1. chemistry

    Complete, Balance and classify the chemical reaction....please help do not understand A)Li(s)+AuCL3(aq)-> B)AL(NO3)(aq)+K2CO3(ag)-> C)Ba(s)+F2(g)-> D)SnCI2(aq)+Na3PO4(aq)-> E)Na+AICI3(s)->
  2. Chemistry

    In the reaction Al2S3(s) + 6HCl(aq) --> 2AlCl3(aq) + 3H2S(g), how many moles of HCl are used for each mole of AlCl3 formed? A.0 B.2 C.3 D.1 E.1.5 where do you start and how do you figure it out?
  3. Chem

    Question 11 Marks: 4 Consider the equilibrium of water with gaseous hydrogen and oxygen: Give the value of for this reaction, if it is written as: Choose one answer. a. -7.8 x 10^-16 b. -3.9 x 10^-16 c. 1.3 x 10^-15 d. 6.4 x 10^-14 e. 3.6 x 10^2
  4. chemistry

    What is the activation energy for a reaction whose rate is tripled by a temperature increase from 28 to 53 C? I understand that I have to use the arrhenius equation, but how do I set it up for a problem like this?
  5. Chemistry

    The rate constant fo a particular reaction increases by a factor of 6.5 when the temperature is increased from 300.0K to 310.0K. Calculate the activation energy.
  6. chemistry

    Use Hess's Law and a table of heats of formation to determine the enthalpy for the following reaction. 3SO2(g) + 3H2O(g) + 3/2O2(g) --->3H2SO4(l) ΔH = ?
  7. Chemistry

    Write the balanced chemical equation for the reaction of the weak acid HCN with water. Include the phase of each species.
  8. Chemistry

    In a coffee cup calorimeter, 50.00 mL of HNO3 (aq) and 50.00 mL of KOH(aq) were mixed. The temperature of the resultant solution increased 6.5 C. What is the Delta H of this reaction?
  9. physics

    find the initial velocity of a car stop in 10 second by applying breaks the reaction due to break is 2.5 metre per second square
  10. chemistry

    calculate the number of grams of Al2S3 which can be prepared by the reaction of 20g of Al and 30gm of sulphur. how much the non_limiting reactant in excess?
  11. chemistry

    What is delta Hrxm dagrees for the following chemical reaction? CO2(g)+2KOH(s) = H2O(g)+K2CO3(s) Express your answer in numerically, in kJ
  12. Chemistry

    Balance? Cr2O7^2- + C2H4O yields C2H4O2 + Cr^3+ (When I say ^ a number followed by a plus or minus that's the charge) Half-reaction method needed.
  13. Chemistry

    SO2(g) + O2(g) → SO3(g) What volume of sulfur dioxide gas reacts with 15.0 L of O2? The reaction conditions are 875°C and 1.00 atm pressure

    Na2CO3 write the hydrolysis reaction for the salts. Dissociate the salt into cation and anion and ignore inert species
  15. Chemistry

    In the reaction Ca(OH)2 + 2HCL -> CaCl2 + 2H2O: How many kilograms of H2O will be produced when 0.0948 Kg of Ca(OH)2 react with excess hydrochloric acid?
  16. Chemistry

    For the following chemical reaction... HCN (aq) + KOH (aq)----> H2O (l) + KCN (aq) write the net ionic equation, including the phases
  17. Chemistry

    Zinc reacts with hydrochloric acid according to the reaction equation... Zn (s) + 2HCl (aq) ---> ZnCl2 (aq) + H2 (g) How many milliliters of 5.00 M HCl (aq) are required to react with 5.55 g of Zn (s)??
  18. Chemistry

    The equilibrium constant for the reaction: 2NO(g)+Br2(g)2NOBr(g) Kc=1.3x10^-2 at 1000 Kelvin Calculate Kc for: NOBr(g)NO(g)+ 1/2Br2(g)
  19. Chemistry

    Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Cr2 ] = 0.875 M and [Ni2 ] = 0.0100 M. I keep on getting the answer .42 which is incorrect. Thank you so much in advance!
  20. chemistry

    write a balanced net ionic equation for the overall reaction represented by the cell notation below. Pt/ Fe2+, Fe3+ // I-/AgI/Ag
  21. Chemistry

    How much heat (in kilojoules) is evolved or absorbed in the reaction of 2.65 g of Na with H2O? 2Na+2H2O ---> 2NaOH + 2H2 Delta H= -368.4
  22. Chemistry

    1)In the reaction O2+2F2--> 2 OF2, F2 is the oxidizer. 2)F can't have positive oxidation states. Does 2 explains the reason for the 1st one or is it because because of F's higher electronegativity?
  23. HCA 220

    can someone explin how blood clotting, immune response, allergic reaction, and hormone release interrelate. I have been searching and can't find anything
  24. chemistry characterization & analysis of aspirin

    write a balanced equation that describes an acid base reaction that would allow you to determine the moles of aspirin present in a sample
  25. Chemistry

    How many moles of NaBH4 are needed to generate one mole of B2H6 if the reaction gives an 80% yield? 3NaBH4 +4BF3 ¨ 3NaBF4 + 2B2H6
  26. Chemistry

    What mass of precipitate will form if 1.50 L of concentrated Pb(ClO3)2 is mixed with 0.750 L of 0.170 M NaI? Assume the reaction goes to completion.
  27. chem 1411

    what mass of H2 is produced by the reaction of 118.5 mL of a 0.8775M solution of H3PO4 according to the following equation: 2Cr+2H3PO4= 3H2+2CrPO4
  28. Chemistry

    A student observed the following reaction: AlCl3(aq)+3NaOH(aq) -> Al(OH)3(s)+3NaCl(aq) After the products were filtered, which substances remained on the filter paper and why?
  29. Chemistry ( I NEED HELP REAL QUICK )

    How much Al is needed to react with 675 mL of 0.655M HCl solution according to the reaction => 2Al + 6HCl→2AlCl3+ 3H2 Help your friend!
  30. Chemistry

    Consider the following equilibrium at 395K: NH4HS(s) NH3(g) + H2S(g) The partial pressure of each gas is 0.265 atm. Calculate Kc for the reaction.
  31. science

    calculate the volume of gas at STP that is produced when 1g of silver nitrate is heated. the unbalanced reaction is: AgNO3(s)=Ag(s)+NO2(g)+O2(g)
  32. chem

    IF a reation generally takes 40 seconds to occur at 45 degrees C, how long should the reaction take a t the following temperatures? A. 35C B. 55C C. 65C
  33. Chemistry

    If a diagram describes an initial state of the reaction A2 + B2 --> 2AB. Would the picture with more AB products represent the result at the higher temperature?
  34. Physical Science

    Predict the shift of equilibrium for each of the following conditions in the following reaction involving gaseous reactants and products: N2 + 3H2 = 2NH3 + heat
  35. CHEM 1411

    What mass of Gallium chloride is formed by the reaction of 2.6 L of a 1.44 M solution of HCl according to the following equation: 2Ga+ 6HCl= 2GaCl3+3H2
  36. chem

    What volume of benzene (C6H6,d=0.88g/ml,molar mass=78.11g/mol) is required to produce 1.5 x 10^3 kJ of heat according to the following reaction?
  37. Chemistry

    What is the value of the equilibrium constant at 25°C for the reaction between each of the following? (a) Sn(s) and Pb2+(aq) (b) Cr(s) and Cu2+(aq) I have been unable to get either and have spent the last two hours attempting it. I have been using the
  38. Chemistry

    Please help !!!! Is anyone know what are two side reactions that could occur in the Diels-Alder Reaction of Cyclopentadiene with Maleic Anhydride in addition to the main product? Thanks
  39. Chemistry

    what mass of water will be formed by reaction of 3.50g of methylamine (8CH3NH2) with 15.0g of perchloric acid (13HClO4)? Answer is 99.1. How do you work this?
  40. organic chemistry

    If, by mistake, a chemist used 100% ethanol rather than diethyl ether as the reaction solvent, would the Grignard synthesis still proceed as expected?
  41. chemistry

    Express the rate of the reaction in terms of the change in concentration of each of the reactants and products. 2D(g)+3E(g)+F(g)>>>>2G(g) + H(g) when D is decreasing at 0.30 MOL/Ls, how fast is (H) increasing?
  42. Chemistry

    Write the net ionic equation for the reaction between sulfuric acid and potassium hydroxide. I got 2H^+ + 2OH^-1 ==> 2H2O. Is this correct?? Thanks.
  43. chemistry

    What volume of 16M HNO3 is required to dissolve 0.50g of Cu metal in the following reaction? Cu(s) + 4HNO3(aq) ---> Cu(NO3)2 + 2H2O + 2NO2
  44. ap chemistry

    Find the equilibrium constant for the reaction Cr(s) + Zn2+(aq)→Cr2+(aq) + Zn(s) if the standard cell emf is −0.76 V at the cathode and −0.91 V at the anode. RT - F= 0.025693 V
  45. Chm

    If we increased the amount of acetic acid and sodium bicarbonate to 2.0 moles, what effect would this have on the reaction? The enthalpy change? Explain
  46. Chemistry

    What happens if sodium acetate (CH3COONa) is added to the following reaction? CH3COOH  H+ + CH3COO- a) [H+] increases b) [H+] decreases c) a precipitate is formed d) [H+] does not change
  47. 7th grade

    A Pyrotechician is working on a new fourth of July rocket. He is using a highly reactive metal when burned. What can he use to lower the reaction rate????
  48. Chemistry

    In H2SO4 + 2NaOH = 2H2O + Na2SO4 How much of the excess reagent will remain after the reaction has been completed? I know that NaOH is the limiting reactant
  49. Chemistry

    For the reaction HCl + NaOH → NaCl + H2O, how many moles of hydrochloric acid are required to produce 281.0 g of water?

    1) How would you prepare 20 mL of a solution having pH = 2.00 by dilution of 0.10 M HCl? 2) The Ka, for hypochlorous acid, HClO, is 7.2 x l0^–4 at 25°C. What is pKa? Write the equation for the reaction to which Ka applies.
  51. chemistry

    In a certain chemical reation, two reactants undergo change to form two products. Why can't you determine what type of reaction occurred from this information?
  52. chemistry

    methane(g) +water= carbon monoxide(g)+Hydrogen (g) use the bond energies in the following table to predict the delta H foe the reaction
  53. chemistry

    What mass of precipitate will form if 1.50 L of concentrated Pb(ClO3)2 is mixed with 0.150 L of 0.190 M NaI? Assume the reaction goes to completion.
  54. organic chemistry

    what is the major and minor product of 3-methyl 1-pentene + propanol reacted with sulfuric acid?! Detailed mechanism reaction please?? Thank you!
  55. chemistry

    consider the following reaction: 2C2H6(g)+7O2 (g)-->4CO2(g)+6H2O (g) delta H = -3120kJ If 3.00g of ethane are burned, how many kJ of heat are produced?
  56. chemistry

    A sample of cesium metal reacted completely with water, evolving 47.0 mL of dry H2 at 31°C and 769 mmHg. What is the equation for the reaction?
  57. Chemistry 112

    Can someone please explain to me how to calculate reaction order with respect to something? I've read this in my textbook, and I watched videos on YouTube, but I still don't understand. Please help.
  58. Chemistry

    I need to know how to right a net ionic equation for the following chemical reaction: 5 H2C2O4 + 3 H2SO4 + 2 KMnO4 = K2SO4 + 2 MnSO4 + 8 H2O + 10 CO2
  59. chemistry

    if 15 grams of ethane gas c2h6, reacts with 128 g oxygen un a combustion reaction, how many moles of water can be produced?
  60. chemistry

    why would acyl halides give higher yields of amides compared to carboxylic acids or esters on reaction with NH3?
  61. chem

    Consider the chemical reaction, 2Al + 3Cl2 → 2AlCl3. Here, 56 g of Al can produce 415.14 g of AlCl3 (Molar masses: Al = 26.98 g; Cl = 35.45 g). true or false
  62. Chemistry

    For the following chemical reaction HCN(aq)+KOH(aq)--->H2O(l)+KCN(aq) Write the net ionic equation, including the phases.
  63. chemistry (DrBob222)

    A student fails to fill the cuvette 2/3 full with the reaction mixture ( CV+ and OH-). What effect does this error have on the measured absorbance values? Thank you :)
  64. chem

    For the reaction 2Cl2(g)+4NaOH(aq)->3NaCl(aq)+ NaClO2(aq)+2H2O(l) how many grams of NaCl can be produced from 30.8 g of Cl2 and excess NaOH?
  65. Chemistry

    Write a net ionic equation for the reaction that occurs when excess hydrobromic acid (aq) and sodium sulfide are combined.
  66. World History

    Generally peasants and the lower castes had a more positive reaction to the teachings of the Buddha, since Buddhists did not support the concept of a ________.
  67. Chemistry

    The first order reaction has a rate constant of 3.0x10^-3 s^-1. The time required for the r eaction to be 75% complete is: 95.8s 201s 231s 462s 41.7s
  68. Chemistry

    3NO2(g) + H2O(l) → 2HNO3(aq) + NO(g) standard enthalpy: -133.5 Find the change in internal energy for this reaction. Enter in kJ.
  69. organic chemistry

    assuming the reaction goes to completion, calculate the volume of 6M KOH needed to completely neutralize all of the hydrogen bromide formed.
  70. chemistry

    Al2O3(s)+6NO(g)---->5N2(g)+6H2O(l) how many grams of Nitric Oxide are required to produce 145g of nitrogen in the following reaction?
  71. Chemistry

    A reaction at 2.43 atm produces 20.0 L of a gas and evolves 75.3 kJ of heat (exothermic). Calculate the change in internal energy of the system (in kJ).
  72. Chemistry

    When you mix sodium bicarbonate and calcium chloride with bromothymol (and indicator that changes color when a chemical reaction occures) what does it create?
  73. chemistry

    Read the scenario. Hydrogen chloride (HCl) and potassium hydroxide (NaOH) react. What products are formed from this reaction?
  74. chemistry

    what is a titration, what is the type of reaction to find the volume of hydrochloric acid needed to react with 25 of potassium hydroxide solution
  75. science

    identify the type of reaction when hydrogen sulphide gas burns in oxygen to give water and sulphur dioxide

  77. chemistry

    What is the molarity of ZnCl2 that forms when 19.0 g of zinc completely reacts with CuCl2 according to the following reaction? (Assume a final volume of 195 .)
  78. chemistry

    Zinc reacts with hydrochloric acid according to the reaction equation Zn(s)+2HCL(aq)=>ZnCl2(aq)+H2(g). How many mm of 1.50M HCL(aq) are required to react with 9.05 g of ZN?
  79. APChem

    does anyone know a good website i could look at so i could answer this question: ? Explain how indicators work using a chemical reaction as part of your explanation. Any websites? please? thank you!!
  80. Genral Science

    What C word defines a substance that speeds a chemical reaction without being consumed? http://en.wikipedia.org/wiki/Catalysis
  81. chemistry

    write a balanced chemical equation for the process of photosynthesis and the conditions of the reaction giving physical state of all the substances
  82. Chemisty

    The value of ∆Ho for the reaction below is -1107 kJ: 2Ba(s) + O2(g) → 2BaO(s) How many kJ of heat are released when 15.75 g of Ba(s) reacts completely with oxygen to form BaO(s)? A) 35.1 B) 114 C) 70.3 D) 20.8 E) 63.5
  83. Biology

    Action potentials: Tick the box next to the ONE answer you believe is TRUE. A. compound action potentials increase in amplitude as the stimulus strength is increased. B. ONE action potential takes in the order of 1-2 seconds to be observed. C. generation
  84. math/probability

  85. Chemistry

    one morning you are given 3 test tubes of aqueous solutions of compound X: the "A" tube was set up as unsaturated, while "B" was set up as Saturated in a beaker, then poured of into the tube, and "C" was carefully set up as supersaturated. At lunchtime,
  86. writing

    Combines the pairs of sentences below into compound sentenvces three different ways. Punctuate correctly. One pair of sentences should not be joined because the ideas are not related. So can you tell me if the sentences are correct. I have to use a fanboy,
  87. Chemistry

    -CORRECTION- N2 + O2 --> 2 NO change in heat (delta H)= 43.2 kcal based on the reaction, which statement is true? a) 43.2 kcal are consumed when 1.00g of O2 reacts b) 43.2 kcal are consumed when 1.00g of N2 reacts c) 43.2 kcal are consumed when 1.00g of NO
  88. Physics

    Bar BC in the figure has length L, constant cross sectional area A, and is composed of a homogeneous material with modulus E. The bar is fixed between walls at B (x=0) and C (x = L). The bar is subjected to a variable distributed load per unit length,
  89. strength of materials

    Bar BC in the figure has length L, constant cross sectional area A, and is composed of a homogeneous material with modulus E. The bar is fixed between walls at B (x=0) and C (x = L). The bar is subjected to a variable distributed load per unit length,
  90. chemistry

    Could someone help me with these problems? 1. Why is it advantageous to choose a solvent with a large value for k(fp)? I don't really know 2. Why is it not necessary to wait for an entire sample of water to freeze in order to determine its freezing point?
  91. 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.
  92. 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
  93. chemistry

    In my chemistry lab we decomposed lead (iv) oxide by heating it and then placing a wooden splint(test the evloved gas) into the mouth of the test tube. The color changed into red lead ( Pb304).Then we reheated the sample again and it turned to PbO. I do
  94. 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
  95. chemistry

    The formula for epsom salt is MgSO4 . 7H20 If 1.250 g of the compound is dissolved in water, calculate the number of milliliters of .200 M Ba(NO3)2 that would be required to precipitate all of the sulfate ions as barium sulfate. I got that right with an
  96. english desperate

    please help: are these compound or simple sentence the boat nosed up to the dock; our trip was finally over. several people listened, but nobody volunteered. shelia calls it a dragon fly; I call it a darning needle. THESE all seem like compund sentences -
  97. Englis

    Use a joining word to combine the simple sentences to make a compound sentence. 1/ Jack and the Beanstalk" is a fable. It is very famous. 2/ the beanstalk grew into the sky . Jack climbed it anyway. 3/ Jack climbed the beanstalk . He found a pot of gold.

    In TLC, why do you spot multiple times? Select one or more correct answers. A. To fill the capillary almost instantly by capillary action. B. So the developing chamber solvent does not evaporate. C. The higher compound concentration facilitates
  99. Chemistry

    I have a compound of Na2subscriptCO3subscript. The cation it breaks into is NA+1 in the upper righthand corner, and the anion is CO3subscript,-2in the upper right hand corner. Where did the anion numbers come from? How can you tell what the charge is? I
  100. chemistry Dr. BOB

    A voltaic cell has one half-cell with a Cu bar in a 1.00 M Cu2+ salt and the other half-cell with a Cd bar in the same volume of a 1.00 M Cd2+ salt. Report your answers to the correct number of significant figures. a)Find E degree cell, delta G degree ,