1. chemistry

    1. In the reaction 2Ca(s) + O2(g) → 2CaO(s), which species is oxidized?

    asked by anna on November 13, 2015
  2. chemistry

    The equation Mg(s) 2HCl(aq)---MgCl2 (aq) H2(g) is an example of which type of reaction?

    asked by natasha on July 29, 2008
  3. GSGS

    what is a limiting reagent of the reaction CuSO4 and Pb(NO3)2

    asked by GSGS on July 9, 2012
  4. Chemistry

    give the reaction when lead nitrate is heated

    asked by gallium on August 14, 2011
  5. chem

    write the balanced half-reaction for the conversion of Fe(s)to Fe+2(aq)

    asked by ama on May 12, 2008
  6. Chemistry

    What is the Net Ionic Reaction for NaOH(aq) + H2SO4(aq)-->

    asked by Erick on May 8, 2012
  7. Science

    The half-reaction of 3 Pb + 2 NO3 + 8 H-->3 Pb2+ + 2 NO + 4H2O

    asked by Noluvuyo habasisa on March 14, 2011
  8. chemistry

    questions related to yield of chemical reaction.

    asked by werksow on March 2, 2012
  9. chem

    evaluate E^0 for the half reaction: CO2 (g) + 2H + 2e^- HCOOH ( Aq)

    asked by katya on November 17, 2008
  10. Chem

    What is the oxidation half-reaction for Mg(s)+ZnCL2(aq)>MgCL2(aq)+Zn(s)?

    asked by Whitney on February 27, 2014
  11. chemistry

    why might you not observe a reaction even though an activity series indicates it should occur?

    asked by mel <3 on February 27, 2011
  12. chemistry

    What are the products of a reaction between NaCl, HNO3, and AgNO3?

    asked by Neil on March 14, 2011
  13. science

    how the particals behave in the reaction between iron and suiphur

    asked by GG on October 13, 2009
  14. 1st grade

    please help me with easy comments about sulpur and iron reaction

    asked by gina on November 12, 2008
  15. physics

    reaction of lead nitrate with sodium iodide

    asked by teele on June 15, 2012
  16. chemistry

    WHAT TYPE OF CHEMICAL REACTION IS FORMED FROM Mg + O2----MgO

    asked by lOUISE on September 14, 2010
  17. chem 2

    calculate kc for reaction I2 (g)+Cl2 (g)⇌2ICl(g )Kp=81.9 (at 298 K)

    asked by tiffany on October 6, 2013
  18. Chemistry

    What is the equation for the reaction between stearic acid and ammonia?

    asked by Anonymous on January 22, 2016
  19. science

    the spectator ions of all substance that are soluble of the reaction

    asked by kholofelo on September 2, 2015
  20. physics

    Complete the following nuclear reaction: ^16,v8 O + ^4, v2 He → ________ + ^19, v10 Ne 1p 1n 2H 3H

    asked by Anonymous on March 18, 2014
  21. Chemistry

    Can the reaction 2Ni(s)+MgSo4(aq) occur.Explain why?

    asked by Anonymous on April 2, 2013
  22. Chemistry

    If ions O^2- are added to water, what reaction, if any, occurs?

    asked by Josh G. on November 15, 2012
  23. General chemistry i

    Is this a redox reaction? 4Cr+3O2 -> 2Cr2O3

    asked by Dean A on February 23, 2016
  24. Huck fin

    If you have read Huckleberry Finn before, what was your initial reaction to it?

    asked by Jordan on January 20, 2012
  25. CHEM

    At 1100 K, Kp = 0.25 for the following reaction. 2 SO2(g) + O2(g) 2 SO3(g) What is the value of K at this temperature?

    asked by Anderson on January 8, 2012
  26. PLEASE CHEM

    balance the redox reaction NO2^- + Ag^+ = NO3^- + Ag

    asked by LOLA on February 14, 2015
  27. Chem

    Is this half-reaction H2(g) + 2 OH-(aq) ===> 2 H2O(l) = 2 e reduction or oxidation?

    asked by Ginger on March 29, 2008
  28. Chemistry

    For the reaction H2(g) + I2(g) ⇀↽ 2 HI(g) at 425◦C, calculate [HI], given [H2] = [I2] = 0.000617 mol/L and K = 54.3.

    asked by Claire on April 23, 2016
  29. science

    what is the difference between a physical change and a chemical reaction

    asked by hi on March 10, 2011
  30. chemistry

    could the products ever become the reactants in chemical reaction? explain. thanks!

    asked by lauren on August 30, 2012
  31. Chemistry

    explain why glucose 1,6 bisphosphate would not be able to go through the aldolase reaction.

    asked by Max on October 20, 2013
  32. Chemistry

    Hess'slaw can be applied to calculate the reaction is?

    asked by Shyam on July 17, 2018
  33. CHEM

    At 1100 K, Kp = 0.25 for the following reaction. 2 SO2(g) + O2(g) 2 SO3(g) What is the value of K at this temperature?

    asked by Anderson on January 8, 2012
  34. chemistry

    is it possible for the reaction between two aqueous solutions to be neither endothermic or exothermic?

    asked by Anonymous on November 9, 2008
  35. science

    Classify the reaction between zinc and acetic acid.

    asked by Person on December 3, 2017
  36. science

    Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic?

    asked by cuz im not too smart. on March 8, 2016
  37. chemistry

    What is the balanced equation for a reaction of iron with chlorine?

    asked by Beth on May 23, 2013
  38. chem

    what volume of 1M NaOH is needed for the reaction with 1L of 1M HCl?

    asked by rick on July 30, 2012
  39. chemistry

    given reaction at equilibrium, if Kp=1.05 at 250 degree celcius, then kc =

    asked by jay on March 22, 2011
  40. weber state university

    CH2=CH-CH2CH3+H2O What is the product of the reaction above

    asked by erica on April 11, 2013
  41. chemistry

    How do you balance a chemical reaction word equation?!

    asked by Lacey on March 1, 2012
  42. Chem

    What is the enthalpy for the following reaction? C2H4+H2O--->C2H5OH

    asked by Kay on November 4, 2010
  43. Science

    How are these related? reractant, product, and chemical reaction

    asked by Bryce on September 5, 2011
  44. Chemistry

    I really need help with this; it'll be the last chemistry question I ask: 44. Identify the type of reaction. a. AB ---> A+B b. AB + C--> AC + B c. AB + CD --> AD + CB Thanks -MC

    asked by mysterychicken on November 3, 2010
  45. Chemistry

    How many grams of Ni(OH)2 are produced from the reaction of 30.0 mL of 1.75 M NaOH solution?

    asked by Lynn on May 24, 2010
  46. Chemistry

    What is the oxidized substance in the following reaction? Fe + 2HCl → FeCl2 + H2

    asked by Dylan on July 6, 2016
  47. Chemistry

    How do i figure out if 2NO2 -> N2O4 is a redox reaction

    asked by Cabby on March 18, 2016
  48. science

    what is the balance chimical reaction for sulfuric acid?

    asked by Baller on October 18, 2011
  49. organic chemistry

    how do you increase the yield of triphenylmethanol in a grignard reaction?

    asked by Rachel on March 8, 2010
  50. Chemistry

    What is the minimum amount of 5.9M M H 2 SO 4 necessary to produce 26.7g of H 2 (g) according to the following reaction? 2Al(s)+3H 2 SO 4 (aq)¨Al 2 (SO 4 ) 3 (aq)+3H 2 (g)

    asked by Anonymous on August 5, 2013
  51. Chemistry

    What is an example of an everyday endothermic reaction in which bonds are broken?

    asked by Anonymous on October 13, 2018
  52. Chemistry

    Explain why a catalyst speeds up a chemical reaction.

    asked by Tais on August 1, 2015
  53. Chemistry

    Which of the following shows the correct dissolution reaction for BaCl2?

    asked by Morgan on September 16, 2015
  54. Chemistry

    How much heat is produced by the complete reaction of 5.29 kg of nitromethane?

    asked by Isaac on July 28, 2016
  55. chemistry

    How much heat (in kilocalories) is released when 7.87g of Al is used in the reaction?

    asked by dakota on March 9, 2015
  56. organic chemistry

    how do you increase the yield of triphenylmethanol in a grignard reaction?

    asked by Rachel on March 8, 2010
  57. Science

    How do I write the correct dissolution reaction for BaCl2

    asked by Morgan on September 16, 2015
  58. chemistry 30

    Calculate the enthalpy of reaction for the combustion of ethene.

    asked by . on March 9, 2015
  59. chemistry

    Balance redox reaction. Fe(s) + O2(g) + H2O(l)-->Fe2+(aq) +OH-

    asked by michelle on February 8, 2015
  60. algebra

    ------Suppose someone opens the valve on a large water tank so that water drains out. Choose a starting volume of water in the tank (from 100 to 500 gallons), and choose how much water drains out each day (from 2 to 5 gallons). Write the equation that

    asked by Olive on October 6, 2013
  61. Chemistry 12

    15. The concentration of hydroxide ions in a solution of nitric acid 0.2 M is: a. 2 x 10-14 M b. 5 x 10-14 M c. 5 x 10-7 M d. 2 x 10-1 M 16. Aqueous solutions of strong acids and strong bases: a. are good electricity conductors b. make litmus paper become

    asked by Need Help on December 3, 2012
  62. Algebra

    Need help with two questions. I've been stuck on them for a while now. 1) Find a general form of an equation of the line through the point A that satisfies the given condition. A(−2, 5) slope 3/4 2)Find a general form of an equation of the line through

    asked by Jim on February 25, 2013
  63. 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 ,

    asked by Patrick on November 29, 2015
  64. 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 ,

    asked by Patrick on November 29, 2015
  65. 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 ,

    asked by Patrick on November 29, 2015
  66. Algebra 1

    1) Find the possible values of a, if the distance between the points is 5, and the coordinates are (1, 1) and (4, a). I don't know how to solve this one. 2) in a right triangle the length of the hypotenuse is 14 and the length b of one of the legs is 8.

    asked by Eri on May 31, 2013
  67. Chemistry

    Hi! So, I thought I was very comfortable with distinguishing among Arrhenius, Bronsted-Lowry, and Lewis acids and bases. But then, I answered this question wrong and am looking for help because I'm not sure if my "second choice" answer is correct. The

    asked by JL on April 24, 2010
  68. Chemistry

    42. Tell the function of the moderator and control rods in a nuclear reactor. I found this answer on google..is it correct? The function of the moderator is to slow down the neutrons produced by fission to greatly increase the probably that they will go on

    asked by mysterychicken on October 30, 2010
  69. Chemistry

    Which of the following reactions is exothermic? 1. Na(s) --> Na(g) 2. Na(g) --> Na+ + e- 3. Cl2(g) --> 2Cl(g) 4. Cl(g) + e- --> Cl-1 My guess is 4, but I'm not sure Here is what you do. For 1, do we think it will take energy to change Na as a solid to Na

    asked by Fiona on May 1, 2007
  70. Chemistry

    1. Which of the following is one way to prevent the corrosion of iron? A. Paint exposed iron parts with protective paint. B. Protect the iron from polluted air. C. Add carbon to the iron. D. Let the iron develop a natural coat of carbonate. 2. The source

    asked by StarBuddy on October 3, 2013
  71. chemistry

    Hydrogen gas can produced by the reaction between metallic aluminum and aqueous hydrochloric acid 2Al+6HCl----2AlCl3+3H2 Hydrogen gas produced by this reaction is typically collected via water displacement, during which time the hydrogen gas becomes

    asked by shadow on November 19, 2013
  72. Chemistry

    A 100 L reaction container is charged with 0.724 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 1.82x10-3

    asked by Anonymous on February 21, 2013
  73. chemistry - Dr.Bob222 please help

    Hi Everyone, Anyone want to try giving these a shot? The right electrode in a cell is a piece of copper immersed in a 1.00 L solution of 0.0701 F copper sulfate. The left electrode is a galvanized nail (i.e., an iron nail that is completely coated with a

    asked by ajones51 on November 8, 2006
  74. Math

    Find the product 8 1/3 x 3/5 in simplest form Find the product 5 1/2 x 3 1/3 in simplest form Use distributive property to find the product 4 2/5 x 10

    asked by Heather on January 28, 2015
  75. English

    1. My hobby is internet games and paper folding. 2. My hobbies are internet games and paper folding. ----------- Which one is grammatical? 3. My hobby is exchanging text messages on Kakao Talk on my smart phone. 4. My hobby is talking with my friends on

    asked by rfvv on March 23, 2016
  76. Physics

    Physics question on identify the reaction? I am having trouble with the question a, b, and c in this physics problem: One or more external forces are exerted on each object enclosed in a dashed box shown in the figure below. Identify the reaction to each

    asked by Lin on February 28, 2011
  77. Spanish

    This is my assignment: Imagine you are babysitting your little brother. Write a total of 5 Spanish sentences using tú commands telling your little brother what to do. Write 3 sentences using regular verbs. Write 2 sentences using irregular verbs. You can

    asked by Jessie on May 16, 2014
  78. Chemstry

    I just copied this because i have a couple more questions on this part.... Sulfuric acid/ Lead Battery: -the electrodes for the battery are composed of Pb(s), PbO2, and/or PbSO4. What are the half reaction occuring at each electrode? include electrolysis

    asked by Sara on April 29, 2008
  79. English

    1. We decided to go abroad. 2. We made up our mind to go abroad. 3. We made a decision to go abroad. 4. We made up our minds to go abroad. (Are they all interchangable? Do we have to use the plural form 'minds' or the singular form 'mind'?) 5. We

    asked by rfvv on May 2, 2010
  80. Algebra 2/Statistics

    From a squad of 12 cheerleaders, 10 will assemble themselves into a 4-level pyramid at the Homecoming rally. 1.) How many different combinations of cheerleaders can be used to build the pyramid? For this I got 12C10=66......Right or Wrong? 2.) The coach

    asked by Jordan on April 30, 2015
  81. chemistry

    Hey...how r u guys..thanks for helping me on my previous questions...can u help me solve two questions and check one? Thanks, all the questions are related to the info given: In some industrial processes, sodium chromate is added to water coolants. When

    asked by David on June 19, 2006
  82. Art

    I am suppose to look at the sculpture Madonna and Child within an Arch by Donatello. I am suppose to say what elements of art are used in this sculpture. The elements of art in case you don't know are form texture color shape line and value. I said this

    asked by Bella on May 16, 2012
  83. Science please help

    Draw Bohr diagrams of a magnesium atom bonding with fluorine atoms. Draw atoms then electron transfer and finally the ions that form. What type of bonding occurs? Draw Bohr diagrams of 2 hyrdogen atoms bonding with an oxygen atom by sharing electrons to

    asked by Anonymous on March 3, 2014
  84. calculus totally confused

    find a first degree polynomial function p(1) whose value and slope agree with the value and slope of f at x=c. i think you use taylor series for this f(x)=4/sqrt(x), c=1 i'm totally confused on how to do it. i know you find the derivative but how do i get

    asked by david on March 14, 2007
  85. Math

    In an isosceles triangle, the perimeter is 8 more than 2 times on of the legs. If the perimeter is 28 in, find the length of the base. A. 16 in B. 18 in C. 10 in D. 8 in Given triangle ABC with A(-3, 2), B(-1, -4), and C(4, 1), write the equation for the

    asked by SkatingDJ on January 14, 2016
  86. Urgent Spanish Check

    A) Read the following sentence and choose which word is not correct in the context of the sentence. 1) La examen es difícil. La? 2) El árbol es verdes. el? B) The following sentence is written in singular form. Read the sentence, then choose the correct

    asked by Katt on September 17, 2014
  87. ChemistryDrBob222

    Arrows disappeared from below added them back to the equations. The decomposition of IBr(g)into I2 (g) and Br2 (g) is first order in IBr with k = 0.00255/sec. (a)Starting with [IBr] = 1.50M, what will [IBr] become after 2.50 minutes? (b)How long, in

    asked by David on January 26, 2011
  88. Math

    A piece of wire is bent to form a square of area 121cm. Calculate: a)the length of each side of the square. b)the perimeter of the square. The piece of wire is now bent to form a circle using π=3.14 Calculate: a)the radius of the circle b)the area of the

    asked by Baller T on September 24, 2015
  89. Math22

    1. Write the composite function in the form f(g(x)). [Identify the inner function u = g(x) and the outer function y = f(u).] y= (g(x), f(u)) = 2. Write the composite function in the form f(g(x)). [Identify the inner function u = g(x) and the outer function

    asked by Anonymous on October 7, 2014
  90. math

    4.10:1.90 in the form of n:1

    asked by osi on March 31, 2012
  91. engineering

    what is the SI form A)MN/ks^2 B)kN/ms

    asked by ashley on September 4, 2008
  92. quadratic

    what is -x^2+4=(3x-1)^2 in the form ax^2+bx+c=0

    asked by zachary on July 25, 2009
  93. Higher Maths

    Show that these three points , P(-8,3), Q(-3,4),R(-6,-7), Form a right angled triangle and name the right angle? There are two ways of doing this: 1) determine the slopes for all lines, and the pair that have a right angle will have a negative inverse

    asked by R0SS on September 1, 2005
  94. Chemistry

    When solid magnesium nitride reacts with water the reaction produces solid magnesium hydroxide and ammonia gas. If 22.9 grams of magnesium nitride are added to 31.0 grams of water, how many liters of ammonia should be produced (assuming standard

    asked by Jay on September 15, 2017
  95. Chemistry

    Hi I hope you can understand this...the Na ion is attached to the oxygen using ionic bonding. The \/ are meant to symbolize the hydrocarbon chain. The || is a double bond that bonds oxgen to carbon. O || Na O/\/\/\/\/\/ + CaCl2 -> ? + NaCl To give you some

    asked by Me on January 20, 2011
  96. Chemistry

    Thanks for the help earlier My question Silicon tetrachloride (SiCl4) can be prepared by heating Si in chlorine gas: Si + 2Cl2 yields SiCl4 In one reaction 0.507 mole of SiCl4 is produced. How many moles of molecular chlorine were used in the reaction? Ok

    asked by Kate on July 4, 2010
  97. math

    i posted this can you explain to me how to do this question i know i have to use differential equations but im not sure how to form an equation for inversely proportional question states grain is being poured at a steady rate to form a pile with height h,

    asked by lucy on February 1, 2010
  98. math

    i posted this can you explain to me how to do this question i know i have to use differential equations but im not sure how to form an equation for inversely proportional question states grain is being poured at a steady rate to form a pile with height h,

    asked by lucy on February 2, 2010
  99. math please help

    i posted this can you explain to me how to do this question i know i have to use differential equations but im not sure how to form an equation for inversely proportional question states grain is being poured at a steady rate to form a pile with height h,

    asked by lucy on February 2, 2010
  100. Chemistry

    Isopropyl alcohol, C3H7OH is an organic compound. It melts at -89 C and boils at 82.6 C. IT has a heat fusion of 88 J/g and a heat of vaporization of 733.33 J/g. The specific heat of liquid isopropyl alcohol is 2.68 J/g-C. The specific heat of its solid

    asked by Sean Tristan on May 16, 2016