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.
86,313 results, page 96

Physics
A cannon fires a projectile into the air at an angle of 60degrees above the horizontal. The projectile falls back on the ground at a distance d from the cannon and its maximum height is h. Ratio d/h is equal to: 
math
if the ratio of the diameters of two spheres is A to B then what is the ratio of their volumes 
EQUVALENT RATIO
Write five equivalent ratios for each ratio. 18 to 8 ? 
maths.augusco
720 apples is shared in the ratio 1/5 3/10 7/1 what is the ratio of each 
math
Simplify this expression by using the properties of exponents.You may leave your answer as a number to a power. (2c)^5(2c^9)^6= 
math 8
can you write any whole number as the sum of powers of 2 and only use each power once 
math
Sales exercised by stretching and jogging 5 days last week. a.He stretches for a total of 25 minutes during the week. b.He jogged for an equal number of minutes each of the 5 days. c.He exercised for a total of 240 minutes. Elena also exercised by stretching and jogging 5 days... 
6th grade math
At a country concert, the ratio of the number of boys to the number of girls is 2:7. If there are 250 more girls than boys, how many boys are at the concert? 
4th Grade Math
The ratio of the number of dogs to the number of cats at an animal shelter is 5:4, if there is a total of 153 cats and dogs, how many cats are in the shelter 
Chemistry
you add 0.05ml of 0.10M agno3 to 4ml of 2.0 nacl it forms saturated solution of agcl<> ag+ + cl using a saturated solution you set up ag  ag+( test solution after reaction)  ag+(1.0ml)  ag how do we calc the equilibrium of ag+ of the test solution after reaction ? 
ethics
There is a difference between power and authority. Which statement below best describes the relationship and/or difference between power and authority? All supervisors have power and authority. Supervisors gain authority from the people they supervise and power from those who ... 
Pre Calculus 1
thirty percent of a radioactive substance decays in four years. assuming the decay is exponential, find the half life of the substance. the beginning of 1975 the population of a country was 40 million and growing at a rate of 3% per year. Assume that the growth is exponential... 
chem
a 275mL sample of vapor in equilibrium with 1propylamine at 25C is removed and dissolved in 0.500L of H20. For 1propalamine, Kb=3.72*10^4 and the vapor pressure at 25C is 215 torr. (a)What should be the pH of the aqueous solution? (b) How many mg of NaOH dissolved in 0.500L... 
chem
ive tried the ice method but i keep on getting it wrong please help. If the initial pressure of NH3(g) is 3.168 atm, calculate the % decomposition of NH3(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kp at 427.0 °C is 12800.00. The... 
Honors Chemistry
I have two questions on my review study guide that go like this: 1) What is the equation for calculating the energy change that occurs when a substance changes state? 2) What is the equation for calculating the energy change that occurs when a substance increases in ... 
Microeconomics
I am on the chapter for the factors of production: Question: A firm that hires two types of workers—some with computer skills and some without. If technology advances so that computers become more useful to the firm, what happens to the marginal product of the two types? ... 
Physical Science
Determine the concentration of the HCl in a swimming pool?given 100ml of a standard solution of Na2CO3 of concentration 0.05mol.dm 
Chemistryhelp
0.5g of Solid A is dissolved in 1L solvent to give a concentration of concentration 0.5g/L. UV absorbance spectrum was collected. How to calculate the absorptivity on the dried basis? 
Science , Biology
Are both of osmosis and diffusion movement of high concentration to low concentration? just a deferences of water or molecures? 
Chemistry
Please help Suppose that 0.250mol of methane, CH4(g), is reacted with 0.400mol of fluorine, F2(g), forming CF4(g) and HF(g) as sole products. Assuming that the reaction occurs at constant pressure, how much heat is released? Substance ΔH∘f (kJ/mol) C(g) 718.4 CF4(g... 
Chemistry  Science (Dr. Bob222)
The following reaction has a positive value of ΔG°. 2H2O(g) → 2H2(g) + O2(g) Which of the following statements must be true? A. The reaction is slow. B. The reaction will not occur. That is, when H2O(g) is introduced into a flask, no O2 or H2 will form even over a ... 
Chemistry
HELP PLEASE. I have no idea how to set this up. I tried using the q=mc(change in temp) equation but its not working out. A 59.8 g block of an unknown metal at 87.5 degrees Celsius was dropped into an insulated vesssel containing approximately 33 g of ice and 23 g of water at 0... 
Physics
Which are in static equilibrium? 1. A box sliding down a ramp. 2. A baseball after being hit. 3. A box sliding along a horizontal surface. 4. A perfectly upright freely spinning top 5. A freely swinging simple pendulum 6. A spinning astronaut floating out in deep space. 7. A ... 
Mathmatics
A pile of sand that is stockpiled for winter road treatment is in the shape of a perfect cone. The beginning diameter is 110ft and the height at the center is 24ft. Assume wet sand weighs 3400 lbm/yd3. a) How many cubic yards of sand are in the pile? b) What is the mass o the ... 
Physics
A cylindrically shaped piece of collagen (a substance found in the body in connective tissue) is being stretched by a force that increases from 0 to 0.0436 N. The length and radius of the collagen are, respectively, 2.90 cm and 0.0815 cm, and Young's modulus is 3.1 x 106 N/m2... 
Physics
Does the filament of a bulb have constant resistance, constant voltage or constant current? I would think it's constant current. But can someone logically explain why? I can't understand it much. 
Infinite math
use the M method to solve the following linear programming problem: Minimize C+ 5x+10x+15x Subject to 2x+3x+x <(or equal to) 24 x2x2x >(or equal to) 1 x,,x,x>(and equal to) 0 
Physics
An air puck of mass 0.289 kg is tied to a string and allowed to revolve in a circle of radius 0.51 m on a horizontal, frictionless table. The other end of the string passes through a hole in the center of the table and a mass of 0.98 kg is tied to it. The suspended mass ... 
physics
how to determine the amount of water in the container when you are given a 200g piece of aluminium at 90 degrees celcius is placed in a 100g glass container which holds an unknown amount of water at 20 degrees celcius .if the equilibrium temperature is 21.6 degrees celsius(... 
Physics
A raft is constructed of wood having a density of 6.00x102 kg/m3. Its surface area is 5.40 m2 and its volume is 0.45 m3. When the raft is placed in fresh water, to what depth h is the raft submerged by its weight? The density of fresh water is 1000 kg/m3. Hint: Use Newton’s ... 
Social studies
what effect did the three fifths compromise have on southern states? It helped increase the number of slaves traded •• It gave the south the power to outvote the north It limited the number of states that allowed slavery It gave those states more representation in congress 
chemistry
A is a solution of trioxonitrate(v) acid, HNO3, of unknown concentration. B is standard solution of sodium hydroxide containing 4.00g per dm3 of solution. 25cm3 portions solution B required an average of 24.00cm3 of solution A for neutralization, using 2drops of methyl orange... 
chemistry
you add 0.05ml of 0.10M agno3 to 4ml of 2.0 nacl it forms saturated solution of agcl<> ag+ + cl using a saturated solution you set up ag  ag+( test solution after reaction)  ag+(1.0ml)  ag how do we calc the equilibrium of ag+ of the test solution after reaction... 
Physics
I(mass:80kg) sit down in the center of a trampoline and the surface sinks down by a distance of 10 cm when I reach equilibrium. How far above the ground in m must the trampoline be placed so that if I jump onto the trampoline from a height of 3 m above the surface of the ... 
Chemistry: Need Help
Suppose there is a simulation of 25 helium molecules and 25 nitrogen molecules on the right side of a box before the rate of effusion. Suppose you carry out this simulation and it does not give a precise quantitative reflection of Graham's Law. >What could be done to ... 
Stats
In the game Roulette, a ball spins on a circular wheel that is divided into 38 arcs of equal lenght, numbered 00, 0, 1, 2, ... , 35, 36. The number on the arc on which the ball stops is the outcome of one play of the game. The numbers are also colored as follows: 1, 3, 5, 7, 9... 
chem
If it takes 84.2 min for the concentration of a reactant to drop to 20.0% of its initial value in a firstorder reaction, what is the rate constant for the reaction in the units min1? 
Chemistry
The solubility product constant of Calcium hydroxide is 6.5 * 10^6 . If 0.10 mo of sodium hydroxide is added to 1 L of 0.0001 M Ca(OH)2, what is the final concentration of the calcium ion? Show your work. 
Physics
In an actionadventure movie, the hero lifts the 89kg villain straight upward through a distance of 2.0 m in 0.47 s at a constant speed. What power does the hero produce while doing this? 
physics
find the power by a man if he runs at constant speed of 5km/h along an ascending road which makes 5 degree with the horizontal if the mass of yhe man is 60 kg. 
physics
a 10kg toy mootorized boat uses 2.0 W of power, has a constant accel from rest and reaches a certain speed in 10 s on a horizontal surface. what was the final speed ? 
Chemistry
Elements with an even number of protons and neutrons A. never undergo alpha decay emission. B. have a single magic number of protons or neutrons C. always have a protontoneutron ratio of about one D. are usually stable E. are usually unstable 
physics
A 500.0 g metal block absorbs 1.125 × 104 J of heat to raise its temperature by 50.0 K. What is the substance? Specific Heats of Selected Substances ______________________________________ Substance C [J/(kg•K)] Water (ice)2,060 Iron450 Aluminum897 Gold 130 Copper 385 ... 
math
Last one, The sum of two numbers is 48. Four times the smaller number is equal to twice the larger number. Find the two numbers. ANS: 16, 32 Can someone please explain to me how you get this answer? 
math help please urgent
the difference of two numbers is 27. the first number is equal to one more than twice the value of the second number. find both numbers. please show work. 
math
A bag contains n cards, each having one of the consecutive numbers (1, 2, 3, 4, .... n) written on it, with each number being used once. The probability of drawing a card with a number less than or equal to 10 is 4/10. How many cards are in the bag? 
English
Could you please check these other sentences on the same theme? Thank you. I tried to revise the punctuation myself. 1) A Jewish council was established to regulate the internal life of the ghetto. 2) Jews were regularly sent to either a concentration camp or a death camp. 3) ... 
Civics
Lord Acton, a British historian, was famous for saying, "All power corrupts. Absolute power corrupts absolutely." He believed that any individual or group having too much power was a bad thing. With which statement regarding systems of government would Lord Acton most likely ... 
Algebra
The sum of two numbers equal 25. The second number is 4 times larger than the first number. What are the two numbers 
math
four times a number plus three times the sum of a number and four is equal to negative nine 
Chemistry
Dinitrogen tetroxide decomposes to nitrogen dioxide: N2O4(g)→2NO2(g)ΔHorxn=55.3kJ At 298 K, a reaction vessel initially contains 0.100 atm of N2O4. When equilibrium is reached, 58% of the N2O4 has decomposed to NO2. What percentage of N2O4 decomposes at 350 K ? Assume that ... 
Physics..Elena or anybody please help
I(mass=80 kg) sit down in the center of a trampoline and the surface sinks down by a distance of 10 cm when I reach equilibrium. How far above the ground in m must the trampoline be placed so that if I jump onto the trampoline from a height of 3 m above the surface of the ... 
indices
Find a common factor of (527 to the power 379 + 473 to the power 379) and (527 to the power 166  473 to the power 166) 
math
if 1790 maga watts of power,out of 3000 mega watts generated by a power utility, reach the destination, what percentage of the generated power reaches its destination. please show work 
calculus
The region R is defined by 1(</=)x(</=)2 and 0(</=)y(</=)1/(x^3). a) Find the number 'a' such that the line x=a divides R into two parts of equal area. b) Then find the number 'b' such that the line y=b divides R into two parts of equal area. 
MATH 157
what is the ratio of the surface areas for a pair of similar cylinders when the ratio of the heights is 1:3? i don't understand this at all!! 
applied maths inarchitecture technology
ig the area ratio for two similar rectangular plots is 1/25, what is the ratio of their lengths 
accounting
compute the working capital, current ratio, and quick ratio after each transaction for boole company 
Algebra grade 7
find a ratio equivalent to each ratio. then use the ratios to write a proportion 8/14 4/18.. I am so confused. Pleasse help me???? Thank ya'll. 
Math 8  HELP!!!!!
Ratio, Proportions, and Similarity Similar Figures A room is 36 ft long and 18 ft wide. What is the length to width ratio? 
algebra
Find the distance, d,across the river. Assume that the ratio of d to 90ft is the same as the ratio of 100ft to 50ft 
Algebra
If the angles of triangle are in the ratio of4:1:1then find the ratio in the smallest side / perimeter of the tringle 
Geometry
two similar solids have corresponding lengths in the ratio 2:5. Determine the ratio of the lateral area 
Physics
Two lead spheres at the same temperature have radii in the ratio 1:2.what is the ratio of their heat capacities 
geometry
What is the ratio for the surface areas of the cones shown below, given that they are similar and that the ratio of their radii and altitudes is 4:3? 
science
what is the pH of the following 1. [H+] = 10 negative 12th power M 2. [H+] = 10 negative 2nd power M 3. [H+] = 10 negative 7th power M 
Social Studies
To many people the most meaningful of these classifications [of government] is the one that depends on the number of persons who can take part in the governing process. why might this particular classification be most meaningful to people? A.it indicates the balance of power ... 
Social Studies
o many people the most meaningful of these classifications [of government] is the one that depends on the number of persons who can take part in the governing process. why might this particular classification be most meaningful to people? A.it indicates the balance of power in... 
Math
Your company determines that the number of students S in thousands in the United States from 1990 to 2003 the participate in high school athletic programs can be modeled by the equation S= .021x^5.572x^4+3.3x^3+16.173x^21.674x+5267. 1. Create a tableof values for the model ... 
Math
In the cafetería,100 milk cartons were put out for breakfast at the end of breakfast 27 remained. What Is the ratio of the Number of milk cartons taken to the total Number of milk cartons? 
English
Posted by rfvv on Tuesday, August 31, 2010 at 8:19pm. 1. There is a girl who is reading a book with legs crossed on the sofa. 2. There is a girl reading a book with her knees folded and raised on the sofa. 3. There are a dog and a cat sleeping on a big coushion. 4. There is a ... 
Chemistry
If you add Na2CO3 and AgNO3 together in a test tube what exactly would you observe and what would be the equation for the equilibrium system? If you then add HNO3 to the solution what exactly would you observe and what would be the equation for that reaction? 
Calculus
How can I prove this series alternating series converges(this is the answer)? (1)^2*(2/3)^n I tried it this way: an = (2/3)^n, then i just broke it down. 2^n/(3^n) and i took the ratio of it and got 2/3 which does not equal to one which would mean the series diverges.. but ... 
chem
In an equilibrium mixture of HCl, Cl2 and H2, the partial pressure of H2 is 4.2 mPa and that of Cl2 is 8.3 mPa. What is the partial pressure of HCl at 500 oK given that at that temperature Kp = 4.0 x 1018 for H2(g)+ Cl2(g)> 2HCl(g) 
CHEMISTRY
2NO(g) + O2(g) > 2NO2(g) Derive the theoretical rate law and indicate whether or not this is a possible mechanism for the above reaction: (1) 2NO(g) <>* N2O2(g) (fast) (2) N2O2(g) + O2(g) > 2NO2(g) (slow) Extra Info: This reaction is third order overall. NO ... 
Chemistry
How will the equilibrium: Heat energy + CH4 + 2H2S = CS2 + 4H2 be affected by the following? a) A decrease in temperature? b) The addition of H2 c) The removal of some CH4 d) An increase in the volume of the container e) The addiotion of a catalyst. i know that [CH4] goes up... 
Chemistry12
How will the equilibrium: Heat energy + CH4 + 2H2S = CS2 + 4H2 be affected by the following? a) A decrease in temperature? b) The addition of H2 c) The removal of some CH4 d) An increase in the volume of the container e) The addiotion of a catalyst. i know that [CH4] goes up [... 
physic
Eight people are involved in a tugofwar. The blue team members pull the rope with the forces of 220 N, 340 N, 180 N, and 560 N. Three members of the red team pull it with the forces of 250 N, 160 N, and 420 N. With what force must the fourth person pull the rope to maintain ... 
Math
Peanuts, walnuts, and cashews are mixed by volume in the ratio 5:3:2, to make a party snack. The number of cups of walnuts needed to make 12 cups of party mix are between: a) 1 and 2 b) 2 and 3 c) 3 and 4 d) 4 and 5 Math  Ms. Sue, Monday, February 20, 2017 at 5:23pm What is ... 
chemistry
If the initial pressure of SO3(g) is 4.775 atm, calculate the % of SO3(g) left over after the reaction reaches equilibrium according to the balanced equation. The value of Kp at 1000 K is 24.40. The initial pressure of the reaction products is 0 atm. 2SO3(g) = 2SO2(g)+O2(g) ... 
physics
A combination of .403 kg of water at 45.1 C, .471 kg of aluminum at 41.1 C, and .307 kg of copper at 50.4 C is mixed in an insulated container and allowed to come to thermal equilibrium. Determine the final temperature of the mixture. Neglect any energy transfer to or from the... 
Maths
the points A,B,C and D lie on a straight line. The ratio of the length of AB to the length of BC is 3:4 and the ratio of the length of AC to the length of CD is 2:1. Find the ratio of the length of BC to the length of AD ? 
chemestry
A calorimeter contains 16.0 of water at 15.0. When 1.60 of (a substance with a molar mass of 58.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 27.5. Calculate the enthalpy change, , for this reaction per mole of . Assume that the ... 
Chemictry
A calorimeter contains 32.0 of water at 11.5. When 1.70 of (a substance with a molar mass of 74.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 26.5. Calculate the enthalpy change, , for this reaction per mole of . Assume that the ... 
Earth Science
Using Kepler's equal area law, explain why the speed of an object in a perfectly circular orbit is constant. HELP!!!!!!!!!!!!!! 
physics
For an object travelling at a constant velocity, how does the dispalcement change over equal time intervals? I do not understand this question pls help. 
chemisty
the solubility product constant (Ksp) of ca(oh)2 at 25 C is 4.42*10^5. a 500 ml of saturated solution of ca(oh)2 is mixed with equal volume of .4M naoh. what mass of ca(oh)2 is precipitated? 
economics
If tbone steak cost 12.00 a lb and 1st util is 48, 2nd is 42, and 3rd util is 36 and we also buy ground round at 4.00 a lb and we derive 24 utils for the 1st lb, 16 for the second and 12 for the third and all we have to spend is 40.00 then how many lbs. of tbone and ground ... 
physics
the three weights are hanging in static equilibrium. The two weights left and right of center have a mass of 100 Kg. The weight in the center has a mass of 100 Kg. Treat the strings as massless and the pulleys as frictionless. If the sin of the angle theta in the figure is sin... 
ECONOMICS
Imagine a firm that hires two types of workers: some with computer skills and some without. If technology advances so that computers become more useful to the firm, what happens to the marginal product of the two types of workers? What happens to equilibrium wages? Explain. 
Chemistry
Initially a 1 L vessel contains 10 moles of NO2 and 6 moles of O2. At equilibrium, the vessel contains 8.8 moles of NO2. Determine Kc. Please help 
Algebra
For what real number k does the product (25 + ki)*(3+2i) equal a real number? 
Chemistry
The reaction 2B>C + 2D is found to be zero order when run at 990 degrees C. If it takes 3.3X110^2 s for an initial concentration of B to go from 0.50 M to .20 M what is the rate constant for the reaction? what is the half life of the reaction under these conditions? 
Maths
The first term of an AP is 12 and that of a GP is 6. The common difference and the common ratio are equal, so as are the sum of the fist 3 terms. Find the possible values of the common difference? 
Math
there is a track next to the barbecue area the track is 1/4 mile long. a group of students have a relay race. they run around the track 4 times. draw a number line to show how many miles the students can. use 0 and 1 as points on your number line. divide the number line into ... 
chemistry
Calculate the solubility of in water at a partial pressure of of 140. torr at 25°C. The Henry's law constant for is for Henry's law in the form C = kP, where C is the gas concentration (mol/L). 
macroeconomics
I am not sure how to draw the graphs can anyone help answer this question for me? Suppose that the supply schedule of Maine lobster is as follows: Price of Lobster Quantity of lobster supplied (Per Pound) (Pounds) $25 800 20 700 15 600 10 500 5 400 Suppose that Maine lobsters ... 
physics
The value of specific heat for copper is 390 J/kg⋅C∘, for aluminun is 900 J/kg⋅C∘, and for water is 4186 J/kg⋅C∘.What will be the equilibrium temperature when a 275g block of copper at 255∘C is placed in a 145g aluminum calorimeter cup... 
Algebra
The power in an electric circuit varies inversely with the resistance. If the power is 1200 watts when the resistance is 12 Ohms, find the power when the resistance is 6 Ohms. 
Algebra 1
The size of a certain cell is 2.5 * 10 to the 9 power m. Another cell is 1.5 * 10 to the 3rd power larger. How large is the larger cell in scientific notation? my answer is 3.75 * 10 to the 6 power m