1. College chemistry

    What is the volume in milliliters of 0.1069 M Cr2O72- required to react with 252.4 mL of 0.08013 M Cl- according to the reaction below? 6 Cl-(aq) + Cr2O72-(aq) + 14 H+(aq) ® 3 Cl2(g) + 2 Cr3+(aq) + 7 H2O(l)
  2. Chemistry

    A beaker of nitric acid is neutralized with calcium hydroxide. Write a balanced molecular equation and a net ionic equation for his reaction
  3. Chemistry

    In the reaction 2H2S + 3O2 -> 2SO2 +2H2O, the oxidizing agent is 1.oxygen 2.water 3.sulfur dioxide 4.hydrogen sulfide oxygen?
  4. Chemistry

    At 10C zinc reacts with 2.0M sulphuric acid to produce 17 mL hydrogen gas in 20 s a) what is the rate of this reaction? b)What volume of hydrogen might be produced in 20 s at 30C?
  5. Chemistry

    For the reaction, calculate how many grams of the product form when 3.2 g of Na2O completely reacts. Assume that there is more than enough of the other reactant. Na2O(s)+H2O(l)→2NaOH(aq)
  6. CHEMISTRY

    Write a balanced ionic equation for the redox reaction in dilute acidic solution between trioxodate(v)anion (IO3) AND IODIDE ANION (I)
  7. Chemistry

    For the neutralization reaction involving HNO3 and Ca(OH)2, how many liters of 1.55 M HNO3 are needed to react with 45.8 mL of a 4.66 M Ca(OH)2 solution? 1. 0.137 L 2. 0.0343 L 3. 0.275 L 4. 1.32 L 5. 0.662 L 6. 0.330 L
  8. Chem pls!!!!!

    1) name one specific instance in which single displacement reactions can be useful. 2) zn + cucl --> cu + zncl2 in this reaction, a solid would be formed from the copper. what is the solid known as a ___________ please help me
  9. chemistry

    2-Methyl-2-propanol (tert-butanol) reacts to give 2-chloro-2-methylpropane (tertbutyl chloride) and 2-methyl-1-propene. The reaction mechanisms are:
  10. chemistry

    The system H2 (g) + 3N2 (g) = NH3 (s) is at equilibrium.Use Le Chatelier's principle to predict the direction in which the equilibrium will shift if the ammonia is withdrawn from the reaction chamber.
  11. Ap Chemistry

    Adding or taking away small amounts of water in a reaction that takes places in an aqueous solution ____________________ affect the overall concentration of water.
  12. chemistry

    How do I balance a redox reaction for NaI + H2SO4 = H2S + I2 + Na2SO4 + H2O? I don't understand how to balance the electron loss for Iodine.
  13. Chemistry

    Express the rate of the reaction 2C2H6 + 7O2 -> 4CO2 + 6H2O in terms of: a. Delta [C2H6] b. Delta [CO2] Show work please
  14. Chemistry

    Write the equation for the reaction of iron and oxygen. Label the oxidizing reagent, the reducing agent, the reduced element, and the oxidized element.
  15. chemistry

    A 2.760 g sample of carbon was burned, yielding 10.120g of carbon dioxide. How many grams of oxygen was taken up by the reaction? What ofrmula would I use to solve this problem?
  16. Chemistry

    For the reaction, calculate how many grams of the product form when 3.2 g of CaO completely reacts. Assume that there is more than enough of the other reactant. CaO(s)+CO2(g)→CaCO3(s)
  17. chemistry

    How many g of H2 is formed from 2.4 g H20 according to the following reaction. 2H2O--->2H2O+O2 I believe the answer is .27g However, I can't understand how to work the problem completely out or one like it, if someone could please explain the formula it
  18. Intro Chem

    4Al(s) + 3O2(g)2Al2O3(s) Delta H reaction = -3351.4 kJ How much energy is transferred when 42.6 g of aluminum reacts to form aluminum oxide? Thanks
  19. Chemistry

    I'm having alot of trouble in chemistry. Currently were studying chemical equations and reactions. I would like to know if this is a single or double replacement reaction. 2Li + H2O ---> 2LiOH + H2
  20. chemistry

    How do I balance the following equation by the half-reaction method (it takes place in basic solution)? Fe(OH)2(s) + O2(g) = Fe(OH)3(s) the answer is 4Fe(OH)2(s) + 2H20(l) + O2(g) = 4Fe(OH)3(s) but how do I work it out?
  21. Chemistry

    Can diborane (B2H6) react with an alkene in a Hydroboration reaction or its BH3 the one that reacts so the splitting of diborane to borane has to be considered because I heard theyre the same?
  22. Chemistry

    When we test for carbon dioxide gas, we bubble it through limewater and get a white precipitate CaCO3. What is the equation for the reaction? Is it CO2 + Ca(OH)2 --> CaCO3 + H2O
  23. chemistry again

    calculate the normality of a solution prpared by dissolving 220.0 mg of K2Cr2O7 in 100 ml solution that will be used to oxidize ferrous chloride according to the unbalanced reaction.
  24. chemistry

    Write a molecular equation for the gas-evolution reaction that occurs when you mix aqueous hydrobromic acid and aqueous potassium sulfide.
  25. Chemistry

    Sodium + Sulfuric Acid and Phosphoric Acid + Magnesium Hydroxide a.write the formula b. supply the product c.type of reaction d. balancing
  26. Science HELP

    According to the law of conservation of mass, what should the product side of this single replacement reaction look like? Zn+2HCl--->? A. H2ZnCl2 B. H2+Zn+Cl2 C. H2+ZnCl2 D. ZnCl2 Is the answer D?
  27. CHEMISTRY

    if insulin has 6 cysteines, how many millimoles of IAA would be consumed in a blocking reaction containing 10 mmol of reduced insulin? mass of cysteine - 121 g/mol.
  28. Chemistry

    The reaction N2O4(g) -->2NO2(g) has Kc = 0.133 at 25 °C. What is the NO2 concentration in a 5.00 liter flask if it contains 0.250 mol of N2O4 at equilibrium I know I set something equal to Kc?
  29. Chem

    If 0.333 g Al is reacted with .501 g I2 according to the balanced chemical reaction: 2Al + 3I2 2AlI3 a) what is the limiting reagent b) how much excess reagent left over?
  30. social studies

    i did my project on the attack on pearl harbor and it says that i have to describe how my project relates to the theme "Revoultion,Reaction and Reform" i have no clue about this question. Please help?
  31. Chemistry

    Write and balance an equation for a reaction in which iron (Fe) and hydrochloric acid (HCL) reacto to form iron chloride (FeCl2) and hydrogen (H2)
  32. Inorganic chemistry

    Given the following two half-reactions, determine which overall reaction is spontaneous and calculate its standard cell potential. Cd^2+(aq) + 2e^- ==> Cd(s) E naught = -1.21V Sn^2+ + 2e^- ==Sn(s) E naught = -0.14V
  33. Chemistry - Help

    Please help..Write the equation for the equilibrium constant (K) of the reaction. 2K2CrO4 + 2HCl --><-- Cr2O7 + H2O + 2KCl (K2CrO4 is chromate) and (Cr2O7 is dichromate)
  34. chem

    How many grams of magnesium oxide are formed when 13.5 L of oxygen gas, measured at STP, completely reacts with magnesium metal according to the following reaction? i got .496 g but i know that like way off
  35. Chemistry

    For a lab, I had to react toulene with 1% I2 in dichloromethane. Would HI form as a result of this? Logically, I think there would be no reaction because toulene looks too stable. But a colour change occured. Why would this happen?
  36. chemistry

    Consider the reaction 2 Al2O3(s) → 4 Al(s) + 3 O2(g). ∆H = +3339.6 kJ/mol What is the change in heat when 0.455 L of a 3.60 M Al solution reacts with excess O2 ? 1. -21,962 kJ 2. -2735 kJ 3. -1368 kJ 4. -26,521 kJ 5. -685 kJ 6. -5477 kJ 7. -424 kJ 8.
  37. Chemistry

    In solution, hypochlorite ion is known to decompose with a second-order rate law. If [ClO-]0 = 0.0570 M and k = 2.06x10-4 M-1·min-1, calculate the half-life for this reaction 2ClO-  2Cl- + O2.
  38. Chemistry

    consider the following reaction: 2CH3OH(g) yields 2CH4(g) + O2(g) change in enthalpy= 252.8kJ How many kilojoules of heat are released when 38.4 g of CH_4 g) reacts completely with O2 (g) to form CH3OH (g) at constant pressure?
  39. Chemistry

    Calcultate the volume (in mL)of 0.250M silver nitrate solution required to react completely with a 5.00g piece of copper wire. (Assume the reaction runs at 100% yield.)
  40. chemistry

    how many milliliters of 0.250 M KMnO4 are needed to react with 3.55 grams of iron(II)sulfate, FeSO4? the reaction is as follows: 10FeSO4(aq)+2KMnO4(aq)+8H2SO4(aq)¨ 5Fe2(SO4)3(aq)+2MnSO4(aq)+K2SO4(aq)+8H2O(l)
  41. chemistry

    will the following solutions be acidic, neutral, or basic? Write the net ionic equation for any reaction that takes place. NH4Cl, KHCO3, LiClO4, NH4NO3, H2CO3, LiClO2, Ba(NO3)2
  42. Chemistry

    3C3H8 + 20H2CrO4-->9CO2 + 10 Cr2O3 + 32H2O What mass of chromium (III) oxide will be formed by complete reaction of 1.50g of propane with 35.0ml of 6.26M chromic acid?
  43. Chemistry

    the equation is TiCl4 + O2 (yields) TiO2 + 2Cl2. How much titanium(IV) chloride must react with excess oxygen to prepare 175 grams of the pigment? The reaction is found to be 85% efficient? (%yield)??
  44. ap chemistry

    We drop 37.4 grams of magnesium into 461 mL of a 3 M HCl solution. What is the maximum volume of dry hydrogen that could be produced by this reaction at STP? Mg(s) + 2HCl(aq) ! MgCl2(aq) + H2(g) Answer in units of liters
  45. chemistry

    Consider the reaction 2 Al2O3(s) → 4 Al(s) + 3 O2(g). ∆H = +3339.6 kJ/mol What is the change in heat when 0.455 L of a 3.60 M Al solution reacts with excess O2 ? 1. -21,962 kJ 2. -2735 kJ 3. -1368 kJ 4. -26,521 kJ 5. -685 kJ 6. -5477 kJ 7.
  46. Chemistry

    Consider the reaction: 2H2+2NO->N2+2H2O. Initially 1.20mol of H2 and 0.95 mol of NO are placed in a container(all reactants and products are gases). If after 5 seconds the amount of H2 has been reduced to 1.02mol then how much NO is left and how much N2
  47. AP Chemistry

    Consider the reaction 2 Al2O3(s) ! 4 Al(s) + 3 O2(g) . H = +3339.6 kJ/mol What is the change in heat when 0.455 L of a 3.60 M Al solution reacts with excess O2 ? 1. -424 kJ 2. -2735 kJ 3. -1695 kJ 4. -1368 kJ 5. -26,521 kJ 6. -21,962 kJ 7. -685 kJ 8.
  48. chem

    what is the percent yield of the reaction between 5.2 mL of 0.1233 M barium nitrate and 4.9 mL of 0.1256 sodium sulfate if 0.140 grams of the precipitate are produced? Formula?... BaNO3(aq) + Na2SO4(aq) --> Na2NO3(aq) + BaSO4(s)
  49. Science

    The law of conservation of _____ states that all particles must be equal before and after the reaction. word bank:elements, magnitude matter,mass,stress ,gradual chemical,physical ,weight.
  50. chemistry

    Determine the amount of heat (in kJ) given off when 2.07 multiplied by 104 g of ammonia are produced according to the following equation. Assume that the reaction takes place under standard-state conditions at 25.0°C. N2(g) + 3 H2(g) 2 NH3(g) ΔH°rxn
  51. Literature

    ---In reply to my last post about the key passages: OK, what if I say the theme is losing your childish innocence or something along those lines and I can support this by writing what Lizabeth says in the end of the story, when she sees Ms.Lottie's
  52. chemistry

    Suppose that 0.650mol of methane, CH4 (g), is reacted with 0.800mol 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?
  53. chem

    reaction order I know the form is r=k(A)a(B)b (a, b are exponents) and I know a and b depend on the concentration, but how do i know the number a and b. can you please explain in your own words instead of giving me websites because i look and i'm still
  54. physics

    Identify the action-reaction paris in the following situations: a) a person takes a step b) a snowball hits someone in the back c) a footbal player catches a ball d) a leaf falls to the ground HELP
  55. Health And Physical Education

    Identify a common defense mechanism that protects you from an uncomfortable? A.reaction formation B.abstinence C.mature behaviors D.acceptance I would like to know if anyone knew the answer and if so can you please tell me my parents are getting on to me
  56. chem

    Write a net ionic equation for the reaction that occurs when excess nitric acid (aq) and potassium sulfite (aq) are combined. Note: Sulfites follow the same solubility trends as sulfates.
  57. chem

    If .275 moles of ferrous ammonium sulfate and an excess of all other reagents are used in a synthesis of K3[Fe(C2O4)3]*3H2O, how many grams of product will be obtained if the reaction gives a 53% yield? Can you plz explain to me in steps
  58. Chemistry

    What volume of benzene (C6H6, d= 0.88 g/mL, molar mass = 78.11 g/mol) is required to produce 1.5 x 103 kJ of heat according to the following reaction? 2C6H6(l)+15O2(g)-->12CO2(G)+6H2O(g) :delta:Hrxn=-6278kj
  59. chemistry

    follows first-order kinetics and has an activation energy of 244 kJ mol-1. At 684 K, k = 0.00000508 s-1. What is the half-life (min) for this reaction at 427 °C ? Round your answer to 3 significant figures. I really don't know what to do
  60. chemistry

    480 g of FeS2 is combined with 12.000mol of molecular oxygen. balanced chemical reaction is 4FeS2 + 11O2 ---> 2Fe2O3 + 8SO2 a. Which cheical will run out first? b. What mass of Fe2O3is produced?
  61. AP Chem

    Consider the reaction 2 Al2O3(s) -> 4 Al(s) + 3 O2(g) . H = +3339.6 kJ/mol What is the change in heat when 0.455 L of a 3.60 M Al solution reacts with excess O2 ? 1. -685 kJ 2. -21,962 kJ 3. -1368 kJ 4. -2738 kJ 5. -5477 kJ 6. -26,521 kJ 7. -424 kJ 8.
  62. Global

    One way in which the Sepoy Mutiny in India, the Zulu resistance in southern Africa, and the Boxer Rebellion in China are similar is that each resulted from native reaction to foreign interference in the region, correct?
  63. science

    A reaction took place between a magnesium and florine in a large empty container if attraction and repulsive between these atom are equal at a distance of 0.001*10^-10m, calculate the couloumbic force between two atoms.
  64. chemistry

    Calcultate the volume (in mL)of 0.250M silver nitrate solution required to react completely with a 5.00g piece of copper wire. (Assume the reaction runs at 100% yield.)
  65. Chemistry

    The equation for respiration reaction is given by: C6H12O6 + 6O2 ------> 6CO2 + 6H2O + Energy Calculate the amount of water formed from oxidizing 18.0 grams of glucose in the presence of excess oxygen.
  66. Please help! Chemistry

    In a fume cupboard molten lead(ii) bromide is electrolysed using graphite electrodes. Write half-equations for the reaction at the (i).cathode (ii). Anode (iii). Overall equation (states required).
  67. CHEMISTRY

    1 mole of nitroglycerin decomposes and release 5.72*10^3 KJ heat. to give CO2 H2O O2 and N2. A) write the balanced chemical equation B) calculate the work done assuming the temp of the reaction is 450K
  68. Please help! Chemistry

    In a fume cupboard molten lead(ii) bromide is electrolysed using graphite electrodes. Write half-equations for the reaction at the (i).cathode (ii). Anode (iii). Overall equation (states required).
  69. Houston community college

    A projectile is fired from ground level with an initial velocity of 50m/s and an initial angle of 30degree. Assuming g= 9.8 m/s*2, find: (a) The projectile total time of flight. (b) The maximum height attained (c) The total horizontal traveled (d) The
  70. Physics

    A little red wagon with mass 7.0kg moves in a straight line on a frictionless horizontal surface. It has an initial speed of4.00 m/s and then is pushed 3.0m in the direction of the initial velocity by a force with a magnitude of 10.0 N a.) Use the
  71. Physics

    A little red wagon with mass 7.0kg moves in a straight line on a frictionless horizontal surface. It has an initial speed of4.00 m/s and then is pushed 3.0m in the direction of the initial velocity by a force with a magnitude of 10.0 N a.) Use the
  72. calculus/finite

    I am taking an online finite math class, so I don't have an instuctor to sit down with me and help me. The text book is so hard to follow. One of the problems I have having a hard time with gives an initial tableau and asks us to use the simplex method to
  73. chemistry

    1. Given that 50 grams of ice is heated at -20.0 °C to steam at 135.0 °C. i. Show the graph of the changes from ice to steam ii. Calculate the energy needed to change the ice to steam Please use these values: Heat of fusion = 334.16 J g¯1 Heat of
  74. Chemistry

    A mixture of chromium and zinc weighing .362 g was reacted with an excess of hydrochloric acid. After all the metals in the mixture reacted 225 mL of dry hydrogen gas was collected at 27 C and 750 torr. Determine the mass percent Zn in the metal sample.
  75. Chemistry- URGENT please HELP

    NH4NO3(s)+H2O(l)→NH4NO3(aq) ΔH = +25.7 kJ. What is the final temperature in a squeezed cold pack that contains 49.0g of NH4NO3 dissolved in 125 mL of water? Assume a specific heat of 4.18J/(g⋅∘C) for the solution, an initial
  76. physics

    A 0.10 kg piece of copper at an initial temperature of 95degC is dropped into 0.20 kg of water contained in a 0.28 kg aluminum calorimeter. The water and calorimeter are initially at 15degC. What is the final temperature of the system when it reaches
  77. college algebra

    Isn't this a plug and chug? I will be happy to critique your thinking. Your equal signs in the function are not correct, I assume that is a typo. suppose a baseball is shot up from thr ground straight up with an initial velosity of 32 feet per second . A
  78. Chem

    O3 + NO --> O2 + NO2 Write the rate law equation for the reaction. Explain how you obtained your answer. Experiment 1: [O3] .0010 [NO] .0010 Rate of formation of NO2 x Experiment 2: [O3] .0010 [NO] .0020 Rate of formation of NO2 2x Experiment 3: [O3]
  79. math

    A soccer player kicks a ball and gives it an initial upward velocity of 47 feet per second. If everyone waits for the ball to bounce, how long will it be in the air? (Use the vertical motion formula, h= -16tsquared + vt + c, where h is the height of the
  80. Chemistry

    The problem states, 'A student wants to determine how long it takes to dissolve 51.3 g of common table salt (sodium chloride) in 1L of water by monitoring the solution. It takes 26.7 seconds for the salt to completely dissolve. Determine the rate of
  81. Physics - stuck

    Car A has an initial speed of 15m/s and is gaining speed at 1.5m/s^2. Car B has an initial speed of 20m/s and is gaining speed at 2.0m/s^2. The initial distance between them is 168m. Find when and where the cars will pass one another and their speeds as
  82. Chemistry

    Reposting since it wasn't clear in the previous post S2O82-(aq) + 2I-(aq) ----------> 2SO42-(aq) + I2(aq) (I) Rate = k [S2O82-]x [I-]y Rate1 = k [S2O82-]x [I-]y Experiment data Experiment: 0.20M NaI,0.20M NaCl, 0.010M Na2S2O3,2% Starch,0.20M K2SO4, 0.20
  83. Science

    A gas has an initial volume of 2.5 L at a temperature of 275 K and a pressure of 2.1 atm. The pressure of the gas increases to 2.7 atm, and the temperature of the gas increases to 298 K. The final volume of the gas, rounded to the nearest tenth, is
  84. college chemistry

    Calcium oxide (CaO), an important ingredient in cement, is produced by decomposing calcium carbonate (CaCO3) at high temperature: CaCO3(s) → CaO(s) + CO2(g) In one particular reaction, 40 g of CaCO3 is heated at 750°C in a 5.0 L vessel. The pressure
  85. math-story prob

    Please help: Jaylee wants to have a mural for her room. She has two bids: #1 Artist charges an initial fee of $79.50, plus $1 sq ft. Artist #2 does not charge a initial fee and charges $2.50 sq ft. Which size of mural(in sq ft) will be the same cost when
  86. 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
  87. science

    A thermally insulated 50 ohm resistor carries a current of 1 A for 1 s. The initial temperature of the resistor is 10 degree Celsius, its mass is 5 g, its specific heat capacity is 850. What is the change in entropy of the resistor?
  88. Chemistry (volume of gas)

    A sample of argon at 2.0 atm pressure is heated until its temperature is raised from 60 °C to 90 °C. The pressure of the gas at this temperature is 3.0 atm and the volume is 4.4 L. What was the initial volume of the gas?
  89. chemistry

    determine the number of grams of Ne gas that must be added to a container in order for the volume to increase to 38.2 L at constant pressure and temperature if the container had an initial volume of 25.0 L and 2.0 moles of Ne
  90. Accounting

    Hi, Please would it be possible to advise me on this problem? Should asset purchases be included as expenses if they are paid form personnal savings and not a business acount? I need to know if I should include them on a summary of a businesses income and
  91. Chemistry

    Dr.Bobb222 please help balance the following oxidation-reduction reactions, which occur in acidic solution, using the half-reaction method. (Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.) (a)
  92. Math

    Make a table and graph each quadratic function. Use integers from -3 to 3 for inputs. #4- y= -x2 #5- y=2x squared #6- y= -8x squared #7- y= x squared + 2 Make a table and a graph for each function. Use only positive values for x. #10- y= 10/x #11- y= 8/x
  93. math

    make A 14 dot array that has exactly 2 rows
  94. math

    make 14-dot array that has exactly 2 rows
  95. Business

    Prepare a 1,050-1,750-word (3 to 5 pages) paper in which you analyze at least seven of the forces and trends from the list in the table shown above. Your analysis must include economic as well as legal and regulatory forces. The other five are your
  96. Physics

    A rocket is launched at an angle of è = 48° above the horizontal with an initial speed vi = 62 m/s, as shown below. It moves for 25 s along its initial line of motion wth an acceleration of 25.6 m/s2. At this time, its engines fail and the rocket
  97. keyboarding

    1. When typing personal titles in correspondence, you should always include the person's name if you know it. If you don't know the person's name, which of the following should you use? A. To whom it may concern B. Ladies and Gentlemen C. Sir or Ma'am D.
  98. Chemistry

    1. Calculate the mass of each compound required to make 25mL of the following solutions: (a) 0.10 M Ni(NO3)2 • 6H2O (b) 1.0 M NaClO4 • H2O (c) 0.11 M trien (C6H18N4) 2. Calculate the concentrations of Ni2+ and trien in a solution prepared by mixing
  99. Chemistry (Check and Help)

    Determine the type of chemical reaction, find the limiting reagent, determine the amount of product in grams, and the amount in grams of excess reagent. 8.75 g of mercury (II) nitrate solution is mixed with 9.83 g sodium iodide solution (ppt). Hg(NO3)2(aq)
  100. PHYSÝCS

    At the end of the spring term, a high school physics class celebrates by shooting a bundle of exam papers into the town landfill with a homemade catapult. They aim for a point that is 31.1 m away and at the same height from which the catapult releases the