1. 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
  2. science- chemistry

    what must be the concentration of Cl- to just start precipitation of CuCl from a solution which is 4.896x10^-6M in CuNO3? Ksp = 1.9x10^-7

    asked by pigglet on May 10, 2010
  3. Chemistry

    What is the molality of a solution composed of 11.1 g NaCl dissolved in 638 g of water? Answer in units of m.

    asked by Tony on March 2, 2011
  4. Chemistry 104

    Nitric acid, HNO3, is available commercially at a concentration of 16 M. What volume would you use to prepare 770 mL of a 0.19 M solution?

    asked by Brenna on November 11, 2010
  5. 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
  6. 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
  7. 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
  8. Chemistry

    Calculate the pH of a solution formed by mixing 124.8 mL of 0.481 M KF and 130.7 mL of 0.084 M HClO3.

    asked by Margaret on March 13, 2013
  9. 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
  10. algebra

    Can you help me to find the product of -4x^2 and x^3 + 2x^2 - 5x + 3... and the solution to the equation of x^2 + 30x = 1000...I came up with -20 and 50 but I think it is wrong also can you help me to do the factorization of 6x^2 - 2x -20....Thank You

    asked by JT on May 26, 2009
  11. 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
  12. chemistry

    How many grams of solid potassium hydroxide are needed to exactly neutralize 10.8 mL of a 1.25 M hydrobromic acid solution

    asked by Kaitlin on October 22, 2012
  13. 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
  14. 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
  15. math

    22_

    asked by janay1978 on June 9, 2009
  16. chemestry

    How many mL of a 0.217 M aqueous solution of ammonium fluoride, NH4F, must be taken to obtain 3.63 grams of the salt?

    asked by cristy on November 17, 2010
  17. 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
  18. Chemistry

    Determine the amount of potassium chloride in each of the following solutions: 22.2kg of a solution containing 17.2% KCl by mass.

    asked by Kelsey G on November 30, 2010
  19. Chemistry

    Determine the amount of potassium chloride in each of the following solutions: 44mg of a solution containing 15% KCl by mass.

    asked by Kelsey G on November 30, 2010
  20. chem

    What is the structure of the white precipitate that forms when actophenone is added to a solution of phenylmagnesium bromide?

    asked by yen on March 7, 2009
  21. Chemistry

    What does 0.053 M NaCl mean? How many grams of sodium chloride are needed to make 5.0 liters of this solution?

    asked by Anonymous on November 29, 2014
  22. Chemistry

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

    asked by Gweedo on June 9, 2009
  23. Differential Calculus

    Given that p=(2q^2-5)^2. when q=3, it is increased by 0.7%. find the appropriate percentage in p. solution dp = 2(2q^2-5) (2dq) dp = (4x(18-5)(0.7%) dp = 4(13)(0.7%) am lost from here is dp=52x0.7/100= 0.364%

    asked by matrix school 2 on August 14, 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

    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
  26. Chemistry

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

    asked by Danny on April 13, 2010
  27. physical sciences

    with the use of calculations explain how would you prepare a 250ml of 0,2dm³ concentration solution of oxalic acid

    asked by Dan'sile on June 5, 2019
  28. 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
  29. Chemistry

    What must be the concentration of F- to just start precipitation of SrF2 from a solution which is 1.202*10-5M i Sr(NO3)2? Ksp = 2.900*10-9

    asked by Jude on April 17, 2011
  30. 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
  31. 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
  32. 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
  33. 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
  34. University of Liberia Chemistry 102

    Using a current of 4.75A how many minutes does it takes to plate onto a sculpture 1.50g of CuSO4 solution?

    asked by James on June 29, 2016
  35. 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
  36. chemistry

    How much water is neede to add to 60ml of 10% NaCl, density 1.05g/ml to obtain 4% solution

    asked by Anonymous on June 29, 2013
  37. 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
  38. Chemistry

    What formula do I use to calculate the mass of KCl that is required to make 625 mL of a 0.200 M solution?

    asked by Norma on July 25, 2010
  39. chemistry

    Calculate the amount of water (in grams) that must be added to 5.00 g urea in preparation of 16.2% by mass solution.

    asked by baizura on June 28, 2016
  40. chem

    What mass of NaCl is required to precipitate all the silver ions from 19.2 mL of 0.100 M AgNO3 solution?

    asked by Sara on March 19, 2011
  41. 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
  42. chemistry

    Calculate the amount of water (in grams) that must be added to 5.00 g urea in preparation of 16.2% by mass solution.

    asked by ain on June 28, 2016
  43. chm

    If 0.0490g of AgIO3 DISOLVES per liter of solution, calculate the solubility product constant.

    asked by ami on June 27, 2010
  44. Chemistry

    What is the total vapor pressure of NaCl solution at 25C with mole fraction of 0.01? (X_NaCl = 0.01) Thanks!!

    asked by Andrew on February 9, 2009
  45. science

    number of grams of MgCl2 needed to prepare a 250ml of a 12% aqueous solution with 1.1g/ml density

    asked by keith on June 28, 2016
  46. Chemistry

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

    asked by Diwaker on July 25, 2016
  47. 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
  48. 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
  49. Science

    What is the concentration off alcohol solution that was prepared by dissolving 40cm3 ethanol in 160cm3 water

    asked by Anonymous on July 26, 2016
  50. AP CHEMISTRY

    What would be the pH of a solution prepared by combining equal quantities of NaH2PO4 and Na2HPO4? Explain with an equation.

    asked by ERAGON on February 15, 2012
  51. Math

    What the base b1 of an Isosceles trapezoid if b2=57ft,h=17ft6inches and both legs are 23ft? or the formula for the solution?thank you.

    asked by Jason on November 18, 2011
  52. 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
  53. Genral chemistry

    if you dissolve 1.60g of Cu(No3)2 in 100mL of water, calculate the molarity of the resulting solution ?

    asked by Abdul on March 30, 2011
  54. chemistry

    Name the product obtained on passing carbon iv oxide into saturated sodium trioxocarbonate (iv) solution

    asked by Tobasco on May 21, 2016
  55. chemistry

    what is the molarity of 40g in 0.5L of solution. Molecular weight of substance is 100.09g/mole.

    asked by carla on March 10, 2011
  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. CHEM redox equations help!

    MnO4 ^- + C2O2 ^2- = MnO2 + CO3 ^2- how would you balance this in basic solution? I keep getting the wrong answer.

    asked by lily on October 22, 2015
  58. Chemistry

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

    asked by Janey on May 10, 2011
  59. 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
  60. Chemistry

    How many grams of lithium fluoride must be added to 3.5 kg of water to make a solution with a molality of 2.0 molal?

    asked by Anonymous on May 3, 2014
  61. 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
  62. 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
  63. Chemistry

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

    asked by JRoussel on May 10, 2011
  64. gen chem

    what must be the current in amperes to plate out 7.437g of Al from am aqueous solution of Al3+ in 5.4x10^2 minutes?

    asked by Chem on May 8, 2010
  65. chem

    calculate the molality of a solution that has 1.02kg sucrose (C12H22O11), dissolved in 554g water.

    asked by julia on October 27, 2010
  66. Biochemistry

    Calculate the mass (in g) of solid potassium hydroxide required to prepare: a) 1.75 litres of a solution with pH 11.5

    asked by Sarah on August 3, 2016
  67. Chemistry

    What is the mass of a solution that has a volume of 0.100L and a density of 1.07g/ml. Find in grams and In kilograms.

    asked by Deb on February 12, 2012
  68. Math

    Please help, I need to write down the complete solution for the equation x^2 -3x+0 So far I have added 3x to both sides giving x^2 =3x Now I am a little stuck! Any help would be very much appreciated

    asked by Sam on May 12, 2010
  69. Chemistry

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

    asked by Sylvia on June 28, 2017
  70. trig

    find, to the nearest degree, the solution set of 4 cos^2x-1=0 in the intervak between )degrees and 360degrees.

    asked by Courtney on May 12, 2010
  71. Chemistry

    A solution contains 80.0 g of sodium chloride and 400.0 g of water. Calculate the NaCl as a mass percentage

    asked by Monica on June 2, 2013
  72. Chemistry

    Define in outline a suitable procedure for preparing a saturated solution of sodiumtrioxonitrate(v) at 50degreecelsius

    asked by Chibuike on June 30, 2019
  73. Chemistry

    What is the molar concentration (M= molarity) of a solution prepared by dissolving 50 g of NaCl in 750ml of water?

    asked by Nene on February 19, 2012
  74. Math - derivatives of cos and sin fucntions

    a) Find an equation of a line that is tangent to y=2sinx and whose slope is a maximum value. b) Is there more than one solution? Explain.

    asked by Farah on November 6, 2010
  75. chemistry

    calculate the percent composition or w/v% of 3x10 to the 2nd power mL solution containing 15g of glucose

    asked by Quentin on May 4, 2010
  76. 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
  77. science

    a solution that is composed of 5g of salt for every 95g of water produces by what percent concentration of mass?

    asked by frances on September 26, 2012
  78. 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
  79. Chemistry

    The solubility of calcium sulfate at 30 degrees C is .209 g/100mL solution. calculate its Ksp.

    asked by Al on November 29, 2010
  80. 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
  81. 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
  82. 5th grade

    Explain the type of solution formed when steam from boiling water evaporates into the air

    asked by Anonymous on November 10, 2010
  83. 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
  84. SUPER HARD CHEMISTRY

    a solution containing 100.0 mL of 0.135 M CH3COOH (ka=1.8E-5) is being titrated with 0.54 M NaOH. calculate the ph: at the equivalence point

    asked by jk on March 28, 2015
  85. 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
  86. Chemistry

    Determine the hydronium ion concentration in a solution that is 0.00042M HCL Answer in units of M.

    asked by Raven on May 8, 2017
  87. 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
  88. math

    Find the value of x,y and z that will make the fractions below equivalent 3/25, x/125, 39/y,z/625 Please guys can you help me with solution of this question

    asked by kevi on June 29, 2019
  89. 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
  90. 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
  91. science

    what can happen to unhomogenized milk if left to stand is this an example of a mechanical mexture, solution or suspension?

    asked by jenna on June 21, 2006
  92. chemistry

    Calculate the mass of kl in grams required to prepare 5.00x10power 2mL of 2.80M solution

    asked by lisa on March 11, 2011
  93. Chemistry

    Determine the freezing points of each 0.20m aqueous solution. a)K2SO4 b)CsNO3 c)Al(NO3)3

    asked by Jack on April 29, 2010
  94. chemistry

    15.0 g of Potassium metal is dropped into 50.0 ml of a 1.50 mol/L solution of H2SO4. what is the mass of gas given off during the reaction?

    asked by k on May 12, 2010
  95. Chemistry

    Which substances are not ionized in a aqueous solution? Hi, KBr, H2SO4, HNO2, AgCl, Ca(NO3)2

    asked by Chelsea on October 19, 2015
  96. Chemistry ASAP

    what would be the concentration of chromate ion, CrO4^-2, in a saturated solution of CaCrO4. (Ksp= 7.1x10^-4)

    asked by Aimee on May 18, 2010
  97. science

    Refer to Equilibrium Constants. Calculate the pH of a solution resulting from the addition of 50.0 mL of 0.30 M HNO3 to 50.0 mL of 0.30 M NH3.

    asked by Addy on April 10, 2019
  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, stochiometry2

    The no. Of moles of KMnO4 that will be needed to react with one mole of sulphite ion in acidic solution is.......

    asked by Aman on September 5, 2013
  100. Biochemistry

    Which of the following is the correct pH of a 211.7 mL solution (final volume) of pure water after 52.3 mL of 1.00 mM HCl was added?

    asked by Rich on September 17, 2013

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