1. Chemisty- Please help!

    What mass of a 0.66 molality ammonium nitrate (80.04g/mol) solution will contain 0.15 mol of solute?

    asked by Kelly on July 9, 2013
  2. Chemistry

    Calculate the molality of ethanol in a solution of water, if the mole fraction of ethanol is 0.300.

    asked by DrChem on October 2, 2010
  3. science

    A substance is added to the solution of Barium sulphate,yellow precipitate is formed.What is that substance?

    asked by prabodh on March 13, 2013
  4. chemistry

    25 mL of standardized 0.45 mol/L NaOH is titrated with 21 mL of 0.35 mol/L acetic acid. Calculate the pH of the solution

    asked by unknown on April 9, 2008
  5. chemistry

    Calculate the amount concentration of the ammonium ion in 100.0 ml of a solution containing 14.4 g of ammonium carbonate.

    asked by Danneila on January 8, 2015
  6. Science

    How do external factors (such as stirring or shaking) determine whether a mixture will become a mechanical mixture or a solution?

    asked by Bill on February 27, 2018
  7. CHEMISTRY

    HOW TO PREPARE 1 M GUAICOL FROM LIQUID GUAICOL SOLUTION MOLECULAR WEIGHT 124.14 DENSITY 1.11

    asked by ROSHAN on November 27, 2016
  8. Chemistry

    How do I calculate the molality of a saturated solution of KCl at 70 degrees Celsius? I have gotten the moles of KCl (.66) but am not sure where to go from there.

    asked by Mathieu on May 10, 2015
  9. Chemistry

    calculate the the pH of a buffer solution containing 0.246 M NH3 and 0.0954 M NH4Cl (for NH3 Kb = 1.74x 10-5)

    asked by David on April 15, 2012
  10. chemistry

    If the water in 500mL of 0.44M NaCl solution is evaporated, what mass of NaCl will remain?

    asked by Justin on April 26, 2016
  11. Chemistry

    What is the boiling point (in °C) of a solution of 9.22 g of I2 in 66.5 g of toluene, assuming the I2 is nonvolatile? (For toluene, Tb = 110.63°C and Kb = 3.40°C·kg/mol.)

    asked by Sam on January 16, 2018
  12. Chemestry

    What is the van't Hoff factor for K2SO4 in an aqueous solution that is 5.00 % K2SO4 by mass and freezes at -1.21 ∘C?

    asked by Raquel on January 26, 2014
  13. Chemistry

    A sample of Hydrochloric Acid (HCl) has a concentration of 5.00 %(m/v). Determine the molar concentration of the solution.

    asked by Josh on May 23, 2012
  14. Maths 10th grade

    1-The roots of x2 - 6x + m - 3=0 are x1 and x2.If 2x1 - 3x2= 2 is given, find m? 2-Given the inequalities x-2 ______ < 0 and x2 - 4x - 5

    asked by Denise on March 4, 2012
  15. chemistry

    60 grams of ethyl alcohol, and 40 grams of H2O form a solution, what are the solute and the solvent

    asked by willie on July 13, 2011
  16. Chemistry

    How to calculate the molarity of phosphoric aci9d in a solution that is 84% by mass phosphoric acid and a density of 1.87 g/ml

    asked by Cee on February 12, 2012
  17. Chemistry

    Calculate the concentrations of H2SO3, H3O+, HSO3-, and SO32- in a 0.025 M H2SO3(aq) solution

    asked by chamy on April 4, 2012
  18. Chemistry

    60 grams of NaOH, a solid, will dissolve in 40 grams of H2O.what is the solute and solvent for this solution

    asked by willie on July 13, 2011
  19. Chemistry

    How many moles of NH3 must be added to 1.00 L of solution to dissolve 0.979 g of CuCO3? For CuCO3, Ksp = 2.3 × 10-10.

    asked by Jane on March 10, 2015
  20. Chemistry

    What is the molar mass of a solute if 62 g of the solute in 125 g of water produce a 5.3 molal solution?

    asked by Anna on May 10, 2010
  21. Algebra

    1. Riding the bus, Jasmine uses 2/3 of her money for bus fare. What is this number as a decimal - A. 0.3 - B. 0.6 - C. 1.5 2. What is the solution to 2 6/6 / 2/14 A. 7 B. 14 C. 20 D. 40

    asked by Ashlyn on February 27, 2019
  22. Chem

    How many moles of each ion are present, per liter, in a solution that is labeled “0.221 M CaCl2 ”? CaCl2  Ca +2 + 2 Cl-

    asked by Jerry on June 4, 2019
  23. Chemistry

    One liter of 70% alcohol is needed. How much 95% alcohol is required to make the 70% solution. And thank you for last question and any future ones.

    asked by Jessi on March 24, 2009
  24. General Science

    When I2 dissolves in methanol, CH3OH, what type of forces exist between I2 and CH3OH molecules in solution?

    asked by Jen on February 19, 2008
  25. chemistry

    A 0.010 M solution of a weak monoprotic acid is 3.0% dissociated. What is the equilibrium constant, Ka, for this acid?

    asked by darali on May 10, 2010
  26. Chemistry

    A solution of H2SO4 with a modal concentration 6.25m has a density of 1.300 g/ml. What is the molar concentration?

    asked by Josh on July 12, 2011
  27. chemistry

    What mass of NaHCO3 must be added to 100ml H2O to produce a solution with a pH of 10? K1(H2CO3)=4,6*10^-7 K2(H2CO3)=4,4*10^-11 -------- Help! Thank you

    asked by Sonia on January 7, 2016
  28. Chemistry

    A solution contain 25g of Na2Co3in750cm3 of aasolution. Calculate concentration in (1) g/dm3 (2) mol/dm3

    asked by Titration on October 16, 2018
  29. chm

    What is the pH of the solution obtained by mixing 30.00mL OF 0.250M HCL AND 30.00mL OF 0.125M NaOH?

    asked by ami on March 31, 2010
  30. AP Chemistry

    What volume of 6.48 M HNO3 is required to prepare 301 mL of a 1.2 M HNO3 solution? Answer in units of mL.

    asked by Anonymous on October 24, 2010
  31. chemistry

    What is the concentration of an HCl solution if 23.1 mL of HCl are needed to neutralize completely 35.0 mL of 0.101 M Ba(OH)2 I cannot get the right answer

    asked by corey on December 5, 2011
  32. chemistry

    what mass of copper is deposited from copper sulfate when a current of 0.22 A is passed through the solution for 15 minute

    asked by Jssica on January 21, 2017
  33. Inorganic Chemistry

    Can Cu2+ oxidize 1) SO2 2) C2O4(2-) Does this happens also when the solution is basic? Cu2+ + H2S ---> CuS + H2

    asked by Shenaya on June 14, 2017
  34. Chemistry

    Which of the following anions act as weak bases in solution? ClO4- ClO- C2H3O2- Cl- I think its ClO4- and Cl-

    asked by Anonymous on October 23, 2010
  35. Chemistry

    Citric acid is a triprotic acid with Ka values of 3.14, 5.95, and 6.39. Estimate the pH of a 0.15 M solution of a monosodium salt

    asked by lawerence on March 20, 2015
  36. chemistry

    what mass of NaOH would be dissolved in 1dm3 of water to obtain 0.5 moles of the NaOH solution

    asked by osah felix on November 3, 2009
  37. Chemistry

    Which of the following anions act as weak bases in solution? ClO4- ClO- C2H3O2- Cl- I think its ClO4- and Cl-

    asked by Anonymous on October 23, 2010
  38. chemistry

    calculate Cu2+ in a 0.15M CuSO2 (aq) solution that is also 6.5M in free NH3. Cu^2+(aq)+ 4NH3(aq) [Cu(NH3)4]^2+ kf=1.1*10^13

    asked by allyx3 on November 21, 2012
  39. Science

    If a blood cell is placed in distilled water, what would the water be decribed as? hypotonic or hypertonic solution?

    asked by Bree on January 3, 2011
  40. CHEM HELP...PLEASE!!

    A solution of volume 80.0 mL contains 16.0 mmol HCHO2 and 9.00 mmol NaCHO2. If 1.00 ml of 12 M HCl is added to this, what will be the resulting pH?

    asked by Kat on March 2, 2009
  41. Math

    How would you find the value of m in this problem? 4m + 2 = -2 + 4m Well, I brought the 2 over to the right side by subtracting. That left me with 4m = -4 + 4m. Then, I subtracted the 4m from the right and did to the other side to get 0 = -4. Is there no

    asked by Tomas on October 26, 2008
  42. chemistry

    A 116.9 g sample of nitric acid solution that is 70.0% HNO3 contains how many moles of HNO3? how did you get the answer

    asked by diana on December 5, 2011
  43. Chemistrhy 110

    How many grams of Na2CO3 must be dissolved in 3.75 L of aqueous solution to yield a molar concentration of 1.75 molar?

    asked by Maria on March 10, 2015
  44. chemistry

    What is the pH of a solution having a hydrogen ion concentration of 1x10^-5 M? Also the same question, but Hydroxide instead of hydrogen. thanks in advance!

    asked by sarah on May 9, 2012
  45. Chemistry

    The pH of a 0.010 M aqueous solution of a weak monoprotic acid, HX, is 4.5. What is the value of the acid ionization constant?

    asked by Anonymous on May 17, 2012
  46. science

    What is the boiling point of a solution of 0.150g of glycerol in 20g of water? What is the freezing point?

    asked by Absa on January 28, 2013
  47. Chemistry

    How many kg. of salt needed to be dissolve in 3 liters of water to prepare 80 percent salt solution?

    asked by Ivyl on August 1, 2011
  48. bio chemistry

    calculate the PH of each of the following buffers prepared by placing in 1.0 L of solution 0.10 mol NH3 and 0.10 mol of NH4CL

    asked by samar on March 2, 2012
  49. Chemistry

    Calculate the molality of HCl in an aqueous 12M HCl solution that has a density of 1.20g/mL

    asked by David on January 22, 2013
  50. Chemistry

    to make an acid buffer of pH 5, what will be the ratio of salt to acid in the solution. [Ka= 1.8x10^-5 mol.dm^3]

    asked by Novah on November 4, 2017
  51. chemistry

    what simple test would you use to identify the possible presence of HCl(aq)? What result do you expect if the solution is HCl(aq)?

    asked by Lili on October 16, 2008
  52. AP Chemistry

    What volume of 3.16 M HNO3 is required to prepare 524 mL of a 0.2 M HNO3 solution? Answer in units of mL.

    asked by Matt on September 19, 2012
  53. Chem-Molality

    What are the boiling point and freezing point of a 0.22 m solution of sucrose in ethanol? Can someone help me with this quickly? I'm SO confused~!

    asked by Hai on April 17, 2011
  54. CHEMISTRY

    A 116.9 g sample of nitric acid solution that is 70.0% HNO3 contains how many moles of HNO3? how did you get the answer

    asked by diana on December 5, 2011
  55. Chem 2

    Calculation in grams for a .100 M solution of NaC2H3O2 * 3H2O using a 100 mL volumetric flask?

    asked by Emily on March 27, 2012
  56. Chemistry

    A 349mL sample of 1.659 M HI is mixed with 511 mL sample of NaOH (which has a pH of 13.35). What is the pH of the resulting solution?

    asked by Kayla M on September 27, 2016
  57. Chemistry

    Calculate the pH during the titration of 40 ml of 0.1000 M HCl with 0.1000 M NaOH solution after the following additions of base: A.) 28.00 ML B.) 39.80 ML C.) 48.00 ML

    asked by Braden on November 17, 2015
  58. Chemistry

    A 0.25mol solution of CH3COOH is found to be 13% ionized.calculate the value of the acid equilibrum for the acid

    asked by Lukman on June 3, 2013
  59. Chemistry

    Calculate the relative concentrations of phenol (Ka = 1.05 x 10-10) and phenolate ion in a solution with 0.05 M total phenol (pH = 7.5). PLEASE HELP

    asked by Anonymous on May 6, 2019
  60. Chemistry

    Calculate the relative concentrations of phenol (Ka = 1.05 x 10-10) and phenolate ion in a solution with 0.05 M total phenol (pH = 7.5).

    asked by Anonymous on May 6, 2019
  61. CHEM-PLEASE HELP

    1- Calculate the equilibrium concentration for H+, HSO4- and SO4^2- , given a .150M H2SO4 solution. the Ka for HSO4- is 1.20*10^-2

    asked by JOJO on May 20, 2013
  62. physics

    please tell me f(x)=rho_1*g*A the solution of which question I cannot understand plz give the 3 to 4 words of question as a hint

    asked by faryia on May 3, 2013
  63. Chemistry

    Determine the fluoride ion concentration for a saturated solution of magnesium fluoride. (Ksp = 7.4E-11)

    asked by Anonymous on October 30, 2017
  64. math

    carrie says that one solution to y=3x-5 is (4,7).Describe two ways to check if her statement is true.use at least one way to check her answer.

    asked by josh on May 8, 2012
  65. Science

    What concentration of CH3NH3Br is necessary to prepare a pH = 10.00 buffer solution assuming the base concentration is 0.49 M (Kb for CH3NH2 = 4.4 x 10-4).

    asked by Yanis on May 1, 2013
  66. College Chemistry

    how would you prepare 175.0ml of .150 m agno3 solution starting with pure agno3

    asked by Anne on September 27, 2012
  67. chemistry

    Calculate the mass of HCl required to prepare 2.5 liters of a 0.08 molar solution of HCl.

    asked by alexandrea on May 3, 2012
  68. Chem

    1a) Calculate the molar concentration of the KIO3 solution provided. KIO3 2.15g/L we used 10 mL in the experiment.

    asked by Sherry on October 7, 2016
  69. CHEMISTRY

    CALCULATE THE CONCENTRATION OF HYDROXONIUM IONS AND NITRITE IONS IN A SOLUTION IN WHICH HNO2 OF 4.5% IONISED

    asked by ABENA on October 20, 2017
  70. science

    If 10gram of sugar is added to one third of 100 gram of 27%aqueous solution of sugar then concentration is..?

    asked by rajnish on October 26, 2015
  71. Chemistry

    when a soultion is red in color, does the solution absorb ot transmit red light strongly?

    asked by Sarah on November 14, 2007
  72. ALGEBRA

    What happens if you are checking a solution for the rational expression and find that it makes one of the denominators in the expression equal to zero?

    asked by GGIFT on March 17, 2010
  73. chemistry

    Calculate the freezing point of a water solution at each concentration. 1.40m? What are the steps to calculate this?

    asked by Luis on November 19, 2014
  74. chemistry

    4.The Kb of ammonia, NH3, is 1.8x10^-5. What is the pH of a 2.000 millimolar solution of ammonia , to 3 significant digits.

    asked by Samantha on July 6, 2010
  75. Chemistry

    The Ka of a monoprotic weak acid is 3.39 × 10-3. What is the percent ionization of a 0.125 M solution of this acid? I just do not know where to even start...

    asked by amanda1012 on September 29, 2012
  76. KSU

    Suppose you are to prepare 1 liter of 70% ethyl alcohol.What is the ratio needed to prepare the solution?

    asked by jamely balaybay on July 17, 2017
  77. chem

    you need to make .80 M solution of NiSO4 (aq). How many grams of NiSO4 * 6H2O should you put into a .50 L volumetric flask?

    asked by help on December 12, 2011
  78. Chemistry

    How many grams of Ba(OH)2 must be added to 2.37L of water to make a saturated solution? I got 2.03 grams. Is this correct?

    asked by Tyler on July 17, 2011
  79. math

    simplify the expression 4(7-2q) +9q Jose if I am not mistake the solution to your question is 4(7-2q) +9q 28 - 8q +9q 28 + q Jose, Mary is correct.

    asked by jose on February 27, 2007
  80. Biology

    a cell is placed in distilled water and then transferred to a 5% salt solution. aw a result of this procedure, the cell would be likely yo?

    asked by Choi on June 2, 2011
  81. chemistry

    A current of 5A was passed through a solution of nickel (1)(1))salt.find the time taken for 6g of nickel to be deposited

    asked by dele Japhet on January 13, 2016
  82. Chemistry

    Calculate the molar solubility of BaSO4 in a solution in which [H3O+] is 3.5 M. Ksp(BaSO4) = 1.1 x 10^-10, Ka(HSO4)=1.02 x 10^-2

    asked by shawn on May 31, 2018
  83. Chem

    What concentration of CH3NH3Br is necessary to prepare a pH = 10.00 buffer solution assuming the base concentration is 0.49 M (Kb for CH3NH2 = 4.4 x 10-4). In M

    asked by Yanis on May 1, 2013
  84. Chemistry

    How would the absorbance of the standard solution have been affected if 0.00050 M NaSCN had been used in place of 0.00040 M NaSCN?

    asked by Kirsten on March 10, 2011
  85. Chemistry

    What is the final concentration of Sucrose if 150 ml of a 1.2 M solution of Sucrose is diluted to a total volume of 0.60 L?

    asked by Marilyn on November 3, 2012
  86. Chemistry

    The pOH of an aqueous solution at 25°C was found to be 2.30. The pH is 11.7. What is the concentration of the hydronium ion and the hydroxide ion?

    asked by Anonymous on October 25, 2017
  87. Math

    Choose the correct solution and graph for the inequality -4 x ≤ -12 x ≥ 3 x ≤ 3 x ≥ 8**** x ›-8 what are all the subsets of the set {-8 4} 0 (with slash) {-8}, {4}**** {-8}, {4},{-8,4} {-8},{4} 0 with slash, {-8},{4},{-8,4} Thank you

    asked by BUBBLES on October 19, 2015
  88. Chemistry

    The molar solubility of silver iodide in a 0.186 M potassium iodide solution is __________ M.

    asked by Kat on May 27, 2016
  89. Chemistry

    0.1 mol NaCl + 0.1 mol KCl would produce a buffer solution if dissolved in water?

    asked by Michele on May 4, 2010
  90. chemistry

    If 50g NaNO(3) is added to 100g water at 10 degrees C, how much more must be added to saturate the solution?

    asked by Monica on October 28, 2008
  91. CHEM 112

    A buffer solution is 1.40 M in NH3 and 1.00 M in NH4Cl. If 0.100 moles of NaOH are added to 1.00 L of the buffer, what is its pH?

    asked by Haley on October 6, 2011
  92. chem

    If a neutral solution of water, with pH = 7.00, is heated to 50 deg C , the pH drops to 6.63. Does this mean that the concentration of [H+] is greater than the concentration [OH-]of ?

    asked by greeny on July 2, 2012
  93. CHEM 112

    A buffer solution is 1.40 M in NH3 and 1.00 M in NH4Cl. If 0.100 moles of NaOH are added to 1.00 L of the buffer, what is its pH?

    asked by Haley on October 6, 2011
  94. Chemistry

    The equilibrium concentration of phosphate ion in a saturated chromium(III) phosphate solution is

    asked by Jame on May 31, 2017
  95. Basic Chemistry

    The density of a 40.0% by weight aqueous solution of NaOH is 1.432 g/cm3 what is the molarity of NaOH?

    asked by Alice on March 21, 2012
  96. chemistry

    A patient received 2.0 g of NaCl in 8 hours. How many milliliters of a 0.40% (m/v) NaCl (saline) solution were delivered?

    asked by brea on May 30, 2018
  97. Chemistry

    The density of a 40.0% by weight aqueous solution of NaOH is 1.432 g/cm3 what is the molarity of NaOH?

    asked by Kailey on March 21, 2012
  98. Chemistry

    What mass of MgSO4 · 7 H2O is required to prepare 300 mL of a 0.511 M MgSO4 solution?

    asked by Bob Miller on August 22, 2011
  99. chemistry

    How many milliliters of 3.0 M hydrochloric acid are i required to prepare 500 milliliter of 1.0 M Hydrochloric solution

    asked by Dylan on March 15, 2011
  100. Chemistry

    A KCl solution containing 42g of KCl per 100.0 g of water is cooled from 60 C to 0 C . What will happen during cooling?

    asked by Johannie on September 20, 2010

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