1. physics

    if the reaction time is 10.0s, how far will the car travel before hitting the brakes? Vf = 27.42 m initial speed = 80 km/hr coefficient of friction = 1.00

    asked by jb on June 25, 2012
  2. chemistry

    find mass of sulfuric acid obtained in reaction of 20.0g if sulfur trioxide with excess of water

    asked by Allison on March 10, 2015
  3. chem

    Please explain: 1) if MnO2 when in a fast reaction with H2O2 appear in balanced equation and 2)purpose of manganese dioxide. Thanks

    asked by bell on April 25, 2015
  4. Chem - Stoichiometry

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

    asked by Erin on October 18, 2009
  5. Chemistry

    How much heat (in kilojoules) is evolved or absorbed in the reaction of 3.35 of with enough carbon monoxide to produce iron metal?

    asked by LaK on December 11, 2012
  6. 11th grade physics

    if action and reaction are always equal and opposite, why don't they always cancel each other and leave no force for acceleration of the body?

    asked by help on November 8, 2010
  7. physics

    Determine the stopping distances for a car with an initial speed of 93 km/h and human reaction time of 3.0 s for the following accelerations: -4.00 m/s^2 -8.00 m/s^2

    asked by Phil on August 19, 2011
  8. 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

    asked by Chem on May 8, 2010
  9. Chemistry

    In the first order, reaction A yields products, A=0.400M initially and 0.250M after 15.0 min. What is the value of the rate constant, k?

    asked by Jeremy on January 21, 2013
  10. O-CHEM

    Formic acid is only readily soluble in water and in both 0.6 M NaHCO3 and 2.5 M NaOH. give a brief explanation of the reaction for each

    asked by Nina on February 4, 2009
  11. Chemistry

    Formic acid is only readily soluble in water and in both 0.6 M NaHCO3 and 2.5 M NaOH. give a brief explanation of the reaction for each

    asked by Nina on February 4, 2009
  12. health care

    how are the processes of blood clotting, immune response, allergic reaction, and hormone release interrelated?

    asked by patti on April 7, 2009
  13. chemistry

    Ca + Br2 --> CaBr2 its synthesis and the reason the reaction happens is stable electron configuration but i don't understand why.

    asked by lyne on January 22, 2009
  14. Science

    How would you prove that sodium hydroxide is a base without using a litmus paper to test? Give the equation for the reaction?

    asked by Wissy on April 28, 2016
  15. 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

    asked by Chem on May 8, 2010
  16. Heat

    Consider the following equation: CO + 2 H2 → CH3OH ΔH rxn = -128 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 8.08 g H2. How would u set that up?

    asked by Chemistry on April 19, 2015
  17. chemistry

    Given: Cr3+(aq) + 3e¨C  Cr(s); E¡ã = ¨C0.74 V Pb2+(aq) + 2e¨C  Pb(s); E¡ã = ¨C0.13 V What is the standard cell potential for the following reaction? 2Cr(s) + 3Pb2+(aq) ¡ú 3Pb(s) + 2Cr3+(aq)

    asked by Anonymous on May 3, 2010
  18. chem 101

    using the unit conversion method derive an equation to calculate heat produced from the HCl-Na OH reaction

    asked by andrew on October 26, 2010
  19. Chemistry- Please Help!!

    Predict the proper equilibrium constant expression for the following reaction... Fe(OH)3(s) ----> Fe3+(aq) + 3 OH-(aq) Explain the reasoning behind your answer.

    asked by Kelly on July 27, 2013
  20. ap chemistry

    Consider the reaction 2 Al2O3(s) -> 4 Al(s) + 3 O2(g) . H = +3339.6 kJ/mol How much heat is generated when 0.455 L of a 3.60 M Al solution reacts with 1.05 mole O2 ?

    asked by cheri on October 31, 2012
  21. chemistry

    for a reversible reaction if the concentration of reactant are doubled aad a definate tempreture then equilibrium constant will

    asked by Anonymous on September 4, 2013
  22. chemistry

    A plot of ln k vs. 1/T for the reaction gave a line with a slope - 3250 kelvin determind the energy of activation?

    asked by dea on March 28, 2011
  23. 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

    asked by Chemistry on April 6, 2014
  24. chem 223

    What additional volume of 10.0 M HCl would be needed to exhaust the remaining capacity of the buffer after the reaction described in Part B?

    asked by juan on July 22, 2013
  25. chemistry

    In the redox reaction: 4NH3(g)+3O2(g)-->2N2(g)+6H2O(l) the number of moles of electrons transferred is...

    asked by Metia on May 3, 2010
  26. chemistry

    At what temperature will the following reaction happen spontaneously, given that ΔH=8.91×103J and ΔS= –219.20 J/K? CaSO4(s) + 2HCl(g) → CaCl2(s) + H2SO4(l)

    asked by Rosi on October 29, 2014
  27. chemistry

    explain inside a flashbulb are the 2 reactants necessary for a violent reaction that produce light yet they don't react..

    asked by trina on May 17, 2011
  28. 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 ?

    asked by cheri on October 31, 2012
  29. 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?

    asked by Chris on November 17, 2010
  30. chemistry

    balance the following equation by half reaction method in an acidic medium: C3H8O + MnO4^- gives off C3H6O + Mn^2+

    asked by Jessy on January 13, 2011
  31. Chemistry

    Redox Reactions Can anyone help predict the reaction that will take place when Gold is put into a solution of Hydrochloric Acid?

    asked by Anonymous on March 1, 2008
  32. chemistry

    Ca(s) + Br2(l) --> CaBr2 is synthesis my teacher also said that the cause of the reaction is stable electron configuration is that the same thing as the electrolytes one

    asked by lyne on January 21, 2009
  33. Chemistry

    How do I find the POtential Energy for a reaction from strontium chloride and potassium carbonate? and what is the chemical reactions for the above

    asked by SBB on December 1, 2011
  34. chemistry

    Write a balanced equation showing the solubility equilibrium reaction of solid calcium hydroxide??

    asked by Anonymous on April 12, 2012
  35. Chemistry

    How many grams of dichloromethane result from reaction of 2.62 kg of methane if the yield is 43.5 %? CH4+2Cl -> CH2Cl2+2HCl

    asked by Melia on November 5, 2012
  36. Chem

    Complete and balance the reaction of A) (CH3)2NH(aq)+CH3COOH(aq)→ B) CH3CH2NH2(aq)+HBr(aq)→ C) CH3NH2(aq)+HCOOH(aq)→

    asked by Alex on June 2, 2014
  37. Chemistry

    Explain how conc. H2so4 catalysis the speed of the reaction between salicylic acid and acetic anhydride.

    asked by Alki on February 6, 2016
  38. Living a Healthy Life

    A child's ability to jump for distance is an example of A. flexibility. B. explosive power. C. reaction time. D. agility. B.

    asked by Amanda on November 22, 2014
  39. Chemistry!!

    Complete and balance the reaction of A) (CH3)2NH(aq)+CH3COOH(aq)→ B) CH3CH2NH2(aq)+HBr(aq)→ C) CH3NH2(aq)+HCOOH(aq)→

    asked by Alex on June 2, 2014
  40. Chemistry

    Write an equilibrium reaction equation for each of the following buffer mixtures: a)NH3(aq) and NH4Cl(aq) b)HC7H5O2(aq) and NaC7H5O2(aq)

    asked by Anonymous on January 7, 2018
  41. chemistry

    how do I calculate the mass of ammonium sulfate formed from the complete reaction of 700 grams of ammonia?

    asked by Stephanie on March 17, 2013
  42. Chemistry

    Balance the following equation for a half reaction that occurs in acidic solution. Use e– as the symbol for an electron. Mo^3+ -> MoO2^2+

    asked by Anon on December 2, 2012
  43. AP Chem

    A first-order reaction has a rate constant of 0.547 min - 1. How long will it take a reactant concentration 0.14 M to decrease to 0.07 M? Not sure how to do this!

    asked by Andrea on March 5, 2018
  44. chemistry

    Write a reaction showing what happens to the following in water and identify te conjugate pairs. C6H5NH3 CO3_-2 HCOOh

    asked by Michael on May 19, 2009
  45. chemistry

    write and equation for the reaction of triethylamine and water. does the eqilibrium go to the right or left. so far what I have is C6H15N + H2O but I'm not sure of the products

    asked by casey on April 12, 2012
  46. chemistry

    what is the pressure of H2 if the hydrogen gas collected occupies 14L at 300K and was produced upon reaction of 4.5 mol of Al?

    asked by brenda on March 14, 2010
  47. Biology

    How do u figure out the initial rate of an enzymatic reaction when they only give the time in seconds and the product formed?

    asked by Anonymous on October 7, 2007
  48. Chemistry

    Please help me answer the question: What does it mean Write a net ionic equation for the reaction 2HCl + Ca(OH)2 -> CaCl2 + 2H20

    asked by Brittany on November 19, 2009
  49. Organic Chemistry I

    You have isolated one of the isomeric dimethylcyclopentanes. on reaction it gives you 3 monochloroisomers, which of the possible pentanes is it? How do i do this? they don't give any choices, so how do i figure it out?

    asked by Nick on October 18, 2010
  50. 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.?

    asked by Kelly on October 12, 2015
  51. Chemistry

    I have to write the rate law for two elementary reaction equations A ) 2a+b>c+d B ) X+Y>Z I'm pretty sure it's just k[ A ][ B ] and k[ X ][ Y ] but does the coefficient affect it in this case? is it [ A ]^2 ?

    asked by Dan on February 24, 2016
  52. chemistry

    Balanced equation of the reaction that occurs when the butane in cigarette lighters burns in the presence of enough oxygen

    asked by patience on March 18, 2014
  53. CHEM-HELP!!!!

    8. 2(NH4)3PO4--> 3N2+ O2+ 12H2+ 2PO3 a)name products b)Name the reactant c)type of reaction this is the only info that is given///thank you

    asked by ALEX on June 8, 2009
  54. Science

    Which reaction is exothermic? A. Cellular respiration B. Photosynthesis C. Baking soda + vinegar D. Melting Ice***

    asked by Ally on February 24, 2016
  55. chemistry

    Na3PO4(aq) + AlCl3(aq) produces? Complete and balance each of the following equations. If no reaction occurs, write NOREACTION.

    asked by Anonymous on October 10, 2010
  56. chemistry

    Determine how many milliliters of 0.255 M HClO4 will be required to neutralize 48.56 g Ca(OH)2 according to the reaction: 2HClO4(aq)+Ca(OH)2(s)=CA(ClO4)2(aq)+2H2O(l)

    asked by johnel on December 3, 2012
  57. chemisry

    8. Write the structural formula of organic product that would result from the reaction: CH3—CH=CH2 + H2O->.

    asked by cindy on May 4, 2011
  58. chemistry

    given the following data: S(s)+3/2 O2(g)->SO3(g) H=-395.2 kj 2SO2(g)+ O2(g)->2SO3(g) H=-198.2kj calculate H for the reaction S(s)+ O2(g)->SO2(g)

    asked by rame on April 25, 2012
  59. Chemistry

    I have to write the rate law for two elementary reaction equations A ) 2a+b>c+d B ) X+Y>Z I'm pretty sure it's just k[ A ][ B ] and k[ X ][ Y ] but does the coefficient affect it in this case? is it [ A ]^2 ?

    asked by Dan on February 24, 2016
  60. Chemistry

    What is the minimum amount of 6.0M H2SO4 necessary to produce 19.0g of H2(g) according to the reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g)

    asked by Jordan on November 14, 2014
  61. CHEMISTRY

    complete and balance the reaction. HCl + Ba(HO)2 --- the 2 is suppose to be a sub 2 but can get it to do so on this computer and the --- is an arrow. I believe it is BaClO + H2O is this correct?

    asked by Carla on May 3, 2011
  62. chm152

    At a particular temperature, Kc = 54 for the reaction H2(g) + I2 (g) 2 HI(g). One mole of HI is placed in a 3.0-L container. What would be the equilibrium concentration of HI? Choose one answer. a. 0.035 b. 0.071 c. 0.29 d. 0.30 e. 0.33

    asked by AMI on March 28, 2010
  63. Chemistry

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

    asked by Allison on April 5, 2013
  64. Science PLEASE HELP

    How does Exothermic and Endothermic reactions affect the rate of a reaction? Please help. I need something that will be easy for me to understand and adopt into my own words. Thank You :)

    asked by Anonymous on November 23, 2014
  65. chm152

    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

    asked by ami on March 27, 2010
  66. Chemistry

    Which of these is best described as an acid-base reaction? KCl + NH4NO3 = KNO3 + NH4Cl NH3 + H2O = NH4 + OH

    asked by Anna on September 29, 2011
  67. chemistry

    what is the gas formed when baking soda is added to vinegar? complete the reaction: NaHCO3(s) + CH3COOH(aq)

    asked by shay on October 3, 2012
  68. chemistry

    a. what is the effect on the Kc when the temperature of an exothermic reaction is lowered? b. according to Le Chatelier's principle, how is equilibrium in part a established.

    asked by Boo Boo on November 30, 2012
  69. Chemistry

    What is the concentration of the Mg2 ion in solution when [CO3-2] = 0.25M given that the Ksp= 6.82 x 10-6 for the following reaction MgCO3-------->Mg +. CO32-

    asked by Monique on November 11, 2011
  70. Chemistry

    Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Mg2 ] = 0.763 M and [Sn2 ] = 0.0180 M Mg(s)+Sn^2+(aq)-->Mg^(2+)+Sn(s) I keep getting 2.57 but it says I'm wrong. Please help me!

    asked by Lizzie on May 19, 2014
  71. chemistry 12

    what is the chemical formula for the reaction between lead acetate and potassium iodide? please show both reactants and products. :)

    asked by need help on September 6, 2008
  72. Chemistry

    Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Mg2 ] = 0.763 M and [Sn2 ] = 0.0180 M Mg(s)+Sn^2+(aq)-->Mg^(2+)+Sn(s) I keep getting 2.57 but it says I'm wrong. Please help me!

    asked by Lizzie on May 19, 2014
  73. Chemistry

    If a procedure calls for 2mL of a concentrated nitric acid, what are the mass and moles of the HNO3 actually used in the reaction?

    asked by Dem on September 6, 2012
  74. chemistry

    Write a balanced chemical equation for the reaction that occurs when the hydrocarbon styrene, {\rm C}_{8}{\rm H}_{8}(l), is combusted in air.

    asked by seema on October 5, 2011
  75. Organic Chemistry

    What is the mechanism of action between sodium benzoate (NaC6H5COO) and hydrochloric acid (HCl)? I need to know where the electrons go in this reaction.

    asked by BOB on October 12, 2011
  76. chemistry

    The dH for the reaction below is -482 kJ. Calculate the heat (kJ) released to the surroundings when 12.0 g of CO (g) reacts completely. 2CO(g) + O2(g) --> 2CO2(g)

    asked by tank on April 16, 2012
  77. Chemistry

    Which of these is best described as an acid-base reaction? KCl + NH4NO3 = KNO3 + NH4Cl NH3 + H2O = NH4 + OH

    asked by Anna on September 29, 2011
  78. Chemistry

    Which of these is best described as an acid-base reaction? KCl + NH4NO3 = KNO3 + NH4Cl NH3 + H2O = NH4 + OH

    asked by Anna on September 29, 2011
  79. chemistry

    Please help again. How many grams of lithium are required to completely react with 70.7 mL of N2 gas at STP when given the following reaction: 6Li + N2 = 2Li3N

    asked by Lisa on December 4, 2011
  80. chemistry

    14. The reaction H2S (aq) = HS-(aq)+ H+(aq) has pK = 7 at 298 K, 1bar. Consider a solution in which total dissolved sulfur is 10^-5 molal. At pH = 3, pH2S =

    asked by Anonymous on May 12, 2013
  81. ap chemistry

    what is the galvanic cell for the redox reaction between sodium dichromate and mercury(I) nitrate in an acidic solution.

    asked by brian on October 16, 2010
  82. Science

    How does Exothermic and Endothermic reactions affect the rate of a reaction? Please help. I need something that will be easy for me to understand and adopt into my own words. Thank You :)

    asked by Anonymous on November 23, 2014
  83. Chemistry

    In the following unbalanced reaction, which atom is oxidized? HNO3 + HBr -> NO + Br2 + H2O Is the answer bromine?

    asked by Anonymous on May 20, 2013
  84. Chemistry

    in a neutralization reaction, dilute tetraoxosulphate (vi) acid completely reacted with sodium hydroxide solution

    asked by Archie on February 9, 2016
  85. Chemistry

    how many liters of oxygen are necessary for the combustion of 425 g methane assuming the reaction takes place at STP

    asked by Alicia on February 17, 2011
  86. organic chemistry

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

    asked by believe on May 20, 2009
  87. organic chemistry

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

    asked by cindy on May 21, 2009
  88. Chemistry

    For the following reaction, how many kJ of heat are produceed in forming 225.0 g of NO? 4 NH3 + 5 O2 → 4 NO + 6 H2O ΔHrxn = -906 kJ/mole

    asked by Morgan on July 6, 2016
  89. 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 ?

    asked by Mary on January 10, 2014
  90. chemistry

    The rate constant for this first-order reaction is 0.0570 s–1 at 400 °C. A-->Products After how many seconds will 14.0% of the reactant remain?

    asked by k on March 23, 2012
  91. Chemistry

    Which of these is best described as an acid-base reaction? KCl + NH4NO3 = KNO3 + NH4Cl NH3 + H2O = NH4 + OH

    asked by Anna on September 29, 2011
  92. Chemistry

    A chemist ran the reaction and obtained 5.70 of ethyl butyrate. What was the percent yield? How do I solve this problem?

    asked by Nancy on December 6, 2011
  93. physics

    Calculate the energy released in the fusion reaction 2 3 4 1 1 H + 1 H->2 H +0 n. The atomic mass of 3 1 H (tritium is 3.016049 u. I am lost! help please!

    asked by J on May 6, 2008
  94. chemistry

    What physical property of water and HCl allows us to separate them from the zinc chlorine compound produced in the reaction?

    asked by wendy on February 5, 2015
  95. Language of Health Care

    How are the processes of blood clotting, immune response, allergic reaction, and hormone release interrelated?

    asked by Patricia on January 15, 2009
  96. Chemistry

    The half-life (t1/2) of a first order reaction is 0.100 s. What is the rate constant? a. 6.93 s-1 b. 0.693 s-1 c. 0.0693 s-1 d. 0.144 s-1 e. 3.01 s-1

    asked by Shines on December 6, 2013
  97. gr10 science

    How could I write a general statement about how a chemical reaction might affect the total mass of reactants and products?

    asked by Rebecca on April 26, 2011
  98. chemistry

    Give the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of MgSO3 and HI are mixed

    asked by Anonymous on April 13, 2011
  99. Chemistry

    Determine how many milliliters of 0.448 M HClO4 will be required to neutralize 38.30 g Ca(OH)2 according to the reaction: 2HCl+Ca(ClO4)2+2H20

    asked by Anonymous on December 15, 2010
  100. Chemistry

    When the equation for the following reaction in basic solution is balance, what is the sum of the coefficients? MnO2 + HO2^1-.....>MnO4^1- A=11 B=31 C=14 D=9

    asked by Wube on April 28, 2012