1. math

    Part of the road is to be on a parabolic curve given by a function of the form y = ax2 + bx + c where x and y are local co-ordinates. The road alignment must pass through the following 3 points:- x = 150m y = 190.650m x = 300m y = 611.450m x = 450m y =
  2. rate of reaction

    What is the initial rate of *appearance* of SO3(g)? a reaction and table are given: reaction: 2S02(g)+O2 -------> 2 SO3(g) Table note: i= initial, IRD= initial rate of disappearance; concentrations given in molarity (M) IRD given in M/s. Experiment [SO2]i
  3. spanish

    Subjunctive, infinitive, or indicative??? can anyone please correct me??? I try to practice it before my test but I'm really confused about it, and also please explain why I did it wrong??? muchas gracias!!!! Put ir in the nosotros subjunctive form vayamos
  4. Math

    Use the quadratic formula to solve each of the following quadratic equations... 1. 2x^2-5x=3 2. 3x^2-2x+1=0 Rearrange the equation in quadratic formula form. 2x^2 -5x -3 = 0 Then use the formula. Tell me what you don't understand about it if you don't know
  5. chemistry

    When N2O5 (g) is heated it dissociates into N2O3 (g) and O2 (g) according to the following reaction: N2O5 (g) N2O3 (g) + O2 (g) Kc=7.75 at a given temperature. The N2O3 (g) dissociates to give N2O (g) and O2 (g) according the following reaction: N2O3 (g)
  6. Chem II

    2.5 mol NOCl(g) was placed in a 2.50 L reaction vessel at 400 degrees C. After equilibrium was established, it was found that 28% of the NOCl had dissociated according to the equation: 2NOCl(g)2NO(g)+Cl2(g) Calculate the equilibrium constant, Kc, for the
  7. Chem

    How does the collision model explain the ffect of concentration on the reaction rate?
  8. advanced chem

    Calculate the standard cell potential at 25 ∘C for the reaction X(s)+2Y+(aq)¨X2+(aq)+2Y(s) where ƒ¢H∘ = -653 kJ and ƒ¢S∘ = -263 J/K .
  9. Chemistry

    If SiO_2 undergoes a double-displacement reaction with HF, what is the balanced equation?
  10. Inorganic Chemistry

    what is the product of reaction K3(Al(C2O4)3).3H2O with KMnO4 in the present of NaOH?
  11. Chemistry

    How is Stiochmetry or anything that has to do with quantities in chemical reaction used in everyday like except for making cakes?
  12. Chemistry

    What is the formula of the precipitate formed from the precipitation reaction of Li2CO3 and ZnCl2?
  13. Chem

    How does the collision model explain the ffect of concentration on the reaction rate?
  14. Chemistry

    Which value is most likely to be the pH of a salt that is formed by the reaction of a strong acid and a weak base
  15. chemistry

    how do i balance Cu+O2 arrow(i don't know how to make one)CuO. And what is the reaction type.
  16. Chemistry (11th)

    Write the reaction for combustion of CH4 include the heat term.
  17. Chemistry

    What kind of reaction is it when the reactants produce carbon dioxide and water
  18. chemistry

    Redox reaction in assign oxidation number is ca3(po4)2
  19. chemistry

    write the reaction for the neutralization of nitric acid with calcium hydroxide.
  20. science (PLEASE HELP)

    Why is condensation on the beaker resulted from burning methane a chemical reaction?
  21. Chemisty

    blanced equation for MgSO4(aq) + BaCl2(aq) describing any precipitaion reaction
  22. biology

    what compound is formed when CO2 is bubbled through water?show the reaction.
  23. Chemistry

    Why is it that the reaction between benzoyl chloride and methanol do attack carbon from the ring
  24. chemistry

    If the initial volume of the is 1.2 , what total amount of (in moles) is formed in the first 50 of reaction
  25. chemistry

    what is an example of autocatalysis? what will the graph of the rate of an autocatalytic reaction versus time look like?
  26. Chemistry

    Kc=1. The initial concentrations are A = 0M, B = 0M, C=10M. A+B --> C calculate the reaction quotient. (c)/(a)(b) = 10/0 .. is the answer zero?
  27. Chemistry

    what effect does a catalyst have on.. a) energy of the reactants b) enthalpy change of the reaction
  28. science

    need to identify the elements, compounds and mixtures of the iron and sulpher reaction.
  29. AP Chemistry

    write an oxidation- reduction reaction for the reactants OCl- and S2O3-2
  30. chemistry

    Calculate the standard enthalpy change for the following reaction at 25 °C. H2O+C(graphite)(s) --> H2(g) +CO(g)
  31. chemistry

    __NH3(g) + __ O2(g) → __ N2(g) + __ H2O(g) When the reaction above is completely balanced, the coefficient for NH3 will be (a) 2. (b) 3. (c) 4. (d) 6.
  32. Chemistry

    3.00 g of Zn is allow to react with 1.75 g CuSO4 . calculate how many grams of Zn will remain after the reaction is complete ?
  33. Chemistry

    How is 4FeS2 + 11O2 = 2Fe2O3 +8SO2 a single replacement reaction?
  34. chem

    Calculate delta G rxn for a redox reaction with n = 2 that has an equilibrium constant of K = 4.4×10−2.
  35. 8th grade science

    compare and contrast the effect of a catalyst on a chemical reaction with that of an inhibitor?
  36. Chemistry

    What is the value of the equilibrium constant for the overall reaction? ​​ AgCl (s) + 2NH3 (aq) Ag(NH3)2+ (aq) + Cl- (aq) Knet = ?
  37. chem 11

    write the balanced equation for the electrolysis of water. What type of reaction is this?
  38. Chemistry

    All the following are necessary parts of a neutralization reaction except A) an acid B) an indicator C) water D) a salt.
  39. Science

    Explain the reaction (iron sulpide) using the Big Idea of Energy?
  40. chemistry

    what are the products of the following reaction. CH3COOH+CH3CH2OH---> (there is an H+ above the dotted arrow line)
  41. chemistry

    How many moles of H2(g) will be formed in the reaction between 0.99mol CaH2(s)and 1.43mol water ?
  42. Chem II

    The molecularity of the elementary reaction CH3NC ---> CH3CN is _____ six two zero ond
  43. Chemistry!

    What is theoretical yield when 15.6g of bromobenzene & 8.3g of methyl benzoate is used in a Grignard reaction.
  44. chemistry

    If I react 3,5-dimethylphenol with NaOH what would my product be? Is this an acid base reaction?
  45. chem

    reaction btw pent2 ene with Hbr give two products. what are they?
  46. phyicss

    Torque due to action reaction force is not zero true false
  47. Chemistry

    What type of bond is formed in the reaction 4Fe(s)+3O2(g)? Rust?
  48. chemistry

    By what factor is the rate of a reaction changed if an enzyme lowers the Ea by 9.0 kJ/mol at 37°C?
  49. Science

    Chemistry: What is the general formula for a chemical reaction? reactants >> products
  50. Chemistry

    The \rm p \it K_{\rm a} of this reaction is 4.2. In a 0.74\it M solution of benzoic acid, what percentage of the molecules are ionized?
  51. Science

    Whats an example of product? Definition: the substances produced in a chemical reaction
  52. chemistry

    Calculate the number of moles of O2 that can be produced by the decomposition reaction of water
  53. chemistry

    How many mL of 0.6 M H2SO4 solution are needed to react completely with 23.62 g of Fe2O3 in the following reaction?
  54. Chemistry

    What gas involved during the reaction between zinc and hydrochloric acid? I know it's hydrogen, but why?
  55. chemistry

    write the reaction of propanal reacting with: CH3CH2NH2 and CH3MgClthen H2O/H+
  56. Chemistry

    What gas involved during the reaction between zinc and hydrochloric acid? I know it's hydrogen, but why?
  57. Chemistry

    Does Sodium and potassium react with steam? Or is the reaction too violent to speak of?
  58. chemistry

    1.10 is allowed to react with 9.57 , producing 2.50 . What is the theoretical yield for this reaction under the given conditions?
  59. Chemistry

    2H2O --> 2H2 + O2 if 30 mL of hydrogen in the above reaction, how many milliliters of oxygen are produced?
  60. chemistry

    Write the equilibrium constant expression for the reaction 2 NO (g) + Br2 (g) ↔ 2 NOBr (g)
  61. Science

    Why is that instantaneous rate of reaction does not change when a part of the reacting solution is taken out?
  62. for Drbob222

    how do I calculate pressure exerted by H2 in a Mg and HCl reaction? (weighing by redox)
  63. Chemistry

    A certain first-order reaction A--->B is 25% complete in 42 min at 25 degrees C. What is the rate constant?
  64. Chemistry

    Which reaction would occur more readily? Why? 1) Mg + Cl2 --> MgCl2 2) 2Mg + O2 --> MgO Thanks!
  65. CHEMISTRY HELP !!!!

    Complete the following fission reaction 1/0 n + 235/92 U ---> 236/92 Te + _____ +2 (1/2)n a) 97/40 Zr b) 99/40 Zr c) 99/38 Sr d) 95/42 Mo e) 96/41 Y Answer is A or B not sure
  66. Chemistry

    Calculate the temperature at which k = 2.0 s-1 if k = 10.0 s-1 at 371 K. The activation energy for the reaction is 30.0 kJ mol-1.
  67. Chemistry

    2H2O --> 2H2 + O2 if 30 mL of hydrogen in the above reaction, how many milliliters of oxygen are produced?
  68. chem

    what is the major product of this reaction CH2=CH-CH2CH3+H2O H2SO4
  69. chemistry

    what element is undergoing oxidation in the following reaction Zn(s)+AgNO3(aq) Zn(NO3)2(aq)+2Ag(s)
  70. chemistry

    what element is undergoing oxidation in the following reaction Zn(s)+AgNO3(aq) Zn(NO3)2(aq)+2Ag(s)
  71. Chemistry

    2H2O --> 2H2 + O2 if 30 mL of hydrogen in the above reaction, how many milliliters of oxygen are produced?
  72. chemistry

    Any reaction that absorbs 150 kcal of energy can be classified as ________.
  73. chemistry

    Net Ionic Reaction and molecular Equations of Ca3(PO4)2
  74. o.chem

    how would doubling the concentration of the nucleophile affect the rate of an sn2 reaction?
  75. chemistry

    what is the product of reaction K3(Al(C2O4)3).3H2O with KMnO4 in the present of H2SO4?
  76. chemistry

    I wanted to know that in a chemical reaction are the products part of the system or surrounding?
  77. chemistry

    The following reaction consumes 2.40 kg of CO, How many total liters of gas are formed at STP?
  78. chemistry

    does Adding A increased Q, so the net reaction proceeds to the left to decrease Q. a+b=ab
  79. polymer science

    how can we get copolymer from polymer give the reaction condition and how can its possible and the equation for the copolymerization.
  80. Chemistry

    What element is undergoing oxidation (if any) in the following reaction? CH4(g) + 2 O2(g) ¨ CO2(g) + 2 H2O(g)
  81. Biology

    Describe how you can achieve negative free energy in a chemical reaction.
  82. science

    ZnS(aq) + 2HCl(aq) --> ZnCl2(aq) + 2H2S(g) what happens in this reaction means what changes& colour happens????
  83. organic

    what will the structure look like if a tetrahedral intermediate is formed during the reaction of an ester with an amine?
  84. Chemistry

    List three ways in which the yield of ammonia in the reaction above can be improved for a given amount of H2.
  85. chemistry

    Need help balancing this chemical reaction equation Ca(NO3)2+2NaOH>Ca(OH)2+2NaNO3
  86. chemistry

    Which reaction illustrates water acting as a Bronsted Lowry base?
  87. Science

    Why is that instantaneous rate of reaction does not change when a part of the reacting solution is taken out?
  88. biology

    chemical reaction involve changes in bonds between atoms. true or false
  89. Chemistry

    The combustion of 1 mole of CO according to the reaction CO(g) + ½O2(g) → CO2(g) + 67.6 kcal gives off how much heat?
  90. CHEMISTRY

    15.0g of KCLO3 was crushed and heated with about 0.1g of MnO2.Write an equation for the reaction.
  91. science

    Which rate constant would result in the fastest reaction? Which rate constant would result in the fastest reaction? 1 1.3 × 103 L/mol · s 2 2.8 L/mol · s 3 9.5 × 10-2 L/mol · s 4 4.2 × 10-3 L/mol · s
  92. chemistry

    When you mix baking soda with vinegar is the reaction endothermic or exothermic?
  93. Chemistry

    If u place a metal cube in beaker as a catalyst, what effect will it have on the reaction? And why?
  94. Chemistry

    What coefficient of H+ balances the atoms in the following half-reaction? H^+ + MnO2 Mn^2+ + H2O A.1 B.2 C.3 D.4 I think this is B...?
  95. science

    what will happen if you increase the surface area of a solid in a chemical reaction?
  96. chemistry

    What mass of F2 is needed to produce 116 g of PF3 if the reaction has a 77.4% yield?
  97. chemistry!

    how many moles of product are formed in the reaction? 2Al(s),3Cl2(g)--->2AlCl3(s) please help me!! thank you so much
  98. chem

    2 HNO3(aq) + Na2CO3(s) 2 NaNO3(aq) + H2O(l) + CO2(g) (a) Calculate H° for this reaction. kJ
  99. chemistry

    What is the net ionic equation for the following reaction?FeCl3(aq)+3LiOH(aq) -> Fe(OH)3(s)+3LiCl(aq)
  100. science

    how to balance chemical equations with redox reaction Cr(OH)3 + IO3{-} + OH{-} = CrO4{-2} + I{-}