1. Math

    For the following equations, write a word problem draw a picture, and find the solution to the equation: 5/12 - 1/3= 1/2 - 2/3=

    asked by Anonymous on October 9, 2009
  2. chemistry

    describe how you would prepare 500ml of a solution containing 0.025M sodium acetate and 0.001% w/v starch.

    asked by Anonymous on February 10, 2013
  3. chemistry

    What volume of a 0.553 M calcium hydroxide solution is needed to exactly neutralize 7.34 grams of KHP

    asked by Pam on April 9, 2015
  4. Math

    Use substitution to determine whether the ordered pair (–2, –3) is a solution of the equation x^2 – y = 7 I say no, but am still not sure because the signs are confusing. Am I correct? Thanks!

    asked by Crystal on June 12, 2009
  5. Chemistry

    Hi please help with this. You will mix 5 ml of each 2M HCL and 2M NaOH solutions, calculate the concentration of NaCl formed in the new solution?

    asked by John on October 17, 2010
  6. Chemistry

    20cm3 of 0.1m sulphuric acid was required to react with 50.0cm3 of a solution of sodium hydroxide

    asked by Aliyah on October 26, 2016
  7. Chemistry

    Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?

    asked by Kervin on November 18, 2012
  8. Chemistry

    If 2.50 mol. of sodium chloride was required to make up a solution of a particular concentration, what mass would need to be measured out?

    asked by Deanna on March 20, 2015
  9. Algebra 1

    Choose the correct solution in roster form. N is the set of natural numbers that are factors of 12. {1, 2, 3, 4, 6} {1, 2, 3, 4, 6, 12}** {1, 2, 3, 4, 5, 6, 8, 12} {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}

    asked by Anonymous on October 26, 2016
  10. Chemistry

    What is the total mass of KNO3 that must be dissolved in 50 g of water at 60 degree C to make a saturated solution?

    asked by Michael on March 22, 2016
  11. chemistry

    the molarity of a solution composed of 25.4g KHCO3 diluted with water to a total volume of 200 mL

    asked by Colin on October 18, 2011
  12. Calculus

    (1 pt) Find the unique solution to the differential equation y"?5y'+6y=?312sin(2t) satisfying the initial conditions y(0)=?31 and y'(0)=?18

    asked by Hannah on December 3, 2010
  13. Chemistry

    Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?

    asked by Kevin on November 18, 2012
  14. Calculus

    Find the unique solution to the differential equation y"?1y'?6y=?24(t^2)+10t+41 satisfying the initial conditions y(0)=?6 and y'(0)=?26

    asked by Hannah on December 3, 2010
  15. Analytical Chemistry

    Determine the pH of a solution that is generated when 2.623 g Na3PO4 is added to a 100mL of 0.0800 M H3PO4.

    asked by Kevin on July 24, 2013
  16. Chemistry

    If a 45.3-g sample of potassium nitrate is dissolved in enough water to make 225 mL of solution, what will be the molarity?

    asked by Kevin on February 2, 2012
  17. chemistry

    If 36.3 ml of 0.152M NaOH is required to neutralize 25.00 ml of an HC2H3O2 solution ,what is the molarity of the acetic acid?

    asked by HJ on September 11, 2012
  18. algebra

    (d)are the strategies that you listed in step(c)equally viable? might any of them yield a solution to the problem more readily than others? if so, why?

    asked by Darrin on October 2, 2010
  19. chemistry

    What is the molality of a solution made by adding 0.130 g of zinc sulfite to 151 ml water?

    asked by Dorothy on March 1, 2014
  20. chemistry

    Acids and Bases: What would be the pH of a solution made by adding 16.9 grams of hydrochloric acid to 2.50 L of water?

    asked by Marinas on November 22, 2013
  21. chemistry

    How much BaCl2 would be needed to make 250 mL of a solution having same concentration of Cl^- as the one containing 3.78g of NaCl per 100 mL?

    asked by jaimi on April 16, 2015
  22. Chemistry

    Determine the concentration for the following solutions 2.0g KOH is dissolved in water to make 200.0 ml of solution

    asked by Sara on February 23, 2017
  23. Chemistry

    Given that Kw for water is 2.4× 10–14 at 37 °C, compute the pH of a neutral aqueous solution at 37 °C, which is the normal human body temperature.

    asked by John on October 20, 2011
  24. chemistry

    Would u expect the boiling point of a solution to change if u added a non-volatile solute such as KCl?

    asked by 123 on November 7, 2010
  25. Chemistry

    Identify the solvent and the solute in vinegar, a dilute aqueous solution of acetic acid.

    asked by Danny on April 13, 2010
  26. Chemistry

    Balance the following redox reaction in acidic solution: H3PO4 + HNO2--> N2O4 + H3PO3

    asked by Kynlee on May 10, 2011
  27. Chemistry

    What is the PH of a 0.747M sodium cyanide solution (NaCN) knowing that the Ka of Hydrocyanic acid is 4.9x10-10?

    asked by Ab on March 23, 2019
  28. Chemistry

    Hydrogen cyanide is a weak acid with Ka = 4.9 x 10-10. Calculate the pH of a solution (to 2 decimal places) containing 2.28 g of Sr(CN)2 per 158 mL.

    asked by Andrew on January 7, 2008
  29. chemistry

    You need to make a solution containing 150 g of potassium chloride in 300 g of water. What temperature is required?

    asked by Anonymous on April 19, 2012
  30. chemistry

    Calculate the pH of a 3.00×10-4 M solution of the strong acid HClO4. Round your answer to 3 significant digits.

    asked by HELP ASAP PLEASE on October 10, 2013
  31. Chemistry

    If 0.370 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?

    asked by Caitlin on December 3, 2017
  32. english

    I really need someone to write me a short formal letter of complaint that presents a problem and suggests a solution. Please help!!

    asked by ade on June 16, 2011
  33. Chemistry

    250ml solutions is prepared on dissolving 20g NaOH. Calculate the molarity of solution

    asked by Diwaker on July 25, 2016
  34. Chemistry

    What is the hydronium ion concentration in a solution 0.150M in HNO2 and 0.300M in NaNO2? Ka = 7.24E-4

    asked by Alexis on April 14, 2013
  35. chemistry

    o make 100mL of a solution that is .25M in chloride ion, how many grams of MgCl2 would you need to dissolve

    asked by samantha on September 16, 2007
  36. Chemistry

    How could tell a copper (II)sulfate solution from lead (II)nitrate or sodium sulfite if the solutions were not labeled ?

    asked by Jackson on February 13, 2011
  37. Chemistry

    How much water must be added to 6 mL of a 0.05M stock solution to diltue it to 0.02M ? The answerI got is 15 mL. Is this correct? Thanks

    asked by Shadow on April 18, 2013
  38. Chemistry

    Why would copper (II) sulfate solution react with iron to produce 3 CuSO4(aq) + 2 Fe (s) = 3 Cu (s) + Fe2(SO4)3 (aq)

    asked by Victoria on May 22, 2014
  39. chemistry

    Which solution would increase the osmotic pressure of water the most? a) KBr b) NaCl c) MgCl2 d) glucose

    asked by Donna on May 19, 2008
  40. chemistry

    For a solution that is 0.280M HC3H5O2 (propionic acid, Ka= 1.3*10^-5) and 0.0894M HI , calculate the following: [H3O+] [OH-] [C3H5O2-] [I-]

    asked by Saunders on April 14, 2011
  41. College Chem

    Calculate the number of grams required to make 250 mL of a 0.020 M KIO3 solution.

    asked by Kelli on October 3, 2010
  42. Chemistry

    What volume of 5% vinegar solution is needed to neutralize 1.0g of baking soda if density is 1.01g/ml

    asked by Marianna hutchinson on December 6, 2013
  43. AP chemistry

    1). In a titration 20 mL of 0.100 M of HCl is added to 50.0 mL of 0.150 M of ammonia. A). What is the pH of NH3? B). What is the pH of the resulting solution? HELP :(

    asked by Amanda on March 21, 2013
  44. science

    which solution is made entirely of gases? cough syrup,soda,helium,or clean air.

    asked by tricia on September 29, 2011
  45. Chem 2

    Using the reaction HB H+ + B- and the Ka for that expression, calculate the Ka given the initial concentration of weak acid to be 0.150 M and the pH of the solution to be 2.79.

    asked by Myssey on July 27, 2012
  46. chemistry

    phenol is insoluble in NNAHCO3 solution while acetic acid is soluble.give reason.

    asked by nat on July 14, 2011
  47. Chemistry

    Which of the following will be more soluble in an acidic solution than in pure water? Be(OH)2 Ag2SO4 RbClO4 CuCN Cul

    asked by Anon on March 14, 2013
  48. Chemistry

    What ratio of molar concentrations of sodium acetate to acetic acid can buffer a solution at a pH of 4.89?

    asked by Samantha on March 27, 2017
  49. analytical chemistry

    What is the pH of a solution formed by mixing 14.35 mL of 0.200 F HCl with 0.322 g of Na3PO4, followed by dilution to 500.00 mL?

    asked by Jonny on December 4, 2007
  50. Science

    What kind of a solution will you create if you add 17g of table salt to 50g of wAter at o'c?

    asked by John mark Lomboy on June 25, 2016
  51. chem

    calculate the amount of water that must be added to 6.5 grams of urea to produce a 22-2% by mass solution?

    asked by anthoony on January 28, 2012
  52. Chemistry

    Calculate the pH of a solution created by adding 5.00g of LiF to 150.0mL of 1.25M HF. Ka = 7.2 x 10-4

    asked by A on March 7, 2013
  53. Chemistry

    200 g of CH3COOH are dissolved in enough water to make 1.5 L. What is the molarity of the acetic acid solution?

    asked by Andrea on May 13, 2012
  54. chemistry

    if I have 1.60g of urea, how much water, in grams, should be added in the preparation of a 23.1 percent by mass solution?

    asked by Anonymous on March 13, 2014
  55. Chemistry

    What will the pH of a solution be when 0.5447 L of NaOH (pH = 14.436) is added to 0.357 L of 2.01 M ascorbic acid (H2C6H6O6)? Not sure how to do this.

    asked by Anonymous on June 29, 2016
  56. Maths, physics, chemistry,

    The weight of H2C2O4.2H2O required to prepare 500 ml of 0.2N solution is a)126g b)12.6g c)63g d)6.3g

    asked by Deepak on April 29, 2017
  57. Chemistry

    How many grams of sodium sulphate (mol. wt. 142) are required to make 1.2 liters of 0.5N solution

    asked by Frank on September 19, 2013
  58. Science

    Will adding30g of SO2 to 100g of water at 0 degrees C create a staurated solution? Explain

    asked by Anonymous on February 9, 2011
  59. Chemistry

    what is the accetic acid solution when 30ml .15M NaOH have been added to 50ml .1M HOAc?

    asked by Gabby Gonzalez on May 24, 2011
  60. College Chemistry

    How many grams of Al would be deposited from an aqueous solution of Al3+ with a current of 1.430A after 5hrs of deposition.

    asked by Jude on May 3, 2011
  61. Chemistry

    In water at 25°C, which of the following is the most basic solution? a) pH = 3 b) pH = 0 c) [OH-] = 10-13 M d) [H3O+] = 10-13 M My assumption is is OH- 10^-13, but I am not confident, is this some sort of trick question?

    asked by Daniel on January 19, 2015
  62. Chemistry

    What are the concentrations of acetic acid (pKa = 4.76) and acetate in a buffer solution of 0.15 M at pH 4.5? Please help me do this problem. I have no idea how to do it.

    asked by Emma on April 27, 2016
  63. chemistry help

    what mass of ammonium chloride can be added to 100g of water at 20 degrees C before the solution becomes saturated

    asked by kate on May 28, 2009
  64. science

    the volume of nh3 at stp needed to pass into 30 ml of in h2so4 solution to bring down its strength to m/10

    asked by aditya on July 4, 2011
  65. Chemistry

    What is the osmotic pressure of a solution made from dissolving 60.0g of glucose, C6H12O6, in 450 mL of water at 10.0∘C?

    asked by Ashleigh on September 2, 2014
  66. chemistry

    explain how you would make 200. mL of a 0.150 M solution of calcium chloride, if provided with the solid

    asked by Anonymous on September 26, 2013
  67. Math

    Can someone check this for me please... 4x + 8 >= (that is greater and equal to) 4 and 2x - 13 >= -5 the solution: {x|x>= 4} on the graph the highlighted line goes to the left...is this correct?

    asked by Carmen on November 2, 2008
  68. Chemistry

    To make the following saline solution(375ml 0.5%w/v sodium chloride) what would you weight out? what volume of water would you use?

    asked by Danny on October 22, 2010
  69. chemistry

    if you have 100 ml each of 1.0 m solutions of NaCl,KCl, and CaCl2 which solution would have the largest mass? explain..

    asked by lilly on April 28, 2011
  70. Calculus

    write and row reduce the augmented matrix to find the general solution. x + y - z = 7 2x - y - 5z = 2 -5x + 4y + 14z = 1 3x - y - 7z = 5

    asked by Amy on January 27, 2014
  71. chemistry

    what mass of potassium hydroxide is required to produce 2.00L of a solution mthat has a pOH of 4.5?

    asked by judi on May 8, 2010
  72. chemistry

    Explain in a written statement how you would make 200.0 mL of a [Cl-] = 0.172 M solution starting with CaCl2

    asked by gordon on December 15, 2010
  73. chemistry

    What is the final volume if 125 mL of a stock solution of nitric acid at 10.30 M is diluted to 0.500 M?

    asked by Anonymous on April 14, 2015
  74. Chemistry

    Determine the fluoride ion concentration for a saturated solution of magnesium flouride. (Ksp = 7.4E-11)

    asked by Kelsey on October 30, 2017
  75. CHEM

    How many grams of magnesium chloride are needed to prepare 100ml of a 0.325 M MgCl2 solution?

    asked by Lisa on February 7, 2013
  76. Algebra 1

    I am trying to find the solution for y-9>-17 and I don't know where to start. i have been out of school for nearly 30 years and none of the info makes any sense. please help..thanks

    asked by Amanda R on August 28, 2010
  77. Chemistry

    what is the accetic acid solution when 30ml .15M NaOH have been added to 50ml .1M HOAc?

    asked by Gabby Gonzalez on May 24, 2011
  78. chemistry

    calculate the molality of a solution that has 1.02kg sucrose C12H22O11 dissolved in 554g water?

    asked by gabriela on April 10, 2017
  79. chemistry

    If 33.4 mL of the base are required to neutralize 11.1 mL of hydrobromic acid, what is the molarity of the potassium hydroxide solution?

    asked by Anonymous on May 2, 2012
  80. Chemistry Please help

    A bottle of 12.0 M hydrochloric acid has only 35.7 mL left in it. What will the HCl concentration be if the solution is diluted to 250.0 mL?

    asked by Alexandra on September 29, 2013
  81. science

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

    asked by Jon on October 7, 2010
  82. Chemistry

    What is the OH^- concentraton of a solution that is 0.10M in Na2C2O4? I have a couple of these concentration questions asking different things but I don't know how to do them

    asked by LT on April 14, 2008
  83. Chemistry

    What volume of 0.170 M K3PO4(aq) must be added to 50.3 mL of 0.103 M K2HPO4(aq) to prepare a buffer solution with a pH of 12.09?

    asked by Jamie on October 21, 2014
  84. chemistry

    what are the factors that determine the mass of solute that will dissolve in a giben amount of solvent or solution?

    asked by bonnie on June 6, 2011
  85. Math

    Can someone please help with this? I am helping my niece with this problem:7x>_49. Here is what I have: x>_7. The solution is:{x|x>_7}. The graph is: a solid dot on the 7 going to the right. Is this correct?

    asked by B.B. on April 16, 2010
  86. Chemistry

    Name the product obtained on passing cabon(2) oxide into saturated potassium trioxocarbonate(4) solution.

    asked by Yaseerah on May 20, 2015
  87. solubility graph

    if 20 g of sodium chloride are dissolved in 100 cm3 of water at 20gC, is the solution saturated?

    asked by tony on November 10, 2008
  88. Math

    Determine which ordered pair is not a solution of y= -5x - 4. (10,-52) (7,-39) (-7,3) (8,-44) I think it is (10,-52) Pls help I always mix up graphing coordinate planes!

    asked by 7 dream kid on November 19, 2018
  89. science

    the volume of nh3 at stp needed to pass into 30 ml of 1N h2so4 solution to bring down its strength to m/10

    asked by aditya on July 4, 2011
  90. Science

    calculate the mass of NaOH required to make 500ml of 0.5Molar aqueous solution

    asked by Shanton on January 2, 2018
  91. chemistry

    what mass of potassium chloride is required to prepare 5.00L of a 2.00M solution of KCL

    asked by TROUBLED on October 24, 2011
  92. chemistry

    If 50ml of 0.1M NaOH are mixed with 35ml of 0.1M HCL will the solution be acid, base or neutral? why?

    asked by Anonymous on October 9, 2010
  93. chemistry

    what are the equilibrium concentrations of Pb2+ and F- in a saturated solution of lead (II)flouride if the Ksp for PbF2 is 3.2*10^-8?

    asked by Victoria on December 7, 2012
  94. CHEM

    How many grams of sodium chloride are required to prepare 1.00 liter of a 1.00M NaCl solution?

    asked by Lisa on February 7, 2013
  95. Chemistry

    How much ethylalcohol must be added to 1litre of water so that the solution will freeze at 14 farenite, kf of wa ter is 1.86 c/mol

    asked by Ria on February 22, 2017
  96. Chemistry

    which salt solution would have the highest ph and why KI,KBr,KF,KCL or they all have the same ph. Im leaning towards KF since im pretty sure the other salts are neutral?

    asked by Sean on February 19, 2017
  97. science

    the volume of nh3 at stp needed to pass into 30 ml of in h2so4 solution to bring down its strength to m/10

    asked by aditya on July 4, 2011
  98. Chem II

    Calculate the pH and percent ionization for the solution made up of 0.035 M NH3 and 0.015 M NH4Br.

    asked by Ken on April 14, 2008
  99. chem

    If 20 g KCL is dissolved in 100g of water at 20 degrees C, is the solution unsaturated, saturated, or supersaturated?

    asked by tom on May 28, 2009
  100. chemistry

    Which of the following is a weak electrolyte in aqueous solution? a. H2SO3 b. HNO3 c. HBr d. HClO4 e. NaOH

    asked by zacky on March 23, 2010

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