1. chemistry

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

    asked by demiz on March 17, 2015
  2. 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
  3. Chemistry

    What is the pH when 3.46 mL of 2.37 M KOH is added to 26.9 mL of a 1.78 M solution of formic acid (HCOOH)?

    asked by sarah on February 24, 2011
  4. chem

    How many chloride ions are present in 65.5 mL of 0.210 M AlCl3 solution

    asked by Anonymous on February 11, 2015
  5. Chemistry

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

    asked by Dick Rogers on December 15, 2007
  6. Chemistry

    A solution has 140 grams of KOH dissovled in 5 L of water. What is the pH ?

    asked by Emma on February 26, 2014
  7. Chemistry

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

    asked by Nicole on September 10, 2012
  8. chemistry

    why should you be care when you heat your NacL solution to evaporate the water?

    asked by Anonymous on June 1, 2010
  9. algebra

    Solve the compound inequality graph solution 6x-410

    asked by Tammy on February 25, 2014
  10. Math

    How would I find the solution set for a system of linear inequalities? For example, x-3y

    asked by HEL on July 27, 2014
  11. Algebra

    I posted this before but could not understand the answer. How do I write the solution set of: {x| } for (x+20)(x -10)(x+11)>0

    asked by Daniel on May 30, 2010
  12. math

    which of the ff. coordinates of points belong to the solution set of the inequality y

    asked by =) on July 27, 2014
  13. Biology- PLEASE HELP ME ):

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

    asked by Kasey on March 1, 2011
  14. AP CHEM

    A solution formed by mixing 13.0 mL of 0.013 M Ba(OH)2 with 31.0 mL of 7.0 ✕ 10-3 M NaOH. Calculate [OH-]

    asked by Jordyn on February 17, 2015
  15. Science

    How do you prepare 500mL of a 2.5M solution of NaOH from the solid compound?

    asked by Cassie on December 9, 2012
  16. chemistry

    What is the concentration of a solution containing 25g of NaCl in a 250mL sample?"

    asked by Samantha on June 6, 2011
  17. 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
  18. math

    Solve the inequality = 3- 2x ˂ x ¡Ü 2x + 5 and show the solution on the number line

    asked by kudu on February 15, 2015
  19. 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
  20. math

    use set-builder notation to describe the complete solution 5[3m-(m+6)]>-6(m-5)

    asked by jay jay on July 14, 2008
  21. AP Chem

    Determine the [H3O^+] of a 0.240 M solution of formic acid.

    asked by Eddie on March 21, 2010
  22. chemistry

    how many grams of potassium carbonate are in 75.0ml of a 2.44M solution?

    asked by elmi on May 3, 2015
  23. algebra

    solve x-4

    asked by babygirl on September 7, 2011
  24. chemistry

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

    asked by cheri on September 13, 2012
  25. precalculus

    (y+1)(y+3)(5y-2)=0 That is an equation. What is the question? Are you supposed to multiply it out or say what the solution values of y are?

    asked by Roxanne on March 7, 2007
  26. chemistry

    describe how you can crystallize potassium nitrate from its aqueous solution

    asked by ziki on April 30, 2011
  27. 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
  28. science

    Calculate the concentration of all species in a 0.145M solution of H2CO3

    asked by Kris on March 18, 2015
  29. 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
  30. calculus

    verify that y=C1e^2x + C2e^-3 is a solution of the differential equation y''+y'-6y=0

    asked by mari on April 10, 2012
  31. science

    determine the molarity of the following solution 31 g MgF2 in 55ml H20

    asked by willie on January 8, 2013
  32. science

    determine the molarity of the following solution 31 g MgF2 in 55ml H20

    asked by willie on January 8, 2013
  33. math

    Find values of x and y, if any, that will make the matrices equal. [ x y ] = [ 3 5 ] 1 9 1 9 a. x=-3,y=-5 b. x=5,y=3 c. x=-3,y=5 d. x=3,y=5 e. no solution

    asked by laura on August 26, 2016
  34. Chemistry

    How much of NaOH (in grams) is needed to prepare 546 mL of solution with a pH of 10.00 ?

    asked by Sara on February 16, 2011
  35. Chemistry

    How much water would I need to add in order to dilute 200mL of a 5 M solution down to 2 M?

    asked by Emma on February 21, 2014
  36. Chemistry

    How much of NaOH (in grams) is needed to prepare 546 mL of solution with a pH of 10.00 ?

    asked by Sara on February 15, 2011
  37. Mendulo

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

    asked by Titus on August 21, 2016
  38. chemistry

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

    asked by Anonymous on August 20, 2016
  39. Chemistry(Please help)

    What is the pH of 0.144M aqueous solution of ammonium nitrate? I am not sure what to do. Would I do 10^-0.144^ = 0.71?

    asked by Hannah on April 7, 2012
  40. AP Chemistry

    Which is a stronger base in aqueous solution, IO- or IO3-? Explain.

    asked by Lisa on April 26, 2010
  41. Chem

    Calculate the molarity of 2.7 moles NaOH, 1.75l solution

    asked by Floyd on November 29, 2017
  42. 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
  43. biology lab

    how many grams of mercury II Nitrate will you need to prepare 500mL of a .60 M solution ?

    asked by nicole on February 24, 2017
  44. Chemistry

    Calculate the pH of a 0.250M solution of Sulfurous acid, H2SO3.

    asked by Josh on February 18, 2011
  45. 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
  46. chemistry

    Calculate the pH of a solution (to 2 decimal places) which is 0.106 M in phenol, Ka = 1.0 x 10-10.

    asked by caleb on January 10, 2008
  47. college

    to how much water should 50.0 ml of 12.0 M HCl acid to be added to produce a 4.00 M solution?

    asked by vik on March 18, 2010
  48. math

    please this is the last problem i have to do and i just can't get it thanks for anyhelp Which of the ordered pairs is a solution for the equation 2x – 5y = 10? (0, 2) (–5, 0) (–5, –2) (0, –2)

    asked by amy on January 10, 2008
  49. algebra

    Solve the compound inequality graph solution-2

    asked by jim on February 24, 2014
  50. chem

    What is the pH in a solution that has a concentration of 4.5x^-3 M HCl rounded to the nearest hundredth?

    asked by Tyler Clark on April 12, 2012
  51. Pre-Cal.

    Solve the following inequality . Write your solution in interval notations. x+3/x-3

    asked by phyllys on December 28, 2012
  52. 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
  53. Chemistry

    how do you make 50ml of .1 molar solution of benzylamine in acetonitrile

    asked by Dina on February 9, 2015
  54. Chemistry

    How many g of KCL would have to be dissolved in 60g H2O to give 25% by wt. of solution?

    asked by Devanshu on June 3, 2010
  55. Chemistry

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

    asked by Cassie on September 9, 2012
  56. Chemistry

    What happens when an electric current is passed through a solution of an ionic compound?

    asked by Aybrianna on November 13, 2017
  57. math

    Which is the value is in the solution set for the inequality -8-7x>6 A=-1 b=-2 c=-3 d=2 -8-7x>6 add 8 to each side -7x>14 -7/-7>14/-7 x

    asked by b6 on January 3, 2013
  58. algebra

    Which of the graphs below represent the graphical solution to the following system of equations? 4x + y = 5 3x – 7y = 27

    asked by Anonymous on September 18, 2011
  59. 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
  60. Chemistry

    Calculate the concentration of aqueous solution of barium hydroxide whose pH is 12

    asked by Momito on April 7, 2012
  61. Saint Louis University

    Let f(x,y)=sqrt((x-a)^2+(y-b)^2+(z-c)^2). Minimize f subject to Ax+By+Cz+D=0. what is the geometric meaning of your solution?

    asked by Micx on March 2, 2011
  62. Chemisty

    how many mole of calcium sulfate are in a 100mL of .86M solution?

    asked by Riley on November 26, 2012
  63. Algebra

    Solve |6x – 7| < = 25 and write interval notation for the solution set.

    asked by Alyssa on July 7, 2009
  64. Algebra

    Write the solution in interval notation x=-2. ) What would the compound inequality look like? Thanks for the help!

    asked by Ann on June 9, 2011
  65. 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
  66. organic bio chemistry

    how many mL of a 0.20M KOH solution is needed to neutralize 25 mL of 0.25 M H2SO4?

    asked by lisa on March 8, 2011
  67. chemistry

    calculate the normality of 4g of sodium hydroxide in 100ml of solution

    asked by arul raj on October 13, 2016
  68. mathematics

    if [x] denotes the integral part of x, then what is the solution set of the equation [x]^2 -5[x]+6=0

    asked by edward on September 22, 2012
  69. 10th grade Chemistry

    To what volume should 5.o g of kcl be diluted in order to prepare a o.25 m solution

    asked by Angelica Martinez on April 26, 2011
  70. Chem

    Specify the concentration of each ion in solution for the following: .10 M AlCl3 (aq) and .15 M (NH4)2SO4 (aq)

    asked by Sarah on February 13, 2017
  71. 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
  72. Algebra!

    Which ordered pair is a solution to the system y(line under)-x-1? A. (0,-2) B. (1,2) C. (-5,0) D. (0,-5) I'm thinking it's B.. but i need some help with this.

    asked by Allyson on June 9, 2011
  73. math

    if f(x= 5x - 1 find f(a-2) Please show me the work so I can understand how to arrive at the solution. Thank you. f(a-2)=5(a-2)-1

    asked by Diana on June 1, 2007
  74. chemistry

    how many moles of Cl- ion in the solution containing 0.187g Cl- dissolved in 50.0 ml water.

    asked by mel on October 23, 2007
  75. Math

    Write the solution of the inequality in set-builder notation: 5r+8

    asked by EmberShy on February 15, 2017
  76. Algebra

    Is the point (-3,-2) a solution of the intersection of the following set of quadratic equations: Y < -X ^ 2X^2 + Y^2< 16

    asked by Christina on April 26, 2011
  77. Chemistry

    What is the possible ionic equation of TrisEDTA solution? REDOX reaction.

    asked by Maryam on April 25, 2012
  78. Math

    Determine the number of factors of 5^x + 2•5^x+1. Choices: A) x B) x + 1 C) 2x D) 2x + 2 Please show solution:)

    asked by K on October 3, 2017
  79. Math

    Determine the number of factors of 5^x + 2•5^x+1. Choices: A) x B) x + 1 C) 2x D) 2x + 2 Please show solution:)

    asked by K on October 3, 2017
  80. math

    What is the solution of the system of equations? y=5/6x+1 −x+y=2 Enter your answer in the boxes.

    asked by Jay on February 11, 2017
  81. chemistry

    If 27.3 g of NaNO3 are needed, what volume of a 5.78 % w/v solution will provide this mass?

    asked by lisa on April 26, 2012
  82. chem(litmus)

    Is it wrong to put litmus paper directly in solution?

    asked by mary on September 30, 2009
  83. calculus

    Which of the following is NOT a solution to cos^2 x = 3sin^2 x? 30 60 150 210 330

    asked by philly on November 27, 2012
  84. Chemistry

    Calculate the concentrations of H3O+ and OH- ions in a 0.25 M HClO4 solution.

    asked by John on March 10, 2011
  85. math

    The graphs of ​ f(x)=−5/3x+9 ​ and ​ g(x)=2^x−1​ intersect at (3, 4) . What is the solution of −5/3x+9=2^x−1 ? Enter your answer in the box.

    asked by Jay on February 11, 2017
  86. chemistry

    The poH of a solution of 0.25mol/dm3 of Hcl acid is

    asked by peter onoriode on March 10, 2011
  87. Science

    Determine the molar concentration of Ca^2+ and Cl- in a .075 M CaCl2 solution

    asked by Moses on March 9, 2011
  88. science

    determine the molar concentration of Ca^2+ and Cl- in a .075 M CaCl2 solution

    asked by abby on March 9, 2011
  89. math

    (19) Does the following system of equations have a solution? If it does, find one; if not, explain why not. √ x + √ y = 1 r 4x 9 − r 25y 64 = 1

    asked by sukh on February 12, 2017
  90. chem

    How would you prepare 100 mL of a 0.01N sulfuric acid solution?

    asked by Anonymous on March 7, 2014
  91. 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
  92. analytical chemisty

    Calculate the pH and pOH of a 0.00002M solution of acetic acid.

    asked by mary on September 23, 2012
  93. chemistry

    What is the final volume V2 in milliliters when 0.600 L of a 40.9 % (m/v) solution is diluted to 20.1 % (m/v)?

    asked by Anonymous on April 25, 2012
  94. chemistry

    How many moles of glucose would be present in: 1Litre of a 5micromolar solution?

    asked by Christina on December 3, 2012
  95. Chemistry

    which must be a mixture of substances? 1. solid 2. liquid 3. gas 4. solution

    asked by John on November 6, 2007
  96. chemistry

    If you dissolve 5.0g of NaCl in 3.0 liters of water, what is the concentration of the solution?

    asked by Juliettte on March 5, 2011
  97. chemistry

    20 g of sugar are dissolved in 1 L of water. Calculate the concentration of this solution.

    asked by Sarah on August 28, 2011
  98. trig

    Complete the general solution to y = arcsin -. y=____±2k IM lost please help

    asked by tracy on March 24, 2010
  99. chemistry

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

    asked by Wina on March 5, 2011
  100. math

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

    asked by sabrina on April 19, 2014