1. science

    For the reaction 2Na(s) + Cl(g) ¨2NaCl(s), how many grams of NaCl could be produced from 103.0 g of Na and 13.0 L of Cl (at STP)?

    asked by Ethan on November 13, 2009
  2. chemistry

    suggest an alternative indicator for the standardization reaction. Explain the rationale behind your choice.

    asked by josh on September 14, 2014
  3. College Chemistry..Urgent!


    asked by shanice on December 8, 2010
  4. chemistry

    Predict the products of the chemical reaction aluminum + iron(III) oxide

    asked by Pedro on December 5, 2010
  5. chemistry

    In the reaction 2SO2 (g) + O2 (g) 2SO3 (g), which change would cause the greatest increase in the concentration of SO3?

    asked by rachel on May 4, 2011
  6. chem uni

    Insert correct coefficients it is a redox reaction Al2+MnO2=Al2O3+Mn

    asked by CAMELA on February 14, 2015
  7. Chemistry

    The following reaction has a Delta G value of 42.6 kJ/mol at 25oC: HB(aq) +H2O(l) --> H3O+(aq) +B-(aq) Calculate Ka for the acid HB.

    asked by Jake on May 7, 2012
  8. physics

    Write down the unit in which reaction rate is measured in this observation? Equation is Zn(s)+I~ZnI

    asked by Refilwe on August 24, 2014
  9. science

    Calculate the energy released when 1 gram of uranium undergoes fission reaction

    asked by alphonse on May 4, 2017
  10. chemistry

    is there a chemical reaction that is used in everyday life that can go wrong? like lets say you add too much or one of the chemicals

    asked by lila on April 19, 2010
  11. chemistry

    How do i find the change in the moles gas for a reaction? example MgCO3 = MgO +CO2

    asked by Shea on November 2, 2010
  12. chemistry

    how many grams of Zn metal would you use to prepare 6.8g of zinc chloride according the reaction: Zn(s)+2HCl(aq)-> ZnCl2(aq)+H2(g)

    asked by jane on March 10, 2016
  13. Chemistry

    how many joules and calories are produced from the reaction CaCl2+H2O=HCl+CaOH

    asked by Gabe on April 24, 2013
  14. chm

    What is the theoretical yield of iron if we begin the reaction with 10.5g of AL (assume an excess of Fe2)3)

    asked by karol on October 21, 2011
  15. College Chemistry Really Need Help


    asked by KEVIN on December 8, 2010
  16. Chemistry

    What is the theoretical justifaction for the order of reaction rates of a cycloalkane, cycloalkene, and benzene?

    asked by Olivia on December 8, 2010
  17. chemistry

    Where can I find the reaction that produces ethyl formate, which is Methanol and Methanoic acid?

    asked by Johnathan on April 26, 2008


    asked by SHANICE on December 7, 2010
  19. chemistry

    Raising the temperature of a reacting system increases the rate of the reaction, but does NOT increase the:

    asked by ray on October 1, 2015
  20. Chemistry

    For the following battery: Cd(s) | CdCl2(aq) || Cl–(aq) | Cl2(l) | C(s) Write the reduction half reaction for the C(s) electrode.

    asked by Jematormal91 on May 11, 2012
  21. chemistry

    how many grams of Zn metal would you use to prepare 6.8g of zinc chloride according the reaction: Zn(s)+2HCl(aq)-> ZnCl2(aq)+H2(g)

    asked by jane on March 10, 2016
  22. Chemistry

    Balance the following redox reaction in basic solution. H2(g)+Fe3+(aq) ---> H2O(l)+Fe2+(aq)

    asked by Anonymous on October 23, 2016
  23. chemistry

    write a balanced equation for the reaction between sulfuric acid and calcium metal

    asked by ryan on May 13, 2012
  24. Chemistry

    determine the redox reaction represented by the following cell notation Mg Mg2 Cu2 Cu

    asked by Natalie on March 29, 2011
  25. communication

    What would be the reaction of a reader if the topic sentence in an essay did not coincide with the supporting points

    asked by mary on November 23, 2010
  26. chem

    Explain clearly why changes in base concentration do not affect the observed reaction rate of an E1 elimination.

    asked by tim on October 24, 2011
  27. chemistry

    Balance equation and type of reaction thx! 1. Al(HSO3)3 + O2 ---> 2. Ag + Cu(NO3)2 ---> 3. N2O4 --->

    asked by cindy on October 30, 2013
  28. chemistry

    At 25C, Kc= 3.7x10^9 for the reaction CO(g) + Cl2(g) equilibrium with COCl2(g) Calculate the Kp at this temperature.

    asked by Wolf on October 9, 2007
  29. CHEM

    4.69 of S is reaction with oxygen calculate the volume of SO2 in mL formed at 33 degrees C and 1.14 atm

    asked by aPRIL on June 5, 2012
  30. Chemistry

    The reaction rate triples when the temperature increases from 15 to 35 degree C. What is the activation energy?

    asked by Darcy on April 8, 2010
  31. Chemistry

    What would be the products of this chemical reaction?? Co(NO3)2 (aq) + NH3 (aq) = ?????? a precipitate is supposed to be formed.

    asked by Anna on October 18, 2011
  32. physics

    using newtons third law explain what is meant by action and reaction pairs of forcess

    asked by Anonymous on September 29, 2011
  33. Chemistry

    Given the following hypothetical equations, 2A + B → 3C + 2D ΔH = -46.7kJ C → B ΔH = 13.1kJ 2E → B ΔH = 84.5kJ, what is the enthalpy change (kJ) for the following reaction? A → D + 2E

    asked by John on March 8, 2012
  34. Help

    Fibrin is produced when the blood components called what start chain reaction

    asked by Please on December 3, 2010
  35. Chemistry

    A chemist requires 0.780 mol Na2CO3 for a reaction. How many grams does this correspond to?

    asked by Tisha on October 2, 2012
  36. Chemistry--help me, please

    how would you separate Fe3+ from Ba2+ in a mixture? Please explain and give an equation for reaction.

    asked by Rocio on October 30, 2010
  37. Chemistry

    Solve with half equation reaction SO3 2- + MnO4 -=SO4 2- + Mn2+

    asked by Kabih kush on November 5, 2015
  38. Chemistry

    The equilibrium constant for the following reaction is 7.2 x 10-10. What is the [H+] in a solution 1.0 M of this acid? HCN + H2O --> H3O+ + CN-

    asked by Andrea on May 14, 2012
  39. college chem

    How do i write the overall reaction equation for the synthesis of aluminum potassium sulphate dodecahydrate

    asked by Anonymous on June 26, 2012
  40. Chemistry

    given: 25.9 kJ + 1/2 H2 + 1/2 I2 => HI how much energy is needed for the reaction of 4.57x10^24 molecules of iodine, I2, with excess hydrogen, H2?

    asked by Zack on December 19, 2012
  41. chemistry

    Describe three ways you might be able to speed the reaction of CH4+Cl2 -> CH2Cl2+HCl

    asked by John on March 30, 2010

    REDOX balancing reaction Cr2O7 + NO-2 Cr3+ + NO3 (acid medium)

    asked by SUNDAY LEVI on November 22, 2017
  43. Biology

    How can you explain that Biurets reaction with amino acids as compared to other protein substances?

    asked by Tommy on November 4, 2007
  44. Chemistry

    Give reasons why the reaction between benzoylchloride and methanol do not attack carbon from the ring

    asked by Destiny on June 5, 2014
  45. Chem

    If a reaction has a change of H of -120.0 kcals/mole and is spontaneous for all temperatures less than 200.0K, what is its ΔS?

    asked by Drew on April 30, 2016
  46. Chemistry please help!

    Calculate (triangle)H for the following gas-phase reaction: 2 H-C (3dashes) C-H + 5 O=O --> 4 O=C=O = 2 H-O-H -Using bond energies

    asked by Erin on April 6, 2017
  47. Chemistry

    Which element is oxidized in this reaction? Fe2O3+ 3CO-(arrow)2Fe+3CO2

    asked by Rose on October 5, 2009
  48. Organic Chem

    Write a balanced equation showing the reaction of trimyristin and aqueous NaOH

    asked by Ruth on October 11, 2011
  49. Science

    Why is the formation of iron hydroxide, Fe(OH)2, from Fe2+ and OH- not considered an oxidation-reduction reaction?

    asked by Nancy on March 11, 2008
  50. Science

    Why do all salts crystals have a distinctive cubic shape? And what happens to these atoms during this chemical reaction?

    asked by Emily on February 29, 2008
  51. Chemistry

    Balance the reaction step-wise: As2S3(s) + NO3^- + H^+(aq) to AsO4(aq) + S(s) + NO(g) + H2O(l)

    asked by Subhan on April 19, 2016
  52. chemistry

    Separate this redox reaction into its component half-reactions. O2 + 2Zn -->2ZnO

    asked by Anonymous on February 24, 2012
  53. Chemistry

    For the following reaction, identify the substance being oxidized and reduced CH4 + 2 O2 = CO2 + 2 H2O

    asked by Dylan on July 6, 2016
  54. chemistry

    Balance the following redox reaction by inserting the appropriate coefficients. H^+ +CrO4^2- +NO 2^- =Cr^3+ +H2O+NO3^-

    asked by lee on April 19, 2013
  55. Chemistry

    How many liters of Co2(g) can be produced in the reaction of 5.24 L and 2.65 L O2 (g) if all these gases are measure at the temperature and pressure?

    asked by Grace Peterson on October 27, 2013
  56. Chemistry

    Enter the Net Ionic Equation including phases, for the reaction of AgNO3 and Ba(OH)2.

    asked by Brittany on April 12, 2010
  57. chemistry

    what are the phases of all the reactants and products in the reaction 2Al + Fe2O3--->2Fe + Al2O3?

    asked by bethany on October 5, 2011
  58. chemistry

    The reaction SO2 + 1/2O2 -->SO3 has kp equal to 6.55 at 627C. what is the value of kc at this temperature? how do you set this up?

    asked by Anna on April 15, 2010
  59. chemistry

    Write a balanced equation for the reaction of liquid bromine with chlorine gas.

    asked by annie on November 30, 2016
  60. Chemistry

    How much heat is associated with the burning of 2.27 g of methane in the following unbalanced reaction: CH4(g) + O2(g) →CO2(g) + H2O(g)?

    asked by John on March 8, 2012
  61. chemistry

    are this 2 equations the same NIE? and if not how come? Write a net ionic equation for the reaction that occurs when aqueous solutions of ammonia and acetic acid are combined. Write a net ionic equation for the reaction that occurs when aqueous solutions

    asked by savannah on November 18, 2011
  62. chemsitry dr Bob

    Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to

    asked by KYson on November 9, 2015
  63. chemsitry dr Bob

    Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to

    asked by KYson on November 9, 2015
  64. Chemistry

    Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to

    asked by KYson on November 10, 2015
  65. Math

    What operation is used to change a fraction in simplest form to an equivalent fraction? What operation is used to change a fraction to simplest form?

    asked by Marilyn on March 16, 2011
  66. Spanish

    Please correct my work please: This is what I'm working on: Command form(imperative mood)negative familiar/polite. I have to change the following affirmative commands to the negative form. (write the word no, the object pronoun(s), and the negative command

    asked by John on May 10, 2008
  67. Chemistry

    I'm having a bit of trouble translating what I see when I perform the experiment into actual chemical reactions. In one experiment, Magnesium is placed in Hydrochloric acid, and a burning splint is extinguished. So I think that it is producing Magnesium

    asked by Prasa on September 28, 2007
  68. math

    Students noticed that the path of water from a water fountain seemed to form a parabolic arc. They set a flat surface at the level of the water spout and measured the maximum height of the water from the flat surface as 6 inches and the distance from the

    asked by Anne on November 14, 2016
  69. science

    How does the structure if an atom relate to how electric charges form? I don't quite understand the question. All electrons and protons have charges. The charges do not "form", they are already there. They are part of every atom. The attraction between

    asked by Jesie on January 12, 2007
  70. ms.sue, help with presentation

    okay in my powerpoint presentation i have to only have approx. five lines per slide with five words per bulleted item. i have to describe the ten commandments to a kid that is 9. i know the following : the ten commandments, or Decalogue are like passages

    asked by kailin on January 16, 2007
  71. chem expirement!

    You are required to design an experiment to test Hess's law using the combustion of ethanol. Write a brief design for this experiment. What I wrote as my answer: Hess’ Law: is the algebraic addition of chemical equations yields a net equation whose

    asked by rob on May 17, 2007
  72. algebra1

    What steps do I take in solving this problem? It is about graphing inequalities. 10x+4¡Ý9x+17 put the equation in the form of y ? x + constant. ? means greater than or less than. That is the first step. You are getting no more help until you start

    asked by keshia on March 23, 2007
  73. chem

    if ferric chloride was added to an unknown which happened to be benzophenone to identify if it has the phenol functional grp...will the sol'n turn purple (it contains the phenol) or yellow(does not contain phenol)? Benzophenone is a ketone and ketones

    asked by kim on November 18, 2006
  74. Chemistry

    Consider the following reaction: CaCO3(s)→CaO(s)+CO2(g). Estimate ΔG∘ for this reaction at each of the following temperatures. (Assume that ΔH∘ and ΔS∘ do not change too much within the given temperature range.) for 310K,1070,1470 this is what i

    asked by Ty on May 19, 2014
  75. Chemistry

    Iron (III) Oxide reacts with Aluminum to form Aluminum Oxide and Iron. If I have 255 g of Aluminum and unlimited Iron (III) oxide, how many grams of Iron will form? I am really not sure how to work with this. What does it mean when it says that the iron is

    asked by Erin on January 22, 2017
  76. Math

    Hello, I have an assignment where I have to create a model/sculpture and I am faced with this question during the analysis: Determine the scale you will need to use to render your design in a 3D model. Explain your choice. And: Determine the scale you will

    asked by Max on December 1, 2017
  77. Chemistry

    Compound 1 Compound 2 O || CH2=CH-CH-OH + CH3-CH-CH2-C | | | CH3 CH3 OH | | ? (i) identify any functional groups in compounds 1 & 2 by circling them and naming them clearly. (ii) complete the equation for reaction 1 by drawing the abbreviated structural

    asked by Desmond on March 8, 2007
  78. Algebra 1 ( bobpursley)

    1. Write an equation in slope-intercept form for the line that passes through (5,0) and is perpendicular to the line given by y = -5/2x + 6. A: m = 2/5 y = mx + b 0 = (2/5)(5) + b 0 = 2 + b b = -2 y = 2x/5 -2? 2. Write an equation in slope-intercept form

    asked by Please, help me! This is urgent! on December 3, 2013
  79. Chemistry

    . For the reaction 2H2(g) + 2NO(g) → N2(g) + 2H2O(g) The observed rate law is Rate =k[NO]2[H2] The mechanisms shown below have been proposed to explain the kinetics of the above reaction Which of the following are acceptable mechanisms? Explain you

    asked by m on March 6, 2013

    1.Is the group of words a simple sentence, a compound sentence, a run-on sentence, or a sentence fragment? Her computer has new software, it runs much faster now. A. run-on sentence B. sentence fragment** C. compound sentence D. simple sentence 2.Is the

    asked by SKI on January 23, 2015
  81. Pre-Calculus

    The Richtr scale was evied y Cahrles F.Richter a American geologist. The scale is based on the equation M(x)=logx/x0(little 0), where x is the seismographic reading of the earthquake and x0 i 1 miron 0.001mm (the seismographic reading of a zero-level

    asked by Andy on December 21, 2009
  82. Chemistry

    The spectrophometer was used to measure the absorbance of each of a series of [FeSa]+ solutions. A standard curve was construnceted by plotting the absorbance vs. concentration (M). The slope and y-intercept were found to be 1496 M-1 and .003,

    asked by Erin on April 2, 2017
  83. Chemistry

    1. Molarity is to moles of solute over liters of solution as molality is to A. molar concentration over molal concentration. B. moles of solute over kilograms of solvent. C. molal concentration over molar concentration. D. moles of solute over moles of

    asked by Jack on September 23, 2011
  84. math

    Could someone double check my answers. 1. Write the number in expanded form 684 answer: (6x100)+(8x10)+(4x1) 2.Give the place value for the indicated digit 8 in the number 138,350 answer: thousands 3. Write the following in the standard form of a number

    asked by Kim S. on February 9, 2008
  85. s103

    Reaction 1 O ll CH2=CH-CH-OH + CH3-CH-CH2-C l l l CH3 CH3 OH compound 1 compound 2 Products? identify any functional groups in compounds 1&2, circle them and name them clearly? complete the equation for reation 1 by drawing the abbreviated structural

    asked by Pedro on March 7, 2007
  86. Chem Dr. Bob Plz

    Dr. Bob, I just did a home lab with citric acid and sodium bicarbonate and had to put them in cups and measure before and after.. I put 1.02g of sodium bicarbonate in a cup with water and stirrer (54.66g) then added .77g of citric acid and supposed to add

    asked by Jennie on March 4, 2015
  87. Chemsitry

    Hello. I'm not n=sure about these answers so i was wondering if someone could check them out? 27, A: Which is a stronger acid - sulfuric or carbonic acid? (Answer: Sulfuric acid.) 27, B: Imagine you have two glasses. One contains a solution of carbonic

    asked by CRCAWF on May 11, 2009
  88. chemistry

    Consider the following reagents: zinc, copper, mercury (density: 13.6 g/mL), silver nitrate solution, nitric acid solution. a. Given a 500-mL Erlenmeyer flask and a balloon can you combine two or more of the foregoing reagents to initiate a chemical

    asked by kate on July 7, 2015
  89. algebra

    Write in Simply form: Can you help? 6x^2+13x+6/3x^2+x-2=

    asked by Shun on June 28, 2011
  90. Math Help

    write in decimal form 2.158x10^9

    asked by Anonymous on July 16, 2014
  91. algebra

    What is 32 expressed in simplest radical form?

    asked by Bobby on January 28, 2010
  92. Algebra

    what is the cube root of 14 in radical form

    asked by Susie on March 29, 2017
  93. america past and present

    before 1910 the most popular form of entertainment was what?

    asked by ronda on April 30, 2013
  94. Algebra 2

    could you please tell me how to turn this into simple radical form 2(3^(2^-1)-1)^-1

    asked by Jen on May 31, 2009
  95. Pre-Cal

    convert è = -2 to rectangular equation form

    asked by Anonymous on May 27, 2013
  96. Algebra 1B

    How do you write x³ = 100 in log form?

    asked by Kim on May 15, 2014
  97. English

    Is it possible to form sentences with just nouns and verbs?

    asked by Shelby on April 8, 2008
  98. math

    What is the expanded form for 17,500 mph

    asked by Dalida on February 21, 2011
  99. math

    what is 5/6 divided by 2/3 multiplied by 4/5 in simplest form?

    asked by bryce on December 19, 2012
  100. math

    express 3x^2+2x+1 in the form a(x+p)^2+q where a, p and q are real numbers

    asked by Cathrine on January 25, 2010