ## Physics

A 1750 kg van is travelling down a 10 degrees inclined road at a speed of 6 m/s. If the driver brakes suddenly causing the wheels to lock, determine the distance L his tyres will skid on the road. The coefficient of kinetic friction between the wheels and
31. ## Spanish

49. Mi madre hace ____ con tortillas, carne de res, queso y tomates. a. el guacamole b. las quesadillas c. los tacos d. el flan sabroso C? 51. No tengo tiempo para arreglar mi cuarto. Voy a poner la ropa ________ de la cama. Nadie puede verla. a. encima b.
32. ## French - Help :(

Hi all. I'm trying to write a paragraph in french. These are my instructions: Décrivez vos activités habituelles pendant les vacances dernières en utilisant au moins sex verbes réfléchis à l'imparfait. This is what I want to say: Last winter, I did
33. ## physics

Often in physics we won't be able to predict motion of a bunch of objects exactly and so we resort to statistical methods. An example of a statistical approach is the resulting profile of a bunch of disks dropped through a series of pegs. As each disk
34. ## chemistry

1) Copy and complete: Two particles can react together only if they …… and the …… has enough …… to be ……. 2) What is meant by: a a successful collision? b an unsuccessful collision? 3) Reaction between magnesium and acid speeds up when:
35. ## Chemistry

A Cu/Cu^2+concentration cell has a voltage of 0.22v at 25 C. The concentration of Cu^2+ in one of the half cells is 1.5x10^-3 M. What is the concentrate of Cu^2+ in the other half cell? I think I will have to use Nernst equation, but I am so stuck! please
36. ## physics (force table)

In a four force case, could the ring ever be in equilibrium if all four pulleys were placed in quadrant one?
37. ## chemistry

calculate Ke for the following(equilibrium concertations given below substances H2(g) + Br(g)=2 Br+heat, N2O4(g) + heat= NO2(G)
38. ## economic

A price set above equilibrium price creates a shortage. True or False
39. ## Science

Artificial Selection leads to loss of Genetic Variation? or Genetic Equilibrium?
40. ## Economics

How do you find planned investment from the GDP, and determining the equilibrium GDP of an economy?
41. ## Chestry

If there are 8.8 moles of h2 and co2 in a 500 ml container at equilibrium how many moles of co and h2o would be present?
42. ## Physics

what can be the source of error in lab of forces equilibrium,force board lab?
43. ## Chemistry

C (s) + S2 (g) = CS2 (g) . Kp=5.6 At equilibrium, P cs2 = 0.152 atm. Find P s2 How would I start this problem?
44. ## Physics

When will an object be in equilirium if different forces are acting on the object from the different systems? Would it be appropriate to use F=ma to find the equilibrium?
45. ## Physics

what can be the source of error in lab of forces equilibrium,force board lab?
46. ## chemistry

How will the removal of some HOCl(g) from the following system affect the equilibrium? H2O(g) + Cl2O(g) -----> HOCl(g)
47. ## math

Class A has the same number of students as Class B. The ratio of the number of girls in Class A to the number of girls in Class B is 3 : 2. The ratio of the number of boys in Class A to the number of boys in Class B is 3 : 5. What is the ratio of the
48. ## chemistry

Write the balanced net ionic equation for each of the following: 1) The reaction of dilute nitric acid with solid aluminum oxide. 2) The reaction of nitrous acid (HNO2) with potassium permanganate to produce nitrate and Mn(II) ions. Thanks for any help.
49. ## physics

!.How does work affect power with time constant? 2.how does the weight of the stair-climber affect work and power?
50. ## Maths

If k>0 and the product of the roots of equation x to power 2-3kx+2e power 2logk-1=0 is 7 then sum of roots is?
51. ## math

how do I figure ou this answer? Jess say's the square of the sum of 17 plus some number will equal his mother's age squared. If jess' mother's age squared is 2209, what number must be used to make the equation true?
52. ## Chemistry.

Ca(HCO3)2(s) decomposes at elevated temperatures according to the stoichiometric equation Ca(HCO3)2(s)-> CaCO3(s) + H2O(g) + CO2(g) a.) If pure Ca(HCO3)2(s) is put into a sealed vessel, the air is pumped out, and the vessel and its contents are heated,
53. ## P-Chem

The equilibrium constant K for the hydrolysis of adenosine triphosphate (ATP) to adenosine diphosphate (ADP) and phosphate is 1.66X10^5 at 37 degrees celcius, and Standard Delta H is -20.1 kJ/mol. Calculate Standard Delta S for the hydrolysis at 37 degrees
54. ## chemistry

What is DG° at 298 K for the following equilibrium? Ag+(aq) + 2NH3(aq) ￼ Ag(NH3)2+(aq); Kf = 1.7 × 107 at 298 K
55. ## science-anatomy

How is static equilibrium accomplished? How is dynamic equilibium accomplished?
56. ## Chem

Why do the rate of reaction for a reversible reaction slows down at equilibrium stage.
57. ## chemistry

Could someone please tell me if I did this question correctly? An incomplete combustion reaction of 12.125 grams of propane proceeds as follows: 2C3H8 + 11O2 = 3CO2 + 4H2O + 2CO + C(s).How many grams of solid carbon residue are produced as a product? my
58. ## Chemistry

A metallurgist decomposes an unknown ore to the following metals. What is the chemical formula of the ore? (Show all the chemical equation and solution steps) ore = x metal products from ore decomposition: Al: 162.0 grams Sb: 730.8 grams Ag: 1,294 grams
59. ## science

below are about 21 questions from my final study guide. I was given a 563 question study guide for my final and obviously I did not understand every question. So basically I did not understand 4% of the questions which is pretty good. Just any help with
60. ## MATH AGAAAAIN

There are 75% fewer boys than girls in Club A. The ratio of the number of boys to the number of girls in Club B is 3 : 8. There is an equal number of boys in Club A and Club B. If Club A has 36 more girls than Club B, how many boys are there in Club A?
61. ## Chemistry

NaOH + HS0-+ Hp + NaS0 24 24 Which of the following is the number of moles of NaOH required to neutralize 1 mole of H2S04 in the equation above? (Note: The reaction is not balanced.) A. 0.5 moles B. 1 mole C. 1.5 moles D. 2 moles 1
62. ## Math grade 6, ratio

Mr. Lynch bought some oranges and pears.after giving away 10 oranges, he had twice as many pears as oranges left.if he had 24 pears in the end,what was the ratio of the number of oranges to the number of pears he had at first?
63. ## Calculus

24. A pharmaceutical company has determined that a realistic model for the relationship between blood pressure (systolic) and the amount of a nerve drug designed to reduce the systolic pressure is given by the equation P=Pi + 2x - x^2. P is measured in
64. ## physics

A 710 gram block is released from a height h above an ideal spring of spring constant 400 N/m. The block sticks to the spring, and comes momentarily to rest after compressing the spring by an amount of 18.7 cm. DropOnSpring (a) What is the value of the
65. ## physics

A figure shows two forces acting on an object. They have magnitudes F1 = 6.3 N and F2 = 2.1 N. What third force will cause the object to be in equilibrium?
66. ## Chem II

For the reaction H2+I2, Kc=55.3 at 700K. In a 2. L flask containing an equilibrium mixture of three gases, there are .056g H2 and 4.36 g I2. What is the mass of the I2 in the flask?
67. ## science physics

a force acted upon a body by 3 given force is under equilibrium if f1 =10n and f2 =6n find f3 and angle

What is the Kc for the following equilibrium at 500∘C, N2(g)+3H2(g)⇌2NH3(g) [H2] = 0.50M , [N2] = 0.50M , [NH3] = 2.0M ?
69. ## physics

if i am pulling a wagon full of puppies that are in dynamic equilibrium must be the net force on the puppies
70. ## chemistry

MX2(s)<--> M2+(aq)+ 2X-(aq) ksp=[M2+][X-]2 the question asks.. why is [MX2] not used in the expression for the equilibrium? is it because they aren't used in the expressions?
71. ## Physics

A piece of copper at 280 C is dropped into 1.1 kg of water at 25 C. If the equilibrium temperature is 30 C, what is the mass of the copper?
72. ## chemistry

2 NH3 (g) ----> N2 9g) + 3 H2 (g) at equilibrium, [NH3] = 0.0227 M, [N2] = 0.119 M, and [H2] = 0.346 M. Calculate Kc for the reaaction at this temperature
73. ## Chemistry

How has the equilibrium been modified in Haber Process? what is the heat value for the following exothermic reaction : Hb(aq) + O2(aq) = HbO2(aq) + (Heat ?)
74. ## Applied Physics

A car is traveling at 20 meters per second. The driver steps on the brake. The car is in equilibrium
75. ## Chemistry (Check)

Thanks but can you check another one for me The Valence electrons largely determine the blank of an element and are usually the only electrons used in blank. T have the first one as chemical properties, whats the second blank chemical properties would work
76. ## History- Confucius

Question 1 The title Analects best translates as “____.” poems dialogues sayings fables Question 2 Which of the following does not reflect Confucian values: Replacing old traditions with modern values Exploring wisdom within yourself rather than
77. ## math/algerbra

What is the equation for finding the midpoint? The midpoint of a line whose end points are (x1, y1) and (x2, y2) is ( (x1 + x2)/2, (y1 + y2)/2 ) hOw dO yOu find the x and y intercept if the equation is nOt in slOpe intercept fOrm? 4+-5=7+8=2 When I doing
78. ## ALGEBRA WORD PROBLEM! HELP!

And if a length of a rectangle is 3 more than twice the width and the are is 90 cm squared than what are the dimensions of the rectangle? The width of the rectangle is 43.5 and the length of the rectangle is 87. All together when you add it up it will make
79. ## algebra

1. a number increased by 21 is 28. find the number 2. a number decreased by 12 is equal to 30. find the number. 3. 8 less than a number is 15. fid the number
80. ## math help

1. a number increased by 21 is 28. find the number 2. a number decreased by 12 is equal to 30. find the number. 3. 8 less than a number is 15. fid the number
81. ## chemistry

Why is gas a chemical reaction not detectable by sight? Explain? my answer is because the atoms or molecules of matter in the gaseous state move freely among each other, and are, in most instances, packed more loosely than the molecules of the same
82. ## Chem

Calculate the reaction quotient Q,for the cell reaction.The measured cell voltage is given.balane the chemical equation by using the smallest whole number coefficients. (a) Pt(s)Sn4+(aq),Sn2+(aq)||pb2+(aq),pb2+|C(graphite)(s) -E=+1.33V
83. ## Economics

a firm in a purely competitive industry is currently producing a 1000 unir per day at a total cost of \$450. if the firm produced 800 units per day, it total cost will be \$300, and it it produced 500 units per day, it total cost will be \$275. Requirements:
84. ## Chemistry III

Assume you dissolve 0.240 g of the weak acid benzoic acid, C6H5CO2H, in enough water to make 1.16 102 mL of solution and then titrate the solution with 0.153 M NaOH. C6H5CO2H(aq) + OH -(aq) C6H5CO2-(aq) + H2O(l) (a) What was the pH of the original benzoic
85. ## Chemistry

The gas phase decomposition of dinitrogen pentoxide at 335 K N2O5(g) 2 NO2(g) + ½ O2(g) is first order in N2O5. During one experiment it was found that when the initial concentration of N2O5 was 0.218 M, the concentration of N2O5 dropped to 2.96E-2 M
86. ## math

please check my work. 1. The number of words (x) Tina can type per minute is at Least 50. write and graph and inequality. (I broke it down to these 2 choices because the A & D was incorrect) B. x is less than or equal to 50 C. x is greater than or equal to
87. ## math

The question that have is to simplify and write the answer in exponential notation using positive exponents 2 to 4th power x 2 -2 These are my choices a 4 to the 8th power b 2 to the 8th power c 4 to the 2nd power d 2 to the 2nd power
88. ## Chemistry

Can someone check my answers for me thank you. I have the equation balanced below. 2H2O + K2SO4 --> H2SO4 + 2KOH Ionic equation for the reaction between sulfuric acid and potassium hydroxide. 2H+ + SO4^2- + 2K+ + 2OH- --> 2K+ + SO4^2- + 2H2O Net
89. ## Chemistry Lab

We did a lab where we reacted antacid with HCL and measured the pressure increase after the reaction. Then we found the percent concentrations of calcium carbonate of the antacid tablet. The question is: say the percent of calcium carbonate from trials 1 &
90. ## Science

What did Antoine Lavoisier’s experiments demonstrate? a- Atoms always split into pairs during a chemical change. b- Mass is neither lost nor gained during a chemical change. c- Matter can be created during a chemical change. d- Energy is neither lost nor
91. ## Chemistry: Buffer Intensity problem

You wish to prepare a pH 4.76 acetic acid sodium acetate buffer with a buffer intensity of 1 M per pH. What concentrations of acetic acid and sodium acetate are needed?
92. ## Chemistry :/

Experiment 1 results: mass of crucible 88g mass of hydrate 93g mass of salt 91.196g 1. Calculate the following: a:mass of water in the hydrate sample (g) b:number of moles of water in the sample c:mass of pure salt in the sample (g) d:number of moles of
93. ## Chemistry

If two titrations were completed were completed: 1) the titration of HCl with Na(OH) 2)the titration of HCl with Ba(OH)2 (the concentrations of acid and base for both titrations are the same) How would the titration curves of each solution be different? I
94. ## Chemistry

Calculate the ratio of the concentration of CO3-2 & HCO3- ions needed to achieve buffering at pH= 9.50. The PkA2 of H2CO3 is 10.25.
95. ## Physics check

1)What can you say about the motion of a body if: a. its displacement-time graph is a straight line inclined with the time axis b. its velocity-time graph is a straight line inclined with the same axis. c. its velocity- time graph is a parabola A)The
96. ## Math grade 5, two-part problem

The ratio of the number of lisa's pens to the number of adeline's pens was 2:3 at first.after father gave lisa another 16 pens,the ratio became 2:1 A.how many pens did adeline have? B.if adeline gave away 6 pens,what would be the new ratio of the number of
97. ## math analysis/ precalc

Assume the annual number of skin cancer deaths increases geometrically, instead of arithmetically. Use the same starting number of 9,300 in 2000 and 200,000 in 2050. Select the number closest to the ratio of number of deaths from year to year.