1. Chemistry

    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.
  2. Math - Magic Square???

    My daughter is in 2nd grade and has a worksheet called Magic 26. It wants her to use the numbers 1 -12. Each row, column, and diagonal must equal 26. The four corners and four center numbers must equal 26 too. (example of puzzle below) Please help solve. THANKS!!!!! {____}...
  3. math

    Write the first six terms of each of the sequences whose nth term is a)(-3)n { ____, ____, ____, ____ , ____, ____ } b)3 – 4n { ____, ____, ____, ____ , ____, ____ }
  4. Chemistry

    X2 + Y2 <=> 2XY 0.50 mole each of X2 and Y2 are placed in a 1.0 litre vessel and allowed to reach equilibrium at a given temperature. The equilibrium concentrations of XY is found to be 0.025 mol/L. What is the equilibrium cosntant for this reaction? Do I just get the ...
  5. Calculus

    Match the rule with the title: ____ 3. d/dx [f(x)/g(x) ]=(g(x) f^' (x)-f(x) g^' (x))/[g(x)]^2 ____ 4. d/dx [f(g(x))]=f^' (g(x))∙g'(x) ____ 5. d/dx [f(x)∙g(x)]= f(x) g^' (x)+g(x) f^' (x) ____ 6.d/dx [x]=1 ____ 7. d/dx [f(x)+g(x)]= f^' (x)+g^' (x) or d/dx [f(x)+g(x...
  6. chemistry

    For the reaction H2(g) + I2(g) ↔ 2 HI(g), you have the initial concentrations [H2] = 0.15 and [I2] = 0.05. Keq for the reaction at this temperature is 4.5 x 10-6. Make a reaction table. Include rows for initial concentration, change in concentration, and equilibrium ...
  7. chemistry

    For the reaction H2(g) + I2(g) ↔ 2 HI(g), you have the initial concentrations [H2] = 0.15 and [I2] = 0.05. Keq for the reaction at this temperature is 4.5 x 10-6. Make a reaction table. Include rows for initial concentration, change in concentration, and equilibrium ...
  8. chemistry

    For the reaction H2(g) + I2(g) ¡ê 2 HI(g), you have the initial concentrations [H2] = 0.15 and [I2] = 0.05. Keq for the reaction at this temperature is 4.5 x 10-6. Make a reaction table. Include rows for initial concentration, change in concentration, and equilibrium ...
  9. Chemistry

    Consider the equilibrium 2NOCl (g) <---> 2NO (g) + Cl2 (g). In a 1 L container @ equilibrium there are 1.0 mol NOCL, 0.70 mol NO, and 0.40 mol Cl2. @ constant temperature and volume, 0.10 mol NaCl is added. What are the concentrations in the "new" equilibrium in ...
  10. Chemistry

    The equilibrium constant, Keq, is defined as the ratio of the concentrations of products to reactants. What is the equilibrium constant for the following reaction: ClNO2 (g) + NO (g) ↔ NO2 (g) + ClNO (g)
  11. CHEMISTRY

    A chemist studying the equilibrium N2O4(g)<----->2NO2(g) controls the temperature so that keq ( equilibrium constant)= 0.028. At one equilibrium position, the concentration of N2O4 is 1.5 times greater than the concentration of NO2. Find the concentrations of the two ...
  12. Spanish 2

    I am writing things that I do on the ship. Choose the correct verb (based on its meaning) to complete each sentence. A. Taco B. Nado C. Almuerzo D. Juego E. Escucho F. Miro. G. Abro H. Hablo I. Voy J. Como 1. ____ la musica. 2. ____ en la comedor. 3. ____ la puerta con la ...
  13. Grammar

    Fill in the sentences with adverbs. Do not repeat. 1.______ my friend and I _____ went _____. 2.We had _______ wanted to go ____, so we went _____ ______ and ____. 3. When we arrived _____, it was ____ dark, so we ____ went _____. 4. ____, we were ____ and ____ by what we saw...
  14. chm

    The equilibrium constant for the equation 2 H2(g) + CO(g) CH3OH(g) Is 19 at a certain temperature. If there are 3.11 x 10-2 moles of H2 and 5.79 x 10-3 moles of CH3OH at equilibrium in a 6.75 L flask. What is the concentration of CO? At 1280 °C the equilibrium constant for ...
  15. science

    Words to use: Accelerate - Sliding - Brake - Friction - Slipping - Inertia Velocity - Wheel - Strength - Static - Terminal velocity Questions 1. An object will ____?____ when the net force is not zero. 2. ____?____ will never speed up an object. 3. The friction that prevents ...
  16. chem

    What is constant about the equilibrium constant? A. The reversibility of the reaction at equilibrium is constant. B. The ratio of products to reactants at equilibrium is constant. C. The concentrations of products present at equilibrium are constant. D. The concentrations of ...
  17. Fractions of Money b.

    Answer these questions: 1. What is s third of £18? 2. What is two thirds of £33? 3. What is three quarters of £42? 4 What is a quarter of £42? 5. What is a third of £42? Complete these statements: 6. ____ is a third of ____ 7. ____ is two thirds of ____ 8. ____ is three ...
  18. math

    7. ____ is two thirds of ____ 8. ____ is three quarters of ____ 9. ____ is a quarter of ____ 10. ____ is a third of ____
  19. US History

    Put this in order ____ Constitutional Convention ____ Northwest Ordinance ____ Shays' Rebellion ____ Articles of Confederation ____ American Revolution end Please help
  20. Finding The Missing Percent/Math

    1) ____ of 50% = 45.5 2) ____ of 3 = 1.8 3) 56% of ____ = 3.92 4)69% of 30 = ____ 5)29% of ____ = 26.1 6) ____ of 20 = 6.2 7)82% of 10 = ____
  21. Roman Numerals

    23 _____ XXIII 44 ____ XLIV 52 ____ LII 17 ____ XVII 68 ____ LXVIII 99 XCIX 1,111 MCXI 575 DLXXV 946 ____ CMXLVI
  22. Chemistry

    Consider this equilibrium process at 686°C. CO2(g) + H2(g) CO(g) + H2O(g) The equilibrium concentrations of the reacting species are [CO] = 0.050 M, [H2] = 0.045 M, [CO2] = 0.086 M, and [H2O] = 0.040 M. (a) Calculate Kc for the reaction at 686°C. (b) If the concentration of ...
  23. chem

    For the equilibrium reaction: CO(g)+H2O(g)<=>CO2(g)+H2(g) the Keq value at 690°C is 10.0. A mixture of 0.300 mol of CO, 0.300 mol of H2O, 0.500 mol of CO2 and 0.500 mol of H2 is placed in a 1.0 L flask. a)Write the Keq expression for this reaction and use the ...
  24. CHEM

    For the equilibrium reaction Co(g)+H2O(g)<=>CO2(g)+H2(g) the Keq value at 690°C is 10.0. A mixture of 0.300 mol of CO, 0.300 mol of H2O, 0.500 mol of CO2 and 0.500 mol of H2 is placed in a 1.0 L flask. a) Write the Keq expression for this reaction and use the ...
  25. chemistry

    Consider the equilibrium, A + B <--> C, with K=32.217 and initial concentrations of A,B, and C, of 3.665M, 0.883M, and 3.925M, respectively. What is the equilibrium concentration of B 3.665 0.883 3.925 A + B = C Keq=(C)/(A)*(B)= 32.217 Q = (3.025)/(3.665)*(0.883)=1.21 Q...
  26. Please Help Anyone! :]

    ____ kg = 440 g ((Help Please)) ____ kg 1,006,000 ((Help Please)) 8.6 kg = ____ g ((8600/0.0086??)) 800 g = ____ mg ((800.000??)) 1.7 kg = ____ ((1700/0.0017??)) ____ mg = 6.2 kg ((Help please)) (((((I understand it it's just I can't get a correct answer again.Can someone help...
  27. spanish

    Usa la forma presente de ESTAR con el participio pasado del verbo entre paréntesis para completar cada oración. Are these answers correct? 1. La maleta ya _____1.)____ ______2.)_______. (abrir) 1.) está 2.) 2.) abierto 2. ¿ ___(1)___ ___(2)___ todos estos regalos? (...
  28. chem

    a.) At equilibrium, the molar concentrations for reactants and products are found to be [I2] = 0.50 M,[Cl2] = 0.60 M, and [ICl] = 5.0 M. What is the equilibrium constant (Kc) for this reaction? b.) The concentration of I2 is increased to 1.5 M, disrupting equilibrium. ...
  29. Science (Chemistry)

    4. A Beer’s Law plot was prepared for the reaction A(aq) + B(aq) AB(aq), plotting absorption over AB(aq) concentration. The linear equation for this plot was y = 78.3x. A solution was prepared by mixing 10.0mL of 0.100M A with 5.00mL of 0.100M B and adding enough ...
  30. Chemistry

    Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium concentration of SO2(g). 2SO2(g)+O2(g)=2SO3(g) Kc=1.7*10^8 [SO3]aq=0.0034 M [O2]aq=0.0018 M
  31. College Chemistry

    Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium concentration of SO2(g). 2SO2(g)+O2(g)=2SO3(g) Kc=1.7*10^8 [SO3]aq=0.0034 M [O2]aq=0.0018 M
  32. statistics

    A researcher used an analysis of variance to compare three treatment conditions with a separate sample of n = 8 participants in each treatment. The results of the analysis are shown in the following summary. Fill in all missing values in the table. (Hint: Start with the df ...
  33. spanish

    (Which indefinites correspond with the following words?) Please re-write the following nouns preceded by the correct indefenido. 6. ____ primos 7. ____ apartamentos 8. ____ idioma 9. ____ naciones
  34. chem

    Given the concentrations, calculate the equilibrium constant for this reaction: I2(g) + Cl2(g)---> 2ICl(g) At equilibrium, the molar concentrations for reactants and products are found to be I2 = 0.50M, Cl2 = 0.60M, and ICl = 5.0M. What is the equilibrium constant (Kc) for ...
  35. Algebra

    Arrange the digits 5, 6, 7, 8, and 9 in the blanks to maximize the product. ___ ____ ____ x ____ ____
  36. math

    Arrange the digits 5, 6, 7, 8, and 9 in the blanks to maximize the product. ___ ____ ____ x ____ ____
  37. Math

    Complete the table of values for the function y = 4(1^x/2)^x: x -3 -2 -1 0 1 2 3 y ___ ____ _____ ____ ____ ____ __
  38. Math Calculus

    f(x) = (x^3+5x^2-28x-32)/(x^3-18x^2+105x-196) which can be written as f(x) = [(x+1)(x-4)(x+8)]/[(x-7)^2(x-4) The domain of the function f(x), in interval notation from left to right, is ____ U ____ U ______. The root(s) of f(x), in increasing order, is/are: _____, ____. f(x) ...
  39. math

    . 3 gal = ____ qt. 22. 5 cups = ____ tsp 23. 15 lb = ____ kg 24. 150 ml = ____ Tbsp 25. 3 qt = ____ oz = _____ tsp
  40. Chemistry

    For the reaction NO2(g) + NO(g) = N2O3(g) If at particular temperature, K was 575 and equilibrium concentration of N2O3(g) was 2.5 M, calculate the equilibrium concentrations of NO2(g) and NO(g) if they both had the same initial concentrations. i have my table layed out like...
  41. equilibrium question

    For the reaction N2(g)+o2(g)<-->2NO(g), you have the initial concentration [N2]=0.03 and [O2]=0.08 Keq for the reaction at this temperature is 5.7*10^-5. What are the equilibrium concentrations for N2, O2, and NO? Please help me with this! http://www2.ucdsb.on.ca/tiss/...
  42. math

    Find the missing numbers to complete the patterns. Some are arithmetic and some are geometric. State the commom differences or common ratio. 1) 1,2,___,___,___,32 2)800,80,8,0,8,0.08,___,____ Some tricky ones that don't follow the "rules." 1)17,15,25,23,33,31,_____,____. 2)3,6...
  43. chemistry

    A reaction is represented by this equation: 2W( aq ) ⇌ X( aq ) + 2Y( aq ) K c = 5 × 10 −4 (a) Write the mathematical expression for the equilibrium constant. (b) Using concentrations of ≤1 M , make up two sets of concentrations that describe a mixture of W, ...
  44. chemistry

    A reaction is represented by this equation: 2W( aq ) ⇌ X( aq ) + 2Y( aq ) K c = 5 × 10 −4 (a) Write the mathematical expression for the equilibrium constant. (b) Using concentrations of ≤1 M , make up two sets of concentrations that describe a mixture of W, ...
  45. math

    8. ____ is three quarters of ____ 9. ____ is a quarter of ____ 10. ____ is a third of ____
  46. Chemsitry

    For the following equilibrium process: CO2 + H2 = CO + H2O The equilibrium concentrations of reacting species are: [CO]= .050 M; [H2]= .045 M; [CO2]= .086 M; [H2O]= .040 M. (a) Calculate Kc for the reaction (b) If we add CO2 to increase its concentration to 0.50 mol/L, what ...
  47. Chemistry

    The following system is at equilibrium,at 699K in a 5L container. H2(g)+I2(g)--->2HI(g) Kc = 54.9 Initially,the system had 2.50 moles of HI.What is the moles of H2 at equilibrium? Can Dr.Bob check if my steps are correct? My solution: Initially,the concentrations of H2 & I2...
  48. geometry

    Answer the following questions to determine why Euler’s formula continues to hold for the polyhedron formed by cutting corners off of an octahedron, as in Figure 11.35(b): a. For an octahedron V = , ____,F = ____, and E = _____. b. When you slice off one corner of the ...
  49. Math

    Find the formula for piecewise function f(x) = ____ if x < or equal to -1 ____ if -1 < x < or equal to 2 ____ if x > 2 Thanks! I got -1, x, and 2. Am I right?
  50. math-PLEASE HELP

    Answer the following questions to determine why Euler’s formula continues to hold for the polyhedron formed by cutting corners off of an octahedron, : a. For an octahedron V = , ____,F = ____, and E = _____. b. When you slice off one corner of the octahedron, you (gain or ...
  51. 3rd grade math

    write the missing fraction or mixed number for each number line 0,1/3,2/3,1,____,____,____,______,2 1/3 3
  52. "le Chat. principle".

    Hey, can you check this, this is regarding "le Chat. principle". Thanks! #1) The value of the equilibrium constant for the reaction H2CO3(aq) + energy >>> H2O(l) + CO2(g) can be changed by introducing a change to which component of the equation? My answer: It would ...
  53. Chemistry

    For the reaction: H2(g) + I2(g) 2HI(g) , Kc = 12.3 at some temperature T. If [H2] = [I2] = [HI] = 3.21 x 10-3 M at this temperature, which one of the following statements is true? 1. ) Not enough information is given to answer the question. 2. ) The concentration of HI will ...
  54. Chemistry

    For the reaction below at a certain temperature, it is found that the equilibrium concentrations in a 5.00 L rigid container are [H2] = 0.0500 M, [F2] = 0.0100 M, and [HF] = 0.400 M. If 0.340 mol of F2 is added to this equilibrium mixture, calculate the concentrations of all ...
  55. Chemistry

    For the following reaction at a certain temperature: 2( ) 2( ) ( ) 2 H F HF g g g +  it is found that the equilibrium concentrations in a 5.00 L rigid container are [H2]=0.0500 M, [F2]=0.0100 M, and [HF]=0.400 M. If 0.200 mol F2 is added to this equilibrium mixture, calculate...
  56. chemistry

    For the reaction below at a certain temperature, it is found that the equilibrium concentrations in a 4.87-L rigid container are [H2] = 0.0496 M [F2] = 0.0116 M [HF] = 0.429 M. H2(g) + F2(g) <==> 2 HF(g) If 0.185 mol of F2 is added to this equilibrium mixture, calculate ...
  57. chemistry

    For the following reaction at a certain temperature, it is found that the equilibrium concentrations in a 5.00 L rigid container are [H2] = 0.0500 M, [F2] = 0.0100 M, and [HF] = 0.400 M. If 0.261 mol of F2 is added to this equilibrium mixture, calculate the concentrations of ...
  58. pigskin geography

    name the states that the Chargers will fly over in route to their game in Jacksonville, ____,_____,_____,_____,____,_____,____, ____,____.
  59. Chemistry(Please check)

    I completed a lab to find the determination of Kc. I have to find the concentrations of reactants at equilibrium using an ICE table. The equation that were are using is Fe^3+(aq) + SCN^-(aq) -> Fe(SCN)^2+(aq) I have to create 5 ICE tables because we used 5 different test ...
  60. Chemistry

    A 2.00L flask was filled with 4.00 mol of HI at a certain temperature and given sufficient time to react. At equilibrium the concentration of H2 was 0.400 M. Find the equilibrium concentrations of I2 and HI and then find the Keq at this temperature 2HI(g) <-> H2(g) + I2(g)
  61. chemistry(please check)

    Just made it a new post didn't what it to get overcrowning.I hope this will help us figure out now For questions #1 through #10, refer to the following equilibrium system, with a Kc of 1.23E-03: C3H6O (aq) + 2C2H6O(aq)----> C7H16O2 (aq) + 2H2O (l) 1. What is the equilibrium...
  62. Chemistry(Urgent, please check)

    I completed a lab to find the determination of Kc. I have to find the concentrations of reactants at equilibrium using an ICE table. The equation that were are using is Fe^3+(aq) + SCN^-(aq) -> Fe(SCN)^2+(aq) I have to create 5 ICE tables because we used 5 different test ...
  63. Chemistry

    C(s) + H20(g)↔ CO(s) + H2(s) the equilibrium constant for this reaction is 4.251 x 10^-2 at 800 K. if the equilibrium concentration of H2O(g)is 0.1990 M, what are the concentrations of CO, H2, and C?
  64. Chemistry

    C(s) + H20(g)↔ CO(s) + H2(s) the equilibrium constant for this reaction is 4.251 x 10^-2 at 800 K. if the equilibrium concentration of H2O(g)is 0.1990 M, what are the concentrations of CO, H2, and C?
  65. Chemistry(Please check, thank you!)

    I completed a lab to find the determination of Kc. I have to find the concentrations of reactants at equilibrium using an ICE table. The equation that were are using is Fe^3+(aq) + SCN^-(aq) -> Fe(SCN)^2+(aq) I have to create 5 ICE tables because we used 5 different test ...
  66. Chemistry

    A substance (CD) decomposes into C and D At the temperature of the experiment, 15.0% of CD is decomposed when equilibrium is established. a) if the initial concentration of CD is 0.200mol/L, what are the equilibrium concentrations of CD, C and D? I got 0.17 for CD and I got 0....
  67. chemistry

    I have gotten the equilibrium concentrations of N202 to be 2M and N02 to be 2M also. After equilibirum is reached, a pistons is used to decrease the flask volume to 3L. Once equilibrium is established find the concentration and moles of each gas. K = 2 How would I set up my ...
  68. Spanish 1

    A spanish exchange student is trying to figure out what his friends like to eat. Provide the correct pronoun forms to complete his sentences below.: ____ gusta la comida china. A Patricia y a Juan ____ gusta la comida mexicana. ¿A vosotros ____ gusta la comida italian? A ...
  69. Chemistry

    Consider the equilibrium 2NO (g) <---> 2NO (g) + Cl2 (g). In a 1 L container @ equilibrium there are 1.0 mol NOCL, 0.70 mol NO, and 0.40 mol Cl2. @ constant temperature and volume, 0.10 mol NaCl is added. What are the concentrations in the "new" equilibrium in comparison...
  70. chemistry

    Chloroacetic acid has a relatively large equilibrium constant, so at low acid concentrations it is necessary to use the quadratic equation in order to calculate the concentrations of the aqueous species. Ka for ClCH2COOH is 1.4 ´ 10-3. For the problems that follow, consider ...
  71. Science

    The following reaction: 2SO3 (g) ! 2SO2 (g) + O2 (g) has an equilibrium constant equal to 0.23 M. If the following concentrations are present: [SO2] =0.480 M, [O2] = 0.561 M, [SO3] = 0.220 M, is the reaction at equilibrium? If not, which way must it shift to reach equilibrium?
  72. Chemistry

    The equilibrium constant is equal to 5.00 at 1300K for the reaction 2SO2(g) + O2(g) <--> 2SO3(g) if initial concentrations are [SO2] = 6.00M, [O2] = 0.45M, [SO3]= 9.00M, the system is a/. At equilibrium b/. Not at equilibrium and will remain in an un equilibrated state c...
  73. PHYSICS HELP

    Draw an arrow in the box that shows the direction of the force. Please help. I want to be sure. W > 0 W = 0 W < 0 ___ ____ ____ ___ ____ ____ d-> d-> d->
  74. AP Chemistry

    Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of the ...
  75. Chemistry

    At room temperature, 80.0 ml of 0.125 M AgNO3(aq) and 20.0 ml of 0.500 M Fe(NO3)2(aq) are mixed together, generating the following equilibrium system Ag+ (aq) + Fe2+(aq) Ag(s) + Fe3+(aq). At equilibrium, the concentration of Fe3+ is 0.00505 M. (a) (4 pts) Calculate the initial...
  76. science 3

    11. The freezing point of a substance is ____ the melting point of the same substance. (1 point)greater than less than equal to unrelated to 12. For most substances, the distance between particles is smallest when the substance ____. (1 point)exists as a gas exists as a liquid...
  77. English

    Are the pronouns I put down right? My answers are the ones in parentheses 1. The trip led to an argument between Helen and _____. (I) 2. It was ____ who demanded an apology from the newspaper. (us) 3. We appreciated ____ writing a personal letter to explain his stand on the ...
  78. chemistry

    200g of HOCl is placed inside a 3L container and allowed to reach equilibrium. Find the equilibrium concentrations for all species. Given: 2HOCL (g) <--> H20 (g) + Cl20 (g) when Delta H = +56 kJ and Keq = 11.11 at 25 C
  79. SPANISH!!!! articles and all that good stuff HELP!

    ¿Cuales artículos corresponden con las siguientes palabras? (Which articles correspond with the following words? Watch out for gender exceptions. Please re-write the following nouns preceded by the correct article. 1. ____ perro 2. ____ ventanas 3. ____ dogmas 4. ____ ...
  80. Chemistry

    At 2000°C the equilibrium constant for the reaction is Kc = 2.4 ✕ 103. 2 NO(g) equilibrium reaction arrow N2(g) + O2(g) If the initial concentration of NO is 0.160 M, what are the equilibrium concentrations of NO, N2, and O2? I do not even know how to ...
  81. Intergration: Measurement (Math)

    I don't get it. I need to find out these conversions. 15,000 g= ____ kg 5,000 mL= ____ L 75 mL= ____ L 390 mL= ____ L 0.03 m= ____ mm 6 m= _____ mm 2.48 L= ______ mL 43.2 L= ______ mL 807 mL= _____ L 3,751 m= _____ km
  82. chemistry

    please help and explain. At a certain temperature, Keq = 10.5 for the equilibrium below. CO(g) + 2 H2(g) equilibrium reaction arrow CH3OH(g) Calculate the following concentrations. (b) [H2] in an equilibrium mixture containing 1.01 mol/L CO and 0.335 mol/L CH3OH
  83. chemistry

    At a certain temperature, Keq is 4.13 x 10^-5 for the equilibrium: 2IBr(g) ↔ I2(g) + Br2(g) Assume that the equilibrium is established at the above temperature by adding only the reactant to the reaction flask. What are the concentrations of I2 and Br2 in equilibrium ...
  84. Chemistry

    Consider the reaction A+B->C+3D. A solution was prepared by mixing 50 ml of .001 M of A, 100 ml of .002 M of B, 10 ml of 1 M of C, and 75 ml of .0015 M of D. At equilibrium, the concentration of D was measured and found to be .0006 M. Calculate the equilibrium ...
  85. chemistry calculations

    At 25 deg C, Kc is 5.84x10-3 for the dissociation of dinitrogen tetraoxide to nitrogen dioxide. N2O4(g) ==== 2NO2(g) a) Calculate the equilibrium concentration of both gases when 4.00 grams of N2O4 is placed at 2.00-liter flask at 25 deg C. b) What will be the new equilibrium ...
  86. Linear equations

    I am not good at equations I need to complete this chart for this problem... y=-1/2x-4 X y (x,Y) __ -1 ____ -2 __ ____ __ -4 ____ 2 ___ ____ 8 ___ ____ I tried the first problem but I do not think it is correct.. y=-1/2x-4 x=-1 y=-1/2(-1)-4 = -3 1/2 that doesn't seem right can...
  87. Physics

    A race car starts from rest on a circular track of radius 507 m. The car's speed increases at the constant rate of 0.790 m/s2. At the point where the magnitudes of the centripetal and tangential accelerations are equal, find the following. (a) the speed of the race car ____ m/...
  88. Chemistry

    Consider the following reaction: CO(g)+2H2(g)⇌CH3OH(g) This reaction is carried out at a specific temperature with initial concentrations of [CO] = 0.27 M and [H2] = 0.49 M. At equilibrium, the concentration of CH3OH is 0.11 M. Find the equilibrium constant at this ...
  89. Chemistry

    Determination of the solubility product of PbI2. From the experimental data we obtain [I-] directly. To obtain Ksp for PbI2, we must calculate [Pb2+] in each equilibrium system. This is most easily done by constructing an equilibrium table. We first find the initial amount of ...
  90. Algebra help needed!

    x ^2 + 6x + 9 (x ^2 - 3x) _____________ __________ x (x ^2 - 9) possible answers are 1 ___ x -3 x-3 x + 3 1 ____ x + 3 so far i got 3x(3X-4)/X^3-9....then facotor the denominator...after that cancel out the like terms.. Simplify I am using parenthesis to separate , if i write ...
  91. Chemistry

    Recall that all aqueoous solutions contain_____. Water can also undergo ____. This process is called the ______of water. The reaction can be written as: Notice the double arrow in the reaction. This indicates that the reaction is_____. However, only a tiny fraction of water ...
  92. Chemistry12

    For the reaction NO2 + NO = N2O3 If at a particular temperature, K was 575 and the equilibrium concentration of N2O3 was 2.5M, calculate the equilibrium concentrations of NO2 and NO if they both had the same initial concentrations. I have this information in a table but i only...
  93. CHEMISTRY

    Find the equilibrium constant. 1. The equilibrium constant for the reaction,! Fe3+ + SCN- ⇋ FeSCN2+ (at a specific temperature), can be determined by first preparing a standard solution of FeSCN2+ and comparing its absorbance of light to an equilibrium system of unknown ...
  94. Science

    A chemist is studying the following equilibrium: 2Pb(NO3)2 (s) ! 2PbO (s) + 4NO2 (g) + O2 (g) He starts out with 10 g of Pb(NO3)2 and, at equilibrium, has 2.02 g of PbO. The concentrations of NO2 and O2 at equilibrium are 0.25 M and 0.019 M, respectively. What is the value of ...
  95. AP Chemistry

    At 350 K, Kc= 0.142 for the reaction 2BrCl(g)<-> Br2(g) + Cl2(g) An equilibrium mixture at this temperature contains equal concentrations of bromine and chlorine, 0.049 mol/L. What is the equilibrium concentration of BrCl? Answer in units of M
  96. Equilibrium

    An aqueous solution of carbonic acid reacts to reach equilibrium as described below. H2CO3(aq) + H2O(l) <---> HCO3^-(aq) + H3O^+(aq) The solution contains the following solute concentrations: Carbonic Acid: 3.3*10^-2 mol/L HCO3^-: 1.19*10^-4 mol/L H3O^+: 1.19*10^-4 mol/L...
  97. Chemistry, equilibrium molarity

    At a particular temperature, K=3.75 for the following reaction. SO2(g) + NO2(g) (reversible arrows) SO3(g) + NO(g) If all four gases had initial concentrations of 0.500 M, calculate the equilibrium concentrations of the gases. This is what I've done so far: (.5+x)2/(.5-x)2=3....
  98. chemistry

    Determine the concentration at equilibrium if you start with 2.3 grams of Hydrogen and 200grams of Iodine in a 2.3 liter container. If you now add an extra .25M of HI after equilibrium, calculate Qc. Recalculate now what the concentrations should be at equilibrium. H2(g)+I2(g...
  99. Chemistry

    Find the equilibrium constant. 1. The equilibrium constant for the reaction,! Fe3+ + SCN- ⇋ FeSCN2+ (at a specific temperature), can be determined by first preparing a standard solution of FeSCN2+ and comparing its absorbance of light to an equilibrium system of unknown ...
  100. Science

    No further energy can be removed from a substance when it is at ____ ____ Please help!
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