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.
86,287 results, page 91

Math
Dori claims that 3.52 is not a rational number because it is not written as a ratio of integers. Is she correct? Explain why or why not. 
math
four positive number are in a.p. If 5,6,9 and 15 are added respectively to these no.,we get a g.p. ,then common ratio of g.p. And commo difference of a.p. Is 
Mechanics & hydromechanics
Three forces pulling on a body are in equilibrium. The direction of one is due south, the direction of another is 80 degrees east of north, and the third force acts in the direction of 35 degrees west of north. If the magnitude of southerly force is 38 N, find the magnitudes ... 
science
A 4.50 g mass resting on a horizontal, frictionless surface is attached to one end of a spring; the other end of the spring is fixed to a wall. It takes 3.6J of work to compress the spring by 13.0 cm. If the spring is compressed, and the mass is released from rest. find a) the... 
Physics
2 moles of ideal gas are in a cylinder container with crosssectional area 1*10^2 m^3. Cylinder is fitted with a light, movable piston that is open to atmosphere, where pressure is 10^5 PA.A 50KG MASS PLACED ON PISTON KEEPS IT IN mechanical equilibrium when temperature is ... 
Math Business Calc.
Find the consumer surplus at the equilibrium point.(I keep using the formula listed below but get a completely different answer from what the book says. I am a visual person so please show me step by step so I can see where I went wrong. D(x)=(x6)^2 ; x=3 Formula: D(x)QP The... 
Math Ratio Question Need A Quick Reply
In 1997, there were 3043 county governments in the U.S. Of these, 3 were in Deleware. What was the ratio of county governments in Deleware to total county governments? Do I write this: 3043/3 or 3/ 3043 3/3043 just in case you still need this, its: 3/3043 think of the words. ... 
Physics ( using earth to find pressure of planet y
3. A model of Earth’s interior: Look up the radius and mass of the Earth. Radius is 6,371 km Mass is 5.974 x 10^24 kg Calculate its average density. p_e = (5.974 x 10^24 kg)/ (4/3)pi r^3 = (5.974 x 10^24 kg)/ (4/3)pi (6371)^3 = 5.54 g/cm^3 Imagine a planet of the same radius... 
physics
Find the ratio of the electrostatic to gravitational force between two electrons. 4.16×1042 What is this ratio for two protons? (Why is the ratio different for electrons and protons?) 
Math
Suppose you find the ratio of the lengths of adjacent sides in a parallelogram. This ratio is equivalent to the ratio of the adjacent sides in another parallelogram. Are the figures similar? Explain. 
chemistry
Which answer choice correctly describes why larger atoms tend to break apart? The number of neutrons in the nuclei of larger atoms is equal to the number of protons, which makes these atoms less stable. The proportion of protons and neutrons in the nuclei of larger atoms is ... 
math
A company borrowed $1500. It must make monthly payments of $40.50 for 42 months to pay off the loan. Use the constant ratio formula to find the annual percentage rate. 
math Help ASAP
write and solve inequality 17. the speed limit of a highway is 55 miles per hour. a car is traveling at least 65 miles per hour. how many miles per hour m over the speed limit is the car traveling? A 55m>equal to 65;m. eqaul to 10 B m+65< equal to 55; m < equal to ... 
Chemistry
carbon disulfide is prepared by heating sulfur and charcoal. the chemical equation is S2(g)+C(S)=CS2(g) and Kc = 9.4 at 900K. How many grams of CS2(g) can be prepared by heating 8.9moles of S2(g) with excess carbon in a 5.00L reaction vessel held at 900K until equilibrium is ... 
Physics
Suppose your power company charges $1.00 per kWh as its power rate. (a) What is the power in kW for an air conditioner that pulls 5 A on your standard 115 V household circuit? (b) How much does it cost you to run your air conditioner for 12 hours? 
biochemistry
I just wanted to clarify anwsers. Question 23. Nucleotides contain phosphate groups bonded to the.. A) C3' or c5' atoms B). C3 or C3' atoms C). N1 or N9 Atoms D). C3 or N9 atoms E). C3 or C5 atoms The anwser that I chosen in A. QUESTION 19. When the hydrogen ion concentration ... 
physics
A stonemason lifts a small boulder weighing Fw = 80 N from the ground onto a height = 1.50 m wall in the time t = 2.0 s. Using the values in the problem, calculate how much work she does. What power does she develop in watts? What power does she develop in kilowatts? What ... 
Chemistry
What is true about a system in chemical equilibrium? No reactants remain in the system. There are no products in the system. The amount of product equals the amount of reactant. The amount of reactant changes, but over time remains about the same. 
Chemistry
Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acidbase relationship. Identify the acid and base. Explain how the equilibrium is shifted as buffer reacts with an acid and reacts with a base. 
Chemistry
Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acidbase relationship. Identify the acid and base. Explain how the equilibrium is shifted as buffer reacts with an acid and reacts with a base. 
Chemistry
Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acidbase relationship. Identify the acid and base. Explain how the equilibrium is shifted as buffer reacts with an acid and reacts with a base. 
Chemistry
Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acidbase relationship. Identify the acid and base. Explain how the equilibrium is shifted as buffer reacts with an acid and reacts with a base. 
Chemistry
Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acidbase relationship. Identify the acid and base. Explain how the equilibrium is shifted as buffer reacts with an acid and reacts with a base. 
Chemistry
Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acidbase relationship. Identify the acid and base. Explain how the equilibrium is shifted as buffer reacts with an acid and reacts with a base. 
Chemistry
Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acidbase relationship. Identify the acid and base. Explain how the equilibrium is shifted as buffer reacts with an acid and reacts with a base. 
Physics
To streatch a certain nonlinear spring by an amount 2x requires a force F given by F=40x6x^2 where F is in newtons and x is in meters. What is the change in potential energy when the spring is stretched 2 meters from its equilibrium position? a)16 J b)28 J c)56 J d)64 J e)80 ... 
Managerial Economics
How does a price ceiling undermine the rationing function of marketdetermined prices? How could rationing coupons insure that consumers with the highest values get the limited amount of a good supplied when government price ceilings create shortage? Fully explain answer based... 
managerial economics
How does a price ceilng undermine the rationing function of marketdetermined prices? How could rationing coupons insure that cnsumers with the highest values get the limited amount of a good supplied when government price ceilings create shortages? Fully explain your answer ... 
physics
A 2.14 kg block is held in equilibrium on an incline of angle q = 67.7o by a horizontal force, F. If the coefficient of static friction between block and incline is ms = 0.314, determine the minimum value of F. Determine the normal force of the incline on the block. 
chem
Section: Ionization expressions, Weak Bases Using the equilibrium constants listed in your book, arrange the following .1 M aqueous solutions in order of increasing pH. a)NaNO2 b)HCl c)NaF d)Zn(H2O)3(OH)(NO3) Here's what I have so far: a) NaNO2 > Na+ + NO2 NO2 + H2O <... 
college physics
A 280 g wood block is firmly attached to a very light horizontal spring, as shown in the figure . The block can slide along a table where the coefficient of friction is 0.30. A force of 22 N compresses the spring 18 cm. If the spring is released from this position, how far ... 
physics
A square piece of foil with area A = 5.0 × 10^4 m^2 and mass m = 5.0 × 10^5 kg is suspended along one edge and hangs under its own weight. When light is incident perpendicular to the foil,the foil bends and reaches an equilibrium angle of 2 degrees. If the light is ... 
macoreconomics
Suppose there is a temporary but significant increase in oil prices in an economy with an upwardsloping ShortRun Aggregate Supply (SRAS) curve. If policymakers wish to prevent the equilibrium price level from changing in response to the oil price increase, should they ... 
Macroeconomics
Suppose there is a temporary but significant increase in oil prices in an economy with an upwardsloping ShortRun Aggregate Supply (SRAS) curve. If policymakers wish to prevent the equilibrium price level from changing in response to the oil price increase, should they ... 
Algebra
5. The local soccer team won the championship a several years ago, and since then, ticket prices have been increasing $20 per year. The year they won the championship, tickets were $50. Write a recursive formula for a sequence that will model ticket prices. Is the sequence ... 
Chemistry
Vapour pressure of ideal solutions at 25c the vapour pressure of chloroform and carbon tetrachloride are 26.54 and 15.27 kpa respectively. If the liquids from ideal solutions. (A) what is the composition of the vapour in equilibrium with with a solution containing 1mol of each... 
Chemistry
A block of copper of unknown mass has an initial temperature of 69.1 ∘C . The copper is immersed in a beaker containing 93.4 g of water at 21.0 ∘C . When the two substances reach thermal equilibrium, the final temperature is 24.2 ∘C . Find mass of Copper 
chemistry
a pressure of 96.5Kpa is exerted by a mixture of nitrogen gas and water vapor in a equilibrium with liquid water at 18 degree celcius , what is the partial pressure exerted by the nitrogen gas? 
Mathematics, Math
During a period of acute shortage of raw materials, the prices of some manufactured goods were raised by 25%. After the shortage was over, prices were lowered by 15%. If the original price of an article was $56, find its price after the shortage was over. Would it have been ... 
Mathematics, Math
During a period of acute shortage of raw materials, the prices of some manufactured goods were raised by 25%. After the shortage was over, prices were lowered by 15%. If the original price of an article was $56, find its price after the shortage was over. Would it have been ... 
Calculus
Joe dealt 20 cards from a standard 52card deck, and the number of red cards exceeded the number of black cards by 8. He reshuffled the cards and dealt 30 cards. This time, the number of red cards exceeded the number of black cards by 10. Determine which deal is closer to the ... 
Maths
In a bag there are a number of red and blue balls. The ratio of red to blue balls is 3:7. I add 10 balls and the ratio goes to 6:7 red to blue balls. How many blue balls are there? 3n + 7n = 10n (3n+10) + 7n = 10n + 10 6n + 7n = 10n + 10 13n = 10n + 10 3n = 10 N = 3.333 7n = ... 
Physics
The human brain consumes about 21.3 W of power under normal conditions. (More power may be required during exams...) How long can a candy bar (299 Calories) power the normally functioning brain? Note: The nutritional Calorie is equivalent to 1000 calories, or 1 kcal, as ... 
science
A motorcyclist (with a total mass of 180kg) travels up a hill. When she starts at the bottom of the hill (altitude 32m) her velocity is 43km/h. At the top of the hill (altitude 365m) she has a speed of 115km/h. The hill is 12km long and during the journey she applies a braking... 
Physics
A 34 g glass thermometer reads 21.6°C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 38.7°C. What was the original temperature of the water? I need help on this please could someone please help out.Thank you! 
Economics
Suppose the bottle water industry is competitive. If a bottle of water supplied by the typical firm has an ATC of 20 cents and the market price if 30 cents, is the bottle water industry in long run equilibrium? 
Chemistry
A piece of metal weighing 5.10g at a temperature of 48.6 degree Celsius was placed in a calorimeter in 20.00 mL of water at 22.1 degree Celsius. The final equilibrium temperature was found to be 29.2 degree celsius. What is the specific heat of the metal? 
chemical and ionic equlibrium
1. calculate H+ ion concentrates in 0.10 m acetic acid solutions. Given that dissociation constant of acetic acid in water is 1.8 * 10^5 ? 2. Calculate the concentration of H+ and OH in a 0.05 m HNO3 solutions at 25^0c ? 3. The degree of dissociation of pure water at 18^0c ... 
chemistry
The H3o+ concentration of a solution is found to e 3.40*10^6. What is the pH of the solution? what is the H3O+ concentration? what is the OH concentration? is this and acidor a base? 
physics
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 29.4 . The acceleration period lasts for time 9.00 until the fuel is exhausted. After that, the rocket is in free fall. Find the maximum height reached by the rocket. ... 
physics
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 49.0 . The acceleration period lasts for time 6.00 until the fuel is exhausted. After that, the rocket is in free fall. Find the maximum height reached by the rocket. ... 
Physics
Your instructor will walk at constant velocity beneath the announcer's booth of the varsity baseball field (a twostory tower). Your teammate will stand tall on top of the announcer booth's steps, with her or his dropping hand raised above his/her head. The egg must freefall ... 
Physics
A tunable capacitor (with variable capacitance) is charged by a U0=12 V battery and then is connected in parallel to a R=3 Ω resistor. The capacitance C(t) of the capacitor is controlled so that the current in the circuit remains constant at all times. What is the power (... 
physics
A tunable capacitor (with variable capacitance) is charged by a U0=12 V battery and then is connected in parallel to a R=3 Ω resistor. The capacitance C(t) of the capacitor is controlled so that the current in the circuit remains constant at all times. What is the power (... 
algebra
Translate the statement of variation into an equation; use k as the constant of variation. V varies jointly as s and the fourth power of u. 
Discrete Math
Prove DeMorgan's Laws for sets? Let A, B, and C be sets. Then A  (B union C) = (A  B) intersection (A  C) and A  (B intersection C) = (A  B) union (A  C) Counting problems using lists? 1.) A U.S. Social Security number is a ninedigit number. The first digit(s) may be 0... 
Physics
At a chemical plant where you are an engineer, a tank contains an unknown liquid. You must determine the liquids specific heat capacity. You put 0.500 kg of the liquid into an insulated metal cup of mass 0.200 kg. Initially the liquid and cup are at 20 ∘C. You add 0.500 kg ... 
Science
in a cladogram, a branch point represents a(n)____________ and a branch that ens without leading to living species represents___________. a. common ancestor,;extinction b.mutation; punctuated equilibrium c.extinct species: common ancestor D.common ancestor; speciation 
Chemistry
If the initial pressure of NH3(g) is 0.7317 atm, calculate the % of NH3(g) left over after the reaction reaches equilibrium according to the balanced equation. The value of Kp at 500.0 °C is 67100.00. The initial pressure of the reaction products is 0 atm. 2NH3(g) = N2(g)+3H2(g) 
Gen. Chem
Could you help me with this homework please.. 105.0 g of water is in a Styrofoam calorimeter of negligible heat capacity. The initial T of the water is 17.1oC. After 288.2 g of an unknown compound at 77.0oC is added, the equilibrium T is 25.1oC. What is the specific heat of ... 
physics
Consider a beam as shown in the figure that is 2 m long and supported by a rope. It is pressed against the wall. There is no friction between the wall and the beam. If the beam has a mass of 2 kg and a sign with a mass of 10 kg is hung off of the end of the beam, can the ... 
Physics
A force F acts to the right on a 4.81 kg block. A 2.53 kg block is stacked on top of the 4.81 kg block and can slide on it with a coefficient of friction of 0.2 between the blocks. The table has a coefficient of friction of 0.23. The acceleration of gravity is 9.8 m/s 2 . The ... 
Physics
A thermos bottle contains 250 g of coffee at 88 0C. You then decide to add 27 g of milk at 5 0C. What is the equilibrium temperature of the mixture? Assume no heat is loss to the thermos bottle and that the specific heat of water, coffee and milk is about the same. Answer is ... 
Science
Which of the following is not a postulate of the kinetic molecular theory? A. The collisions between gas molecules are elastic. B. The energy of a gas molecule is determined by quantum mechanics. C. Gas molecules travel in random, straight paths. D. The absolute temperature of... 
Algebra Sq Rt
I have a sq rt sign with a 3 on the left side. That means I'm looking for the cube of the number inside the square root? That number is 189xto the 8th power. So I multiply 189x 8 times before I find the cube or do I find the cube of 189? 
statistics
A twotailed test is conducted at the 0.10 significance level. What is the Pvalue required to reject the null hypothesis? A. Greater than or equal to .010 B. Greater than or equal to 0.05 C. Less than or equal to 0.10 D. Less than or equal to 0.05 Is it C? 
Algebra
I have to solve an inverse function. f(x)=x+6 and g(x)=x+6 f(x)=1/4x,x is equal to or not equal to 0 g(x)=1/4x,x is equal to or not equal to 0 Please help me I have been on this one problem for hours and I can't get it. This one question will determine whether or not I pass ... 
6th GMath
If the ratio of men to women in a movie theater is 1.00 when written as a decimal, what must be true? A. The ratio of women to men in the theater is 0.50. B. The ratio of women to men in the theater is 2.00. C. The ratio of women to total people in the theater is 0.50. D. The ... 
Ratio and Proportions
If a person crosscountry ski for 15 minutes, how many calories will be burned? rate of sking is 700 cal/h would I take 700cal over 1 h times x over .25? Yes. That ratio works. como sacar el ratio y proporciones gracias como sacar el radio 
Physics  charge on sphere
Two 2.0g spheres are attached to each end of a silk thread 1.20m long. The spheres are given identical charges and the midpoint of the thread is then suspended from a point on the ceiling. The spheres come to rest in equilibrium, with their centers 15cm apart. What is the ... 
Physics
A 70 kg person is having a tugofwar. The rope is horizontal and 1.3 m above the ground. This person’s center of mass is 1.0 m from the ground when he is in an upright standing position. If the force his opponent exerts on the rope is 400 N, what angle must the person be ... 
Physics
A uniform bar weighing 60N has a length of 4m and it is supported at its ends by a string. A load W=20N is placed at some point on the bar such that it is in equilibrium when the tension in the string at the left end is 80N, a) locate tge position of W. b) find the tension in ... 
Physics Equilibrium
A table is supported against a wall forming an angle with the vertical. The coefficient of static friction between the table and the floor is (μe). The frictional force of the wall on the board may be neglected. Find an expression for the maximum value that the angle can take... 
Chemistry
A 0.040M solution of a monoprotic acid is 14% ionized. Calculate the Ka for the weak acid.  so: HX <> H+ + X Ka= [H+][X]/ [HX] Since its a monoprotic acis i know the concentration of H and X will be equal And the HX will be 86% (100%14%) BUt i m not... 
physics help!
Objects of equal mass are oscillating up and down in simple harmonic motion on two different vertical springs. The spring constant of spring 1 is 155 N/m. The motion of the object on spring 1 has twice the amplitude as the motion of the object on spring 2. The magnitude of the... 
phyics
Objects of equal mass are oscillating up and down in simple harmonic motion on two different vertical springs. The spring constant of spring 1 is 175 N/m. The motion of the object on spring 1 has twice the amplitude as the motion of the object on spring 2. The magnitude of the... 
chemistry
Predict how changes effects equilibrium for N2(g) + 3H2(g) > 2NH3(g) + heat a. add heat b. remove heat c. add NH3(g) d. remove NH3(g) 
Chemistry
Initially, 1.68 mol of PCl5(g) and 0.36 mol of PCl3(g) are in mixed in a 2.00 l container. It is later found that 1.44 mol of PCl5 are present when the system has reached equillibrium. Calculate the value of the equllibrium. This is what I did: Equation: PCl5(g) <> ... 
Science
36kg of some material undergoes a process in a pistoncylinder apparatus starting with an initial volume of .057m^3 and pressure of 680kPa. The final volume is twice the initial. Compute the work done by the substance for the following processes: (a) Pressure times volume is ... 
environmental engineering
A power plant emits 120 lb of flyash per hour up the stack. The flow rate of the hot gases in the stack is 25 ft3/sec. What is the concentration of the flyash in micrograms per cubic meter? 
Business
1. What effect would the following actions have on a firm’s current ratio? Assume that new working capital is positive. a. A short term bank loan is repaid. b. A longterm debt is paid off early. For a, would the current ratio move away from 1. For b, would the current ratio... 
Math
1. 9,000,024km is equal to how many yards? 2. 7,068,000 pounds is equal to how many kilograms? 3. 25,000 ounces is equal to how many kiloliters? 4. 3,140,156,000 bytes is equal to how many terabytes? 
Economics
PLEASE ANSWER THIS! Consider the problem of a monopolist that sells its product on two different markets m, with m=1,2. Each market has an aggregate demand function given by 1200−α_m*p_m, where p_m denotes the price in market m, and α_m=m measures the ... 
math
sorry its 5t+(6 times 10 power neg.3)....and the answer should be1.08 times 10 power 2) solve thi equation ;5t(6 multiply 10 powerneg 3)=(6 multiply 10 power negative 2).am not getting the right answer;it should be 91.08 multiply 10 power negative 2) 
Physics
A small plastic ball of mass 6.30 103 kg and charge +0.150 µC is suspended from an insulating thread and hangs between the plates of a capacitor (see the drawing). The ball is in equilibrium, with the thread making an angle of 30.0° with respect to the vertical. The area of... 
Chem please help
What is the purpose of a calorimeter? A. To determine the temperature of a chemical reaction B. To determine the energy changes of a chemical reaction C. To identify the specific temperature of an unknown substance D. To measure the average kinetic energy of a substance I ... 
Physics
A force of 297.0 N is used to push a 165 kg mass 30.0 m horizontally in 3.00 s. (a) Calculate the work done on the mass. Enter a number.1 kJ (b) Calculate the power developed. Enter a number.2 kW 
Chemistry
If the concentration of a reactant is decreased, will the speed of the reaction increase or decrease? Explain. I understand that if the concentration of a reactant is INCREASED, the frequency of coliision increases, making the rate of reaction increase. How aboout when the ... 
Physics
A 35g block of ice at 14°C is dropped into a calorimeter (of negligible heat capacity) containing 400 g of water at 0°C. When the system reaches equilibrium, how much ice is left in the calorimeter? The specific heat of ice is 2090 J(kg K) and the latent heat of fusion of ... 
Chemistry
First two hw of 50 that I am trying to get a handle on. Any help would be appreciated. 3.What gaseous substance is driven off of succrose when it is heated? is the answer CO2? 7.What gaseous substance is driven off of succrose when it is reacted with acid? 17. What is the back... 
Math
Pages are being printed for a brochure. Four out of every 20 are in color. What is the ratio of noncolor pages to color pages? A.20:4 BB.4:16 C.16:4 D.16:20 A? What is the ratio of Ms to all the letters in the word MATHEMATICS? A.2/9 B.2/11 C.11/9 D.11/2 B? What is the ratio ... 
aritmetics
how do you figure two thirds of 36 is 24? please tell me! I know its simple This is the easy way to figure it. Divide 36 into 3 equal parts. The three is the bottom number. To SEE this , use dried peas or blocks. Now, put two of the parts together... The 2 is the top number. ... 
science
a substance was found to have a renal clearance that was lower than the glomerular filtration rate. In reguards to this substance what major processes of urine formation are certain to have occured. Explain 3 major urine formation processes either occurred or not 
Algebra 1
How many real number solutions exist for 2x^2 + 8x + 8 = 0 The first part is 2x to the power of 2. 
maths
could someone help please, on how to rewrite this expression as a power of the given number 1/32=2^? i don't get what to do?? :s 
physics
Trenton struggled as he lifted a 27kg mass vertically a distance of 9 meters in 4minutes with a constant velocity. Ahow much work did he do? BWhat was the average power comsumption in watts? 
Science
Calculate the power that will pull a mass of 210kg at a constant velocity of 3.9m/s down an inclined plane which makes an angle of 17 degrees with the horizontal.The frictional force is 302N 
Math Check
Solve the inequality. So i have done this problem at least three times and I keep getting the same answer. But in the back of the book the correct answer for this problem is x<or equal to 5 This is what I did & my answer dosen't match the one in the back of the book: 9(x3... 
Math. Help if you can :D
There are 14 blue marbles 8 red marbles and 12 green marbles in a jar. What is the ratio of the total number of marbles to the number of red marbles? 1: 24:8**** 2: 34:8 3: 8:34 4: 8:24 Can someone check my answers? 
Economics
Suppose that a small open economy begins to use credit cards, starting from monetary equilibrium, allowing households to hold more of their wealth in interest bearing assets. Discuss the effect on real and nominal money supply, foreignexchange reserves given: A) Fixed ...