1. organic chemistry

    How would using sodium fluoroacetate instead of sodium chloroacetate affect the reaction? This experiment was to synthesis of plant hormone. and If sodium iodoacetate is used instead of sodium chloroacetate, how will the rate of reaction be affected?

    asked by tweety on January 24, 2010
  2. Chemistry

    A 5.00L reaction vessel is filled with 1.00mol of H2, 1.00mol of I2, and 2.50mol of HI. If equilibrium constant for the reaction is 129 at 500k, what are the equilibrium concentrations of all species? H2(g) + I2(g) 2HI(g) Kc = 129

    asked by Presh on March 16, 2013
  3. chemistry

    What is the rate of the following reaction (M/s) if the rate constant for the reaction is 0.500 L•mol-1•s-1 and the concentration of each reactant is 0.0628 M. (The units for the rate constant depend upon the rate law). CO + NO2 --> CO2 + NO

    asked by Confused on November 20, 2010
  4. chemistry

    are these endothermic or exothermic? 2H2O2 (l) ¨ 2H2O(l) + O2(g) ∆H = -190 kj C(s) + H2O (g) ¨ CO (g) + H2 (g) ∆H = +113 A negative delta H means the heat is given up by the reaction. A + delta H means the heat is added to the reaction. thanks

    asked by key on February 5, 2007
  5. Chemistry

    Na (s) + 1/2F2 (g) = 2NaF (s) Are the reactants at higher or lower energy than the products and is the reaction endothermic or exothermic? I feel that the reaction is exothermic, but can't determine higher or lower enery?

    asked by Bran on May 12, 2012
  6. HELP-CHEMISTRY!

    Na (s) + 1/2F2 (g) = 2NaF (s) Are the reactants at higher or lower energy than the products and is the reaction endothermic or exothermic? I feel that the reaction is exothermic, but can't determine higher or lower enery?

    asked by Bran on May 12, 2012
  7. chemistry

    Magnesium nitride is formed in the reaction of magnesium metal with nitrogen gas in this reaction: 3 Mg(s) + N2(g) --> Mg3N2(s) How many grams of product are formed from 2.0 mol of N2 (g) and 8.0 mol of Mg(s)? i havent been able to figure this one out, can

    asked by louren on March 29, 2016
  8. Chem11

    The reaction 2 COF2(g)--> CO2(g) + CF4(g) has Kp = 2,001,051 at a certain temperature. What would be the value of Kp for the related reaction: 3 CO2(g) + 3 CF4(g)--> 6 COF2(g)? (Enter your answer in scientific notation, e.g. 5.46e-17.)

    asked by Ryan on May 2, 2011
  9. chemistry

    Calculate the value of the equilibrium constant (Kp) for the reaction shown, if F(g) was found to be 96.80 % decomposed at 1000 K when its initial pressure was 4.638 atm. The initial pressure of the reaction products is 0 atm. 2F(g) = F2(g)

    asked by andy on April 8, 2010
  10. college chemistry

    If the initial concentration of F(g) is 8.285 mol/L, calculate the % decomposition of F(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kc at 927.0 °C is 370.00. The initial concentration of the reaction products

    asked by sparkle on October 3, 2010
  11. college chemistry

    please help! If the initial pressure of I2(g) is 1.738 atm, calculate the % decomposition of I2(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kp at 1000 K is 0.254. The initial pressure of the reaction products

    asked by sparkle on October 5, 2010
  12. chem

    If the initial pressure of HD(g) is 2.270 atm, calculate the % decomposition of HD(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kp at 727.0 °C is 0.26. The initial pressure of the reaction products is 0 atm.

    asked by BOB on September 30, 2011
  13. Calculus

    Perform the indicated operations and simplify the result. Leave your answer in factored form. 4+(4/x)/4-(4/x) Give the answer in the form Ax+B/Cx+D is the answer x+4/x-4

    asked by George on August 26, 2008
  14. Algebra

    I have to find the equation for the line that passes through (4,3) and (6,2) How would I solve this. Into point slope form Into slope intercept form I got the slope each is -1/2 then I got y=-1/2x + b How would I get b?

    asked by Amy~ on August 31, 2010
  15. chemistry

    What is the molecular structure of the molecule AlCl3? What characteristic is notable about the structure that helps us to understand the acidic nature of AlCl3?Write a chemical reaction between AlCl3 and NH3 ignoring any reaction between AlCl3 and the

    asked by kiki on February 23, 2010
  16. Chemistry

    6Li(s) + N2(g) 2Li3N(s) a) What mass of lithium is required to produce 0.575 g of Li3N in the balanced reaction? b) What mass of nitrogen is required for the reaction? ------------------------------------------- I tried dimensional analysis in a couple

    asked by Brian on March 8, 2015
  17. chemistry

    A definite amount of NH4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reactant mixture containing excess of naoh was neutralized with 12.5ml of 0.75N nh2s04. Calculate the amount of nh4cl taken. The answer 3.78g who

    asked by Fai on February 10, 2013
  18. Chemistry

    Suppose you tired to carry out a double-replacement reaction by mixing together equal volumes of a solution that contained dissolved NaF and a solution that contained dissolved NaCl. Would you expect a reaction, if so write the balanced chemical equation?

    asked by Anonymous on April 25, 2011
  19. Chemistry- practice question

    The answer for this question is ΔHrxn=-441.40174468085 kJ/mol but I don't know how to arrive to that answer. 0.47g of magnesium reacts with 100ml of 1.00 mol/L HCl in the following reaction: Mg(s)+2HCl(aq)-->MgCl2(aq)+H2(g). The heat of reaction is

    asked by Liz on August 1, 2014
  20. Chemistry

    In a certain reaction, 300.23 grams of solid aluminum sulfide combine with unlimited aqueous silver nitrate. How many moles of aluminum sulfide react? How many moles of each product will be produced? First of all, is the reaction a double replacement or

    asked by Paula on December 7, 2009
  21. Honors Chemistry

    What is the molecular structure of the molecule AlCl3? What characteristic is notable about the structure that helps us to understand the acidic nature of AlCl3?Write a chemical reaction between AlCl3 and NH3 ignoring any reaction between AlCl3 and the

    asked by HonorsChemistryKid on February 23, 2010
  22. physics

    A ranger in a national park is driving along at 17.9 m/s when a deer jumps into the road 65. m ahead of the vehicle. After a reaction time of t seconds, the ranger applies her brakes, which produce an acceleration of -2.8 m/s2. What is the maximum reaction

    asked by tyler on August 21, 2012
  23. NEED HELP WITH CHEM HW

    Ethanol (C2H5OH) is synthesized for industrial use by the following reaction, carried out at very high pressure. C2H4(g) + H2O(g) C2H5OH(l) What is the maximum amount of ethanol (in grams) that can be produced when 2.2 kg of ethylene (C2H4) and 0.014 kg of

    asked by Anonymous on October 1, 2011
  24. Chemistry

    Balanced equations..done? Is each reaction a redox reaction? For those reactions that are redox reactions, I must identify the substance being oxidized and the substance being reduced... (a) Zn(s) + CoCl2 (aq) ---> ZnCl2 (aq) + Co(s) (b) HI(aq) + NaOH(aq)

    asked by MD on June 29, 2014
  25. chemistry

    Sulphuryl chloride, SO2Cl2, decomposes according to the following first-order reaction: SO2Cl2(g) ¨ SO2(g) + Cl2(g) At a certain temperature, it is observed that it takes 147 minutes for 23.0% of the sulphuryl chloride to react. Calculate the half-life

    asked by matt on March 23, 2008
  26. Chemistry

    Suppose you tired to carry out a double-replacement reaction by mixing together equal volumes of a solution that contained dissolved NaF and a solution that contained dissolved NaCl. Would you expect a reaction, if so write the balanced chemical equation?

    asked by Keely on January 29, 2015
  27. Chemistry

    A 100 L reaction container is charged with 0.782 mol of NOBr, which decomposes at a certain temperature** (say between 100 and 150 oC) according to the following reaction: NOBr(g) ↔ NO(g) + 0.5Br2(g) At equilibrium the bromine concentration is 1.42x10-3

    asked by JOhn Boku on February 22, 2015
  28. Spanish please help

    I have no idea how to do these. Will somebody please help. Thank you so much. 3. Fill in the blank with the correct verb form: yo/pensar. Yo __________ 4. Fill in the blank with the correct verb form: ella/entender. ella __________ 5. Fill in the blank

    asked by Michael on February 14, 2013
  29. Math! Please Help!

    1. What is the simplified form of (–3x^3y^2)(5xy^–1)? I think it is 15x^4y 2. What is the simplified form of –9m^–2n^5 × 2m^–3n^–6? I have no idea on this one. :/ 3. A rectangular pasture has a fence around the perimeter. The length of the

    asked by Electro on January 15, 2014
  30. Algebra 1

    I've tried so hard on this and I'm completely hopeless, can somebody help me out? Please it would mean a lot. Task 1 find the rate of change for each table, equation, or graph. How did you find the rate of change? Task 1 A. X 2 4 6 Y 10 20 30 Rate of

    asked by Alexandra on December 20, 2014
  31. Chemistry

    A half-cell that consists of a copper wire in 1.00 M CuNO3 solution is connected by a salt bridge to a half cell containing a 1.00 M X(II) acetate solution and an electrode of metal X. The voltage of the cell is 2.00 V, with metal X as the positive

    asked by JUNDY on April 12, 2015
  32. Chemistry

    In a reaction vessel, 500. mL of 0.100 M Na3PO4(aq) is combined with 200. mL of 0.400 M Pb(NO3)2(aq). (a) Write the molecular equation for the reaction that occurs. Balance the equation using lowest whole numbers and be sure to include states. (b) Identify

    asked by ya boy on May 2, 2016
  33. Chemistry

    Write balanced net ionic equations for the precipitation reactions that occur when the following solutions are mixed. If no reaction occurs, write "no reaction" a) silver nitrate and lithium hydroxide b) ammonium sulfide and cobalt (II) bromide I'm

    asked by Kanade on April 24, 2018
  34. Chem- REALLY URGENT!!!

    2. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions: •

    asked by Taylor on December 19, 2012
  35. Please help me!!!!

    2. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions: •

    asked by Taylor on December 19, 2012
  36. Chem Help please!!!!!

    2. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions: •

    asked by Taylor on December 19, 2012
  37. Chemistry

    Consider a chromium-silver voltaic cell that is constructed such that one half-cell consists of the chromium, Cr, electrode immersed in a Cr(NO3)3 solution, and the other half-cell consists of the silver, Ag, electrode immersed in a AgNO3 solution. The two

    asked by TP on May 12, 2014
  38. Chemistry (DUE TONIGHT)

    A possible reaction for converting methanol to ethanol is: CO(g) + 2H2(g) + CH3OH(g) -----> C2H5OH(g) + H2O(g) I completed parts A-C correctly, and found the following info: delta H = -165.6 kJ delta S = -227.4 J/K delta G = -97.9 kJ The next question is

    asked by LC on July 15, 2016
  39. CHEMISTRY

    Consider the following reaction: 2H2S+SO2=S(s)+H2O A reaction mixture initially containing 0.500M H2S and 0.500M SO2 was found to contain 1.0×10−3M at a certain temperature. A second reaction mixture at the same temperature initially contains 0.255M H2S

    asked by bf on February 14, 2010
  40. Chemistry

    The reaction through which carbon changes from graphite to diamond form is represented by the equation C(graphite) ---> C(diamond) delta H: ? Using the reactions below, determine the amount of heat absorbed in the change of one mole of graphite to one mole

    asked by Rose on April 5, 2016
  41. Adv AP Honors Chemistry

    2. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions: •

    asked by Taylor on December 19, 2012
  42. Chemistry ASAP

    3. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2  HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions: •

    asked by Moe on January 18, 2013
  43. Science/Chemistry

    Write a Balanced equation for the chemcial reaction Acetylene gas (C2H2) burns in a welding torch with oxygen to form carbon dioxide gas and water vapor. C2H2(g) + O2(g) ==> CO2(g) + H2O(g) It isn't balanced. I will leave that for you. How do i balance it?

    asked by Chris on March 15, 2007
  44. Chemistry

    Use the Bronsted-Lowry definitions to identify the two conjugate acid-base pairs in the following acid-base reaction: H20 + H20 H30^+ + OH^- Let's see what you think on this after the previous post. Just remember, the acid is the one that HAS the H and the

    asked by Raj on May 26, 2007
  45. organic chemistry

    Michael & Aldol Condensation Reaction We are preparing an a,b-unsaturated ketone via Michael and aldol condensation reactions. The reactants are trans-chalcone and ethyl acetoacetate (in ethanol and NaOH). This creates

    asked by Anonymous on September 29, 2011
  46. organic chemistry

    Michael & Aldol Condensation Reaction We are preparing an a,b-unsaturated ketone via Michael and aldol condensation reactions. The reactants are trans-chalcone and ethyl acetoacetate (in ethanol and NaOH). This creates

    asked by Anonymous on September 29, 2011
  47. organic chemistry

    Michael & Aldol Condensation Reaction We are preparing an a,b-unsaturated ketone via Michael and aldol condensation reactions. The reactants are trans-chalcone and ethyl acetoacetate (in ethanol and NaOH). This creates

    asked by Anonymous on September 29, 2011
  48. chemistry

    The following data were obtained at 25° C for the reaction [1+2+2] C2H5Br + OH- C2H5OH + Br- Determine the rate law for the reaction from these data. [C2H5Br] [OH-] Rate 0.150 0.200 4.8 x 10-5 0.300 0.200 9.6 x 10-5 0.450 0.200 14.4 x 10-5 0.300 0.600

    asked by ranu on February 8, 2012
  49. Chemistry

    I want to know the enthalpy change for this reaction which occurs in a blast furnace: Fe2O3(s) + 3C(s) --> 2Fe(l) + 3CO(g) You will need the heat of formation for CO, and ironIIIoxide, and the heatofmelting for iron. I suspect you have some temperature in

    asked by Alice on April 15, 2007
  50. Chemistry

    The following is given: 20 ml of HCl (2.0 M) added with 5 ml of Na2S2O3 (0.3 M) with 5 ml of H2O S2O3^-2(aq) + 2H^+1 (aq) --> S (s) + SO2 (g) + H2O (l) Calculate the following: a) Reaction rate when 30 mg of sulphur is formed (in 30 ml of solution) after

    asked by Stephanie on October 20, 2010
  51. Chemistry

    Suppose a compound is involved in three different reactions denoted R1, R2, and R3. Tripling the concentration of this reactant in all three reactions causes the rates of reaction to increase by factors of 3, 9, and 1, respec- tively. What is the order of

    asked by Mitch on May 1, 2010
  52. chemistry

    A definite amount of nh4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reactant mixture containing excess of naoh was neutralized with 12.5ml of 0.75N nh2s04. Calculate the amount of nh4cl takedn The answer 3.78g who

    asked by Fai on February 10, 2013
  53. Chemistry

    A reaction requires 0.5 g of pure methyl oleate (density = 0.87g/mL) (MW = 310g/mol). How many mL of 70% pure methyl oleate are needed for the reaction. I don't exactly know how to start this off. I think what I'm supposed to do is multiply the 70% by the

    asked by Anthony on December 2, 2014
  54. college chemistry

    The voltaic cell described by the balanced chemical reaction has a standard emf of 4.05 V. Calculate the equilibrium constant (Kc) for the reaction at 25 oC. Round your answer to 3 significant figures. F2(g) + Mn(s) → 2F-(aq) + Mn2+(aq) Mn2+/Mn -1.18

    asked by sparkle on December 2, 2010
  55. chemistry

    a 35.6g sample of ethanol (c2h5oh) is burned a bomb calorimeter, according to the following reaction. If the temperature rose from 35.0 to 76.0c and the heat capacity of the calorimeter is 23.3kj/c what is the value of enthalpyH reaction? the molar mass of

    asked by and6260 on July 27, 2013
  56. ukm

    The equilibrium constant (Kc) for the gas phase reaction 2 NH3 --> N2 + 3 H2 is 3 x 10-3 at some temperature. The reaction is started by placing a sample of ammonia in an empty one liter flask. When equilibrium is established there is 0.010 mole of N2

    asked by Anonymous on January 8, 2012
  57. chem

    Consider the reaction: C3H8(g) + 5 O2(g) ® 3 CO2(g) + 4 H2O(g), where DH = – 531 kcal/mol. Which statement is true? A.Heat is absorbed. B.The bonds formed in the products are stronger than the bonds broken in the reactants. C.The products are higher in

    asked by steve on March 21, 2012
  58. APCHEm urgent!!!!!!

    Hi thank you so much!!!! What is a net ionic equation for the reaction of H+ with Cu(NH3)4 ^2+ ALSO what is the net ionic equation for the reaction of H+ with Hg2Cl2 Does the H+ addition increase, decrease, or has no impact on the solubility of the salt.?

    asked by Kiki on March 15, 2010
  59. ap chemistry

    Consider the following unbalanced reaction. P4(s) + F2(g) PF3(g) How many grams of F2 are needed to produce 212 g of PF3 if the reaction has a 79.8% yield? I did 212/.798=265.66 grams do I convert that to moles next?

    asked by Kris on August 1, 2013
  60. chemistry

    A 0.100 mol sample of H2S is placed in a 10.0 L reaction vessel and heated to 1132°C. At equilibrium, 0.0285 mol H2 is present. Calculate the value of Kc for the reaction below at 1132°C. 2 H2S(g) 2 H2(g) + S2(g)

    asked by Brittany on January 31, 2011
  61. chemistry

    What is the purpose of a calorimeter? A. To determine the temperature of a chemical reaction B. To determine the energy changes of a chemical reaction C. To identify the specific temperature of an unknown substance I think the answer might be c

    asked by Morgan on November 22, 2014
  62. Chemistry

    In a combination reaction, 2.22 g of Magnesium is heated with 3.75 g of Nitrogen a) which reactant is present in excess? b) how many moles of product are formed? c) after reaction, how many grams of each reactant and product are present?

    asked by Saige on October 10, 2011
  63. Chemistry

    The quantity of antimony in an ore can be determined by an oxidation-reduction titration with an oxidizing agent. The ore is dissolved in hot, concentrated acid and passed over a reducing agent so that all the antimony is in the form Sb3 (aq). The Sb3 (aq)

    asked by Anon on December 2, 2012
  64. Chemistry

    The quantity of antimony in an ore can be determined by an oxidation-reduction titration with an oxidizing agent. The ore is dissolved in hot, concentrated acid and passed over a reducing agent so that all the antimony is in the form Sb3 (aq). The Sb3 (aq)

    asked by Anon on December 3, 2012
  65. Chemistry

    For a particular redox reaction NO is oxidized to NO3^- and Cu^2+ is reduced to Cu^+ . Complete and balance the equation for this reaction in basic solution. We are given this as a guide to start NO + Cu^2+ --> NO3^- + Cu^+ I started with: Cu^2+ + 2e- -->

    asked by Heather on April 9, 2014
  66. chemistry

    you work for a company that makes ammonia,NH3, which is an important compund needed in the manufacture of fertilizers. Ammonia is produced by the following reaction: N2 + 3H2 -----------> 2NH3(g) on the basis of what you have discovered in this experiment,

    asked by Z.......... on May 12, 2010
  67. A.P Chemistry

    For a certain reaction ∆H is 54 kJ/mol and ∆S is 128 J/mol · K. This reaction can become spontaneous only above some temperature. What is this temperature? Answer in units of ◦C.

    asked by Rachel on March 19, 2017
  68. chemistry

    In an exothermic reaction, delta H was found to be -40 kJ, and the activation energy to be 30 kJ. What would be the activation energy of the reverse reaction?

    asked by amanda on December 30, 2011
  69. CHEMISTRY

    8) The reaction CH3- N≡C → CH3- C≡N is a first-order reaction. At 230.3°C, k = 6.29 x 10^-4 s^- 1. If [CH3 -N≡ is 1.00 x 10^-3 initially, C] [CH3-N ≡ C] is __________ after 1.000 x 10^3 s. A) 5.33 x 10^-4 B) 1.00 x 10^-6 C) 4.27 x 10^-3 D) 2.34

    asked by JES on October 23, 2010
  70. Chemistry

    Ni2+(aq)+Mg(s)→Ni(s)+Mg2+(aq) Indicate the half-reaction occurring at Anode. Indicate the half-reaction occurring at Cathode.

    asked by John on May 14, 2014
  71. rate constant

    A reaction has a rate constant of 1.25×10−4 at 28 and 0.227 at 77. Determine activation barrier for reaction What is the value of the rate constant at 18?

    asked by charlie on February 10, 2013
  72. chemistry

    Consider the reaction 2 X2Y+Z2 ⇌ 2 X2YZ which has a rate law of rate= k[X2Y][Z2] Select a possible mechanism for the reaction.

    asked by Tayebeh Asadi on January 28, 2016
  73. Chemistry

    Does the reaction rate of a zero order reaction becomes half of its initial value,if the concentration of the reactant becomes half of its initial value?

    asked by Josh on August 17, 2017
  74. science experiment

    why will an eggshell dissolve in the acetic acid of vinegar and not the phosphoric acid of coca cola? Acetic acid reacts with the egg shell, primarily made of calcium carbonate, CaCO3, to form CO2 and calcium acetate. Vinegar is roughly 4-6% acetic acid.

    asked by rishi on January 29, 2007
  75. chem

    For the reaction 3NO2 + H2O  2HNO3 + NO, how many grams of HNO3 can form when 1.00 g of NO2 and 2.25 g of H2O are allowed to react? This is a limiting reagent problem. 1. Write the equation. You have done that and it is balanced. 2. Convert 1.00 g NO2 and

    asked by meghan on February 28, 2007
  76. Math: Please check my answers

    1. What is the degree of the monomial 3x2y3? 2 3 5 6 2. What is the simplified form of 8b3c2 + 4b3c2? 12bc 12b3c2 12b6c4 12b9c4 3. What is the simplified form of (4j2 + 6) + (2j2 – 3) ? (1 point) (0) 6j2 – 3 (1) 6j2 + 3 (0) 6j2 + 9 (0) 4j4 + 3 4. What

    asked by Deborah on January 28, 2013
  77. Chemistry

    OK I just need help with two final problems that I am stuck on: The problem states the calcium carbonate in limestone reacts with HCl to produce a calcium chloride solution and carbon dioxide gas CaCO3(s)+2HCl(aq)-->CaCl2(aq)+H2O(l)+CO2(g) 1)Find how many

    asked by TT on December 9, 2010
  78. Science

    Traffic in the cities releases NOx gases into the atmosphere (in the form of NO and NO2). NOx gases contribute to rainwater acidification by dissolving and transforming into a strong acid (HNO3, nitric acid) according to the reaction below: 4 NO + 3 O2 + 2

    asked by karem on December 21, 2016
  79. chemistry

    A classic experiment in equilibrium studies dating from 1862 involved the reaction in solution of ethanol and acetic acid to produce ethyl acetate and water. The reaction can be followed by analyzing the equilibrium mixture for its acetic acid content. In

    asked by gs on March 13, 2011
  80. chemistry

    #2) Consider the preciditation reaction of a solution containing 3.50 grams of sodium phosphate mixed with a solution containing 6.40 grams of barium nitrate. How many grams of Barium phosphate can form? Ba(NO3 )2 + Na3 PO4 yields Ba3 (PO 4 )2 + NaNO3 #2b)

    asked by lyne on January 29, 2009
  81. Use of "facile"

    Could someone please explain to me how facile differs form easy. and is the word facile used correctly in this sentence( excerpt form my essay) "He ultimately does not kill Popé; nonetheless, though it is not explicitly stated that John acted

    asked by ME on May 30, 2009
  82. chemistry

    The amount of lactic acid, HC3H5O3, produced in a sample of muscle tissue was analyzed by reaction with hydroxide ion. Hydroxide ion was produced in the sample mixture by electrolysis. The cathode reaction is given below. 2 H2O(l) + 2 e ‾ → H2(g) + 2

    asked by Long on May 3, 2010
  83. Organic Chemistry

    The purpose of adding concentrated H2SO4 to the Diels-Alder adduct was to: A. hydrolyze the product to make the product precipitate more easily B. catalyze the diels alder reaction C. use Le Chatelier’s principle to drive the reaction to completion D. to

    asked by nilee on March 6, 2009
  84. Chemistry

    Oxy acetylene welding uses acetylene gas which is produced by the reaction of CaC2 with water. It also produces calcium hydroxide as a by product.Calculate the volume in liters measured at 27°C and 965 torr that would be produced from the complete

    asked by Vaidehi on August 30, 2016
  85. Chemistry

    A total of 2.00 mol of a compound is allowed to react in a foam coffee cup that contains 141 g of water. The reaction caused the temperature of the water to rise from 21.0 to 24.7 degrees Celsius. What is the enthalpy of this reaction? Assume that no heat

    asked by Karen on October 11, 2010
  86. Chemistry

    What mass of copper(II) nitrate would be produced from the complete reaction of 65.3 g of copper, according to the chemical reaction shown below? Cu + 2 AgNO3 ----> Cu(NO3)2 + 2 Ag Use the masses to two decimal places using the periodic chart in the front

    asked by Kristin on October 18, 2013
  87. Chemistry

    Write the dissociation reaction and the corresponding Ka equilibrium expression for each of the following acids in water. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer. Omit water in your answer.) (a)

    asked by Chris on March 3, 2012
  88. Science

    Equation for the reaction which took place: Hydrochloric acid + calcium carbonate -> calcium chloride + carbon dioxide + water When the reaction stopped the total mass had decreased from 102.5g to 101.4g. some water had evaporated from the beaker what else

    asked by afghandon on June 29, 2014
  89. science/ chemistry

    Over 80 000 vehicles per day pass the site and the traffic is frequently congested. The surrounding area is described as forming a street canyon. The temperature at the site had reached 25 °C by 08:00, when the ethane concentration was recorded as 7.09

    asked by Nicolas on September 14, 2008
  90. Chemistry Problem

    Diiodine pentafluoride reacts spectacularly with bromine trifluoride to form iodine pentafluoride, oxygen gas, and liquid bromine. In a particular reaction a 44.00g sample of I2O5 reacts with 58.00g BrF3. What is the mass of the excess reagent? This is

    asked by nns40760 on December 2, 2014
  91. chemistry

    Consider the following reaction: CH3X + Y  CH3Y + X At 25oC, the following two experiments were run, yielding the following data: Experiment 1 : [Y]0 = 3.0 M [CH3X] Time(hr) 7.08 x 10-3M 1.0 4.52 x 10-3M 1.5 2.23 x 10-3M 2.3 4.76 x 10-4M 4.0 8.44 x

    asked by Katie on January 6, 2014
  92. algebra

    This is a problem about logarithms: I'm completely confused as to what to do here: The logarithmic form of 84 = 4,096 is log8 4,096 = 4 Write the logarithmic form of x5 = the value of this quantity Explain the steps of conversion.

    asked by Vilma on June 26, 2012
  93. chemistry

    How many grams of carbon dioxide can form when a mixture of 3.60 g ethylene (C2H4) and 2.70 g of oxygen is ignited, assuming complete combustion to form carbon dioxide and water?

    asked by me on January 25, 2012
  94. Science

    1.00g of oxygen combine with 0.126 g of hydrogen to form H2O. 1.00 g of nitrogen combie with 0.216 g of hydrogen to form ammonia. Predict the weight of oxygen

    asked by RAJESH on July 9, 2017
  95. Statistics

    When creating histograms, which is true statement? a) Form classes of equal width b) Alwyas form frequency groups that do not overlap c) Establish between five and 15 frequency groups d) All of the above.

    asked by Anonymous on November 8, 2013
  96. Science

    How two neutral objects may become positively and negatively charges? How is atomic mass established? Which atoms will form covalent bonds and which atoms will form ionic bonds?

    asked by Trissy on January 14, 2008
  97. Algerbra

    Write the equation of the circle in standard form. Find the center, radius, intercepts, and graph the circle. x2+y2+16x−18y+145=25 Standard form (x-h)^2 +(y-k)^2 k

    asked by Jackie on June 12, 2013
  98. Algebra 2

    Hey I am working on math homework that involves "Standard Form to Vertex Form by Averaging." My class is just starting to learn this today, but I am totally lost still on what to do. Can you please help? The formula for this is y=a(x - h)^2 + k the h is

    asked by Tessa on February 8, 2010
  99. chemistry

    if you have one mole of CH3CH3(g) + 2 moles of Cl2 (g) and form one mole of C2H4Cl2 (l) + 2 moles of HCl (g) assuming a 90% yield calculate the amount of each reactant needed to form 1.5 kg of product

    asked by noell on August 30, 2010
  100. geometry

    Plot the points (2,4), (-1,4) and (2,1) and connect them to form a triangle. What rule would you use to translate the triangle 5 units to the right? Write your rule in the form H(x,y) = (?,?). Draw the translated figure and label its coordinates

    asked by Anonymous on February 6, 2012