1. Chemistry 12

    Calculate the pH of the solution that results when 27.38mL of 0.15M H2SO4(aq) is mixed with 18.50mL of 0.19M Ca(OH)2 (aq)

    asked by Anonymous on October 17, 2011
  2. chemistry

    40 mL of 0.150 M ammonium hydroxide is added to 20 mL of 0.3 M perchloric acid. What is the final pH of the resulting solution?

    asked by Anonymous on May 17, 2017
  3. chemistry

    30.0 mL 0.200 M lithium hydroxide is added to 50 mL of 0.1 M nitrous acid. What is the final pH of the resulting solution?

    asked by YT on May 17, 2017
  4. chemistry

    Find the amount of solute deposit when 200 cm 3 of the solution is cooled from 55oc to40oc.

    asked by Stephen on December 28, 2011
  5. math

    What is the area of the region bounded by the x-axis and the lines x+y=24 and 3x-2y=12? Please show full solution and explanation

    asked by K on December 19, 2017
  6. Science - chemistry

    The osmotic pressure of a solution of MgCl2 is 5.43 atm at 25 oC. How much of the salt is dissolved in 250.0 ml of water?

    asked by Teagan on June 8, 2014
  7. alg 2

    2 questions: 1. Find "a" if (-3,7) is a solution of 2x+ay=26 2. solve system using substitution, linear combination, and graphing: 3x-2y=3 5x+4y=16

    asked by Mariya on September 5, 2007
  8. Algebra 2

    2 questions: 1. Find "a" if (=3,7) is a solution of 2x+ay=26 2. solve system using substitution, linear combination, and graphing: 3x-2y=3 5x+4y=16

    asked by Mariya on September 5, 2007
  9. Chemistry

    How many grams of magnesium sulfate would you need to make 0.500 L of a 10.0% M/V solution in water? Please show work.

    asked by Margaret on February 18, 2013
  10. Science

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

    asked by Shanton on January 2, 2018
  11. 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
  12. Math

    After deducting10% from sum and then 20% from the remainder₹3600 are left.Find original amount.Solution

    asked by Prateek on June 8, 2017
  13. Organic Chemistry

    calculate how much of 10% aqueous sodium carbonate would be required to neutralize the solution (This is during the preparation of benzocaine)

    asked by Emma on April 3, 2012
  14. Chemistry

    find the concentration of h3o in a .86mol/l solution of the weak acid H2O2 (kA=2.4x10-12)

    asked by Buck on May 31, 2016
  15. Chemistry, Solutions

    Two or more combined substances that do not react form a _________. solution mixture substance compound

    asked by Jason on September 16, 2010
  16. Chemistry

    What is the pH of a 0.40 mol L^-1 H2Se solution that has the stepwise dissociation constants Ka1 = 1.3 × 10^-4 and Ka2 = 1.0 x 10^-11 ? Thanks in advance

    asked by Elaina on June 21, 2015
  17. Science

    How many kilos of ammonia (N1H2)are contained in 600L of a solution that is8% NC13 by volume

    asked by Carrisse on July 16, 2013
  18. math

    Show you solution. List the terms that complete a possible pattern in each of the following: a)38,33,28,23,18,_,_,_ b)640,320,160,80,_,_,_ c)7,8,15,23,38,_,_,_

    asked by Anonymous on September 24, 2010
  19. Chem 132

    If the density of a 40.0 mass % solution of ethylene glycol in water is 1.0514g/mL at 20 celcius what is the molarity

    asked by RB on September 24, 2014
  20. Chemistry(Please check)

    Which 0.10M solution has the lowest pH? NaCl, KCN, LiF, RbClO, all have the same pH. I think that the answer is that they all have the same pH. Would you agree? Thank you!

    asked by Hannah on April 1, 2012
  21. chem

    The concentration of a benzene solution prepared by mixing 12.0 g C6H6 with 38.0 g CCl4 is__________ molal.

    asked by jessie on September 15, 2010
  22. algebra

    Find the radius and the center of the circular section of the sphere |r| = 17 cut off by the plane r·(i+2j+2k) = 24. Solution

    asked by shamma on October 4, 2017
  23. chemistry

    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 27, 2009
  24. Chemistry

    If a solution is made by mixing 50.0 moles of KOH to 3.4 kilograms of water, what is the solutions molality?

    asked by Samuel on February 26, 2011
  25. Chemistry

    If a solution is made by mixing 50.0 moles of KOH to 3.4 kilograms of water, what is the solutions molality?

    asked by Samuel on February 26, 2011
  26. Chemistry

    If a solution is made by mixing 50.0 moles of KOH to 3.4 kilograms of water, what is the solutions molality?

    asked by Samuel on February 26, 2011
  27. General Chemistry I

    Determine the mass of Co(NO3)2 X 6H2O to prepare 250mL of a .50M stock solution.

    asked by Toni on February 28, 2011
  28. Math

    I need to graph solution sets for linear inequalities. How do I do this? I've done these kind already send me an example of one and i'll explain its probably similar to the ones i did.

    asked by Sam on January 10, 2007
  29. 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
  30. Chemistry

    What volume of a 0.578 M potassium hydroxide solution is needed to exactly neutralize 3.26 grams of KHP ?

    asked by Anonymous on October 21, 2011
  31. Chemistry

    What volume of a 0.578 M potassium hydroxide solution is needed to exactly neutralize 3.26 grams of KHP ?

    asked by Anonymous on October 21, 2011
  32. Chemistry

    How many total mL of 1 M NaOH can you add to the solution in problem 1 and still have a good buffer (that is, within 1 pH unit of the pka)?

    asked by Irving on September 5, 2017
  33. 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
  34. algebra

    solve using the subsitution method 4x+4y=36 4x+4y=12 If the system has no solution or an infinite number of solutions, please help me understand it.

    asked by mema on June 9, 2011
  35. college math

    Solve. write the solution set using interval notation 9-(7x-9)is greater than or equal to sign -8(x+1)-8

    asked by Anonymous on September 19, 2010
  36. biochemistry

    How do you calculate the PH of a buffer solution prepared by mixing 75 mL of 1.0 M lactic acid and 25 mL of 1.0 M sodium lactate?

    asked by nicki on September 18, 2010
  37. math

    If 4 7 47 of 35 35 is divided by 2 9 29 of 21 21 , what is the quotient? Write the solution as a mixed number or a fraction in lowest terms.

    asked by Anonymous on September 23, 2017
  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

    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
  40. math

    Determine the solution of the following systems of linear equations using elimination. Briefly explain your work. 3x +2y = 19 2x – 3y = -6

    asked by jordan on December 22, 2015
  41. Bio

    How much NaC3H5O3 (in grams) is needed to create a 1000 ml volume of Ringer’s lactate solution?

    asked by Joe on September 6, 2011
  42. chemistry

    Determine the mole fraction of each substance in a solution containing 36.0g H2O and 46g glycerin, C3H5(OH)3

    asked by chantal on April 15, 2014
  43. Chemistry

    The mass of lead bromide that is dissolved in 250 mL of a saturated solution is____ grams.

    asked by Kat on May 27, 2016
  44. 3rd grade

    a solution of 30% ethanol by weight has a density of 0.96g/ml at 25 degree celsius. find the molarity.

    asked by pat.. on September 30, 2010
  45. 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
  46. chemistry

    What volume of water should be added to 50 ml of HNO3 having specific gravity 1.5g ml-1 and 63.0%by weight to have one molar solution

    asked by adarsh on June 13, 2015
  47. Chemistry

    500 mL of water is added to 25 mL of 6.0 M hydrochloric acid. What is the final concentration of this solution in mol/L?

    asked by Ashley on October 5, 2009
  48. 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
  49. Chemistry

    Calculate the weight of anhydrous Na2CO3 necessary to prepare M/20 solution in 100cm3 volumetric flask

    asked by Sylvia on June 28, 2017
  50. 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
  51. chemistry

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

    asked by kate on May 29, 2009
  52. Organic Chemistry

    2. Why doesn’t the neutral organic compound (Flourene) dissolve in 1.5 M sodium hydroxide solution?

    asked by Dora on November 4, 2008
  53. 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
  54. chemistry

    What would be the concentration of a solution made by dissolving 0.5 moles of KCl in 750ml liters of water?

    asked by Juliettte on March 5, 2011
  55. 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
  56. Chemistry

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

    asked by Kelsey on October 30, 2017
  57. chemistry

    The Henry's law constant for CO2 is 3.1 x 10-2 mol/L-atm at 25°C. What pressure would be necessary in order to have a .25 M solution?

    asked by S on February 5, 2015
  58. 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
  59. chemistry

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

    asked by bob on May 20, 2009
  60. 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
  61. CHEMISTRY

    GIVEN A 30G OF ALCL3 DISSOLVED IN 250G OF WATER TO CME UP WITH 400ML SOLUTION WHAT IS THE NORMALITY ?

    asked by Savannah on July 31, 2017
  62. Chemistry (again)

    What mass of NaOH is required to precipitate all the Fe2+ ions from 52.0 mL of 0.200 M Fe(NO3)2 solution?

    asked by Alex on September 28, 2010
  63. Chemistry

    An aqueous solution is 1.33 molality in method determine the amount fraction of methenal and water

    asked by Aman on August 10, 2013
  64. algebra

    use method of substitution to solve the system of linear equations. 2x-y=3 9x-4y=14 is the solution an ordered pair(,)

    asked by scott on March 30, 2012
  65. chemistry

    How many moles of water form when 40.0 ml of .800 M HNO3 solution is completely neutralized by NaOH?

    asked by mary on September 12, 2010
  66. chemistry

    Determine the osmotic pressure (in psi) , at 75.0o F, of an aqueous solution that is 2.60 % sodium sulfate by mass

    asked by G-Unit 32 on February 9, 2010
  67. 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
  68. algebra

    Solve. Where appropriate, include approximations to the nearest thousandth. If no solution exists, state this 3^(2x + 1) = 243

    asked by allice on September 11, 2010
  69. algebra

    Solve. Where appropriate, include approximations to the nearest thousandth. If no solution exists, state this. log[5] (5x - 1) = 1

    asked by mar on September 10, 2010
  70. 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
  71. 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
  72. Biochemistry

    Calculate [H+] or [OH-]as required for each of the following solutions at 25degrees and state whether the solution is neutral, acidic or basic

    asked by Mervis on June 10, 2017
  73. Chem

    What is the concentration of a solution made by diluting 85 mL of 6.0 mg/L free chlorine to a final volume of 750 mL?

    asked by Z on September 19, 2015
  74. AP Chemistry

    Consider 67.0 mL of a solution of weak acid HA (Ka = 1.00 10-6), which has a pH of 4.500. What volume of water must be added to make the pH = 5.000?

    asked by Bill on February 7, 2012
  75. Chemistry

    1. Outline a procedure to prepare an ammonia/ammonium buffer solution. I'm confused how to start it off.

    asked by Emily on May 25, 2018
  76. 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
  77. chemistry

    How many grams of sucrose would you dissolve in water for a total volume of 500mL to make a 5% solution?

    asked by jami on January 20, 2010
  78. Chemistry

    Describe how would you prepare .005M solution of IO3^-1 starting with potassium iodate KIO3

    asked by Gweedo on June 9, 2009
  79. 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
  80. chemistry

    how to Calculate the molarity of a solution if sulphuric acid contains 13%H2SO4 by mass and density is 1.02 gm per cm3.

    asked by hari on May 4, 2012
  81. Linear Equations

    Solve using the elimination method. If the system has no solution or an infinite number of solutions, state this. -2x - 8y = 22 -6x - y = 20

    asked by Kelli on May 23, 2011
  82. Algebra

    Solve using the substitution method. If the system has no solution or an infinite number of solutions, state this. -x + 6y = 54 3x + y = 9

    asked by Wayne on May 23, 2011
  83. chemistry

    how to Calculate the molarity of a solution if sulphuric acid contains 13%H2SO4 by mass and density is 1.02 gm per cm3.

    asked by hari on May 4, 2012
  84. chemistry

    Neoton - Raphsune method in excel that sulibility Ba(Io3) in Ba(No3)2 solution, .02M

    asked by ghader on June 8, 2018
  85. math

    If the solution to the linear programming problem exists, then it has to be at a corner point.it is true or false?

    asked by sateko on April 18, 2011
  86. Easy Chemistry

    How long (in minutes) must a 5.40 A current be passed through an aqueous solution of zinc nitrate to deposit 87.5 g Zn?

    asked by Morgan on October 20, 2014
  87. math

    solve the polynomial ineqaality. express the solution set in interval notation. x^3+x^2+64x+64>0

    asked by Kelli on January 4, 2013
  88. C

    number of moles of NaOH required to titrate 38.05mL of a 1.500 M H3PO4 solution

    asked by Nick on October 11, 2011
  89. Chemistry

    number of moles of NaOH required to titrate 38.05mL of a 1.500 M H3PO4 solution

    asked by Tyler on October 12, 2011
  90. 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
  91. math

    22_

    asked by janay1978 on June 9, 2009
  92. Math

    solve using the multiplication principle. don't forget to perform a check. 12x=-96 the solution is x=

    asked by Tom on September 27, 2009
  93. chemistry

    Calculate how much energy will be released when 11.11g of calcium chloride are dissolved in 100ml of solution

    asked by Mandy on May 2, 2009
  94. 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
  95. 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
  96. Chemistry

    Determine the hydronium ion concentration in a solution that is 0.00039 M HCl. Answer in units of M.

    asked by Kiara on May 12, 2018
  97. Chemistry 2

    Calcualte PH and POh of an aqueous solution that is 0.050 M in HCL and 0.085 M in HBr at 25 degrees C

    asked by Jason on February 21, 2014
  98. science

    What is the percent concentration of 0.4 M K2SO4 solution? Atomic mass: K-39g,S-32g, O-16g

    asked by mustafa on November 18, 2015
  99. 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
  100. Math

    Question: Describe and fix the error in the following solution 9.50 - 7.18 = 2.48 Answer: I really don't see the mistake in this problem.

    asked by Cameron on November 18, 2015

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