1. Chemistry

    how many grams of potassium dichromate are needed to make 250 mL of a 0.75 molar solution?

    asked by Bobbi on March 3, 2011
  2. chemistry

    Determine the volume of a 0.550M of kmno4 solution required to completely react with 2.70 of zn

    asked by ain on February 16, 2012
  3. chemistry

    In an electrolytic solution the density of CuSO4 decreases or increases or remains constant?

    asked by prashant on September 12, 2016
  4. chemistry

    What formula do I use to figure how many mL of 6.00 M of HCl must be diluted to make 600 mL of a 0.500 M solution?

    asked by Norma on July 25, 2010
  5. Chemistry

    How many grams of ethylene glycol, HOCH2CH2OH, are present in 5.3 gallons of a 5.22 m solution with a density of 1.83 g/mL?

    asked by teena on May 9, 2011
  6. HELP

    Can a solution of CrCl3 be stored in an aluminum container? I did the math part- E= 2.45 (approx)

    asked by scilover on May 9, 2013
  7. Chem-mystery

    Determine the PH of a solution that results from mixing 50 ml of .200 M hydroazoic acid, HN3 with 50 ml of CA(OH)2

    asked by Molly on March 2, 2015
  8. Math

    What are the restrictions on x if the solution to the equation -4 - square root 4-x=6 involves real numbers?

    asked by Alex on October 10, 2014
  9. chemistry

    Calculate the normal freezing point of an aqueous solution containing 30% w/w ethylene glycol. Thanks

    asked by el on October 26, 2011
  10. Chemistry

    Calculate volume of 6MHCL required to prepare a 250 ml of a 0.15MHCL solution??

    asked by Karen on April 9, 2013
  11. New delhi

    Find molarity of 20%aqous soluion of amino . the density of the solution is 1.4 grams/ml

    asked by Tk on July 21, 2015
  12. chemistry

    how would you prepare 1.00 L of a .50M solution of H2SO4 from concentrated (18M) sulfric acid?

    asked by kelly on August 24, 2010
  13. Analytical Chemistry

    How many mg of X is contained in 25 ml of a solution giving an absorbance of 0.250 at 400 nm when measured with a 1 cm cell ?

    asked by AREEJ on November 30, 2012
  14. Chimestry

    How many moles of HNO(3) are present if 4.20*10^-2 mol of Ba(OH)(2) was needed to neutralize the acid solution?

    asked by Carmen on December 3, 2011
  15. Chemistry

    What would be the molarity of a solution made by dissolving 126g K3PO4 into 1500 mL of water?

    asked by Teresa on November 8, 2014
  16. Density of a CUSO4 solution

    I need to determine the density of a CUSO4 solution of 1% concentration from a 10cc pipette volume.

    asked by Lorraine on March 6, 2011
  17. Chemistry

    What would happen to the color of a dilute solution containing FeCL4 if you added concentrated HCl?

    asked by Christina on April 26, 2010
  18. Chemistry

    What mass of sucrose, C12H22O11, is needed to make 500mL of a 0.20M solution? Help please... Thanks.

    asked by Lucy on November 18, 2007
  19. Analytical Chemistry

    How many mg of X is contained in 25 ml of a solution giving an absorbance of 0.250 at 400 nm when measured with a 1 cm cell ?

    asked by AREEJ on November 30, 2012
  20. Chemistry

    What is the pH of a solution if two aspirin each containing 500mg of acetylsalicyclic acid were dissolved in 325 ml of water?

    asked by Clarissa on December 8, 2010
  21. Science

    1. We dissolve 0.005 mole of strontium chromate in 1 L of solution at 25°C. Will a precipitate be formed?

    asked by Rachel on December 8, 2015
  22. sciences

    A solution contains 0.0180 M HNO3, 0.0268 M HI, and 0.250 M formic acid, HCOOH. What is the pH?

    asked by carl on March 4, 2013
  23. chemistry

    describe how you prepare a 250cm3 of 0.5M solution Na2C03.indicate the variouse laboratory apparatus you will use

    asked by Dorcas on February 8, 2017
  24. chemistry

    Calculate the molar concentration of OH− ions in an 1.79 M solution of hypobromite ion (BrO−; Kb = 4.0 10-6).

    asked by sara on March 4, 2013
  25. chemistry

    How many grams of rubidium chloride are present in 125.0 mL of a 1.75M RbCl solution?

    asked by Chris on February 7, 2013
  26. chemistry

    how is the endpoint estimated using potentiometric if no chemical indicator is added to the analyte solution?

    asked by e on March 3, 2008
  27. chemistry

    What is the volume in liters of a 0.760M K3PO4 solution containing 220.9g of potassium phosphate?

    asked by Chris on February 7, 2013
  28. Chemistry

    how do you calculate the pOH of a 0.25M solution of monochloroacetic acetic acid at 25C

    asked by Illyana on May 11, 2011
  29. bio

    what will happen to a red blood cell place in a solution of 99.3% water and 0.7% salt?

    asked by alex on October 26, 2011
  30. stoichiometry problems

    How many grams of NaCl with a molar mass of 58.44 would be needed to make 2.5 L of 0.00500 solution?

    asked by Cindy on November 23, 2008
  31. chemistry

    What is the concentraton of a solution made by dissolving 0.5 moles of solute in 9.0 liters of water?

    asked by Juliettte on March 5, 2011
  32. AP Chemistry

    what are the procedures and materials needed to make a 0.10m solution of Silver(I) Chloride?

    asked by meghan on March 22, 2011
  33. Chemistry

    Why is the solubility of KHTar greater in a 0.10M NaNO3 solution than in distilled water?

    asked by Becky on July 14, 2011
  34. Chemistry

    What is the concentration of H3O+ in a solution with the following pH values. Enter your answer in scientific notation. a. 6.66 b. 13.40 c. 13.17 d. 2.39

    asked by chelsey on March 18, 2014
  35. college chemistry

    how many grams of copper can be reduced by applying a 3.00 A current for 16.2 minutes, to a solution containing Cu^(2+) ions?

    asked by Anonymous on May 20, 2015
  36. Linear Algebra

    I previously posted this question under the wrong topic. Which of the following choices is a solution for: (-3-i)x1 + (1-2i)x2 = 0 (-7-9i)x1 + (7-4i)x2 = 0 for any value of the variable t [x1] = ? [x2] A: [5] [1+7i] * t B: [5] [1-7i] * t C: [5] [-1-7i] * t

    asked by Michael on December 4, 2009
  37. chemistry

    calculate the mass of sodium hydroxide needed to prepare 500 mL of a 0.10 M solution.

    asked by Rebecca on October 14, 2007
  38. Chemistry

    What mass of NaOH is required to prepare 500.0 mL of 0.1029 M stock solution?

    asked by Erin on October 9, 2012
  39. Science

    Determine the pH of a 0.62M NH4NO3 solution at 25oC. The Kb for NH3 is 1.76x10-5. Calculate Ka

    asked by Manushi on December 27, 2016
  40. Chemistry

    The amount of oxalic acid (equ.wt.63) required to prepare 500ml of its 0.10 N solution is

    asked by Ammu on July 17, 2019
  41. Chemistry

    10.0 g of H2SO4 are added to 50. 0 mL of water. Is the answer 200. If not how do you approach the problem to get the solution.

    asked by George on September 6, 2008
  42. Chemistry

    What is the molarity of 782 mL of a solution that contains 0.056 mol of solute? Answer in units of M

    asked by Anonymous on September 15, 2011
  43. Chemistry

    What is the concentration of a solution made by diluting 95 mL of 6.0 M HCl to a final volume of 750 mL

    asked by Tish on October 14, 2012
  44. Chemistry

    How many grams of K2Cr2O7 (Potassium dichromate) must be used to make 250 ml of a0.125 M solution?

    asked by Bob on December 8, 2013
  45. chemistry

    Calculate the number of moles of each ion in 10.5 mL of 0.205 M cadmium phosphate solution.

    asked by diana on January 22, 2012
  46. Chemistry

    6. Explain how you would prepare this solution from powdered reagents and whatever glassware you needed: 3.0 L of 1.3 M NaOH

    asked by Gregory on November 27, 2013
  47. chem 12

    Calculate [H3O] an [OH] for a sodium hydroxide solution having a pH of 12.5. I know this is a strong base, and i got the pH 12.5. But i don't know how to go from there.

    asked by Sarah on October 11, 2011
  48. biology/chem

    How many grams of glucose (MW = 180 g) should we dissolve in one liter of water to get 1 molar solution?

    asked by nicole on January 19, 2011
  49. chemistry

    Calculate the number of moles of each ion in 10.5 mL of 0.205 M cadmium phosphate solution.

    asked by student on January 22, 2012
  50. Chemistry

    What is the molarity of a solution that results when 3.64 g KCl is dissolved in water and diluted to exactly 200.0 mL?

    asked by Van on February 27, 2016
  51. chemistry

    What is the titer of the iodine solution of the .1000g sample of pure ascorbic acid 25.32 ml I2

    asked by saddee on April 28, 2009
  52. chemisty

    A bottle labeled 0.150Msulfuric acid contains a solution with what concentration in sulfate ions?

    asked by sarah on September 27, 2010
  53. Chemistry

    Calculate the mass of HF required to prepare 200 mL of 0.25 mol/L solution. P = 40%; d = 1.14 g/cm3

    asked by Jacke on June 21, 2016
  54. Chemistry

    What is the pH of a .0035 M Ba(OH)2 solution. I did -log(.0070) to find pOH So 14-2.15=11.85 pH? Just want to double check.

    asked by Sarah on March 22, 2013
  55. Chemistry

    State two techniques that can be used to recover crystals of sodium trioxonitrate (v) from its saturated solution

    asked by Lawal afiz on September 23, 2018
  56. chemistry

    If you begin with 0.030 L of a 2.5M NaOH solution, what concentration will you end up with if you dilute it to 0.050?

    asked by Anonymous on February 22, 2016
  57. Chemistry

    What will be the molarity of the resultant solution obtained by mixing equal volumes of 1M and 5M ofNaOH.

    asked by Shivani on September 10, 2017
  58. Chemistry

    What is the pH of a one liter auqueous solution to which has been added 0.2 moles of acetic acid (CH3COOH)?

    asked by Chris on January 23, 2011
  59. Chemistry

    What volume of 0.200 N H2SO4 is required to neutralize a solution containing 8.00 equivalents of NaOH?

    asked by Joe on November 10, 2010
  60. chemistry

    What is the volume of solvent needed for the preparation of an equal 10% title solution when using 15 mL of solute?

    asked by wallace on August 17, 2018
  61. Chemistry

    What volume of a 0.600 M solution of AgClO4 is needed to produce 160g of AgCr04?

    asked by Tara on September 27, 2010
  62. Chemistry

    Calculate the pH of a buffer solution containing 1.0 M ammonia (NH3 ; Kb = 1.8 x 10-5) and 1.0 M ammonium chloride (NH4Cl).

    asked by Nick on March 20, 2013
  63. College Chemistry

    Balance this equations for redox reactions in basic solution. Fe(OH)3(s) + OCl- ¨ FeO42- + Cl-

    asked by Marissa on September 23, 2010
  64. Chemistry lab

    What mass of NaOH is required to prepare 500.0 mL of 0.1029 M stock solution?

    asked by Donnie on October 9, 2012
  65. Chemistry

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

    asked by Anonymous on May 18, 2010
  66. Chem

    What are the major species in solution during the titration of citric acid with a strong base?

    asked by Lyn on November 20, 2016
  67. chem

    The ion product Of D2O is 1.35x 10^-15 at 25 degrees C. For a solution to be acidic the PDF must be what?

    asked by court on April 22, 2012
  68. college chemistry

    I was wonder what bromine/glacial acetic acid solution is used for during the bromination of acetanilide reaction

    asked by Anonymous on July 17, 2013
  69. chemistry

    How many grams of potassium permangate are needed to decolorized 1g of 2-pentene in basic solution

    asked by john on October 4, 2011
  70. chemistry

    What volume of 0.900 M HCl is required to complete neutralize 50.0 ml of a 0.500 M Ba(OH)2 solution?

    asked by Subiza on December 11, 2016
  71. College 103 Chem

    How many grams of Sodium Phosphate would you need to make 225ml of 8.00M of stock solution? Thank you

    asked by Andrew on July 10, 2013
  72. Algebra 1 (Reiny or Kuai)

    Can a solution of a linear inequality lie on a dashed boundary line? Explain.

    asked by Anonymous on December 19, 2013
  73. Algebra

    Determine whether x > - 4 is a solution of the inequality. I really can't figure this out. Please help! Thank you again. You people are wonderful. Thank you for your time and genorosity.

    asked by Esther on January 3, 2011
  74. Chemistry

    To make a 5.0L solution that is 38.8% NaCl by weight in water. How much salt should you add to the 5.0L to prepare?

    asked by Anita on September 12, 2017
  75. Chemistry

    How many mL of acetone are required to make a 8.42 % v/v aqueous solution in a 300 mL volumetric flask?

    asked by Hannah on November 12, 2016
  76. Chemistry

    What is the osmotic pressure in atmospheres of a 15%(m/v) sucrose solution at a temperature of 25 degrees celcius

    asked by Ruffles on December 4, 2013
  77. chemistry

    what volume of .0250 M MgCl2 should be diluted to 250.0 mL to obtain a solution with [Cl]=.0135?

    asked by Shineylou on September 27, 2011
  78. chemistry

    Calculate the ionization constant, Ka, of phenol (HC6H5O), a weak acid, if a 0.25 M solution of it has a pH of 5.24.

    asked by Audrey on November 15, 2010
  79. CHEMISTRY

    Ignoring activities, determine the molar solubility (S) of Zn(CN)2 in a solution with a pH = 1.94. Ksp (Zn(CN)2) = 3.0 × 10-16; Ka (HCN) = 6.2 × 10-10.

    asked by Anonymous on June 3, 2015
  80. Chemistry

    In a titration of 35.00 mL of 0.737 M S, __________ mL of a 0.827 M KOH solution is required for neutralization.

    asked by Charlie on October 5, 2012
  81. chemistry

    Calculate the PH and POH of an aqueous solution that is 25.00% of HCL by mass and density of 1.35g/ml

    asked by okore on October 9, 2017
  82. Chemistry

    Calculate the pH of the solution that results from mixing 30.0 mL of 0.050 M HCN(aq) with 70.0 mL of 0.030 M NaCN.

    asked by Anonymous on March 19, 2014
  83. chem

    A solution that is formed by combining 600. mL of 0.20 M NaOH with 400. mL of 0.40 M HNO3 has an H+ concentration of

    asked by leona on June 19, 2010
  84. Science

    Determine the pH of a 0.62M NH4NO3 solution at 25oC. The Kb for NH3 is 1.76x10-5. Calculate Ka

    asked by Manushi on December 28, 2016
  85. Chemistry

    What if I have 50g water and I dissolve 5g of NaOH, will the solution have a total mass of 55g?

    asked by Lim on August 22, 2018
  86. 8th grade

    can u 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 don't think it is right..can u help also can you help me to do the factorization of 6x^2 - 2x -

    asked by JT on May 26, 2009
  87. math

    find missing coordinate of the order repair so it is a solution 2x+4y-6=0 (2, ) my answer was (2, 1/2) or (2,2/1) but it is incorrect

    asked by Felicia on July 1, 2016
  88. chemistry

    what is the molarity of 20 grams of HCI mixed with water to make 1 liter of solution

    asked by jhjmjj on June 7, 2010
  89. chemistry

    What is the carbonate-ion, CO3-2, concentration in a 0.037 M carbonic acid solution? a. 1.2 ´ 10-4 b. 4.2 ´ 10-7 c. 7.6 ´ 10-8 d. 4.8 ´ 10-11 e. 5.2 ´ 10-19

    asked by iby on May 14, 2010
  90. 10th chemistry

    what mass of sucrose, C12H22O11, is needed to make 300.0 mL of a .50M solution?

    asked by Kay on June 2, 2010
  91. Math

    A manchine prints 1500 newspaper in 45 minutes . How many will it print in 2 hours solution?

    asked by Sandhya Pandey on November 12, 2016
  92. chemistry

    Please help !? Knowing that the concentration of Ag+ in a silver chromate solution is 1.5 x 10-3 M, calculate its solubility product at 25°C.

    asked by ryan on February 2, 2015
  93. Chemistry

    Calculate the mass of Crystals that will form in 400g of water if the solution is cooled from 55°C to 15°C?

    asked by Shannah on August 17, 2017
  94. chemistry

    if an antacid tablet was dissolved in water would the solution become acid, base or neutral? why?

    asked by Anonymous on October 9, 2010
  95. Chemistry

    In a titration of 35.00 mL of 0.737 M S, __________ mL of a 0.827 M KOH solution is required for neutralization.

    asked by Charlie on October 5, 2012
  96. Chemistry

    What is the osmotic pressure in atmospheres of a 15% sucrose solution at a temperature of 25 degrees celcius

    asked by Ruffles on December 4, 2013
  97. Chemistry

    Is "a color of solution becoming less intense due to dilution" maybe evidence of chemical reaction or not?

    asked by Anonymous on November 21, 2016
  98. Chemistry

    OMG! HELP! 1. How many grams of CaCl2 would be required to produce a 3.5 M (molar) solution with a volume of 2.0 L?

    asked by Victoria on August 17, 2013
  99. Algebra 1

    Determine whether -4 is a solution to the inequality x > - 4 I apologize, I haven't slept all night doing my homework. Thank you so very much.

    asked by Esther on January 3, 2011
  100. chemistry

    Calculate the PH and POH of an aqueous solution that is 25.00% of HCL by mass and density of 1.35g/no

    asked by okore on October 9, 2017

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