1. HHS

    What is the molality of a solution in which 15g of I2 is dissolved in 500g of alcohol?

    asked by jaz on April 4, 2011
  2. 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 asdffffff on April 6, 2011
  3. Algebra help pls

    3+6z=13+6z A Z= -5/6 B Z= 2 2/3 c Has infinite solutions D Has no solution How can i solve this idk how to start

    asked by Blaw on September 19, 2017
  4. Science

    Calculate the molality of 48.2 percent by mass KBr solution?

    asked by Donna on April 2, 2019
  5. science

    A 25 ml solution of 0.5 M NaOH is titrated until neutralized into a 50 ml sample of HCl

    asked by Ayomide on June 27, 2018
  6. Chemistry

    What mass of KBr is required to prepare 8.oo L of .400 M solution?

    asked by Nicole on September 10, 2012
  7. Chemistry

    What is the purpose of adding distilled water to an HCl solution?

    asked by Lei on October 6, 2013
  8. chemistry

    What is the number of moles of NaOH in 1.91 mL of a 872.25 molar solution?

    asked by chels on October 19, 2011
  9. calculus

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

    asked by Anonymous on February 25, 2011
  10. chemistry

    Calculate the pH of a solution prepared by mixing 25.0 mL of 0.60 M HC2H3O2 and 15.0 mL of 0.60 M NaC2H3O2?

    asked by Julie on May 6, 2010
  11. chemistry

    Calculate the grams of Ca(OH)2 used to make 500 mL of a 0.150 M solution.

    asked by gab on April 30, 2018
  12. history

    Evaluate the effectiveness of nixon's solution. was it successful? how do you determine this?

    asked by aria on May 12, 2016
  13. Chemistry

    A 0.10M solution of a certain monoprotic weak acid has a pH of 2.44. Calculate Ka.

    asked by Jackson on March 1, 2016
  14. general chemistry

    Calculate the molarity of each of the following solutions.70.8g C2H60 in 2.51L of solution

    asked by kelia on March 7, 2013
  15. Chemistry

    Determine the percent ionization of a 2.45 M solution of benzoic acid

    asked by Gabby on February 27, 2015
  16. Some basic concept of chemistry

    0.5M aluminum sulphate aques solution normality calculation

    asked by Chhaya on January 25, 2017
  17. Algebra

    Use set builder notation to describe the complete solution. 5[3m-(m+4)]>-2(m-4)

    asked by Sadie on May 5, 2009
  18. chemistry

    The solubility of AB(s) in a 1.000-M solution of C(aq) is found to be 0.121 M. What is the Ksp of AB?

    asked by help please on May 7, 2014
  19. chem 150

    calculate the molarity of 700grams of NaOH in 2 liters of solution

    asked by nick on June 22, 2011
  20. Math

    write three fractions that can be written as percents between 50% and 75%. Justify your solution.

    asked by Jen on November 13, 2014
  21. chemistry

    Determine the molarity of a 2.15-L aqueous solution containing 1.45 moles of KCl.

    asked by Anonymous on November 15, 2011
  22. algebra

    what is the solution of the following linear system? 5x - 2y = 15 5/3x - y = 5 a)(-2,1) b) none c)(3,0) d) inifinite number if solutions

    asked by candy on April 29, 2010
  23. chemistry

    What is the pH of the solution created by combining 2.20 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)?

    asked by bme1 on April 17, 2010
  24. math

    what is the 7th term of the geometric sequence 10,2.2/5,2/25 (show your solution)

    asked by eljone on August 16, 2016
  25. Physic

    Show that the function y(x,t) = X^2 + V^2t^2 is a solution of the general wave equation.

    asked by Godwin on January 4, 2016
  26. Algebra 2

    solve the inequality. Graph the solution set. 5r + 4 is less than or equal to 5

    asked by bubblegum on September 3, 2015
  27. algebra

    what is the solution of the following system of equations? 2y - x = 8 y = 2x + 1 a) (1,2) b) (5,2) c) (2,1) d) (2,5) and the answer i picked is c thank you, poo :)

    asked by poo on April 29, 2010
  28. Science

    In an acidic solution, why is the OH- concentration lower than it is in pure water?

    asked by Sheryl on October 22, 2011
  29. CHEMISTRY

    What concentration of aqueous CaCl2 solution freezes at -10.2ºC?

    asked by Anonymous on November 23, 2010
  30. Chemistry

    Calculate the pH of a solution that is 0.185M in HC2H3O2 and 0.125M in KC2H3O2

    asked by Gabby on March 6, 2015
  31. 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
  32. Mathematics

    use rolle's theorem to show that the equation 7x^6-9x^2+2=0 has at least one solution in the interval (0,1)

    asked by Anonymous on February 22, 2015
  33. org chm

    how many grams of KOH are needed to make 590 ml of a solution with a pH of 11.35?

    asked by carol on November 17, 2010
  34. Differential Equation

    Find the general solution of (D^2-3D+2)(D-5)^Dy=0. (Hint:Use the auxiliary equation)

    asked by Maegan on July 14, 2012
  35. 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
  36. chemistry

    Calculate the molality of CsCl in a 19% by mass aqueous solution.

    asked by cheri on September 13, 2012
  37. Physics

    Show that the function y(x,t) = X^2+V^2t^2 is a solution of the general wave equation.

    asked by Godwin on January 4, 2016
  38. chemistry

    what is the pH of a solution that has 12.2 grams of hydrochloric acid in 500 ml of water

    asked by kandace on March 5, 2013
  39. Math

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

    asked by Ghiffari on October 23, 2011
  40. Algebra

    I have answered the question but not sure how to check for extraneous solution. x/(5x+4)=3 The answer is -6/7

    asked by Eric on February 8, 2017
  41. Science

    The formula wt of h2so4 is98bthe wt of the acid in 400ml of 0.1M solution is

    asked by Anonymous on September 5, 2017
  42. Math

    If x = xo and x = x1 are both vector solution of Ax=b, then x1 - xo is in the Null Space of A. True or False?

    asked by Anonymous on September 7, 2012
  43. Chemistry

    A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].

    asked by Anonymous on April 27, 2014
  44. Science

    Calculate the pH of an aqueous solution containing 1.3 * 10^-2 M HCl, 3.0 * 10^-2 M H2SO4, and 2.0 * 10^-2 M HCN.

    asked by Will Coppock on July 24, 2012
  45. AP Chemistry

    What is the molarity of 827 mL of a solution that contains 0.057 mol of solute?

    asked by Chelsea on September 17, 2012
  46. Algebra

    Solve the equation 5x+7=13-7x graphically. then check your solution algebraically.

    asked by Adri on November 2, 2011
  47. Chemistry

    Calculate the volume of 0.3MHCL used to neutralise NaOH solution

    asked by Chris on March 25, 2013
  48. Chemistry

    in any aqueous solution what effect does the addition of NaOH (aq) have on the concentration of H+ (aq)

    asked by Lisa on June 6, 2012
  49. Mendulo

    what mass of H2SO4 is contained in 25g of 15percent w/w solution?

    asked by Titus on August 21, 2016
  50. biochemistry

    What mass of CH3COONa must be added to 50.0 mL of 0.50 M CH3COOH to make a solution of pH 6.0 ?

    asked by nurul on March 9, 2015
  51. calculus

    solution for limit as delta x approaches 0 (1-cos4x/1-cos2x)

    asked by Anonymous on June 28, 2012
  52. chemistry help

    What mass of Kbr is present in 25 mL of a 0.85 M solution of potassium chloride?

    asked by tom on May 10, 2009
  53. chemistry

    what is the concentration of na and co3 ions in 0.2M aqueous solution of na2co3

    asked by Anonymous on August 20, 2016
  54. Biology- PLEASE HELP ME ):

    how does the salinity of a solution affect osmosis in an onion cell?

    asked by Kasey on March 1, 2011
  55. Maths

    Solve the equation(GS general solution) 5sin^2x-3sinx-2=0

    asked by Ndaba on August 23, 2017
  56. College chemistry

    How do you calculate the number of mL you would use to prepare 5.0 L of 0.20 M NaOH from a 5.23 M stock solution.

    asked by laney on April 26, 2010
  57. chemistry

    0.30M nh3 and 0.20M HCL calculate the ph of solution kb=1.8 × 10^-5

    asked by kanks on March 2, 2013
  58. chemistry

    Calculate the number of mL you would use to prepare 5.0 L of 0.20 M NaOH from a 5.23 M stock solution.

    asked by laney on April 26, 2010
  59. chemisty

    how we prepare 0.5 mol of solution of hcl in 70ml in water

    asked by asif on November 15, 2015
  60. Chemistry

    What is the molality of the solution that results when 33.3g of C2H5OH are added to 76.7g of water?

    asked by Anonymous on May 2, 2014
  61. chemistry

    Calculate the pH of an aqueous solution containing 1.6 x 10-2 M HCl, 2.0 x 10-2 M H2SO4, and 1.8 x 10-2 M HCN.

    asked by alyssa on November 19, 2011
  62. chemistry

    what is the concentration of a 250 ml solution that contains 44 grams of magnesium fluoride

    asked by Emily on August 21, 2013
  63. Chemistry

    What is the molarity of a solution containing 40 grams of NaOH in 100 ml of soution

    asked by corinna on July 13, 2011
  64. Chemistry

    3.50 g of NH4Cl is added to 18.8 g of water. Calculate the molality of the solution.

    asked by Shardai on October 16, 2013
  65. algebra

    can you please show me how to do this? Determine whether the ordered pair is a solution of the inequality. y>x^2- 5x (2,-3)

    asked by Tyriq on August 25, 2010
  66. Algerbra I

    Help! I don't get this. solve each inequality. Graph the solution set, if there is one. 1. n-4>11 2. 4q7 4. a+3s/3 8. x/2-4>-6

    asked by Jared on February 4, 2008
  67. math

    How do I draw a diagram to show how to find the solution to 2.6 divided by 0.4

    asked by Buggy boo on September 10, 2013
  68. chemistry

    what is the iobic equation of zinc +iron(ll)sulphate solution

    asked by demiz on March 17, 2015
  69. 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
  70. please help analytical chemistry

    what is the activity coefficient of SO4^2- when the ionic strength of a solution is .1?

    asked by holly on March 9, 2013
  71. Inorganic chemistry

    What change in coulombs, is required to deposit 0.301 g Cu(s) from a solution of Cu^2+(aq)

    asked by Steve on April 11, 2009
  72. Science

    Determine the pH of a .10M solution of KA, the potassium salt of HA. For HA, Ka=1.0x10^-5

    asked by Stephanie on August 8, 2012
  73. Chemistry

    what is the pH of a solution created by adding 15.5 g of KClO to 228 mL of 1.08 M HClO(aq).?

    asked by Carl on March 12, 2015
  74. chemistry

    What is the final volume in milliliters when 0.698 of a 42.2 (m/v) solution is diluted to 21.1 (m/v)?

    asked by Anonymous on July 22, 2012
  75. chemistry

    What is the pH of the solution created by combining 2.80 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HC2H3O2(aq)? I got 1.3. is that correct?

    asked by ibob on April 29, 2009
  76. chemistry

    Determine the molar solubility (S) of Zn(CN)2 in a solution with a pH = 4.91. Ksp (Zn(CN)2) = 3.0 × 10-16; Ka (HCN) = 6.2 × 10-10.

    asked by Jackie on March 21, 2013
  77. Algebra

    I have to identify the system of equations, if any for: -2x-4=1, 12=-6x-3 no solution? infinitely many solutions? (0,-1)? or (-1,0)?

    asked by Sandra on May 4, 2014
  78. science

    Calculate the pH of the solution 5ml of M/5,HCl+10ml of M/10 NaO

    asked by KANNAN on August 12, 2016
  79. Chemistry

    What is the molarity of a solution of H3PO4 if 11.1 mL is neutralized by 33.2 mL of 0.161 M NaOH?

    asked by taytay on April 20, 2014
  80. chemistry

    a 100ml solution of 0.01M sodium chloride has how many ppm (mg/L) please?

    asked by lynda on June 2, 2012
  81. Algebra

    How do you solve the following problem? 3(4+4x)= 12x+2 It has no solution. X can be any value, and it wont equal.

    asked by James on April 10, 2007
  82. chemistry

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

    asked by Sarah on March 30, 2011
  83. Chemistry

    What is the density of a solution of 9.0% Calcium chloride dissolved in water?

    asked by Cassie on September 9, 2012
  84. Chemistry

    A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].

    asked by Anonymous on April 27, 2014
  85. Chemistry

    How many moles of methanol are dissolved in 1.5 L of water to make a 2.0 m solution?

    asked by Bigfoot on May 18, 2012
  86. Chemistry

    What volume of .225 M aluminum chloride solution contains 5.0 g solute?

    asked by Susan on March 12, 2015
  87. chemistry

    Suggest a technique the student could try to reduce the concentration of the 12 M solution.

    asked by sam on April 3, 2011
  88. Algebra help pls

    Which ordered pair is a solution of the equation y=4x? A (1,3) B (-1,-4) C (-4,-1) D(1,-4) Can Someone help me solve this pls ?

    asked by Blaw on September 19, 2017
  89. Chemistry

    How many grams of KOH must be dissolved in one litre of solution to give it a pH value of 12?

    asked by Sahil on June 29, 2011
  90. math

    write an integer for each solution a salary increase of $250

    asked by Alex on September 9, 2013
  91. Mathematics

    Determine the quadratic equation whose solutions are: 3 and -2. Explain your solution

    asked by Jessica on October 21, 2011
  92. Chemistry

    Calculate the molar solubility of Cr(OH)3 in a solution with a PH of 11.6 knowing that the Ksp(Cr(OH)3)=6.7×10^-31.

    asked by Last on March 25, 2019
  93. 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
  94. math

    -4x-4y=12 16y=-16x-48 identify the solution of the system or equatuions

    asked by sabrina on April 19, 2014
  95. Math Help Me Please

    4 Determine which ordered pair is not a solution of y= -5x – 4 A (10, -52) B (7, -39) C (-7, 31) D (8, -44) I don't know how to solve it?

    asked by SmartyPants on March 17, 2015
  96. algebra

    needing help with is problem solve for x: 3x-2y=-6 here is my solution 3x - 2y = -6 3x = 2y - 6 x= 2y -6/3 x=2/3y-2 yep that's correct.

    asked by jessica on April 10, 2007
  97. MATH

    A 0.26 M solution of a weak acid HA is 0.35 % ionized. What are the H+ , A- , and HA concentrations at equilibrium? What is Ka?

    asked by Ash on January 28, 2017
  98. Social studies

    who advocated for the solution of medicine and health in the progressive era?

    asked by Anonymous on September 25, 2017
  99. Math help!

    What is the value of y in the solution set of the system of linear equations shown below? y=-x+12 4x-2y=36 A. 10 B. 8 C. 6 D. 2*** I think its D but Im not sure, help?

    asked by Answers on February 5, 2019
  100. 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