1. Chemistry

    for the reaction: c3h8+5o2=3co2 +4h2o how many moles of o2 will be produced in the complete combustion of 0.75 moles of c3h8?
  2. Chemistry

    I understand how to balance equations when the full equations are given to me but I don't understand how to write a single replacement reaction. Help Me??
  3. CHEMISTRY

    For the following reaction, what mass of SIC is made from120.2g of SIO2 and 120g of C? SiO2(s) + 3C(s) ---SiC(s) +2CO(g)
  4. CHEMISTRY

    For the following reaction, what mass of SIC is made from120.2g of SIO2 and 120g of C? SiO2(s) + 3C(s) ---SiC(s) +2CO(g)
  5. Chemistry

    What mass of silver chloride can be prepared by the reaction of 160.0 mL of 0.10 M silver nitrate with 120.0 mL of 0.19 M calcium chloride?
  6. chemistry

    Consider the reaction, C2H4 (g) + H2 (g)- C2H6 (g) where -137kJ of heat is released. How many kilojoules are released when 55.3g of C2H4 reacts?
  7. chemistry

    How many molecules of NH3 could be generated from 64 molecules of N2 and 210 molecules of H2? How many molecules of N2 and H2 would be left over after the reaction?
  8. chemistry

    How many molecules of NH3 could be generated from 64 molecules of N2 and 210 molecules of H2? How many molecules of N2 and H2 would be left over after the reaction?
  9. chemistry

    Calculate the standard free-energy change for the following reaction at 25 °C. 2Au^3+(aq) + 3Ni(s) -->2Au(s) + 3Ni^2+(aq)
  10. CHEMISTRY

    The equilibrium constant KP for the following reaction is 4 atm^2 at 300 K. AB(s) ---> A(g) + B(g) What is the equilibrium pressure of A(g) and B(g) above AB(s) at 300 K? What is KC at 300K?
  11. chemistry

    Given the following information: Ni(OH)2(s) Ni2+(aq) + 2 OH (aq) Ksp=6.0 x 10 16 H2O(l) H+(aq) + OH (aq) Kw=1.0 x 10 14 What is the equilibrium constant for the reaction, Ni(OH)2(s) + 2 H+(aq) Ni2+(aq)+ 2 H2O(l)
  12. chem

    How many moles of C6H12O6 are formed when 0.250 mole of CO2 is consumed in the reaction 6 CO2 + 6 H2O C6H12O6 + 6 O2?
  13. chem

    what is the balance reaction when HCL reacts with NH3? is it HCl+NH3-->NH4Cl am I right correct me pls.
  14. Chemistry

    If 16.9 g of CO2 was produced from the thermal decomposition of 41.83 g of CaCO3, what is the percentage yield of the reaction? CaCO3(s) > CaO(s) + CO2(g)
  15. chemistry

    in reaction = Mg + O2 --> MgO if 24 gram of Mg is burned in excess oxygen to form 40 gram of MgO, How much O2 is used?
  16. chemistry

    According to the reaction NaOH + HCl ¨ NaCl + H2O, which is the limiting reactant when 37.0 g of HCl are mixed with 37.0 g NaOH?
  17. chemistry

    In the reaction below, ΔH°f is zero for ___________. Ni(s) + 2CO(g) + 2PF3(g) = Ni(CO)2(PF3)2(l) Ni(s) CO(g) Ni(CO)2(PF3)2(l) both CO(g) and PF3(g) PF3(g)
  18. chemistry

    Why must the number of electrons lost equal the number of electrons gained in every redox reaction?
  19. Gr 12 chemistry

    Based on this reaction: H2(g) + I2(g)= 2HI(g) How many moles of iodine are necessary for form 0.530 moles of hydrogen iodine
  20. Chemistry

    Consider the reaction: Fe2O3+2Al=Al2O3 How many grams of Al are necessary to make 100.2 grams of Al2O3?
  21. Chemistry

    When heated, KClO3 decomposes into KCl and O2. If this reaction produced 79.9 g of KCl, how much O2 was produced (in grams)?
  22. Chemistry

    For the reaction C + 2H2 -> CH4 How many grams of hydrogen are required to produce 145 grams of methane, CH4
  23. Chemistry

    Can bf3 be a limiting reagent in hydroboration reaction? because in all the websites I saw alkene was the limiting reagent
  24. math

    the temperature in the desert can drop as much as 40'f from noon to midnight .At noon on july 31st the temperature in sahara desert is 3'f .If th temperature drps 39'f by midnight , what is the temperature at midnight ?
  25. Health

    I ran a mile today in gym class, and I started to get really itchy. My skin felt very hot like it was on fire, and after I was done running I got a hives on my legs which lasted for ten minutes at least. I'm not sure if I have a reaction to the cold (it was in the high fifties...
  26. Physics

    A 1.0 102 g piece of copper at a temperature of 460 K and a 2.0 102 g piece of aluminum at a temperature of 2.2 102 K are dropped into an insulated bucket containing 5.0 102 g of water at 280 K. What is the equilibrium temperature of the mixture? (Use the specific heats found ...
  27. physics

    1. (a) How far below an initial straight-line path will a projectile fall in eight seconds? (b) Does your answer depend on the angle of launch or on the initial speed of the projectile? the answer is no. but defend it. 2. Why is it important that a satellite be above Earth's ...
  28. Chemistry

    Hello I need help with this excersise: How many moles of NH4Cl are neccesary to add to 1 liter of solution of Co2+ 0,20 M in order to prevent the precipitation when the solution is saturated with H2S (0,1M) and the pH is 7,50. It 's known that pKbNH3=4,75 ; Kps(CoS)=2,0×10^-...
  29. Chemistry

    PLEASE help because I'm really confused on how to do the entire thing. I don't know how to find the mL. Am I suppose to do anything with the 250mL? A person stops in every day and orders 250 mL of house coffee at precisely 95°C. but enough milk at 10°C to drop the ...
  30. physics

    A volume Vi = 23.1 L of air at temperature T = 21 ¢XC is compressed at constant temperature to a volume Vf = 7.7 L. The relative humidity of the air before compression is R = 56.4 %. Saturated water vapour in air at this temperature has a vapour pressure vp = 2.5 kPa and a ...
  31. CHEMISTRY! HELP

    I'm not sure how to do or show the work for these two questions. A) & B.)!! please anyone help: A.) Suppose a chemical reaction starts with 5.00 g of copper (i) nitrate and 2.00 g of magnesium chloride. Balanced Equation: 2 CuNo3 + MgCl2 ---> 2 CuCl + MgNO3 1.) determine ...
  32. Newton's Law of Cooling

    You are a forensic doctor called to a murder scene. When the victim was discovered, the body temperature was measured and found to be 20°C. You arrive one hour later and find the body temperature at that time to be 18°C. Assuming that the ambient temperature remained ...
  33. chemistry

    How many electrons are transferred in the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water?
  34. chemistry

    How many electrons are transferred in the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water?
  35. chemistry

    In the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water, the oxidizing agent is
  36. Chemistry

    How many electrons are transferred in the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water?
  37. Chemistry

    How many electrons are transferred in the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water?
  38. chem

    How many electrons are transferred in the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water
  39. chemistry

    write a balanced equation for the reaction that occurs when an aqueous solution of iron(II) chloride is mixed with an aqueous solution o potassium hydroxide.
  40. gr12 chem

    Both propane and propene react with bromine. State two ways in which these two hydrocarbons can be distinguished in their reaction with bromine
  41. Chemistry

    The following reaction represents the decomposition for water: 2H2O - 2H + O How many molecules of hydrogen are produced from the decomposition of 12.2 grams of water into its elements?
  42. Chem B

    What mass of acetylene, C2H2, will be produced for the reaction of 90.g of calcium carbide, CaC2, with water in the following reacion? CaC2(s) + 2H20(l) ---> C2H2(g) + Ca(OH)2(s)
  43. chemistry

    In the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water, the oxidizing agent is is it Fe?
  44. College Chemistry

    The Cu2+ ions in this experiment are produced by the reaction of 1.0 g copper turnings with excess nitric acid. How many moles of Cu2+ are produced?
  45. Chemistry

    Given the following reaction: HCl(g) + SrO(s) ¨ SrCl2(s) + H2O Calculate the mass of HCl in grams that would react with 11.44 kg SrO.
  46. Chemistry

    Write a net ionic equation and calculate K for the reaction in aq between acidic acid and sodium hydroxide. Given Ka (acidic acid) = 1.8 x 10^-5
  47. Pre Chem

    How much heat will be produced when 16grams of C2H6 burns? The reaction is 2 C2H6 + 7 O2 --> 4CO2 + 6 H20 triangle heat = -350kJ
  48. Chemistry

    Calculte the Percent Yield if 104grams of CH3CO2CH2CH3 is produced by reaction of 111grams of CH3CO2H according to : CH3CO2H + CH3CH2OH = CH3CO2CH2CH3 + H20
  49. Chemistry

    Determine Kc for the following reaction: 1/2N2(g) + 1/2O2(g)+ 1/2Br(g) <-> NOBr(g) from the following information (at 298K) 2No(g) <-> N2(g) + O2(g) Kc = 2.1x10^30 NO(g) + 1/2Br2(g) <-> NOBr(g) Kc = 1.4
  50. AP Chemistry

    In the reaction below, 23 g of H2S with excess O2 produced 9 g of sulfur. ? H2S + ? O2 → ? S + ? H2O . What is the percent yield of sulfur? Answer in units of %
  51. Chemistry

    In the following reaction, how many liters of oxygen will react with 124.5 liters of propane (C3H8), at STP? C3H8 + 5O2 = 3CO2 + 4H2O
  52. chemistry

    write the equation of the neutralization of sulfuric acid (H2SO4) with potassium hydroxide (KOH) and write the net ionic equation for the reaction
  53. Chemistry

    Use the equations with the enthalpy information given below to calculate the ÄH° for the reaction: S(s) + O2(g) --> SO2(g) S(s) + 3/2 O2(g) --> SO3(g) ÄH° = -395kJ 2 SO2(g) + O2(g) --> 2 SO3(g) ÄH° = -198.2 kJ
  54. chemistry

    . How many grams of H2SO4 (98.1 g·mol-1) are required to react with 4.0 g NaOH (40.0 g·mol-1) in this neutralization reaction?H2SO4 + 2NaOH  Na2SO4 + 2H2O a. 2.4 g b. 4.9 g c. 9.8 g d. 20 g
  55. Chemistry

    At 25°C, Kp 1 10-31 for the following reaction: N2(g) + O2(g) 2 NO(g) Calculate the concentration of NO, in molecules/cm3, that can exist in equilibrium in air at 25°C. In air, PN2 = 0.8 atm and PO2 = 0.2 atm.
  56. physics

    In the reaction U gives Th + He 6.88*10-13 J energy are released as the kinetic energies of the products. If the ratios of the masses Th to He is 2.4:4 find the kinetic energy of the alpha particle
  57. CHEMISTRY

    CaC2 (s) + 2 H20 (g) -> Ca(OH)2 (s) + C2H2 (g) The complete reaction of 22.7 g of CaC2 requires consumption of ________g of H2O. I did 22.7 g CaC2* (2/64 mols CaC2) = .709 Right?!?!
  58. ap chemistry

    The reaction of 9.5 grams of fluorine with excess chlorine produced 5.9 grams of ClF3. What percent yield of ClF3 was obtained? Answer in units of %
  59. AP Chemistry

    In the reaction below, 16 g of H2S with excess O2 produced 8 g of sulfur. ? H2S + ? O2 → ? S + ? H2O . What is the percent yield of sulfur? Answer in units of %
  60. chemistry

    CaO + C --> CaC2 + CO2 [unbalanced] If 244 g of CaO is combined with 318 g C, how many grams of CO2 could be produced if the reaction goes to completion?
  61. Chemistry

    Assume that a particular reaction evolves 230 kJ of heat and that 28 kJ of PV work is gained by the system. What are the values of delta E and delta H for the system? For the surroundings?
  62. Chemistry

    A solution containing 0.100 mol of Na2CO3 and 0.100 mol of NiCl2 is allowed to react. What mass of precipitate forms in this reaction?
  63. chemistry

    10g of silver nitrate solution is added to 10g sodium chloride solution? what change in mass do you except after the reaction and why?
  64. Chemistry

    1.Write an equilibrium constant equation for the following reaction: 4NH3(g)+5O2(g)= 4NO(g)+6H2O(g) 2. What does the above [] mean in the above equation?
  65. Chemistry

    1.Write an equilibrium constant equation for the following reaction: 4NH3(g)+5O2(g)= 4NO(g)+6H2O(g) 2. What does the above [] mean in the above equation?
  66. AP Chemistry

    How many moles of butane do we need to produce 10 moles of CO2 by reaction with oxygen? I think the balanced equation is 2 C4H10 + 13 O2 -----> 8 CO2 + 10 H2O
  67. Chemistry Help

    How many moles of butane do we need to produce 10 moles of CO2 by reaction with oxygen? I think the balanced equation is 2 C4H10 + 13 O2 -----> 8 CO2 + 10 H2O
  68. Chemistry

    If 4.41 moles of C5H12 react with excess O2, how many moles of CO2 will be produced in the following combustion reaction? C5H12+8O2 --> 6H2O+5CO2
  69. ap chemnstry

    What is the standard reaction free energy if the standard cell emf is 1.23? Faraday’s constant is 96485 C/mol. Answer in units of kJ/mol
  70. Chemistry

    From the solubility product constants for CaF2 (fluorite) and CaSO4 (anhydrite) determine the equilibrium constant for the reaction CaF2 + SO4 2- --> CaSO4 + 2F-
  71. Chemistry

    Calculate the enthalpy change, ∆H in kJ, for the reaction H2O(s) → H2(g) + 1/2O2(g) Use the following: A. –291.9 kJ B. +291.9 kJ C. –279.9 k D. +279.9 kJ D??
  72. Chem 130

    How many grams of the adipic acid (C6H10O4) could form from the reaction of 15.00 g of cyclohexane (C6H12) with the 25.00 g of oxygen? Will the formula be... 2O2 + C6H12 ---> C6H10O4
  73. chem

    Fe3O4(s) + C(s) > CO2 + Fe Balance the chemical reaction and calculate how many moles of Fe3O4 must be reacted to produce 440 gr CO2 (the > is an arrow)
  74. science

    If 0.188 moles of zinc reacts with excess lead(IV) sulfate, how many grams of zinc sulfate would be produced in the following reaction?
  75. science

    If 0.188 moles of zinc reacts with excess lead(IV) sulfate, how many grams of zinc sulfate would be produced in the following reaction?
  76. ChemistryPRELABS

    In the synthesis of K3[Al(C2O4)3].3H2O, 0.0357 moles of the limiting reagent were used in the reaction. What is the maximum possible yield? And which is the limiting reagent?
  77. AP Chemistry

    The reaction of 5.1 grams of fluorine with excess chlorine produced 4.5 grams of ClF3. What percent yield of ClF3 was obtained? Answer in unites of %
  78. Chem

    A student reacts 57g of salicylic acid with 21 mL of acetic anhydride producing 10.5g of acetyl salicylic acid. What is the percent yield of the reaction?
  79. chemistry

    when heated, kclo3 decomposes into kcl ad 02. 2kclo3--> 2kcl+3o2 if this reaction produced 61.7 g of kcl, how much o2 was produced (in grams)?
  80. AP Chemistry

    The reaction of 5.7 grams of fluorine with excess chlorine produced 7.6 grams of ClF3. What percent yield of ClF3 was obtained? Answer in units of %.
  81. chemistry help ?!

    Which of the following is an exothermic reaction? sugar dissolving in water <<my choice an explosion tea dissolving in water the cooling of an ice pack
  82. Chemistry

    What volume of N2O (s) will be generated if 3.13 g of NH4NO3 (s) decomposes at 1.00 atm and 50 degrees celsius, given the following decomposition reaction: NH4NO3 (s) --> N2O (g) + 2 H2) (l)?
  83. college chemistry

    The equilibrium constant for the reaction Sr(s) + Mg2+(aq) <---> Sr2+(aq) +Mg(s) is 3.69 x 10^17 at 25 C. Calculate Ecell for a cell made up of Sr/Sr2+ and Mg/Mg2+ half cells.
  84. AP Chemistry

    The reaction of 8 grams of fluorine with excess chlorine produced 6.4 grams of ClF3. What percent yield of ClF3 was obtained? Answer in units of %
  85. chemistry

    For the reaction 2CO(g)+O2 《=》2CO2 with equilibrium constant Kc. Suppose the equation is rewritten as CO + 1/2O2 《=》CO2 with an equilibrium constant Kc'.what is the relationship between Kc and Kc'
  86. chemistry

    For the reaction 2CO(g)+O2 《=》2CO2 with equilibrium constant Kc. Suppose the equation is rewritten as CO + 1/2O2 《=》CO2 with an equilibrium constant Kc'.what is the relationship between Kc and Kc'
  87. Physics

    Two hockey pucks approach each other as shown in the figure below. Puck 1 has an initial speed of 22 m/s, and puck 2 has an initial speed of 14 m/s. They collide and stick together. Find the components along x and y of the initial velocities of both particles. v1xi = 19.1 m/s ...
  88. Physics

    A block with a mass m = 3.50 kg sits on a surface with a coefficient of static friction µs = 0.520. A spring with spring constant k = 75.0 N/m is hooked onto the block, and is slowly pulled horizontally, gradually stretching the spring. (a) When the spring is stretched 10.0 ...
  89. Math

    At 6:00 A.M. the temperature was 33°F. By noon the temperature had increased by 10°F and by 3:00 P.M. it had increased another 12°F. If at 10:00 P.M. the temperature had decreased by 15°F, how much does the temperature need to rise or fall to return to the original ...
  90. Physics

    Many of you may have noticed the phenomenon that basketballs get flat if the weather is cold. If a basketball was inflated to a gauge pressure of 60,000 Pa when the temperature outside was 20∘C, what is the gauge pressure inside the basketball in Pa when the temperature ...
  91. SCIENCE HELP PLEASE PLEASE

    Post a New Question Current Questions Homework Help: Science. NEED HELP PLEASE Posted by Kalie on Tuesday, January 14, 2014 at 11:04pm. Can someone check if these are right: Tell the reaction rate 1.)Question: one antacid tablet is placed in a glass of cold water, while ...
  92. Chemistry

    A 10.00 g strip of zinc metal is placed in 100. mL of 0.250 M silver nitrate solution. When the reaction that occurs finally ceases, what will be the mass of unreacted zinc metal in the strip? What will be the mass of silver metal that “plates out” of solution (that is, ...
  93. Chem

    An important process for the production of acrylonitrile C3H3N is given by the following reaction 2C3H6 + 2NH3 + 3O2 --> 2C3H3N + 6H2O A 150 -L reactor is charged tot he following partial pressures at 25 C
  94. biology - true or false

    1) The dark reaction (Calvin cycle) will not take place in the presence of light. 2) If the concentration of carbon dioxide increases, chances are photosynthesis will plateua if there is an insufficient amount of light.
  95. biology

    Which enzymes are for breaking down hydrogen peroxide into oxygen and hydrogen gases? Explain your answer using your results. Can more than one enzyme be used to perform a particular reaction? Why or why not?
  96. chemistry

    Gaseous arsine reacts according to the balanced equation. If a total of -3663 KJ of heat is produced in the reaction as written, how many grams of AsH3 are consumed? (Enthalpy= -1867.2) 2 AsH3(g) + 3 O2(g) --> As2O3(s) + 3 H2O(l)
  97. chemistry

    The absorbance values At & A0 recorded in the experiment 'Rate Law Determination of the Crystal Violet Reaction' are used in the place of the concentration values of which species? A. –OH B. CVOH C. CV+ D. Na+ E. H2O I'm pretty sure this is CV+ right?
  98. Chemistry 2 Ap

    Calculate the masses of Cr2O3, N2, H20 produced from 10.8 g (NH4)2Cr2O7 [ the 2 belongs to the nh4] in an ammonium dichromate volcano reaction. I need to know what the balance equation is, and im having a little trouble with it. Pleasee help!
  99. Chemistry

    1. What are the products to the reaction below: NH3+CH3CH2CH2Br-->? 2. Why does oxaloacetic acid has a higher Ka compared to succinic acid? 3. Which hydrogen atoms will malic lose if it ionizes completely? No ideas on any of these questions. Please help! Thank you!
  100. Chemistry

    Chlorine gas may be easily prepared in the lab according to the reaction: 2KMnO4(s)+ 16HCl(aq)-> 2 MnCl2(aq)+5Cl2(g)+ 8H2O(l)+ 2KCl(aq) What mass of HCl is needed to prepare 1 mole of Cl2 gas?
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