1. chemistry

    What is the percent by mass concentration of KCl in a solution prepared by adding 80.0 g KCl to 200.0 g of water?

    asked by Pressila on September 27, 2010
  2. Chemistry 12

    In s 0.30 mol/L HNO3(aq) solution. a) what is the concentration of nitric acid molecules. b)what is the hydroxide ion concentration?

    asked by JM on April 1, 2011
  3. Chemistry 30

    How do I complete an ICE table for a solution of nitrous acid, HNO2, one of the acids associated with acid deposition?

    asked by Iris on December 31, 2012
  4. Chemistry

    Why is it important to keep the NaOH solution (being used during titration) stoppered at all times when it is not in use? And why is it all right to use a wet flask for a titration experiment?

    asked by Cassie on March 26, 2011
  5. Chem

    What is the pH of a 0.115 mol/L solution of sodium acetate, CH3COONa, at 25oC? (pKa=4.74 at 25oC for CH3COOH.)

    asked by M on April 3, 2016
  6. chemistry

    What mass of MgSO4 · 7H2O is required to prepare 300 mL of a 0.61 M MgSO4 solution? Answer in units of g

    asked by cheri on September 16, 2012
  7. chem

    If a solution initially contains (9.5x10^-2) M of HC2H3O2, (and no H3O+ or C2H3O2– ),what is the equilibrium concentration of H3O+ (aq) in the mixture?

    asked by mike on May 1, 2016
  8. Chemistry

    Why wouldn't HCl be a good acid to use to determine the solubility of a silver precipitate in acid solution?

    asked by Nicole on April 12, 2011
  9. Calculus

    Find a solution to the equation if possible. Give the answer in exact form and in decimal form. 8=4sin(5x)

    asked by Mike on January 23, 2013
  10. Chemistry

    How many moles of benzoic acid, a monoprotic acid with Ka=6.4×10^-5, must dissolve in 250mL of H2O to produce a solution with pH=2.04

    asked by Khadijah on April 3, 2017
  11. Calculus

    Find a solution to the equation if possible. Give the answer in exact form and in decimal form. 8=4sin(5x)

    asked by Mike on January 23, 2013
  12. chemistry

    What would be the best technique to separate a soluble solid from a solution, like separating salt from a mixture of salt water?

    asked by Ashley on April 17, 2011
  13. Chemistry

    For the reaction: Pb(NO3)2(aq) + 2KCl(aq)->PbCl2(s) + 2KNO3(aq) How many grams of PbCl2 will be formed from 63.0 mL of a 1.60 M KCl solution?

    asked by Terri on June 22, 2016
  14. Chemistry Urgent please help! Test tomorrow

    if you have a mixture of sodium chloride and sodium bromide, could you use its conductance to determine the concentration of each solution? explain

    asked by Anonymous on January 9, 2013
  15. science

    what type of solution is formed when steam from boiling water evaporates into the air?Explain.please explain

    asked by Anonymous on October 15, 2009
  16. Calculus

    Find a solution to the equation if possible. Give the answer in exact form and in decimal form. 8=4sin(5x)

    asked by Mike on January 24, 2013
  17. Math

    The equation x^2+12x=73 has two solutions. The positive solution has the form (sqrta)-(b) for positive natural numbers a and b. What is a+b? Thanks

    asked by Linda on April 7, 2016
  18. chemistry

    a supersatured sugar solution (can/ cannot) be used in a calibration graph. What kind of graph, but probably not since you won't know the degree of supersaturation.

    asked by hawkstar on October 4, 2006
  19. Chemistry

    If 45.8 grams of MgO are dissolved in 205 grams of water, what is the concentration of the solution in percent by mass?

    asked by ilyrae on March 21, 2011
  20. Analytical Chemistry

    how much volume of h2so4 is needed to produce a 0.953 Normality) of h2so4 if the 1 liter solution is 1.14 g/mL in density?

    asked by Sham on August 13, 2016
  21. chemistry

    What mass of NaCl should be found in 0.51 L of a saturated solution of sodium chloride if the Ksp of NaCl is assumed to be 1.5 x 10-5?

    asked by Johnathan on May 25, 2008
  22. math

    integral of ((1+sin(2x))^0.5)/(sin(x)^2) I tried all kind of substitution, simplification but unable to solve it.Need a hint only no solution please.

    asked by Sam on April 15, 2017
  23. Chemistry

    How many milliliters of 1.40 M KOH solution are needed to provide 0.120 mol of KOH? please explain how to solve

    asked by Veronica on October 7, 2010
  24. Finance

    what is the solution to bunyan lumber lumber 45-year harvest based on $300,000 contribution

    asked by sharon on December 19, 2011
  25. chemistry

    Explain in words how you would prepare 250 ml of a 3.000 M solution of Ba(OH)2 starting from a two liter bottle of 12.000 M Ba(OH)2

    asked by lalo on October 11, 2010
  26. chemistry

    Describe how you would make 500.0mL of a 0.200M NaOH solution from a 15.0 stock NaOH conentration

    asked by Monique on November 6, 2011
  27. chemistry

    A solution of 25.0mL of 0.10mol/L hydroiodic acid is titrated with 0.10mol/L ammonia.Determine the pH at equivalence.

    asked by rana on January 29, 2017
  28. Chem

    The molecular weight of CaCl2 is 110.98 g/mol. In order to make up 500.0 ml of a 0.500 M solution, you need how many g?

    asked by Danny on July 26, 2012
  29. Chemistyr

    Eighty grams of sodium nitrate dissolved in 50 grams of water will make what type of solution?

    asked by Kayla Johnson on March 28, 2012
  30. chem

    What is the pH of a solution prepared by diluting 25.00mL of 0.020M barium hydroxide to a volume of 100.00mL?

    asked by Ginger on April 26, 2008
  31. health science chemistry

    How many ml of water should be added to 20.0 ml of a stock of 12.0 M HCl solution to make 1.50 M HCl ?assume that the volumes are additive.

    asked by konja on May 4, 2016
  32. science

    what is the concentration of a sugar solution that contains 8 g sugar dissolved in 500 ml of water? explain in ration form

    asked by cheryl on November 20, 2011
  33. Chemistry

    2 Ag+(aq) + Fe(s) --> 2 Ag(s) + Fe2+(aq) Which electrode is the anode, and which is the cathode. and In which directions do the cations and anions migrate through the solution? cations thanks

    asked by Rachel on May 10, 2011
  34. chemistry

    What is the concentration (in molarity) of acetone in a solution prepared by mixing 11 mL of 4.0 M acetone, 16 mL of 0.02 M Br2, 11 mL of 1.0 M HCl, and 16 mL of water?

    asked by elizabeth on September 16, 2010
  35. Chemistry

    What are the concentrations of HSO4- and SO42- for a 0.0050 M sulfuric acid solution? We are trying to find x but not sure how to find it on the calculator, please help!!!

    asked by Haley&Emily on February 21, 2014
  36. Chemistry

    If you weigh out 2.083 g Fe(NO3)3·9H2O, what is the final concentration of the dilute Fe(NO3)3 solution that you make?

    asked by Sarah on June 27, 2013
  37. Chemistry

    Suppose that you used 0.75g of iron. What is the minimum volume of 1.5 M_ CuSO4 solution required Using eqn. (3-1)? and eqn. (3-2)?

    asked by Liza on September 12, 2015
  38. chemistry

    give the pH of a solution containing .972 g HBr in 628 mL of a soluion. I did .972/80.9=.012 mol. what do i do next...i'm stuck!

    asked by Miley on May 15, 2008
  39. chem

    what test will you perform to determine when you have added sufficient NaOH solution to the reaction mixture in reaction 2

    asked by erlicia on September 29, 2010
  40. Algebra

    i tried to figure out if 5/3 would be a solution for 6x^2-11x-35=0. i got -0.21 on the left side. is this close enough to 0 that it would count because my book said it was indeed equal to the right side.

    asked by Aliviah on September 27, 2009
  41. chemistry

    A 116.9 g sample of nitric acid solution that is 70.0% HNO3 (by mass) contains how many moles of HNO3? how did you get the answer

    asked by DIANA on December 5, 2011
  42. chemistry

    How many grams of chlorine gas are needed to make 5.10 × 106 g of a solution that is 1.50 ppm chlorine by mass?

    asked by Anonymous on September 24, 2014
  43. Chemistry

    A current of 3.94 A is pass through a Pb(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 5.40 g of lead?

    asked by Brianna on July 24, 2013
  44. Math

    I need help on how to solve this type of problem please. 29.)Solve the inequality and express the solution in terms of intervals whenever possible. 1/(x-2) ≥ 3/(x+1) THE ANSWER IS: ( -∞,-1 ) U ( 2,(7/2) ]

    asked by Alex on August 12, 2012
  45. chemistry

    what volume of 0.150M Li2Sr solution is required to completely react with 130ml of 0.150M Co(NO3)2

    asked by Jake on October 17, 2014
  46. Chemistry

    A current of 5.61 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 9.00 g of nickel?

    asked by Anon on March 29, 2013
  47. chemistry

    What mass of MgSO4 · 7H2O is required to prepare 300 mL of a 0.61 M MgSO4 solution? Answer in units of g

    asked by cheri on September 13, 2012
  48. AP Chemistry

    A solution is prepared by titrating a 100.0 mL sample of 0.10 M HF (Ka = 7.2 × 10-4) with 0.10 M NaOH. A)What is the pH after 20.0 mL of the 0.10 M NaOH is added? Show all calculations.

    asked by Anonymous on March 25, 2016
  49. Calculus

    If g(X) = 2+ln(x-5), find the inverse function, (g^(-1))(x) Solution: y = 2+ ln(x-5) e^y = 2 + x - 5 x = e^y + 3 y = e^x + 3 g^(-1) = y = e^x + 3 Is that right? I'm following an example - but don't really get it - how do I determine the domain and range -

    asked by Linda on September 3, 2016
  50. Science!

    Which of the following is not a process of a stream load? A. Suspension B. Bed Load C. Materials in solution D. Divide Im thinking D but also C?

    asked by Morgan on September 8, 2014
  51. science

    ind the molality of the solution obtained when 36.5 gram HNO3 is dissoloved in 750 gram water

    asked by tanay patel on September 23, 2014
  52. Chemistry

    Suppose you mix 20.1 g of water at 66.2°C with 45.1 g of water at 35.7°C in an insulated cup. What is the maximum temperature of the solution after mixing?

    asked by Lance on June 7, 2011
  53. math

    what is the concentration of a sugar solution that contains 8g sugar dissolved in 500 ml water? answer in the form of a ratio

    asked by cheryl on November 20, 2011
  54. chemistry

    indicate the concentration of each ion presentin the solution formed by mixing 20mL of .1M HCL and 10mL of .22 M HCL

    asked by fdg on December 6, 2011
  55. Chemistry

    How many grams of Calcium Nitride can be produced using the calcium contained in 100 ml of a 4 Molar beryllium solution?

    asked by momo on April 15, 2012
  56. business solutions

    formulate a solution that takes into account audience characteristics... requirements, and expectations? the scenerio I have tell 25 classmate that our trip has been canceled for mexico because the bus company filed bankruptcy and they will not be getting

    asked by todd on July 20, 2006
  57. Physics

    For a L-C-R circuit Vin = v0*expjwt. Vout is taken across R a) Calculate the impedance of the circuit measured from the input side. Express the impedance in polar form. b) Calculate the gain=Vout/Vin and express the ratio in polar form. c) Sketch the

    asked by Sandhya on March 29, 2008
  58. Physics

    At a chemical plant where you are an engineer, a tank contains an unknown liquid. You must determine the liquids specific heat capacity. You put 0.500 kg of the liquid into an insulated metal cup of mass 0.200 kg. Initially the liquid and cup are at 20

    asked by Marthin on January 17, 2018
  59. Chemistry

    how many cubic cm hydrogen chloride gas at s.t.p would be required to precipitate all the silver ions from 32 cm of 0.08 M silver nitric solution?

    asked by Doris on September 23, 2016
  60. chem

    100 mL of LiNO3, 0.241 M is mixed with 240 mL of 0.618 M Ca(NO3)2. What is the final concentration of NO3- in the solution?

    asked by duff on January 24, 2008
  61. Chemistry

    What is the mechanism of an aldehyde reacting with fehlings solution and tollens reagent? I know it is oxidised to a carboxylic acid, but i want to know the mechanism. Thank you.

    asked by Alexandre A A on October 12, 2014
  62. Mathematics

    1. Determine which ordered pair is a solution of y = x^2-2 (5, 21), (–5, 24), (–1, –1), •• (–2, 6) 2. Without graphing, tell whether the line containing (6, –3) and (0, –8) is horizontal, vertical, or neither I think it's horizontal Correct

    asked by Queen/Halle on April 10, 2016
  63. chemistry

    Explain how you would prepare the following dilute solutions from the more concentrated ones: a. 200ml of .500M HCL from a 6.00M HCL solution.

    asked by cameron on April 4, 2011
  64. Chemistry

    A solution has a hydroxide-ion concentration of 7.48X10-5 M. What is it's hydronium-ion centration? I have no idea where to begin on this question...

    asked by Robby on February 18, 2013
  65. Chemistry

    a 0.451 L solution of 1.71 ascorbic acid (ka1=7.9E-5, ka2=1.6E-12) is titrated with 1.35 M NaOH. What is pH when 0.9540 L of NaOH is added?

    asked by Chris on December 11, 2012
  66. science

    Why is it difficult to distinguish between some pure substances and solutions? What methods can overcome this to define if either it is a pure substance or solution?

    asked by Sunny on April 14, 2013
  67. chemistry

    What would be the pH of a 0.563 M solution of ammonia (NH3) at room temperature? The Kb of ammonia is 1.78 × 10−5. 1. 2.5 2. 7 3. 9 4. 4.5 5. 11.5 ( I did this problem but apparently 4.5 isnt the answer)

    asked by vivian on May 13, 2011
  68. Math

    1. Determine which ordered pair is a solution of y = x^2-2 (5, 21), (–5, 24), (–1, –1), •• (–2, 6) 2. Without graphing, tell whether the line containing (6, –3) and (0, –8) is horizontal, vertical, or neither I think it's horizontal Correct

    asked by Queen on April 10, 2016
  69. Chemistry

    What mass of lithium phosphate is needed to prepare 500.0 mL of a solution having a lithium ion concentration of 0.1385 M?

    asked by Chris on April 14, 2014
  70. Algebra

    You work in a lab. One day you need 568 oz of a chemical solution consisting of three parts alcohol and five parts acid. How much of each should be used?

    asked by Marinette on February 16, 2016
  71. bio/chem

    how do i make percent solutions w/v starting with pure NaCl and distill water. eg 100ml of a 1% NaCl solution

    asked by Amber M on May 13, 2010
  72. math

    Solve the equation. (Enter solutions from smallest to largest. If there is no solution, enter NONE in the answer boxes.) 5x2 = 9x + 2

    asked by Anonymous on January 22, 2012
  73. chemistry

    determine the concentration of NH3(aq) that is required to dissolve 775 mg of AgCl(s) in 100.0 mL of solution. The Ksp of AgCl is 1.77× 10–10.] please help!!!!!!!

    asked by maggie on April 3, 2015
  74. Chemistry

    1. Show quantitatively how you would prepare a solution of 3.10 x 10^2 g of 0.125 molar (m) ethylene alcohol from ethylene glycol and water.

    asked by eddy on August 3, 2011
  75. Science

    In an experiment, Tom dissolved 2.125 g of NaOH to make 200.0 mL of aqeous solution. What is the NaOH molarity?

    asked by Anonymous on October 3, 2011
  76. Chemistry

    How many grams of barium nitrate is needed to form a solution with 5.00 mass% Ba (NO3)2 in 400 grams of water.

    asked by Vicki on May 14, 2013
  77. Math-PLEASE HELP!!

    I have two questions That I need help with please!! 1. solve the following exponential equation. what is the exact solution? what is the decimal approximation when rounded three decimal places? 2.

    asked by Sandi on January 9, 2013
  78. Chemistry

    Given an unknown mixture consisting of two or more substances, explain how we could determine whether that mixture is a true solution, a colloid, or a suspension

    asked by Anonymous on March 11, 2010
  79. Math

    5. Find the solution to the system of equations by using either graphing or substitution. y = 6 – x and y = x – 2 (2, 4) (–4, 2) (4, 2) no solutions 6. y = 2x – 1 and y = x + 3 (1 point)(4, 7) (7, 4) (–7, –4) infinite solutions 7. y = 4x and y

    asked by Mr.Brain on May 2, 2013
  80. Environmental

    I have to write a paper on an environmental problem and expand on a (or two) solution to the problem... any ideas? Anything specific would be great since I'm at a stand still...

    asked by Jessy-Leigh on December 3, 2007
  81. chemistry

    A solid that has a high melting point and conducts electricity in solution is a(n) ______________ solid. Im not sure what the answer is it molecular?

    asked by Cecilia on September 8, 2010
  82. math

    an equilateral triangle of side 10cm is inscribed in a circle. find the radius of the circle? show the solution

    asked by shafa on March 7, 2019
  83. chemistry

    according to the data in the merck index,if 1,0g of aspirin is dissolved in 100ml of water at 37,how much aspirin will precipitate out of solution when it is cooled to 25.

    asked by peter on March 18, 2017
  84. algebra URGENT HELP

    analyze the graph of the following function solve R(x)=x(x-16)^2 /(x+11) solve the following inequality write solution in interval notation x+14/x-8 less than or equal to 1

    asked by zachary on March 11, 2013
  85. Chemistry

    If .0162 moles of sodium sulfide is dissolved in 100.0 mL of water, what is the concentration of sodium ions [Na⁺] in solution?

    asked by div on May 2, 2016
  86. chemistry

    Find the mass of barium metal (in grams) that must react with O2 to produce enough barium oxide to prepare 1.1 L of a 0.10 M solution of OH^ -.

    asked by Jessica on February 19, 2011
  87. chemistry

    A solution is prepared by dissolving 17.1grams of sucrose, c12h22o11, in 275grams of h20. a)what is the molar mass of sucrose? How would i do that??

    asked by Miley on April 5, 2008
  88. osu

    a 50.0 ml sample of a 15% (m/v) solution of H2SO4 is added to water to give a final volume of 250.0 ml. What would the final concentration be?

    asked by Kat on November 23, 2010
  89. Chemistry

    What is the Cl concentration just as Ag2CrO4 begins to precipitate when 1.0 M AgNO3 is slowly added to a solution containing 0.015 M Cl and 0.015 M CrO4^2?

    asked by Jake on February 20, 2011
  90. chem class

    A 25.00-mL sample of 0.723 M HClO4 is titrated with a 0.273 M KOH solution. The H3O+ concentration after the addition of 10.0 mL of KOH is ???? M.

    asked by richard on November 23, 2010
  91. chemistry

    What would be the pH of a 0.563 M solution of ammonia (NH3) at room temperature? The Kb of ammonia is 1.78 × 10−5. 1. 2.5 2. 7 3. 9 4. 4.5 5. 11.5 ( I did this problem but apparently 4.5 isnt the answer)

    asked by vivian on May 13, 2011
  92. Chemistry

    If the solubility constant for Ag2CO3 is equal to 8.1x10^-12 how many grams of Ag2CO3 will dissolve in a .0001 M solution of Na2CO3?

    asked by Jack on April 17, 2014
  93. Chem

    I did an experiment for creating an ester. So basically I added an acid to an alcohol. We were to also add H2SO4 solution. Why did we add that?

    asked by Lena on March 25, 2009
  94. chem

    How many grams of CaCl2 (molar mass = 111.0 g/mol) are needed to prepare 4.44 L of 0.500 M CaCl2 solution?

    asked by jann on May 15, 2011
  95. Chemistry

    In a 1.0× 10–4 M solution of HClO(aq), identify the relative molar amounts of these species. (most to least) H2O HClO H3O OH- OCl-

    asked by Paula on March 9, 2013
  96. Science

    When water is mixed with another substance and the mixture will not scatter light, the mixture is a:? 1) suspension  2) compound  3) solution  4) substrate 

    asked by Jen on February 25, 2018
  97. Chemistry

    Find the mass of urea (CH4N2O) needed to prepare 50.9 g of a solution in water in which the mole fraction of urea is 7.69×10−2.

    asked by Nicole on February 24, 2016
  98. physical chemistry

    How many grams of NaC2H3O2 (M = 82.034 g mol-1) should be dissolved in 400.0 g of water to prepare a solution which is 11.28 % NaC2H3O2 by mass?

    asked by shafika on January 30, 2010
  99. chemistry

    How many grams of copper will be required to replace silver from 200 mL of 3.00M solution of silver nitrate AgNO3?

    asked by randy ramos on March 30, 2011
  100. Math

    Got quite a silly question, but wondering if anyone knows the solution. Find the sum of the two missing numbers in the sequence 4, 3, 3, 2, 3, 3, 7, 7, 2, _,_ a)10 b)8 c)11 d)7 e)6 Cant seem to find the pattern here, can anyone see it?

    asked by Alex on November 27, 2018

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