1. Chemistry

    Robin the Research scientist prepares 100 mLs of a solution of 100 mM of Tris HCl. What is the pH? I am confused since we do not know the conjugate base concentration so how to solve for the pH

    asked by Aarya Singh on January 31, 2017
  2. chemistry

    Ba(OH)2(aq) + HCl(aq) BaCl2(aq) + H2O (g) Consider the unbalanced equation above. What is the concentration of the original hydrochloric acid solution if 18.0 mL of the acid reacts with 45.5 mL of 0.280 M barium hydroxide?

    asked by zack on June 20, 2016
  3. Chemsitry

    For a particular redox reaction NO2– is oxidized to NO3– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in basic solution. Phases are optional.

    asked by Connor on April 1, 2013
  4. chemistry

    If the 12.5ml of NaOH solution is required to react completely with 0.300g of KHP (Potassium Hydrogen Phthalate, 204.2g/mol). What is the molarity of NaOH?

    asked by paul on December 11, 2012
  5. Chemistry

    When 0.078 moles of aluminum sulfate are dissolved in enough water to make 634 milliliters of solution, what is the molarity of sulfate ions? Answer in units of M.

    asked by Cheyenne on September 23, 2010
  6. AP Chemistry

    A 500ml saturated solution of MgCO3 (M=84) is reduced to 120 ml by evaporation. What mass of solid MgCO3 is formed? The answer is 0.20g, I just need a detailed explanation. Thanks!

    asked by John on April 1, 2011
  7. chem

    The accepted density of the sugar solution is 1.392 g/mL . Based on the average value of each data set, rank the data sets in decreasing order of accuracy.

    asked by Anonymous on September 20, 2015
  8. Chemistry

    in a neutralization reaction, dilute tetraoxosulphate (vi) acid completely reacted with sodium hydroxide solution.write a balanced chemical equation for the reaction

    asked by Donniceski on March 14, 2017
  9. Chemistry

    If 2moles of electrons are required to oxidize 1 mole of unknown, what is the molarity of the unknown solution Normality: 0.638 In this experiment: MnO4- is reduced to Mn2+

    asked by unknown on April 9, 2008
  10. chemistry

    suppose 100 g of lead nitrate salt is added to enough water to make 1 L of solution, what is the concentration of the lead ion in the moles per liter in each of the solutions?

    asked by Anonymous on September 29, 2010
  11. Chem

    In a titration process it takes 22.00 mL of nitric acid to neutralize 16.70 mL of 0.200 M calcium hydroxide solution. what is the balanced equation and what is the molarity of the acid. please explain

    asked by Piper on June 13, 2012
  12. chemistry

    suppose 100 g of lead nitrate salt is added to enough water to make 1 L of solution, what is the concentration of the lead ion in the moles per liter in each of the solutions?

    asked by Anonymous on September 29, 2010
  13. Chemistry

    If one wanted to a make a 500.0 mL of 4.5 x 10-6M solution of this red dye, how many grams would they need to weigh out? The molar mass of the dye is 492 g/mol. SHOW WORK.

    asked by Steven on February 16, 2017
  14. Chemistry

    In every electrolytic and galvanic (voltaic) cell the anode is that electrode (A) at which oxidation occurs. (B) which attracts cations. (C) at which electrons are supplied to the solution. (D) at which reduction occurs.

    asked by LT on May 12, 2008
  15. chemistry

    A 20.0 mL sample of 0.687 M HBr is titrated with a 0.216 M NaOH solution. The pH after the addition of 10.0 mL of NaOH is __________. A. 0.413 B. 0.386 C. 0.163 D. 0.579 E. 0.237

    asked by katie on July 24, 2012
  16. Chemistry

    What is the concentration of an HCl solution if 23.1 mL of HCl are needed to neutralize completely 35.0 mL of 0.101 M Ba(OH)2 I cannot get the right answer (Macic)(23.1mL)=(0.101M)(35.0mL) Macid = .153

    asked by corey on December 5, 2011
  17. AP CHEMISTRY

    30.0 mL of 0.10 M Ca(NO3)2 and 15.0 mL of 0.20 M Na3PO4 solutions are mixed. After the reaction is complete, which of these ions has the lowest concentration in the final solution? A) Na+ B) NO3- C) Ca+2 D) PO4-3 Answer is C.. How do you solve it though?!

    asked by Ash on April 3, 2013
  18. chemistry

    When referring to percent ionization values given in a acid/base table, how to determine what is the hydrogen ion concentration of a 0.10 mol/L solution of hydrofluoric acid?

    asked by Jay on April 8, 2008
  19. chemistry

    What mass of cesium bromine must be added to a 0.500 liter of water (d=1.00 g/ml) to produce a 0.981m solution? what are the mole fraction and mass percent of CsBr?

    asked by sabrina on September 8, 2014
  20. Chemistry

    If the unknown tri protic acid has an equivalent weight of 46.79 g/equiv, its average molecular weight is ?g/mol and ?g would be required to make 100.00 mL of a 1.50 N solution.

    asked by mia on April 2, 2008
  21. chemistry

    How many grams of potassium hydrogen phthalate should be added to a 100 mL volumetric flask to prepare a 0.5000 M solution when the flask is diluted to the mark with water?

    asked by Shell on May 19, 2011
  22. Chemistry

    A 0.225g sample of a weak monoprotic acid requires 37.50 mL of 0.100 M NaOH solution to reach the equivalence point. What is the molar mass of the acid?

    asked by Sarah on April 11, 2011
  23. chemistry

    A 0.100 M solution of K2SO4 would contain the same total ion concentration as which of the following solutions? A. 0.0800 M Na2CO3 B. 0.100 M NaCl C. 0.0750 M Na3PO4 D. 0.0500 M NaOH

    asked by Michael on March 27, 2012
  24. math

    The farmer wants to use the 500 m to an enclosure divided into two equal areas, What is the total maximum area that can is achieved with the 500 m fence. using differential calculus to the solution.

    asked by gordana on September 14, 2014
  25. College Math II

    Show a complete solution to each problem. Find the exact length of the side of a square whose diagonal is 3 feet. I am having problems understanding how you figure out this problem. Can someone help me? Thanks.

    asked by Lori on November 21, 2009
  26. Chemistry PLEASE HELP!

    When 0.042 moles of aluminum sulfate are dissolved in enough water to make 763 milliliters of solution, what is the molarity of sulfate ions? Answer in units of M.

    asked by Mike on October 11, 2010
  27. math

    Find the exact value of the volume of a can of green beans with a diameter 8 centimeters and height of 12 centimeters. Include correct units with your solution. Use "pi" in place of the pi symbol.

    asked by kozy on May 8, 2011
  28. Chemistry

    Sacchirin is a monoprotic acid. If the pH of a 1.50x10^-2M solution of this acid is 5.53, what is the Ka of saccharin? (the answer is 5.8x10^-10) I know we're supposed to use the Henderson Hasselbach equation to solve for the [H+] from pH, but what's next?

    asked by howie on May 27, 2008
  29. Science

    How many grams of hydrogen chloride are percent in 250cm3 of comercial 37% by mass hydro chloric acid solution? The density of the acid is 1.19gram/cm3.

    asked by Anonymous on July 26, 2016
  30. Biology

    Please Explain thoroughly. A cell exists in a solution of 10% salt and has an internal concentration of 90% salt. Draw this scenario. Label its tonicity. Show where water would flow.

    asked by Drake on March 6, 2014
  31. Canada Government

    I learn about canada government. I from India. There questions I don't understand. 1. Why do some politicians think that the senate should be reformed? Identify a possible solution to the issue of Senate reform.

    asked by Aishwariya on March 29, 2011
  32. Chemistry

    Marcela dissolves 80.0 g of ammonium nitrate in 50.0 mL of water at room temperature and notes that the temperature of the solution decreases by 5.0°C. Which correctly designates the signs of changes of G, S and H for this reaction?

    asked by Damon on July 16, 2016
  33. chemistry

    When 0.025 moles of aluminum sulfate are dissolved in enough water to make 115 milliliters of solution, what is the molarity of sulfate ions? Answer in units of M

    asked by cheri on September 13, 2012
  34. chemistry

    Complete the mass balance expression for a saturated solution of Ag2CO3. Note at least one blank is a numeric coefficient. (Note: Ignore any subsequent reactions of Ag .)

    asked by Lana on May 19, 2013
  35. chemistry

    A 0.109g sample of a pure gaseous compound occupies 112ml at 100degrees and 750torr: what is the molecular weight of the compound. ANS=(30.2g,mol). Please I need the solution

    asked by charles on March 21, 2016
  36. chemistryt

    A solution with a volume of 1·00 dm3 is saturated with lead iodide, Pbl2. The concentration of iodide ions is 2·7 mol dm–3.Determine the solubility product of PbI2. 

    asked by sayan on June 5, 2017
  37. CHEMISTRY

    SORRY ADD ON TO MY PREVIOUS QUESTION. I ALSO NEED TO WORK OUT THE PH OF THE SULFURIC ACID SOLUTION. http://www.jiskha.com/search/search.cgi?query=21g

    asked by Desmond on March 8, 2007
  38. chemistry

    0.10 M potassium chromate is slowly added to a solution containing 0.50 M AgNO3 and 0.50 M Ba(NO3)2. What is the Ag+ concentration when BaCrO4 just starts to precipitate? The Ksp for Ag2CrO4 and BaCrO4 are 1.1 x 10-12 and 1.2x10^-10 respectively

    asked by emoni on January 16, 2011
  39. motion problem

    A man rowed 30km downstream. it took him 2hrs more time in going back than in going downstream. if the current is 2kph, what is his speed in still water? (with solution pls... tnx)

    asked by MNHS MNHS on November 12, 2013
  40. CHEMISTRY

    Using a 0.20 M phosphate buffer with a pH of 6.5, you add 0.72 mL of 0.46 M NaOH to 58 mL of the buffer. What is the new pH of the solution? (Enter your answer to three significant figures.) I don't even know where to begin!! I just need a set up of the

    asked by Mack on March 3, 2015
  41. Chemistry

    a 40.0 ml sample of ca(oh)2 was titrated with 0.0704 m hcl. the volume of hcl needed to reach equivalence point was 18.2 ml. what was the concentration of ca2+ present in the original solution?4

    asked by Dahnrae on April 22, 2015
  42. physics

    a body displaced 12m due to east 5m due to north then 9m vertically upward what is the resultant displacement?solution with complete reason n figure

    asked by armando on August 12, 2011
  43. Chemistry

    In studying the chemistry and qualitative analysis of anions, why wouldn't HCl be a good acid to use to determine the solubility of a silver precipitate in acid solution?

    asked by Matt on April 29, 2010
  44. chemistry

    an auto mechanic spills 85 mL of 2.4 M H2SO4 solution from a rebuilt auto battery. how many mL of 1.2 M NaHCO3 must be poured on the spill to react completely with the sulfuric acid?

    asked by james on November 3, 2008
  45. trigonometry

    Can you draw the The solution for this: Establishing identities 1.) Sin²∅ (1+cot²∅) = 1 2.) (tan²B+1) cos²B = 1 3.) tan x ---------- = sin x sec x 4.) 1 1 ------- + ------- = 2csc²∅ 1+cos∅ 1-cos Please help me, i cant understand it.

    asked by alyn on January 20, 2015
  46. SCIENCE

    AIR IS A COMPOUND of nitogen,oxygen,argon,carbon dioxide,ane other gases.how may air be best described? a)a compund b)a mixture c)a solution d)an alloy e)an amalgam

    asked by jessica on October 3, 2007
  47. chemistry

    it is desired to prepare 250.0mL of a standard solution having a concentration of 0.1000M AgNo3. How many grams of a sample of AgNO3 of 98.8% purity are required for this purpose?

    asked by T on March 25, 2010
  48. Sci

    when a large amount of FeCl3 is dissolved in water, a clear solution is formed at the beginning but eventually a precipitate is formed. Why? Explain with chemical equation.

    asked by T on March 2, 2013
  49. chemistry

    it is desired to prepare 250.0mL of a standard solution having a concentration of 0.1000M AgNo3. How many grams of a sample of AgNO3 of 98.8% purity are required for this purpose?

    asked by T on March 25, 2010
  50. chemistry

    A compound has the empirical formula CH2O. When 0.0866 g is dissolved in 1.0 g of ether, the solution’s boiling pint is 36.5oC. Determine the molecular formula of this substance

    asked by Danica on October 1, 2012
  51. chemistry

    One gram of pbcl2 is dissolved in 1.0 l of hot water. When the solution is cooled to 25degrees Celsius, will some of the pbcl2 crystallize out? If so, how much? I just don't know where to start/ where to go with this problem Any help is appreciated!!

    asked by Anonymous on March 24, 2015
  52. Chemistry

    Use the method of half reactions to balance the oxidation half reaction in acid solution as well as provide the oxidized and reduced reactants. Cr2O7 {2-} (aq) + F{-} (aq) = Cr {3+} (aq) + F2(aq) Charges are in { }

    asked by Kevin on March 15, 2016
  53. chemistry please

    find molar concentration of the solution. .128 g of benzophenone and fill in a beaker with ethanol to the 50.00mL line i came up with 3.5 x 10^-5 (0.128)(1/182.217)(.049872)

    asked by john on February 1, 2009
  54. chem

    find molar concentration of the solution. .128 g of benzophenone and fill in a beaker with ethanol to the 50.00mL line i came up with 3.5 x 10^-5 (0.128)(1/182.217)(.049872)

    asked by john on February 1, 2009
  55. Chemistry

    For the strong acids find the [H3O]and [OH] in a solution that is .785% HNO3 by mass (assume a density of 1.01 g/ml). If someone could offer step by step instructions, that would be terrific!

    asked by Beth on April 29, 2012
  56. chemistry

    50ml of 20.8% bacl2 and 100ml of 9.8% h2s04 solutions are mixed. Molarity of cl ions in the resulting solution wt of ba =137 I do not still understand step by step clearly Thank a lot

    asked by Ken on November 23, 2014
  57. chemistry

    A 0.5215 gram sample of CaCO3 is dissolved in 12M HCl and the resulting solution is diluted to 250.0 mL in a volumetric flask. How many moles of CaCO3 are used?

    asked by saddee on April 28, 2009
  58. Chemistry

    Pyridine, a substance used as a catalyst in some synthetic reactions is a very weak base its degree of ionization is equal to 0.03% in solution 0.02 mol L -¹. Determine the ionization constant.

    asked by Michael on February 23, 2016
  59. math

    Describe a simple process for using rates and unit prices that might help someone who is having difficulty understanding these concepts. Include either an example from the text or one of your own examples to explain the solution process. I need help

    asked by on June 30, 2010
  60. Algebra

    find three consecutive positive even integers such that the product of the second and third integers is twenty more than ten times the first integer. [only an algebraic solution can give full credit]

    asked by Alexis on May 23, 2010
  61. chemistry

    At what point in the concentration of the weak acid or conjugate base does the buffer solution stop resisting a PH change when strong acid is added ? Thank for helping

    asked by Namis on October 23, 2011
  62. Chemistry

    Problem: A gaseous mixture of O2 and Kr has a density of 1.181 g/L at 485 torr and 300. K. What is the mole percent O2 in the mixture? Attempt: I have tried everything possible that I know and I can't get anywhere close to the solution. d=m/v=pM/RT...

    asked by Chase on August 28, 2007
  63. Chemistry

    Describe in detail how you would make one molar solution of sodium chloride. Do I add the atomic masses of Na and Cl and then find the mols? And the after that you would just add 1L of water, correct?

    asked by ~Brittney~ on August 28, 2007
  64. Chem

    Write the balanced net ionic equations for the reaction of a) added H+ and B) added OH- with the components of the acetic acid/sodium acetate buffer solution:

    asked by Bubba on February 9, 2011
  65. Chemistry

    A student prepared 200mL of 0.01M solution of calcium phosphate, Can(PO4)2. What is the concentration of calcium in parts per million? Relative atomic masses Can =40, P =31, O =16

    asked by Sylvia on April 9, 2018
  66. Physics

    A 4600 kg helicopter accelerated upward at 5 m/s^2. What lift force is exerted by the air on the propellers? --Would the downward force of gravity play a part in the solution?

    asked by Anonymous on September 19, 2007
  67. chemistry

    when 12.76mL of HCl of unknown concentration (but less than the base) are reacted with 15mL of 3.254M NaOH, 1.68kJ of heat are released. What is the molarity of the HCl solution?

    asked by serena on November 23, 2010
  68. Chemistry

    The density of concentrated sulfuric acid is 1.84 g/mL. If this corresponds to 18 M, what is the molality of the solution? Molar mass= 98. 98 x 18 =1764g/L - 1.84 =1762.16/1000 = 1.76 kg 18/1.76=10.23 m But my only options are: a) 18 m b) 95.5 m c) 240 m

    asked by ramire2 on May 5, 2013
  69. math

    pls help me proffesors! I need solution to this question, please show me the steps involve. The mean of the scores of three students in a class is 9. If the modal score is 11, find the lowest score.

    asked by Banko on November 29, 2016
  70. Reading Comp.

    When we have too much work to do we become very anxious It is vital to set priorities and work on the most important things first. What does the second sentence do? a. It gives an example b. It makes a contrast c. It proposes a solution* d. It states an

    asked by Arlynn on March 28, 2011
  71. calculus

    Use the Intermediate Value Theorem to prove that the equation has a solution. Then use a graphing calculator or computer grapher to solve the equation. 2x^3-2x^2-2x+1=0 i am completely lost & have no idea where to start.

    asked by Kelly on February 3, 2011
  72. Chemistry

    What will be the volume of concentrated H2SO4 that must be added to 155 mL of 0.1996 N H2SO4 in a 500 mL volumetric flask so that the resulting solution will be 6.5210 M? pls. explain.

    asked by Summer on January 21, 2014
  73. Chemistry

    What is the maximum mass of copper(ii) sulphate pentahydrate, CuSO4.5H2O, which could be obtained by crystallizing the solution? Ar: H=1; O=16; S=32; Cu=63.5 I'm not looking for someone to do it all, although that would help. Just that someone could give

    asked by Owen on December 3, 2015
  74. Chemistry

    You dissolve 0.213 g of acid in 25.0 mL of water. To react the acidic solution to the endpoint you add 23.80 mL of 0.1024 M NaOH. Determine the molar mass of the acid.

    asked by Andres on October 28, 2011
  75. chemistry

    Describe the circumstances in which the following processes could be used to separate the components of a mixture. -sublimation -crystallization -evaporation of a solvent from a solution -dissolving of an impure substance in a solvent

    asked by cara on January 27, 2016
  76. Chemistry

    "Find the pH of the solution obtained when 32 mL of 0.087 M ethylamine is titrated to the equivalence point with 0.15 M HCl? Do I need to do a rice table for this problem? I'm having difficulty starting this problem... Thanks!

    asked by Rachel on May 21, 2007
  77. chemistry

    Groundwater in Pherric, New Mexico, initially contains 1.800 mg/L of iron as Fe3+. What must the pH be raised to in order to precipitate all but 0.3 mg/L of the iron? The temperature of the solution is 25 degree Celsius.

    asked by Jazmin on January 21, 2011
  78. Chemistry

    You dissolve 0.213 g of acid in 25.0 mL of water. To react the acidic solution to the endpoint you add 23.80 mL of 0.1024 M NaOH. Determine the molar mass of the acid.

    asked by Andres on October 28, 2011
  79. Chemistry

    You dissolve 0.213 g of acid in 25.0 mL of water. To react the acidic solution to the endpoint you add 23.80 mL of 0.1024 M NaOH. Determine the molar mass of the acid.

    asked by Andres on October 28, 2011
  80. math

    4x^2+11x-69=0 Find the solution to use a comma to separate the answers as needed. X^2+11x What is the constant term?(Integer or simplified fraction) 1/6 gt y= (rationalize all Denominators)

    asked by vicky on February 16, 2013
  81. Chemistry

    an acid base titration is conducted in which 20 ml of LiOH is added to 10ml of .200M HBr to reach the equivilance point. what is the molarity of the LiOH solution?

    asked by Elf on April 12, 2010
  82. Chemistry

    How many mL of concentrated HCl(aq) (36% HCL by mass, d=1.18g/mL_ are required to produce 12.5 L of a solution with ph = 2.10? First I started with finding out the concentration of [H30+] and for that I got 7.94 x 10^-3 but I don't know how to continue.

    asked by K on June 7, 2011
  83. Anatomy

    Is osmotic pressure the hydrostatic pressure on the side of a semiperable membrane containing the hypertonic solution which opposes the movement of water particles and can therefore stop osmosis? T OR F

    asked by Amanda on September 12, 2007
  84. Chemistry

    I just need someone to show me how these problems are done then i can do them myself The Ka values of H2CO3 are shown below. Ka1 4.6 10-7 Ka2 4.4 10-11 What is the pH of a 0.15 M solution of Na2CO3? that one i tried to write out all the equations witht

    asked by Amy on March 8, 2009
  85. Chemistry

    Please help! Thanks. An ammonia solution is made by diluting 0.105L of the concentrated commercial reagent until the final volume reaches 1.00L. What is the final molar concentration?

    asked by Sydney on July 19, 2009
  86. AP Gov:US

    List three problems of decentralized power that existed under the Articles of Confederation. For each problem you listed, indentify one solution that the Constitution provided to address the problem.

    asked by Dorcas on January 19, 2012
  87. Chemistry

    A 0.140-mole quantity of CoCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Co^2+ ions at equilibrium? Assume the formation constant of Co(NH3)6^2+ is 5.0× 10^31.

    asked by Sarah on May 11, 2012
  88. pre ap chemistry

    you will need to explain in detail how to make 100.0 ml of a 0.500M CUSO4.5H20(s) SOLUTION. BE SPECIFIC about the measurements you would make and the type of equipment you will use . write out steps

    asked by nissa on April 26, 2015
  89. chemistry

    How many milliliters of concentrated nitric acid, HNO3, 70 % (wt/wt) are required to prepare 1 liter of 0.250 M solution? The molar mass and density of HNO3 are 63.0 g/mol and 1.36 g/cm respectively.

    asked by karen on November 4, 2016
  90. Bio Chem

    Carbonate is commonly used to buffer household detergent solutions to a pH of 9.0. How many grams on NaHCO3 and how many grans of NA2CO3 are needed to prepare 0.75L of a 100mM solution? The 2nd pKa of carbonic acid is 10.33.

    asked by Cassandra on September 4, 2014
  91. chemistry - exam practice help!!

    i'm not exactly sure how to do this question :/ i don't even know where to start. "Determine the equilibrium [F-] of the following solution with initial concentrations od [HF]= 1.296 M and [NaF] = 1,045 M (ka for HF is 6.6 * 10 ^ -4) options are a) 1.046

    asked by Anya on December 12, 2012
  92. AP Chem

    1.513g of monoprotic acid (HX) is dissolved in water, and the volume is 250.0 ml after the dissolving. The solution was then titrated 38.12g of .100 M NaOH to reach the end point of the titration. What is the molecular weight of HX?

    asked by Anna on April 23, 2012
  93. Calculus

    Use Euler's method with step size 0.2 to estimate y(1.4), where y(x) is the solution of the initial-value problem below. Give your answer correct to 4 decimal places. y' = x - xy y(1) = 0 h = 0.2 Since I am at y(1) = 0 and not y(0) = 0 would I just do this

    asked by COFFEE on June 22, 2007
  94. To Francesca and James

    I have added comments to your solution of the inclusion/exclusion problem at the end of the original post: http://www.jiskha.com/display.cgi?id=1302620150 Feel free to go back and check it out.

    asked by MathMate on April 13, 2011
  95. Algebra

    I am great at math but for some reason can not wrap my brain around Algebra for the world! Please Help!! Im stumped! Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -3x –

    asked by June on November 17, 2010
  96. algebra

    hola necesito ayuda con mi tarea pero no entiendo como aserlo porque esta en ingles which ordered pair is the solution set of the following system of inequalities? y< 1/2x + 4 y> and equal to -x + 1 f:(-5,3) g:(0,4) h:(3,-5) j:(4,0)

    asked by Anonymous on March 29, 2013
  97. global finance

    Search: whar would jeffs monthly morrtgage payment be if he borrowed $80,000 for 30 years at twelve percent annual rate? pls give me the solution and answer by using formula FV=(1+r) to the power of t -1 over r

    asked by charry grace on March 25, 2011
  98. chem 1A

    Balance the following oxidation-reduction reactions, which occur in acidic solution, using the half-reaction method. (Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.) (a) Cu(s) + NO3‾(aq) →

    asked by Anonymous on November 4, 2012
  99. chemistry

    find the average molar mass of polyethylene when 4.40 g of the polymer is dissolved in benzene to produce 200.0 mL of solution and the osmotic pressure is found to be7.60 torr ant 25 celcious Degree.

    asked by Anonymous on April 2, 2012
  100. Chemistry

    Determine the molarity of a sodium hydroxide solution? if 37.34 mL of it are required to neutralize 1.922 g of citric acid. balanced equation- 3NaOH(aq)+H3C6H5O7-->3H2O(l)+NaC6H5O7(aq… ***Plesae show steps.

    asked by Cynthia on March 7, 2012

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