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 6

MATH
i need help filling this out! 4x10=323x 4x10+____=323x+22 ____10+____=32+_____ ___=___ ___=___ x=___ ok you need to solve for x. remember the rule, whatever you do on the left side, you do to the right side and vice versa. on the second step, they add 22 to the right side... 
English
Type the prepositional phrases in the boxes. Kentucky bluegrass was brought to America from Europe. ____?____ _____?_____ i put (to) and (from) then i put (from) (europe) 
Chemistry
3.0 moles each of carbon monoxide, hydrogen, and carbon are placed in a 2.0 liter vessel and allowed to come to equilibrium according to the equation: CO(g)+H2(g)>C(s)+H20(g) if the equilibrium constant at the temperature of the experiment is 4.0, what is the equilibrium ... 
chemistry
For the equilibrium below at 400 K, Kc = 7.0. Br2(g) + Cl2(g) equilibrium reaction arrow 2 BrCl(g) If 0.85 mol of Br2 and 0.85 mol Cl2 are introduced into a 2.0 Lcontainer at 400. K, what will be the equilibrium concentrations of Br2, Cl2 and BrCl? I tried to set it up and ... 
computer
name the four major types of components that makeup a computer. C__ P__ UNIT (CPU) R___ or M __ memory (RAM) Auxiliary S____ ____ put Units ____ put Units 
statistics
A person scores 140 on an intelligence test with mean 100, a standard deviation of 15, and a reliability of 0.6. We can be 95% certain that this person's TRUE intelligence is between ____ and ____. Pick the answer that is closest to the correct answer 
Desktoping
In a bibliography, each source should be formatted using a ____ indent. A. center B. hanging C. left D. right I got D. Press ____ in copy selected text to the clipart A. Ctrl + A B. Ctrl + B C. Ctrl + C D. Ctrl + D I got A. 
chemistry
The equilibrium constant Kc for the reaction C <> D + E is 7.90 * 10^5. The initial composition of the reaction mixture is [C]=[D]=[E]=1.10*10^3. What is the equilibrium concentrations of C, D, and E? C=? D=? E=? chemistry  DrBob222, Monday, November 5, 2012 at 12:... 
Chemistry
NOCL(g) decomposes to from nitrogen monoxide gas and chlorine gas. The equation is 2NOCL > 2NO +Cl2 At a certain temperature the equilibrium constant is 1.60 x 10^6. Calculate the equilibrium concentrations of all gases if 0.800 moles of NOCL are placed in a 2.00 L ... 
English
Word Bank : apparel besiege compress denounce dispatch douse expressly famished forsake gainful immense inept ingenious instantaneous irk libel misgiving oaf recede repast Some people hailed the man as a genius others ____ him as a quack Denounce? Your ____ can be neat and ... 
AP Chem
A mixture of 1.380 g of H2 and 66.80 g of Br2 is heated in a 2.00L vessel at 700 K. These substances react as follows. H2(g) + Br2(g) equilibrium reaction arrow 2 HBr(g) At equilibrium the vessel is found to contain 0.605 g of H2. (a) Calculate the equilibrium concentrations ... 
chemistry
An equilibrium mixture of SO2, O2, and SO3 at 1000 K contains the gases at the following concentrations: [SO2] = 3.77 103 mol/L, [O2] = 4.30 103 mol/L, and [SO3] = 4.13 103 mol/L. Calculate the equilibrium constant, K, for the following reaction. 2 SO2(g) + O2(g) 2 SO3(g) 
Science
Since no one answered, and I really need help: So I am doing this science experiment about light. I chose to do one where you put a pencil in a glass of water and the light makes it look like it's bending. There is a chart of measurements that you need to fill out and I have ... 
Science
Since no one answered, and I really need help: So I am doing this science experiment about light. I chose to do one where you put a pencil in a glass of water and the light makes it look like it's bending. There is a chart of measurements that you need to fill out and I have ... 
Chemistry
What are the equilibrium concentrations of all the solute species in a 0.95 M solution of hydrogen cyanide, HCN? The Ka value = 6.2 x 10^10. (a) [H3O+], M; (b) [OH], M; (c) [HCN], M; (d) What is the pH of the solution? For HCN So far i have calculated the concentration of ... 
ziploc bags
how big are quart size ziploc bags in centimeters? ____ x ____ ???? 
statistics
Every year thousands of students take the SAT'S. RECENT TRENDS SHOW THAT THE SCORES ON THE VERBAL SECTION FOLLOW AN APPROX. NORMAL DISTRIBUTION WITH MEAN 550 AND STANDARD DEVIATION OF 110 68.26% OF THE STUDENTS WHO TAKE THE SAT VERBAL SCORE BETWEEN ______ AND _____ 95.44% OF ... 
AP CHEM
Kc = 1.87 103 for the following reaction. PH3BCl3(s)=>PH3(g) + BCl3(g) (a) Calculate the equilibrium concentrations of PH3 and BCl3 if a solid sample of PH3BCl3 is placed in a closed vessel and decomposes until equilibrium is reached. (b) If the flask has a volume of 0.400... 
Math
Rachel will make juice drink by mixing sugar, pineapple juice, and water in the ratio of 2:5:7 cups. If she uses 20 cups of pineapple juice, she has to mix ____ cups of sugar and ____ cups of water to the juice 
English
1.Rob or Fred ____ basketball after school. (plays play) plays 2.The teacher or the students ____ the display to visitors. (explain explains) explain 3.Neither Grace nor Kirk ___ the name. (remember remembers) remember 4.A laboratory and an office ____ on the first floor. (is ... 
Chem equilibrium
I don't understand part b NO(g) + O3(g) <=> NO2(g) + O2(g) (a) If 2.50 moles of NO and 3.30 moles of O3 are placed in a 5.30 L flask, what is the equilibrium concentration of O2? Kc = 5.00 ✕ 106. .00121 (I got this correct) (b) What percent of the O3 reacts? My ... 
English
Analogies 1.Advent:arrival::exaggeration:____ 2.Allude:hint::____:self evident I need help making similies i don't quite understand how to do them. Metaphors 1.Leaping with laughter 2.Life has a tendency to come back and bite you in the rear Idioms 1.A slap on the wrist 2.A ... 
chemistry
At 1285 degree C the equilibrium constant for the reactin Br2(g) <> 2Br(g) is Keq= 1.04 * 10^3. A 0.200 L vessel containing an equilibrium mixture of the gases has 0.245 Br2(g) in it. What is the mass of Br(g) in the vessel? Please help, Thanks!! 
science
Acetic acid (CH_3COOH) is a weak acid. a) Write the symbolic equation showing the ionisation of acetic acid. b)Given that an acetic acid solution of pH 4.8 has a hydrogen ion concentration of 1.58 * 10^5 mol L^1, what is the concentration of the acetate ion at equilibrium? c... 
Chemistry
At 3745°C, K = 0.093 for the following reaction. N2(g) + O2(g) equilibrium reaction arrow 2 NO(g) Calculate the concentrations of all species at equilibrium for each of the following cases. (a) 2.0 g N2 and 3.0 g O2 are mixed in a 1.3L flask. [N2] [O2] [NO] (b) 1.5 mol pure ... 
chem
The equilibrium constant Kc equals 5.90 for the reaction CH3COOH + C2H5OH <==> CH3COOC2H5 + H2O Find the molar concentrations of acetic acid, ethanol, ethyl acetate, and water at equilibrium when .10 M acetic acid and .20 M ethanol are allowed to equilibrate. I started ... 
Chemistry
The standard solution of FeSCN2+ (prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN) has an absorbance of 0.530. If a trial's absorbance is measured to be 0.150 and its initial concentration of SCN– was 0.00070 M, the equilibrium concentration of ... 
lgebra
The sum of three consecutive natural numbers is 963, find the numbers. (A) First, write out an equation that models the relationship between these three numbers: x + ____ +______ = 963 2nd number 3rd number (B) Now, simplify the left side of your equation: ____________ = 963 (... 
CHEMISTRY
at 1500 celcius the system 2NO<>N2+O2 was allowed to come to equilibrium. the equilibrium concentrations were NO=0.00035M N2=0.040M O2=0.040M What is the value of Kc for the system at this temperature? The answer they give is 1.3 x10^4 Im getting 2.2 x10^1 i don't ... 
Chemistry
Calculate the equilibrium concentrations of N2, H2, and NH3 present when a mixture that was initially 0.10M N2, 0.10 M H2, and 0.10 M NH3 comes to equilibrium at 500 degrees C. N2(g) + 3H2(g) <> 2NH3(g) Kc = 0.040 (at 500 degrees C) I'm getting confused with the math. 
English
Word box affluence arrears cascade cringe crotchety format immobile impassable innovation jovial manacle martial minimum nimble onset partition perishable retrieve sinister taut The feeling of ____ I had when I was paid lasted only until I had finished taking care of my bills ... 
Chemistry
Need help in AP chemistry on Equilibrium When heated, hydrogen sulfide gas decomposes according to the equation 2 H2S(g) ⇄ 2 H2(g) + S2(g) A 3.40 g sample of H2S(g) is introduced into an evacuated rigid 1.25 L container. The sealed container is heated to 483 K, and 3.72 ... 
math homework
9. Jonathan and his band want to record and sell CDs. The recording studio charges an initial setup fee of $250, and it charges $6.00 to burn each CD. a. Define the variables in this situation: • Let ____ = __________________________ • Let ____ = ... 
Chemistry
A reaction mixture of 4.0 mL of 0.002 M SCN and 5.0 mL of 0.002 M Fe3+ is diluted to 10.0 mL with 0.1 M HNO3 to form the bloodred FeNCS2+ complex. The equilibrium molar concentration of the FeNCS2+ determined from a standardization curve is 1.5x10^4 mol/L. Calculate, in ... 
chemistry
A reaction mixture of 4.0 mL of 0.002 M SCN and 5.0 mL of 0.002 M Fe3+ is diluted to 10.0 mL with 0.1 M HNO3 to form the bloodred FeNCS2+ complex. The equilibrium molar concentration of the FeNCS2+ determined from a standardization curve is 1.5x10^4 mol/L. Calculate, in ... 
Chemistry
After 4.00 mol of C2H4(g) and 2.50 mol of Br2 (g) are placed in a sealed 1.0L container, the reaction reaches equilibrium and is written following: C2H4(g) + Br2(g) > C2H4Br2(g) ... Calculate the equilibrium concentrations of all three substances. 
French
Souligne l'adjectif dans la premiere phrase, puis complete la deuxieme phrase avec l'adverbe qui correspond. Exemple: Le dectective Lee est logique. Il a travaille. 1. La dectective Lee est logique. Il a travaille______. 2. La detective Jura est serieuse. Elle a _____. 3. Le ... 
Chemistry
In the reaction, PCl3 + Cl2 > PCl5 the concentration of the reactants at equilibrium were each determined to be 7.2 mol/L, and the product at 0.050 mol/L. Calculate the equilibrium constant (rounding to 2 significant figures and using scientific notation), and state ... 
Chemistry
A 0.170mole quantity of CoCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Co2 ions at equilibrium? Assume the formation constant (Kf) of Co(NH3)62 is 5.0× 1031 M–6. I don't really know how to start. At first I thought about setting up an ICE ... 
spanish
This is on demonstrative adjectives and are fill in the blanks. ____ pantolones son bonitos y el precio no es muy alto. Si, las dos cosas son geniales. Tambien me gustan ____ sueteres que estan cerca de ti. ?De que talla es _____ sueter negro, el de solo un color? 
Physics
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.050 s, during which time it experiences an acceleration of 380 m/s2. The ball is launched at an angle of 51° above the ground. Determine the horizontal and vertical ... 
chemistry
For the reaction at equilibrium: 3Fe(s) + 4H2O(g) Fe3O4(s) + 4H2(g), removing some of the product, Fe3O4(s), would: Answer A. Increase the value of the equilibrium constant, K B. No change C. Decrease the value of the equilibrium constant, K D. Shift the equilibrium to the ... 
MATH
A 0.26 M solution of a weak acid HA is 0.35 % ionized. What are the H+ , A , and HA concentrations at equilibrium? What is Ka? 
apchemistry
The numerical value of the concentration equilibrium constant for the gaseous reaction 2 SO2 + O2 *) 2 SO3 is 0.5 at temperature T. When a reactionmix ture is brought to equilibrium, [O2] is found to be 2.0 M and [SO3] is found to be 10 M. What is the equilibrium ... 
Chem
Determine the concentrations of K2SO4, K , and SO42– in a solution prepared by dissolving 2.84 × 10–4 g K2SO4 in 2.25 L of water. Express all three concentrations in molarity. Additionally, express the concentrations of the ionic species in parts per million (ppm). Note: ... 
CHEMISTRY
Determine the concentrations of Na2CO3, Na , and CO32– in a solution prepared by dissolving 2.22 × 10–4 g Na2CO3 in 2.25 L of water. Express all three concentrations in molarity. Additionally, express the concentrations of the ionic species in parts per million (ppm). ... 
Chemistry
Please show step by step with answer The equilibrium constant, Kc, for the equilibrium N2O4 (g) <> 2NO2(g) is 4.6 x 10^3 If the equilibrium mixture contains 4.0×10^2 M NO2, what is the concentration of N2O4? 
Algebra II
Solve the following word problem. The length and width of a rectangle are (x + 4) cm and x cm. Respectively, a square has the same perimeter as this rectangle. If you add the areas of the rectangle and the square, the result is 94cm^2. Solve for x. Note: Write your answer as x... 
Chemistry
If Kc = 0.143 at 25°C for this reaction, find the equilibrium concentrations of C6H12 and CH3C5H9 if the initial concentrations are 0.200 M and 0.075 M, respectively. a. [C6H12] = 0.041 M, [CH3C5H9] = 0.041 M b. [C6H12] = 0.159 M, [CH3C5H9] = 0.116 M c. [C6H12] = 0.241 M, [... 
general chemistry
Determine the concentrations of Na2CO3, Na , and CO32– in a solution prepared by dissolving 2.57 × 10–4 g Na2CO3 in 1.50 L of water. Express all three concentrations in molarity. Additionally, express the concentrations of the ionic species in parts per million (ppm). ... 
equilibrium constant (Kp)
What is the equilibrium constant "Kp" at 200 C for the reaction below: P4(s) + 6 Cl2(g) >< 4 PCL3(l) Given the following at 200 C P4(s)+ 10 Cl2(g) >< 4 PCl5(s) Kc=8.12 PCl3(l)+ Cl2(g) >< PCl5(s) Kc=0.771 Answer: 6.7*[10^(9)] not sure what to do. ... 
chemistry
Calculate the equilibrium concentrations of all three substances. Kc=1.7e3 Q=3.6e3 [NO]=0.0015 mol/L [O2]=0.025 mol/L [N2]=0.025 mol/L I cannot figure out the concentration for NO...please help! thank you! 
chem help!
The equilibrium constant, Kc, for the equilibrium N2O4(g)←→2NO2(g) is 4.6×10−3 . If the equilibrium mixture contains 5.0×10−2M NO2, what is the concentration of N2O4? 
Spanish
23. "Vas a traer los refrescos?" "Sí, Voy a ____." a. traerlo b. traerlos c. traerlas d. traerla B? 24. Los estudiantes tienen que hacer fila para entrar en el _____. a. asiento b. oficina c. cafeteria d. auditorio C 25. "¿Qué hay en la pared de tu sala de clases?" "Hay ... 
chemistry
A mixture consisting of 0.150 M N2(g) and 0.612 M H2(g) reacts and then reaches equilibrium according to the equation: N2(g) + 3H2(g) ⇋ 2NH3(g) At equilibrium, the concentration of ammonia is 0.213 M. Calculate the concentration (molarity) of H2(g) at equilibrium to 3 ... 
math ALG 2!
1.)A number decreased by 32 is 58. Find the number. The number is ____. (Give only the value of the number as your answer. 2.)The product of 14 and n is 28. Write the algebraic equation 3.)A blue bike is $14 less than a red bike. The sum of their prices is $300. How much is ... 
math ALG 2!
1.)A number decreased by 32 is 58. Find the number. The number is ____. (Give only the value of the number as your answer. 2.)The product of 14 and n is 28. Write the algebraic equation 3.)A blue bike is $14 less than a red bike. The sum of their prices is $300. How much is ... 
math urgent :(
1.)A number decreased by 32 is 58. Find the number. The number is ____. (Give only the value of the number as your answer. 2.)The product of 14 and n is 28. Write the algebraic equation 3.)A blue bike is $14 less than a red bike. The sum of their prices is $300. How much is ... 
Civics
Two advantages of a confederation are that it ____ and ____. A. Prevents abuse of power by a national goverment ; preserves local identity. B. Concentrates power in state governments; make national goverment too weak to meet local needs C. Prevents abuse of power by state ... 
Chem
Can someone explain how to do this problem? For the equilibrium reation below, 288g of liquid water and 448 g of carbon monoxide are placed in an 8.00 liter container and heated to 900 K. If the value of K_c for the reaction at 900 K is 1.56, what are the equilibrium ... 
Chemistry
At a high temperature, the equilibrium constant for the decomposition of hydrogen iodide is 65.0. If the initial concentration of HI is 1.60 M, what is the concentration of hydrogen at equilibrium? 2Hl(g) H2(g) + I2(g) A. 1.42 M B. 0.753 M C. 0.240 M D. 0.802 M I think that ... 
Science
The maximum number of electrons in the second energy level of an atom is ____. two four eight ten The number of _____ is equal to the atomic number. protons neutrons electrons both a and c 
Intermediate Algebra
One leg of a right triangle has a length of 5 m. The other sides have lengths that are consecutive integers. Find these lengths. The other leg is ____ m The length of the hypotenuse is ____ m 
mathword problem
In 1992, the life expectancy of males in a certain country was 73.5 years. In 1996, it was 75.7 years. Let E representthe life expectancy in yeart and let t represent number of years since 1992. Fill in the linear function E(t) that fits the data E(t)=____t+____ uses this to ... 
College Chemistry
Zinc, copper, lead, and mercury ions are toxic to Atlantic salmon at concentrations of 6.42 times 10 to the 2 mM, 7.16 times 10 to the 3 mM, 0.965 mM, and 5.00 times 10 to the 2 mM, respectively. What are the corresponding concentration is milligrams per liter? A. ... 
Chemisty
For the reaction: 2NO(g) + H2(g) <=> N2O(g) + H2O(g) + energy Write the equilibrium constant expression for the reaction. This reaction takes place at 25°C. At this temperature the concentration of NO is found to be 1.75 mol/L, the concentration of H2 is 3.00 mol/L, the... 
Chemisty
For the reaction: 2NO(g) + H2(g) <=> N2O(g) + H2O(g) + energy Write the equilibrium constant expression for the reaction. This reaction takes place at 25°C. At this temperature the concentration of NO is found to be 1.75 mol/L, the concentration of H2 is 3.00 mol/L, the... 
Science
For the reaction: 2NO(g) + H2(g) <=> N2O(g) + H2O(g) + energy Write the equilibrium constant expression for the reaction. This reaction takes place at 25°C. At this temperature the concentration of NO is found to be 1.75 mol/L, the concentration of H2 is 3.00 mol/L, the... 
Chemistry
1. In an equilibrium, A + B > C + D; "A" & "B" are mixed in a vessel at temperature "T". The initial concentration of "A" was twice the initial concentration of "B", & after the equilibrium has reached, concentration of "C" was twice the equilibrium concentration of "B... 
Calculus
Evaluate the following limits. lim as x approaches infinity 6/e^x + 7=____? lim as x approaches negative infinity 6/e^x+7=____? 
Physiology
1. Atp synthase is an enzyme in the. C A. NUCLEUS B. CELL MEMBRANE C. MITOCHONDRIAL MEMBRANE D. MITOCHONDRIAL MATRIX 2. Each condon on a(n) ____ molecule encodes for ___ amino acids. B A. mRNA...one B. mRNA....three C. tRNA...three D. tRNA...one 3. Two molecules of ____ are ... 
chemistry
23) The equilibrium constant for the gas phase reaction 2NH3 (g) <> N2 (g) + 3H2 (g) is Keq = 230 at 300 °C. At equilibrium, __________. A) reactants predominate B) products predominate C) only products are present D) roughly equal amounts of products and reactants are... 
Chemistry
The Kc for the following reaction at 940oC is 1.38. Given the concentrations [CO2] = 0.500 M, [H2] = 0.425 M, [CO] = 0.610 M and [H2O] = 0.695 M, one can conclude that: H2(g) + CO2(g) ↔ CO(g) + H2O(g) Question 8 options: A) the system is not at equilibrium and the ... 
Chemistry (Equilibrium)
At high temperature, 0.500 mol of HBR was placed in a 1.00L container where it decomposed to give the equilibrium: 2HBr <==> H2 + Br2 At equilibrium, the [Br2] is 0.0855 mol/L. What is the value of the equilibrium constant? My work: ..2HBr <==> H2 + Br2 I 0.500M... 
AP CHEMISTRY
For the reaction I2(g) + Br2(g) 2 IBr(g), Kc = 280. at 150.°C. Suppose that 0.590 mol IBr in a 2.50L flask is allowed to reach equilibrium at 150.°C. What are the equilibrium concentrations of IBr, I2, and Br2? 
chem
For the reaction I2(g) + Br2(g) 2 IBr(g), Kc = 280. at 150.°C. Suppose that 0.570 mol IBr in a 2.50L flask is allowed to reach equilibrium at 150.°C. What are the equilibrium concentrations of IBr, I2, and Br2? 
math
factor down (4^3)^2 ____ * _____ ______ _______ ______*______ _____ ____ when is it not possible to work an exponent multipication? In the space below give an example and work it out to prove what you say does not work 
Physiology
1. Two molecules of ____ are produced by glycolysis. Each molecule has ____ carbons. C A. Oxaloacetate...4 B. Citrate...3 C. Pyruvate...3 D. Acetate...4 2. Oxaloacetate combines with acetyl coA at the beginning of. D A. Electron transport chain B. Glycolysis C. Transcription D... 
Chem
Zinc, copper, lead, and mercury ions are toxic to Atlantic salmon at concentrations of 6.42 times 10 to the 2 mM, 7.16 times 10 to the 3 mM, 0.965 mM, and 5.00 times 10 to the 2 mM, respectively. What are the corresponding concentration is milligrams per liter? A. ... 
Chemistry
You want to make 1000 ml of an 0.1 M HA buffer so that the pH=pKa of HA. To make this buffer you need to add ____ HA and ____ mL of 1M NaOH and then add enough water to give 1000 mL. HA is a weak acid. 
Spanish
1. Clara ____ de Paraguay. a. soy b. es*** c. está d. estamos 2. ¿___ tú en Asunción? a. estás b. eres c. sois d. están*** 3. Nosotros ____ altos. a. son b. estamos c. somos*** d. estáis 4. Ellos _____ cansados. a. están*** b. son c. estáisy d. eres 
College Chemistry 2  Equilibrium Constants/Conc.
The equilibrium constant for the reaction is 37 at a certain temperature. 2H2(g) + CO(g)<==> CH3OH(g) If there are .0293 moles of H2 and .00353 moles of CH3OH at equilibrium in a 4.53L flask, what is the concentration of CO? .....So far I have found: H2= .0293/4.53= .... 
chemistry
What are the equilibrium concentrations of H+,OH ,(HSO3), (SO3)2 and Na+ in the solution that results from combining 50.0 mL of 0.200 M NaHSO3 with 50.0 mL of 0.600 M Ba(OH)2 ? Ka1 = 1.5 x 105 and Ka2 = 1.0 x 107 for H2SO3 does it matter that Ba(OH)2 has 2 OH's?When ... 
chemistry
The equilibrium concentration of NOCl = {0.0610}, NO = [0.0151, and Cl= [0.0142, what is the value of the equilibrium constant? Don't really get how to figure this out..anyone know? Thanks!! 
algebra
3. write the function whose graph is the graph of y=sqrt of x, but is shifted to the left 3 units y=____ 4. write the function whose graph is the graph of y=x, but is shifted down 8 units y=___ 5. write the function whose graph is the graph is the graph of y=(x+4)^2, but is ... 
Chemistry
DrBobb22 Calcule the concentrations of Cd^+2 , [Cd(CN)4^2] and CN^ at equilibrium, when 0.42 moles of Cd(NO3)2 dissolves in 1 L of 2.50 M NaCN Kf for Cd(CN)4^2 Help! 
Physics
I am to fill in the blanks without a word bank, my answers are in brackets. 1. When light waves reflect from media in which the speed of light is slower, their phase (crest or trough) is ____ 2. The trick to being able to observe interference patterns for light waves in to ... 
chemistry
In a certain trial, the initial concentrations of Fe3+ and SCN are both 1.00x10^3 M and the initial concentration of FeSCN2+ is zero. Suppose that after the reation reaches equilibrium, the concentration of FeSCN2+ was found to be 1.19x10^4 M. Use this information to ... 
Chemistry
Which of the following statements are incorrect? 1) Gases are not included in the equilibrium constant expression. 2) Equilibrium constant can be increased by adding a catalyst 3) Large equilibrium constant favors reactants 4) Equilibrium is typically achieved in a very short ... 
science(chem)
For MassBalance eqzns, in my text it is described as "relating the equillibrium concentrations of various species in a solution to one another and to the analytical concentrations of the various solutes. Is the analytical concentration described, the molar concentration?? yes... 
Calculus
The position of a particle moving along the xaxis is given by s(t)=2t2+4. Use difference quotients to find the velocity v(t) and acceleration a(t), filling in the following expressions as you do so: v(t)=limh>0 [_____ / h ] = ____ a(t)=limh>0 [ ____ / h ] = _____ ok ... 
chemistry
The question below, i was wondering if it decrease because the N2 is on the right and so to add to left it would be too much so it gets rid of it by decreases and doing to the right? because the left side is (+) endothermic? sorry im a little confused. if the number was ... 
math
108 ,36,12,4 ___ ,____find next two numbers 12,24 ,48,96 ____, ___ find the next two numbers 1 ,1,2,3 ____, ____ find the next two numbers 
Math
w^2 ____ w^0 or w^2/w0 Simplify. Answer as a power with a positive exponent 
chem
PCL5=PCl3+Cl2 a. Initially 0.72 mole PCl5 are placed in 1.50 L flask. At equilibrium, there is 0.16 mole PCl3 in the flask. What is the equilibrium concentration of the PCl5? b. What is the equilibrium concentration of the Cl2? c.What is the equilibrium constant for the reaction? 
Chemistry Honors
A 0.25 mol sample of n204 dissociates and comes to equilibrium in a 1.5 L flask at 100 degrees C. The reaction is N2O4 > 2 NO2. The Kc at 100 degrees C is 0.36. What are the equilibrium concentrations of NO2 and N2O4? 
Science (Chemistry)
A chemical system within a sealed 1 L reaction vessel is described by the following reversible reaction equation: 2H2S(g) <> 2H(g) + S2(g) If the equilibrium constant is 0.000 004 200 at 1103 K find: (a) the reaction quotient intially (b) the order of concentration of... 
Science
The effect _______ explains how fast air moves across a surface, the ____ pressure that presses on that surface. In contrast, the more ____ that air moves, the more of _____ there will be. I'm sorry that it might not make sense, I translated it from French. I tried using ... 
Chemistry 30
A mixture of 2.5 moles of H2O and 100 g of C are placed in a 50.0 L container and allowed to come to equilibrium in the following reaction: C(s) + H2O(g) CO(g) + H2(g) The equilibrium concentration of hydrogen gas is found to be 0.040 M. What is the ... 
Chem
A mixture of 2.5 moles of H2O and 100 g of C are placed in a 50.0 L container and allowed to come to equilibrium in the following reaction: C(s) + H2O(g) CO(g) + H2(g) The equilibrium concentration of hydrogen gas is found to be 0.040 M. What is the ...