1. science

    How does temperature affect the rate of a reaction? I have to create a hypothesis and just put the definition as well, but I want a short simple answer to it. Please and thank you.
  2. Chemistry

    Write an equation for the reaction that takes place when each base is added to water. A) LiOH B) (CH3)2NH.
  3. Chemistry

    If a particular reaction evolves 192 kJ of heat while expanding from 1.00 L to 2.00 L at 125 atm of pressure, what is the overall energy change for the system?
  4. biology

    What happens when two molecules in a polysaccharide split apart? What is this process called? What enivornment do polysaccharides need to be in to perform this reaction? What is the ratio of C:H:O in sucrose?
  5. Chemistry

    What is the theoretical mass of the products in the double displacement reaction: CaCl2 (aq) + Na2CO3 (aq) → 2NaCl (aq) +CaCO3 (aq)
  6. Chemistry

    H2SO4(aq) + H2O(l) ⟶ H3O+(aq) + HSO4–(aq) (Stage I) Identify the Brønsted-Lowry acid and base in the reaction.
  7. chemistry

    what mass of oxygen would be required to completely burn 6.75 g of propane in the following reaction? C3H8+5O2 => 3CO2+4H2O * please help
  8. CHEMISTRY hw

    enter the net ionic equation, including phases, for the reaction of AgNO3(aq)with Ba(OH)2(aq). 2AgNO3 + Ba(OH)2--->2AgOH +Ba(NO3)2
  9. Chemistry

    If in the given reaction, 3I 2 + OH- ---> IO3 - + 5I- 2 moles of iodine are taken, then the ratio of iodate and iodide ions formed in the alkaline medium is
  10. Chemistry

    How many grams of silver will be produced on the reaction of 50.00g iron metal with an excess of a copper (ii) sulfate solution ?
  11. chem

    what is the percent yield if 27 g of h20 obtained when 33 g of c3h8 reacts with 56 L of 02 at STP.The secong product of reaction is CO2
  12. Physical Science

    What are the products of a double replacement reaction between potassium bromide and silver nitrate? Name the resulting compounds.
  13. chemisry

    In order for a reaction to occur, particles must ______ in the proper _____ . What are the 2 words would be correctly fill in the blank? Thanks
  14. health

    What are the interrelations of blood clotting, immune response, allergic reaction, and hormone release. I have been trying to figure this out for 3 days now. Please help! Thank you.
  15. organic chemistry

    What is the product of reaction of triphenylmethanol heated up with 40% HI in glacial acetic acid and then treated with sodium bisulfite?
  16. Health,Safety,andNutrition

    A condition often brought on by an allergic reaction is: A: anemia B: diabetes C: asthma D: seizures I picked C Thanks
  17. Physics

    Determine the stopping distances for a car with an initial speed of 93 km/h & human reaction time of 0.80 s, for an acceleration a=−4.0m/s2.?
  18. chemistry

    The half-life of a first order reaction is determined to be 92.0 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?
  19. chemistry

    The half-life of a first order reaction is determined to be 65.0 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?
  20. chemistry

    If the equilibrium constant for a one-electron redox reaction at 298 K is 7.8 104, calculate the corresponding ÄG° and E°cell. how would i set this problem up?
  21. Chemistry

    The half-life of a first order reaction is determined to be 85.5 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?
  22. organic chemistry

    Predict the relative rates for the reaction of butadiene and (a) ethene, (b) methyl propenoate, (c) maleic anhydrid.
  23. organic chemistry

    Predict the relative rates for the reaction of butadiene and (a) ethene, (b) methyl propenoate, (c) maleic anhydrid.
  24. Chemistry

    Give the equation for the base hydrolysis of methyl benzoate by KOH. What are the 2 types of molecules being formed in this reaction?
  25. CHEMISTRY

    Method for getting correct answer? Thank You! What is Kp for the reaction below, if Kc = 1.13e-3 at 111.2°C? 4A(s) + 5B(g) ↔ 3C(g) a. 1.36e-5 b. 1.15e-12 c. 1.14e-6 d. 8.42e-3
  26. chemistry

    Calculate the free energy change of the following reaction (in kJ). 3A^2+ +2B------->3A + 2B^3+ Ecell= 1.66 -(5 mol)*(9.65*10^4)*1.66= -8.0095*10^5 Did I do it right? or is the number of electrons wrong?
  27. Chemistry

    Balance the following equation for a half reaction that occurs in basic solution. Use e– as the symbol for an electron. SO3^2- ---> S2O4^2-
  28. chemistry

    For the reaction 2A(g) + B(aq) + 3C(l)<------> D(s) + 3E(g), the concentrations at equilibrium are found to be: A: 2.3x10^3 Pa B: 1.8x10^-2 M C: 15.8M D: 12.5M E: 5.6x10^4 Torr i got an answer of 1.83x10^-13 is this correct??
  29. Chemistry

    What volume of hydrogen would be produced by the reaction of 2.00g of Mg with an excess of hydrochloric acid at STP. Using this equation Mg+HCl
  30. chemistry

    How many grams of Mg(OH)2 are needed to neutralize 55 ml of 0.25 M HCl . according to the following reaction. (show all calculations for credit) Mg(OH)2 (aq) + 2HCl(aq) --- MgCl2 (aq) + 2H2O(l)
  31. chemistry

    why wouldn't a higher experimental ratio of HCl increase the reaction rate for synthesis of t-pentyl alcohol?
  32. chemistry

    Based on the following reaction 2A + 3B --> A2B3, if 1 mole of A is reacted with 2 moles of B, explain how you would determine which of the two substances is the limiting reactant.
  33. Chemistry

    what is the precipitate formed when benedicts solution reacts with glucose? give the net ionic equation for the reaction.
  34. chemistry

    consider equilibrium equation below `Mg(NO3)2(aq) + 2Na(OH)(aq) <--> Mg(OH)2(s) + 2NaNO3 (aq) If NH3 is added, according to Le Chatelier's Principle, which way would reaction shift?
  35. chemistry

    Consider the following equation: CO + 2 H2 → CH3OH △H rxn = -128 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 8.08 g H2
  36. Chemistry

    When magnesium hydrogen carbonate reacts with sulfuric acid, would you consider that an exothermic reaction because it forms CO2 (gas)?
  37. Chem

    H2SO4(aq) + Ba(NO3)2(aq) = BaSO4(s) + 2HNO3(aq) overall heat gen by reaction answer is supposed to be -659.3 but I keep coming up with something else.
  38. Chemistry

    Is the equation of the chemical reaction that occurs when you blow your breath through boiling water? CO2 + H2O -> H + HCO3
  39. chem

    Consider the reaction 4KO2(s) + 2CO2(g) ! 2K2CO3(s) + 3O2(g) . How much KO2 is needed to react with 75.0 L of carbon dioxide at STP?
  40. chemistry

    Urea (CO(NH2)2) can react with water to form CONH2NH+ 3 and a hydroxide ion. Which statement is true for this reaction?
  41. chemistry

    consider the reaction 2NaF if you begin with 4.8 mol S and 2.6 mole F, what is the limiting reactant and theorical yield of NaF in moles
  42. physics

    a uniform rod is 1m caring a weight of 100N calculate its tension of the string holding it an the reaction at the hinge
  43. chemistry

    i need steps of solving this question Balance the oxidation reduction equation in electron ion / half reaction please best regards
  44. ELA

    In "a days wait", how can the fathers reaction to his sons concern best be describe? A. Impatient B. Anger C. Frustrated D. Understanding
  45. Chemistry

    Given the Na+/Na and K+/K half-cells, determine the overall electrochemical reaction that proceeds spontaneously and the E0 value. Answer in units of V Can you please explain the steps?
  46. Chemistry

    how do you and write a combination of reaction equations? Sodium metal reacts with chlorine gas? Na(s) + Cl(subscript)2(g)---______?
  47. Chemistry

    In the reaction C(s) + 2S(s) ¨ CS2(l), the change of enthalpy (ƒ¢H) is 89.3 kJ. Calculate the amount of heat absorbed when 6.33 g of carbon disulfide is formed.
  48. Chemistry

    Write the ionic equation for the reaction of lead 2 nitrate reacting with the acidic solution to form a precipitate
  49. English

    Which one of the following is a correct example of the singular possessive case? 1) women's club 2) audiences' reaction 3) who's job 4) king's rights
  50. chemistry

    Write the balanced equation for the neutralization reaction between H3PO4 and NaOH in aqueous solution. Phases are optional.
  51. chem

    Consider the reaction when aqueous solutions of sodium nitrate and ammonium sulfide are combined. net ionic equation?
  52. UNE

    How many grams of sodium carbonate is required to have a complete reaction with 1.00g of calcium chloride dihydrate? I can't figure this out...help!
  53. College Chemistry..Urgent!

    THE EQUILIBRIUM CONSTANT FOR A REACTION IS 2.48 AT 25 DEGREES CELSIUS. WHAT IS THE VALUE OF ΔG°(KJ)AT THIS TEMPERATURE? (R=8.314 J/K mol)
  54. Chem - Stoichiometry

    How many grams of sodium carbonate is required for a complete reaction with 1.00g of calcium chloride dihydrate? Help!
  55. Chem - Stoichiometry

    How many grams of sodium carbonate is required for a complete reaction with 1.00g of calcium chloride dihydrate? Help!
  56. CHEMISTRY

    Balance the oxidation reduction equation in half reaction PbO2 + KCl => KClO + KPb(OH)3 thank you a lot
  57. chemistry

    I need the equilibrium constant for the following reaction @ 25 deg. C 2CaCO3 (calcite) + Mg2+ <==> CaMg(CO3)2 (dolomite) + Ca2+
  58. Chem

    Write a balanced equation for reaction of sodium with diethyl amine, molecular hydrogen, ethanol, and water.
  59. chem11

    write out the balanced reaction for magnesium and copper (I) chloride solution. Mg2(s) + 4CuCl2(aq) -> 2MgCl2(aq) + 4Cu(s) is this right? i'm not sure exactly how to do this. Please help
  60. Chemistry

    Write the balanced equation for the neutralization reaction between H3PO4 and NaOH in aqueous solution. Phases are optional.
  61. chem

    4Fe(s) + 3O2(g) → 2Fe2O3(s) Identify the type of chemical reaction represented by this equation. is it redox?
  62. chemistry

    What volume of carbon dioxide is produced when 36.7 g of calcium carbonate reacts completely according to the following reaction at 25oC and 1 atm?
  63. chemistry

    The half-life of a first order reaction is determined to be 60.5 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?
  64. Chemistry

    The half-life of a first order reaction is determined to be 92.0 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?
  65. chemistry

    The half-life of a first order reaction is determined to be 79.0 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?
  66. Chemistry

    The half-life of a first order reaction is determined to be 61.0 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?
  67. chemistry

    The half-life of a first order reaction is determined to be 74.5 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?
  68. gen hem

    what is the free energy change in kJ for the reaction below? 2NO3-(aq)+8H+(aq)+3Hg(l) <-->2NO(g)+4H2O(l)+3Hg2+(aq) E0=0.106V
  69. chem

    Calculate the number of kJ released for the reaction shown below, if you begin with 52 grams of fluorine (F2), and the ΔH = -542 kJ. H2(g) + F2(g) → 2 HF(g)
  70. College Chemistry

    Calculate the heat of formation reaction for SiO2(s)+4HF(g) --> SiF4(g)+2H2O(l) I got -129.6 and it says I'm wrong
  71. Chemistry

    Calculate the volume (in mL) of 0.627 M HNO3 needed to react completely with 8.12 g of BaCO3 in a gas-forming reaction
  72. Chemistry

    What is the minimum amount of 5.9M H2SO4 necessary to produce 27.7g of H2 (g) according to the following reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g)
  73. Chemistry

    Determine how many milliliters of 0.370 M HClO4 will be required to neutralize 58.99 g Ca(OH)2 according to the reaction: 2HC1O4+Ca(OH)2>CaC1O4)2+2H2O How would I set this up?
  74. chemistry

    What mass of bromine gas will form from the complete reaction of 150 g potassium bromide and 120 g of chlorine
  75. Chemistry

    Determine how many milliliters of 0.370 M HClO4 will be required to neutralize 58.99 g Ca(OH)2 according to the reaction: 2HC1O4+Ca(OH)2>CaC1O4)2+2H2O How would I set this up?
  76. gen chem

    what is the pK (=-logK)at 25C for the reaction below? Cl2(g)+6H2O(l)+5Cu2+(aq)<-->2ClO3-(aq)+12H+(aq)+5Cu(s) E0=-1.133V
  77. chemistry

    The following reaction consumes 2.15 kg of Co(g): Co(g) + H2O(g) --> CO2(g) + H2(g) How many total liters of gas are formed if the products are collected at STP?
  78. chemistry

    The following reaction consumes 2.15 kg of CO(g): CO(g) + H2O(g) --> CO2(g) + H2(g) How many total liters of gas are formed if the products are collected at STP?
  79. english

    Which one of the following is a correct example of the singular possessive case? A. king's rights B. audiences' reaction C. women's club D. who's job I think it's C.
  80. chemistry

    An unknown weak monprotic acid with the general formula HA has a Ka=5.5 x 10^-7. what is the value of the equilibrium constant that describes the following reaction? A- +H2O = HA +OH-
  81. chemistry

    When 34.1 g of lead reacts with 6.81 L of oxygen gas, measured at 1.00 atm and 25.0°C, 36.1 kJ of heat is released at constant pressure. What is DH° for this reaction?
  82. chemistry

    In a reaction, 25.0 grams of magnesium are added to a beaker containing 75.0 mL of 2.00 M nitric acid, HNO3. Which reactant is limiting? Which is in excess?
  83. Chemistry

    . Show a chemical reaction by which hardness is added to water that also explains the formation of caves in limestone formations?
  84. chemistry

    Which term in the following reaction would not be included in the equilibrium expression? 2 Na3PO4 (aq) + 3 MgCl2 (aq) → 2 Mg3(PO4)2 (s) + 6 NaCl (aq)
  85. chemistry

    The half-life of a first order reaction is determined to be 72.5 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?
  86. chemistry

    Name the gas formed when a)dilute HCL is added to a mixture of iron filings and sulphur b)dilute HCL is added to a compound of iron and sulphur
  87. Chemistry

    The following table contains data for the equilibrium reaction CH3COOH(g)+ C2H5OH(g)↔ CH3COOC2H5(g)+ H2O(g) T = 100oC. Each row in the table represents a different experiment (diffferent intial concentrations). Initial concentration Equilibrium
  88. chemistry

    Anthroquinone (C14H8O2), an important intermediate in the dye industry, is produced from the reaction of benzene with phthalic anhydride (C8H4O3), followed by dehydration with sulfuric acid. The overall reaction is... C8H4O3 + C6H6 --> C14H8O2 + H20 b)
  89. Math

    Department store A charges 9.75% tax; department store B charges 7.25% tax. if a shopper's pre-tax receipt is between $11.57 and $81.43, write and graph a compound inequality that describes the difference in taxes paid for the two locations (to the nearest
  90. Chemistry

    I need help with a question about chemistry!!!!!!!!!!! I know that motor oil comes in various grades but is it a homogeneous mixture or a compound? Motor oil, as used for lubrication in cars and other such devices, is a homogeneous mixture. It is mostly
  91. chem

    compund containing only C, H, and N yeilds the following data- 1. complete combustion of 34.3 mg of the compund producedmg of CO2 and 40.3 mg of H2O 2. a 65.2mg sample was analyzed by the dumas mthod, giving 35.6 mL of N2 at 740 torr and 25C 3. effusion
  92. Chemistry

    Show the calculation for the limiting reagent when 0.853g of sodium sulfate (95% pure) react with 1.707g of barium hydroxide octahydrate (87% pure) to produce a precipitate of barium sulfate. I've determined the equation is Na2SO4+Ba(OH)2*8H2O=BaSO4+2NaOH
  93. english

    identify the portion that contains a compound subject during the 1940s and 1950s , Dudd Abbott and Lou Costello were a popular comedy team on radio, televison ,and sage a. 1940s and 1950s** b. Bud Abbott and Lou Costello c. radio, televsion, and stage d.
  94. English

    identify the portion that contains a compound subject during the 1940s and 1950s , Dudd Abbott and Lou Costello were a popular comedy team on radio, televison ,and sage  a. 1940s and 1950s b. Bud Abbott and Lou Costello ..... c. radio, televsion, and
  95. Chemistry

    Benzene has a vapor pressure of 100.0 Torr at 26°C. A nonvolatile, nonelectrolyte compound was added to 0.309 mol benzene at 26°C and the vapor pressure of the benzene in the solution decreased to 60.0 Torr. What amount (in moles) of solute molecules
  96. maths

    classes are arranged in a school compound.jss1 is 4km due east of jss2,jss3 is 3km south of jss1 and ss1 is 4km at a bearing of 230 from jss3.calculate the distance and bearing of jss2 from ss1
  97. Chemistry

    Based on the fact that calcium carbonate is an ionic compound, why is it insoluble in water???? Look up your solubility rules. I'm not really sure why, but I know my book states right off that Most sulfide, carbonate, and phosphate salts are only slightly
  98. Chemistry

    PCl5 --> PCl3 + Cl2 (Kp = 630 at 546 K) A system is prepared by placing equimolar amounts of the three gases shown in the equation above in a suitable rigid container held at constant volume. Equilibrium is established at 546 K. (A) When equilibrium is
  99. Thermodynamics

    In one of the boiler rooms in an Industrial Plant, the barometer reads 750 mm Hg. Determine the absolute pressures in Kpa of the following pressure measuring instrument readings: pressure gauges reads 46 psi and 76 in. Hg; and compound gauges registers 13
  100. chemistry

    a packaging engineer is working on a new design for cold packs. A burst chamber in the pack will contain 14.0 mL of water, which will be released and used to dissolve ammonia nitrate. a) If the solubility of NH4NO3 is 190g/100g H2O, what mass of this