1. visual

    how colour is form?

    asked by mishka on September 12, 2009
  2. math

    express the following in form of a+bi: (5i)(-3/5i)

    asked by aru on December 11, 2007
  3. Math

    What's 6/20 in simplest form? ( I know what simplest form is)

    asked by Dan on March 6, 2013
  4. beecham

    what is 5 over 9 + 5 over 12 in simplest form

    asked by semaj on April 30, 2014
  5. math

    what is three over seven in simplest form

    asked by Anonymous on August 24, 2010
  6. ms.sue help

    what is possessive form?

    asked by misty on November 5, 2015
  7. math

    what is the simplest form of 5 over 12

    asked by naja on September 27, 2010
  8. Trigonometry

    what is the trigonometric form of z=1+i?

    asked by Josh G. on December 2, 2012
  9. Math Can anyone check my answer please

    4z-24/6-z=-z,-4

    asked by Ashley A. on December 18, 2011
  10. doan

    what is the simplified form of x-1/3x-3 ?

    asked by anna on March 31, 2017
  11. Math

    What is the standard form of y+2=1/2(x-4)? a. x=2y=0 b. x-2y=8 c. 2x-y=10 d. -3x+2y=0

    asked by Zay on January 5, 2011
  12. AP Chem

    2) For a theoretical yield of 19 g and actual yield of 11 g, calculate the percent yield for a chemical reaction. Answer in units of %. 11 g / 19 g times 100 = 57.89% in your 2 sigfig problem, you might be expected to round off to 58%

    asked by Anonymous on October 29, 2013
  13. Chemistry

    Ranking equilibrium constants from largest to smallest according to an image?Ethene (C2H4) can be halogenated by the following reaction: C2H4 (g) + X2 (g) ->

    asked by L.Bianchessi on February 8, 2012
  14. Math

    Name the property that justifies each step. [(2x100)+(3x10)]+[(1x100)+(5x10)] = (2x100)=[(3x10)+(1x100)]+(5x10) I think this is Commutative = (2x100)+[(1x100)+(3x10)]+(5x10) I think this is Distributive property =[(2x100)+(1x100)]+[(3x10)+(5x10)] I think

    asked by B.B. on June 20, 2009
  15. personal finance

    Which of the following statements is correct? a)Stock is a form of debt capital b)Stock must be repaid at maturity c)Bonds are a form of debt capital d)Bonds do not have to be repaid at maturity IS C CORRECT ANSWER?THANK YOU:))))

    asked by vedrana on March 17, 2010
  16. Math

    The largest circular shape my piece of string can form has a diameter of 8 cm long. How long is the diameter of the largest circular shape that half my piece of string can form? A. 4/pi cm B. 8/pi cm C. 2 cm D. 4 cm Is D the answer ?

    asked by Leyla on August 7, 2018
  17. chemistry

    I got E) for the first and couldn't figure out the other one. Can any one verify the first and help with the second?? In which of the following processes is there a decrease in the potential energy of the substances involved? A) a coil spring is compressed

    asked by jake on January 13, 2011
  18. 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

    asked by j on July 20, 2011
  19. chemistry

    Nitrogen gas, N2, is usually a very inert gas and thus, is often employed in dry boxes. However, it would be a poor choice for use in a dry cell with which of the following substances? A) uranium metal B) Cu/Sn alloys C) Li metals D) Ca metals E) none of

    asked by blobface on April 22, 2007
  20. chemistry

    Hydrazine has the molecular formula N2H4 and is a volatile colourless liquid often used in industrial processes and as a rocket fuel. It has a single N–N bond in its structural formula. When hydrazine is heated it produces ammonia (NH3) and nitrogen (N2)

    asked by rebecca niles on January 25, 2011
  21. algebra

    Amy's project in metal shop class is to make a box (with no lid). Her shop teacher gave her a piece of metal that is 28 cm long and 20 cm wide. The assignment is to form the box by cutting squares out of each corner and bending the sides as shown below.

    asked by lexis green on May 9, 2012
  22. Algebra

    write the equation of the line in slope-intercept form given the slope and the coordinates of the y-intercept m = 3/7;(0, 8/3) find an equation of the line described below. write the equation in slope-intercept form (solved for y) when possible. through

    asked by Paris on December 7, 2017
  23. Math - Cubes

    Consider a cube of side 100cm. Consider two diaganolly opposite points (the main body diagnol) as A and B. The cube is kept flat on the ground, and is filled with water upto a 40cm height. Now, the cube is tilted such that AB is vertical. What's the height

    asked by Arora on December 29, 2017
  24. 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 =

    asked by k on December 16, 2016
  25. 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)

    asked by Anonymous on February 13, 2011
  26. 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

    asked by Rick on January 31, 2007
  27. Chemistry

    Does Na2CO3 have a methatesis reaction with NaCl, NaIO3, or Al2(SO4)3. If it does which one and why.

    asked by Mainland Community College on July 9, 2011
  28. chemistry

    Consider the following reaction Al(OH)3 + 3HCL ____>ALCL3 How many milliltres of 0.8 M HCL will react with 2g of AL(OH)3 ??

    asked by roro on April 7, 2011
  29. chemistry

    In the reaction ZnO+2HCl=ZnCl2+H2O what is oxidized and what is reduced?

    asked by amie on April 1, 2014
  30. chemistry

    How do you draw the structure of the reaction of 1-hexene with h2o in the presence of acid

    asked by michelle on November 13, 2013
  31. chemistry

    Write down the correct mechanism for the reaction between 3-methyl-2-pentene and HCL?

    asked by ben on February 19, 2011
  32. chemistry

    what is an ionic compound that forms an acid-base neutralization reaction?

    asked by megan on July 5, 2011
  33. inorganic chemistry

    what is the product of reaction dehydrated K3(Al(C2O4)3) with KMnO4 in the present of KOH?

    asked by Leo on April 27, 2013
  34. chemistry

    What would happen if water was added to a reaction mixture before letting it cool

    asked by noell on October 20, 2010
  35. AP Chemistry

    What is the redox reaction of (i don't understand how to do this): MnO4-(aq) + H2O2(aq) -> Mn2+(aq) + O2(g)

    asked by Anonymous on November 13, 2009
  36. science (PLEASE HELP)

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

    asked by Lily on November 3, 2011
  37. 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 .

    asked by chyenne on April 22, 2016
  38. chemistry

    Write the double-replacement reaction of PbCl2 reacting with Na2CO3.

    asked by bea on May 14, 2012
  39. Chemistry

    Calculate the equilibrium constant, k a reaction with delta G= -32.5 kj/mol at 25 degrees C

    asked by Malikai on July 10, 2013
  40. chemistry

    How many moles of electron are transferred per mole of this reaction? 6Li + N2-> @Li3N

    asked by Anonymous on October 31, 2010
  41. Analytical chemistry

    What is the reaction & calculation when KIO3 mixed with KI, HCl by titration with Na2S2O3?

    asked by Selim on July 8, 2011
  42. chemistry

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

    asked by AMY on November 29, 2007
  43. chemistry

    4.8g of Mg were burn in 3.2g of oxygen. The MgO produced at a mass of 8g what is the equation of the reaction

    asked by makwin on January 23, 2017
  44. Chemistry

    Calculate the change in heat for the reaction SO2 + 1/2O2 --> SO3

    asked by Mary on November 2, 2010
  45. chemistry

    DETERMINE the enthalpy for the reaction CH4(g)+NH3(g)->HCN(g)+3H2(g)

    asked by ISABEL on November 2, 2010
  46. chemistry

    i start with 10 g of zinc. I have 12.5 mass of oxide formed. How the reaction will increase

    asked by Anonymous on April 7, 2011
  47. 8th grade science

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

    asked by jess on December 21, 2010
  48. organic

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

    asked by johny on February 6, 2009
  49. chem

    Chromium(III) chloride(aq) + potassium sulfide(aq) what are the products of this reaction

    asked by sarah on April 30, 2013
  50. chemistry

    if 3.ooml of cyclohexanol were used in the dehydration reaction, what is the theoretical yield of cyclohexene?

    asked by Jill on November 2, 2010
  51. chem-carbs

    D-ribose is treated with a mild oxidizing agent. What is the product of this reaction?

    asked by casey on March 13, 2012
  52. chemistry

    write a reaction that show solid copper (II) nitrate dissociating.

    asked by P on March 27, 2014
  53. chem

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

    asked by mel on November 26, 2007
  54. chemistry

    For the reaction N2(g) + 3H2(g) 2NH3(g), what will happen if more ammonia gas is added?

    asked by aaron on February 3, 2016
  55. chemistry

    Write the double-replacement reaction of HgCl2 reacting with Na2CO3.

    asked by bea on May 14, 2012
  56. chemistory

    Please can some one help me balance this oxidation reaction. Mn4^- + C2O4 ^- => MnO2 + CO3 ^2-

    asked by Prof on September 13, 2015
  57. Chemistry

    Write a balanced chemical reaction showing how the 4.99 g Sn dissolves in HNO3.

    asked by Orangutan on April 28, 2010
  58. chemistry

    Which is the correct expression for Keq when the chemical reaction is as follows: N2 + 3H2 2NH3.

    asked by luis on November 16, 2015
  59. 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.

    asked by Amber on September 7, 2012
  60. Chemistry

    Explain in words what is happening in the reaction between copper and silver nitrate.

    asked by Anonymous on February 3, 2016
  61. science

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

    asked by debayan on August 23, 2016
  62. Chemistry

    For the reaction HNO3+HCl=NO2Cl+H20 What is the equilibrium constant at 25 C and 75 C

    asked by Tom on July 1, 2011
  63. science

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

    asked by mellly on April 6, 2010
  64. 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

    asked by leon on August 22, 2016
  65. chemistry

    Calculate the standard reduction potential for the reaction of Cu(III) to Cu(II) Use the following data: 1) Cu^+3 + 2e^- -> Cu^+, E°1 = 1.28 V 2) Cu^+2 + e^- -> Cu^+, E°2 = 0.15 V 3) Cu^+2 + 2e^- -> Cu(s), E°3 = 0.34 V 4) Cu^+ + e^- -> Cu(s), E°4 =

    asked by Katie on March 2, 2012
  66. chemistry

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

    asked by ashley on April 17, 2008
  67. Biology

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

    asked by Katie on August 24, 2008
  68. Chemistry

    Net Ionic Equation for reaction between bromide and silver nitrate

    asked by Teresa on April 23, 2013
  69. chemistry

    in a reversable reaction H2+I2=2HI,what will happen to the equilibrium if the volume is decrease?

    asked by Starsha on September 7, 2014
  70. chemistry

    estimate the enthalpy change for the following reaction: OF2 + H2O = O2 + 2HF

    asked by small on November 28, 2016
  71. biology

    How would lgiht reaction be affected if there were no concentration gradient across the thlykoid membrane?

    asked by Chandler on November 12, 2009
  72. chemistry

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

    asked by becca on January 22, 2009
  73. chemistry!

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

    asked by caroline on April 1, 2010
  74. chemistry

    how do you identify the base in this reaction? h2o(L) + CH3NH2(aq) yields OH-(aq) + CH3+(aq)

    asked by ryan on May 13, 2012
  75. chemistry

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

    asked by anon on October 28, 2016
  76. chemistry

    is energy considered a chemical reaction that is important to a healthcare professional

    asked by kathyann on June 29, 2011
  77. Chemistry

    What is undergoing oxidation in the redox reaction represented by Fe Fe3+ Cl2 Cl- Pt

    asked by Natalie on March 29, 2011
  78. Chemistry

    What is the molecular equation for the reaction between sodium (Na) and hydrochloric acid (HCl)?

    asked by Ton on November 3, 2009
  79. Chem Hmwrk

    For the reaction HCl + AgNO3 → ,write the balanced formula equation

    asked by Jena on October 11, 2012
  80. Chemistry

    Write an equation for the half-reaction in which a potassium atom, K, is oxidized. A) K + e- ----> K+ B) K ----> K+ + e- C) K- ----> K+ + 2 e- I think A

    asked by M, S, E on March 22, 2017
  81. Chem

    In the reaction that forms aluminum nitride from its elements, which element is being oxidized?

    asked by Dan on November 16, 2015
  82. chemistry

    For the electrolysis of molten potassium bromide: Write the equation for the overall reaction.

    asked by Shane on September 7, 2014
  83. chem

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

    asked by bryan on April 5, 2010
  84. chemistry

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

    asked by Emilie on April 21, 2016
  85. Chemistry

    Calculate the equilibrium constant for the following reaction at room temperature, 25 ∘C: N2(g)+O2(g)→2NO(g)

    asked by dave on June 21, 2013
  86. chemistry

    why would a polystyrene cup be used in an exothermic reaction between HCl and NaOH instead of a beaker?

    asked by Betsie on May 4, 2011
  87. chemistry

    According to the reaction below, how many grams of lithium oxide could be produced from 3.1 moles LiCl?

    asked by chemo on November 20, 2015
  88. phyicss

    Torque due to action reaction force is not zero true false

    asked by SAGAR on July 21, 2016
  89. Chemistry

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

    asked by Pedro on November 26, 2010
  90. chemistry

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

    asked by alex on March 23, 2010
  91. chemistry

    why the increasing in substrate concentration increase in the rate of reaction of enzymes.

    asked by Anonymous on June 21, 2012
  92. chem

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

    asked by moe on November 22, 2010
  93. chemistry

    calculatat400 would you expect the reaction to be more or less product oriented that at 350c?explain

    asked by anonymous on December 1, 2015
  94. Chemistry!

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

    asked by margrav2 on December 9, 2010
  95. Chemistry

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

    asked by Mariah on July 12, 2016
  96. 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?

    asked by Alex on September 20, 2016
  97. chemistry

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

    asked by Tina on November 18, 2010
  98. science

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

    asked by priya on May 21, 2014
  99. chemistry

    The reaction of chlorine (Cl2) with 1,4-dimethylcyclohexane (show three possible monochlorination products) *what?!*

    asked by Cerise on October 2, 2009
  100. Science

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

    asked by Christina on April 19, 2010