1. chemistry

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    asked by ad on September 21, 2010
  2. Chemistry

    How many moles of HNO3 are present in 35.0 mL of a 2.60 M solution of nitric acid?

    asked by Veronica on October 7, 2010
  3. calculus

    find the general solution to the differential equation. dy/dx=secxtanx-e^x

    asked by Anonymous on February 25, 2011
  4. math,correction

    Graph each of the following equations by first solving for y. 2x – 3y = 12 so it would be: y = 2/3x – 4 and the solutions points would be: So (-3,-6) is a solution

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  5. precalculus

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  7. chemistry

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  9. chemistry

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  10. chemistry

    Which must be a mixture of substances? a- Solid b- Liquid c- Gas d- Solution

    asked by John on March 5, 2008
  11. Algebra

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    asked by Niki on January 22, 2016
  12. Chemistry

    What effect does diluting the sodium hydroxide have on the basicity of the solution?

    asked by Dick Rogers on December 15, 2007
  13. Chemistry HELP URGENT PLEASE!!!

    what current (in amperes) is required to plate out 2.85 g of Cr from a Cr^3+ solution in a period of 2.50 hr?

    asked by Maho on March 17, 2014
  14. history

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    asked by aria on May 12, 2016
  15. MATH

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    asked by Ash on January 28, 2017
  16. Chemistry

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    asked by Alice on February 19, 2009
  17. ap chemistr

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    asked by gabriella on February 4, 2014
  18. Chemistry

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    asked by Jematormal91 on March 29, 2012
  19. physics

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    asked by physics123 on February 20, 2012
  20. chemistry

    how would you prepare 1L of a .5M solution of each of the following? Sodium carbonate from the pure solid

    asked by kelly on August 25, 2010
  21. chemistry

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    asked by Samantha on June 6, 2011
  22. math

    A=29 degrees, a= 5, b=13, How many solutions are there for triangle ABC and whats the solution(s)

    asked by lindsey on May 3, 2011
  23. physical science

    list two safety procedures to create a supersaturated solution

    asked by matthew on May 3, 2011
  24. CHM

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    asked by ami on June 27, 2010
  25. Chemistry

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    asked by sarah on February 24, 2011
  26. Chemistry

    How to calculate the density and viscosity of a 10 % by wt salicyclic cid solution.

    asked by arp on February 15, 2010
  27. CHEMISTRY

    CONC.OF NO2^-AND H3O^+IN A SOLUTION IN WHICH 4.5% OH HNO2 WAS IONIZED

    asked by JOSEPH on October 20, 2017
  28. chemestry

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    asked by crystal on April 25, 2013
  29. Chemestry

    Find the molarity of a solution containing 0.75 mol of NaCl with a volume of 1.5 L.

    asked by Becky on November 23, 2012
  30. science

    Explain why the temperature of water might increase when a solution forms.

    asked by Morgan on October 6, 2012
  31. chemistry

    What is the boiling point of an aqueous solution that freezes at -6.7 degress C. Please help.

    asked by swtnblk on November 5, 2011
  32. chemistry

    How much water must be added to 6.0 mL of a 0.05 M stock solution to dilute it to 0.020 M?

    asked by Anonymous on May 21, 2011
  33. Chemisty

    calculate pH of 50.0 mL of a .100 M solution of the weak monoprotic acid HX

    asked by Emily on March 29, 2010
  34. Chemistry

    How many grams of perchloric acid are dissolved into 3.86 L of water, if the pH of the solution is 4.03.

    asked by Jose on May 11, 2016
  35. Some basic concept of chemistry

    0.5M aluminum sulphate aques solution normality calculation

    asked by Chhaya on January 25, 2017
  36. chemistry

    calculate the poh of 1 dm^3 of naoh solution containing 4 g of sodium hydroxide

    asked by Anonymous on May 5, 2016
  37. chemistry

    why do you use Na2Co3 extract solution tor the analysis of anions

    asked by saiful on July 25, 2011
  38. chemistry

    A solution made from 19.0 g of NaBr and 500 mL of water has what molarity?

    asked by Cindi on May 4, 2011
  39. algebra

    Find solution to equation X^2+x+ãx^2+x-2 =0 Note; square root is x^2+x-2

    asked by Jessica on July 21, 2009
  40. Chemistry II

    Calculate the freezing point of a 0.75 m solution of Al2(CO3)3.

    asked by Chase on September 16, 2009
  41. chemestry

    Calculate [OH^ - ] for strong base solution: 14.0 mL of 1.20×10−2 M Ca(OH)_2 diluted to 430.0 mL.

    asked by chris on February 22, 2012
  42. chemistry

    What volume of 0.5M H2SO4 will exactly neutralise 20cm3 of 0.1MNaOH solution?

    asked by aniekan on July 27, 2015
  43. Chemistry

    A solution is 25% by mass calcium nitrate and has a density of 1.21 g/mL what is the molarity?

    asked by Adrian on May 12, 2016
  44. science

    Which one of the solution have high boiling point 1m H3PO4 or 1m CaCl2 ?

    asked by SERHED on January 25, 2016
  45. Chemistry

    What is the molality of ammonium ions in a 1.75 m solution of (NH4)3PO4?

    asked by haley on September 16, 2009
  46. Algebra2

    Write three trigonometric equations each with the complete solution pi+2pin

    asked by steve on May 10, 2017
  47. Chemistry

    What is the maximum [Ba^2+] that can be maintained in 1.100 L of a 030 M solution of Na2SO4?

    asked by Jeremy on November 30, 2010
  48. Chemistry

    How many grams of solute are in 0.504 L of a 0.350 M K2CO3 solution?

    asked by msid on March 4, 2016
  49. chemistry

    How would you prepare a supersaturated solution of CuSo4 in 100ml of water

    asked by Jen on November 24, 2012
  50. Chemistry

    There are 200 mmoles NaOH/400ml. What is the molarity of the solution?

    asked by Jessi on April 21, 2009
  51. Chemistry

    How many grams of NaCL are required to make 250ml of a 0.4M solution?

    asked by Jessi on April 21, 2009
  52. Chemistry

    need help to balance half reaction in basic solution IO3 to I2

    asked by Shana on July 27, 2013
  53. math

    tell whether the point (9,3) is a solution of the inequality 4x-5y

    asked by maya on April 22, 2009
  54. Chemistry

    when 5.00 g of CaCl2 dissolves in 50.0g of water, what is the boiling point of the solution

    asked by Leah on April 17, 2011
  55. chemistry

    What would be pH of a 0.01 M solution of a very expensive weak base, unobtainamine, whose pKb is 3.8? 1. 2.9 2. 14 3. 2 4. 7 5. 11.1

    asked by Anonymous on February 7, 2015
  56. Chemistry

    How many g of CaCl2 are required to prepare 0.250 L of a 0.200 M solution?

    asked by Aaron on December 13, 2015
  57. College Chem II

    Determine the [H3O+] of a 0.160M solution of benzoic acid.

    asked by Katie on March 7, 2010
  58. Maths

    How can it be possible for a set of inhomogeneous simultaneous equations to have no unique solution?

    asked by Alice on April 28, 2009
  59. Chemistry

    what is the pOH of a solution that has a OH- cincentration equal to 1,36 multiple by 10^-10M?

    asked by prudence on April 6, 2018
  60. Math

    Write three fractions that can be written as percents between 50% and 75%. Justify your solution Can you please help me????

    asked by Jenna on September 28, 2016
  61. science

    what is the solute and solvent in a solution made from 15 mL of oxygen and 5 mL of helium?

    asked by jan on November 4, 2010
  62. chemistry

    how many ml of 0.15 NaOH solution are required to neutralize 35.00 ml of 0.22 moles of HCL

    asked by mc on April 14, 2010
  63. Math

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    asked by Jen on November 13, 2014
  64. science

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    asked by N/A on January 31, 2011
  65. math

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    asked by toby on July 21, 2015
  66. math

    state the value of the discriminant and the discribe the nature of the solution 20x^2-8x-17=0

    asked by marie on August 29, 2010
  67. Chemistry

    Concentrated nitric acid is 70% HNO3 and 14.7 M. What is the density of the solution?

    asked by Julia on May 12, 2016
  68. Algebra

    PLEASE HELP ME!!! 1. Which of the following is an example of an open equation? A. -2b = 6 B. 4a - 5 = 12 C. 5Y = y +8 D. Z-15= -12 2. Which of the following equations has 3 as the solution? A. -2b=6 B. 4a-5=12 C.5y=y+8 D. Z-15=-12 my answers: 1. 8+0=8 2.

    asked by Damien666158 on October 15, 2018
  69. science

    in a solution can amounts of different components vary? like in a heterogenous mixture

    asked by bella on October 6, 2007
  70. Algebra 2

    Find the solution of the exponential form in terms of logarithms 2^(2x+13) = 3^(x-45)

    asked by Andrew on April 30, 2010
  71. CHEMISTRY.

    Calculate the ph of a solution containing 0.15M HF (ka= 7.1x10^-4) and 0.26M NaF.

    asked by Siobhan.R on May 10, 2017
  72. chemistry

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    asked by Anonymous on July 3, 2011
  73. chemistry

    How would you make 250 ml of a .51M calcium hydroxide solution?

    asked by Sarah on March 30, 2011
  74. algebra 1a

    can someone help in solving this and use set builder notations to describe the solution Please 4(8-2x)+2x

    asked by robbie on January 30, 2011
  75. Chemistry

    What is the molality of an aqueous solution that is 10.0% ethanol, C2H5OH, by mass?

    asked by Marcus on February 10, 2013
  76. Math

    1÷5 (45y+20)+3÷4 (12y=24)=19 Find solution set (9y=14)+(9y=18)=19 18y = 33÷8

    asked by Sue on July 17, 2015
  77. chemistry

    0.947 moles of NaC2H3O2 dissolved in 100 mL solution

    asked by chem on April 16, 2015
  78. Math

    Determine the quadratic equation whose solutions are: 3 and -2 Solution(with workings):

    asked by Ghiffari on October 23, 2011
  79. Chemistry

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    asked by Kevin on June 20, 2016
  80. Chemistry

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    asked by Stacy on October 12, 2012
  81. chemistry

    Could you produce a cell that contains a 1.0M solution of Fe2+ and Fe3+ ions?

    asked by Wina on March 5, 2011
  82. Chemistry

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    asked by Bigfoot on May 18, 2012
  83. chemistry

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    asked by emma 45 on March 14, 2012
  84. chemistry

    If you have 200. mL of a 0.50 M solution of KOH and you wish to dilute it to 0.30 M, how many mL of water should you add?

    asked by Anonymous on April 7, 2011
  85. Jane

    I am confused what would be a real-life solution using polynomial division.

    asked by Math on January 21, 2010
  86. chemistry

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    asked by Emily on August 21, 2013
  87. chemistry

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    asked by Anonymous on March 4, 2011
  88. chemistry

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    asked by yui on March 4, 2011
  89. Calculus

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    asked by Daniel on December 4, 2008
  90. Math urgent

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    asked by Ayushma on September 7, 2008
  91. pharmacology

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    asked by carol on March 9, 2017
  92. chemistry

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    asked by Anonymous on December 12, 2014
  93. Chmistry

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    asked by Fofo on February 6, 2016
  94. Chemistry

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    asked by taytay on April 20, 2014
  95. chemistry

    You have 37.0 mL of a 3.00 M stock solution that must be diluted to 0.500 M. How much water should you add?

    asked by Brianna on January 21, 2013
  96. Science

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    asked by Md Shams Rizvi on March 10, 2017
  97. chemistry

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  98. school math 3rd grader

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  99. Chemistry

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    asked by L.Bianchessi on March 5, 2012
  100. chemistry

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