1. chemistry

    if a solution contains 255mL of ethanol and 375 mL ofwater, what is the percent of ethanol in the soution

    asked by mike on June 10, 2012
  2. Chemistry

    calulate the molality of solution that contains 51.2g C10H10 in 500mL of CCl4. the density of CCl4 is 1.6g/mL

    asked by EM-EM on November 14, 2012
  3. chemistry

    What mass of KNO3 in grams would be required to prepare 0.6 liters of a 1.8 M KNO3 solution?

    asked by Megan on November 29, 2011
  4. chemistry

    which solution has the highest concentration of hydroxide ions? a ph=7.93 b ph=12.59 c ph=7.00 d ph=9.82 e ph=3.21 i know the answer is 7 but why is it seven? would it be different if it said hydronium ions?

    asked by jessie on December 11, 2010
  5. chemistry

    You have 333 mL of alkaline solution at pH = 11.1. You wish to neutralize this by reacting it with 222 mL of acid. What must be the value of the pH of the acid?

    asked by barco on May 31, 2013
  6. chemistry

    What is the percent by mass of NaHCO3 in a solution containing 60 g of NaHCO3 dissolved in 500 mL of H2O

    asked by brooke on March 23, 2011
  7. Chemistry

    Okay, so how would i work out: How would you prepare 1.00 L of a .5M Solution of NiCl2 from the salt NiCl2 x 6H2O, Because what im doing is not working. :/

    asked by Kenz on February 5, 2012
  8. chemistry

    how much NaOH (in grams)do you need to weigh ouMt to make 250ml of a 0.5M naoh solution.... i got 5.0g is this right?

    asked by aaa on February 5, 2012
  9. math

    Which quadrant does the solution of the system fail? x+y=4 2x-y=2 Please help I don't know what to do. I don't what the answer, just want to be guided to it! Thank you (:

    asked by Country_cutie XD on December 17, 2013
  10. Math

    For this inequality 3x^(2) - 2x -1 > or equal 0 I get x=1 , x=-1/3 would the solution set become {x|1 < x < -1/3} I wasn't sure about the sign, if it should be greater than or equal to .

    asked by Amy~ on September 28, 2010
  11. chamistry

    how do you calculate the mole fraction of HCl in an acqueous solution that contains 33.6% HCl by mass?

    asked by franco on February 23, 2011
  12. Chemistry

    How many grams of AgNO3 (silver nitrate) are contained in 425 mL of a .15 M solution of AgNO3?

    asked by Jessica on January 29, 2013
  13. pre calc

    Solve the lograthmic function: ln(X+5) = ln(X-1) - ln(X+1) The answer has no solution but I do not know how to come to that answer. Help is greatly appreciated!

    asked by Laura Grace on March 23, 2011
  14. chemistry

    a bottle of 12.o M HCL has only 49.8 ml left in it. What is the molarity of the hcl if the solution is diluted to 350ml.

    asked by wendy on October 14, 2011
  15. chemistry

    Why will a new nail react faster in copper sulfate solution than an old, rusty nail?

    asked by valentina on February 6, 2011
  16. Chemistry

    What is the pH of a solution prepared by mixing 500mL of 2.0M HCN (Ka= 4.9x10^-10) with 500mL of 1.0 M KOH?

    asked by George on March 10, 2015
  17. math

    On a number line, the coordinate of A is -18 and that of B is 18. C is a point on AB such that AC:CB = 4:5. What is the coordinate of C? with solution pls... tnx...

    asked by HELP HELP HELP MNHS on January 30, 2013
  18. Math

    I have to solve the equation by finding the exact solution. Please Help. 1/4 log(x)-log(10000)=4

    asked by randall on October 30, 2011
  19. Chemistry Lab

    If 12.50 mL of 0.324 M HCl is diluted to 250.00 mL, what is the concentration of HCl in the final solution?

    asked by Thao on May 10, 2011
  20. General Chemistry

    What is the molality of KBr in a solution made by dissolving 2.21 g of KBr in 897g of water

    asked by Tyra on February 7, 2012
  21. Chemistry

    How do I prepare 80 mL of 0.10 M HC2H3O2 from a 6.0 M solution of Acetic acid? How do I prepare 80 mL of 0.10 M NH3 from 6.0 M ammonia?

    asked by knswimmerkat on February 24, 2011
  22. Chemistry

    What is the pH of a 0.94 M solution of HBrO that is also 0.59 M in magnesium hypobromite, the salt of it's conjugate base? The Ka for HBrO = 2.8 X 10-9.

    asked by Carl on February 23, 2011
  23. Chemistry

    How much water is needed to prepare 8M of NaOH solution with 1kg of NaOH pellets?

    asked by Chong Wee on February 26, 2014
  24. Chemistry

    How many moles of K2O are present in 40.0 mL of a 0.3 M K2O solution? I also need the formula, data, and answer.

    asked by Jaret on October 10, 2013
  25. chemistry (please help)

    How many liters of .0020 M iodine solution can be made from .050 moles of iodine (I2)?

    asked by Kellie on November 23, 2011
  26. Science

    How many grams of CH3SH must be added to water to prepare 410mL of a solution that is 2.5 M CH3SH?

    asked by Eli on November 4, 2014
  27. Chemistry

    How do I calculate the solubility of a compound in grams of solute per 100 grams of solution?

    asked by Matt on April 16, 2011
  28. Chemistry

    What is the molar concentration of nitrate ions in a 0.161M magnesium nitrate(aq) solution?

    asked by Amber on October 22, 2012
  29. Chemistry

    how many grams of sucrose are needed to make 100 ml of a 10^-2 Molarity sucrose solution?

    asked by Ty on August 28, 2011
  30. chemistry

    What is the original molarity of an aqueous solution of ammonia (NH3) whose pH is 11.10 at 25 degrees C? (Kb for NH3=1.8 x 10^-5)

    asked by Natalie on December 8, 2010
  31. chemistry

    How many moles of lilthium chloride are dissolved in 3.00 L of a 0.200 M solution of lithium chloride?

    asked by Tina on July 8, 2010
  32. chemistry

    how much NaOH would be needed to dissolve in H2Oto prepare 2.00L of a NaOH solution in which [OH-]=0.95 M?

    asked by lindsey on March 29, 2012
  33. Chemistry

    If you have 0.150 M HCl solution available, calculate the volume of HCl(aq) necessary for this reaction. _______ml

    asked by amber on June 24, 2014
  34. Chemistry

    Determine the mass (in grams) of a 1% solution of Manganese(II) Sulfate that will contain 0.0403 grams.

    asked by Bethany on February 1, 2015
  35. Chemistry Grade 12

    If the concentration of I^-1 is found to be 2.4 x 10^-3 mol/L in a saturated solution of PbI2. What is the Ksp of PbI2?

    asked by Kevin on July 28, 2016
  36. Math

    Help please on how to solve the following problem: If E,N,O,T, and W each represent a different integer, can you find more than one solution to this problem? Thanks in advance!

    asked by Dylan on November 13, 2007
  37. chemistry

    What is the pH of a solution that is .200M in acid and .500 m in the corresponding salt if the weak acid ka= 5.0x10^-7

    asked by Rae on September 2, 2010
  38. Chemistry

    19.2 mL H2SO4 solution (d = 1.727 g/mL, 80.0 percent H2SO4 by mass) ____ mol

    asked by Dewey on April 17, 2011
  39. algebra

    A 3 by 5 inch picture is put into frame with a mat that has width x. Draw picture inside the frame, write the expression of the width and length of the frame AND the picture together. If the total area of the frame with the picture is 35 in ^2, find the

    asked by Mark on March 30, 2016
  40. Math

    From an observation tower that overlooks a runway, the angles of depression of point A, on one side of the runway, and point B, on the opposite side of the runway are, 6 degrees and 13 degrees, respectively. The points and the tower are in the same

    asked by jasmine on July 21, 2013
  41. spanish

    A few months ago my teeth started hurting a lot. I went to the dentist's office to get them checked. When I arrived, the dentist told me that they were very crooked. He said he was going to give me some shots and then put braces on them. After everything

    asked by y912f on June 11, 2009
  42. math concepts

    Matthew sits at his desk unable to figure out the answer to a division problem. He reaches into his desk and pulls out a calculator. What is the correct response for Matthew's teacher to have? A. "Put that calculator away, you can't cheat on your work." B.

    asked by lauren on February 23, 2015
  43. Mathematics concepts

    Matthew sits at his desk unable to figure out the answer to a division problem. He reaches into his desk and pulls out a calculator. What is the correct response for Matthew's teacher to have? A. "Put that calculator away, you can't cheat on your work." B.

    asked by lauren on February 24, 2015
  44. science

    1)effects of impurities on the boiling point of an organic compound. 2) purposes why melting points are determined. 3)suppose i am taking a melting point and the compound disappears, what must i do? Have you put any thought into these or do you expect us

    asked by bugalo on August 15, 2007
  45. English 10

    1. Sensory language is also known as __________. syntax broadsides imagery irony 2.Which excerpt taken from the poem “Birmingham Sunday” by Richard Farina is an example of sensory language? A.“clouds they were grey” B.“She asked for a blessing"

    asked by Juliet Fonterhouse on November 18, 2014
  46. Science

    Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically

    asked by Unicorn on December 11, 2016
  47. Science

    Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically

    asked by Unicorn on December 10, 2016
  48. Quantatative Analysis

    "what volume of .50 m h2so4 must be added to 65 ml of .20 m h2so4 to give a final solution of .35 M? assume volumes are additive"

    asked by Stumped on October 29, 2011
  49. Science

    what is a the soild material in a solution called? It is called the solute; however, there are many solutions in which no solid is involved. Thank you for helping

    asked by Derek on January 16, 2007
  50. chemistry

    calculate the molecular weight of a substance which freezes forms a 7.00% by mass solution in water which freezes at -0.89°C.

    asked by iain on March 7, 2010
  51. precalculus

    When using Gaussian elimination to solve a system of linear equations, explain how you can recognize that the system has no solution.

    asked by Anonymous on November 30, 2016
  52. chemistry

    calculate the volume of 0.050 acetic acid needed to prepare 4.0 L of aceic acid solution with a PH of 3.80 L=

    asked by saud on December 2, 2011
  53. Chemistry(URGENT, PLEASE HELP!)

    the volume of alcohol present in 620 mL of a 40% (v/v) solution of alcohol is ______? A. 372 mL B. 40 mL C. 248 mL D. 580 mL

    asked by Kathie on May 4, 2010
  54. Chemistry (Concentratrion/molarity)

    A 25.00 mL aliquot of HCl of unknown concentration is titrated with 25.62 mL of 0.1011 M NaOH. What is the molarity of the HCl solution?

    asked by Ray on November 1, 2016
  55. math

    How many ways can 9 people be arranged to sit at a round table if Sam can not sit between Ron and Ed? My solution: 7! Thanks for your help.

    asked by Jenna on October 15, 2016
  56. chemistry

    The Measured voltage of the cell Pt H2 (1.0atm) H+ // Ag+ (1.0M) Ag ia 1.02 V at 25degrees. Gven E cell is 0.80V, calculate the pH of the solution.

    asked by Ali on November 2, 2009
  57. math

    Solution:if a car traveled 5 km/h.Faster it would take one hour less to travel210 kilometer.What is the speed of car and what time does it take?

    asked by Anonymous on December 3, 2011
  58. Chemistry

    If 0.250 L of aqueous solution with a density of 1.00 g/mL contains 13.7 g of pesticide, express the concentration of pesticide in (a) ppm and (b) ppb.

    asked by MONICA on September 15, 2016
  59. chemistry

    When KI is dissolved in water, the solution will be ___. a) Strongly Acidic b) Slightly Acidic c) Neutral d) Basic

    asked by Anonymous on July 19, 2010
  60. chemistry

    When KI is dissolved in water, the solution will be ___. a) Strongly Acidic b) Slightly Acidic c) Neutral d) Basic

    asked by Anonymous on July 19, 2010
  61. chemistry (solutions).

    how do you turn a saturated solution into an unsaturated one Add solvent. Some of the solute will dissolve in the added solvent.

    asked by lisa on February 26, 2007
  62. Chemistry

    What volume of 14.1M HBr is required to make 250mL of 1.25M HBr solution by dilution with water?

    asked by Kat on February 4, 2011
  63. ap chemistry

    use dimensional analysis to find how many moles of nitrate ions are in 40.0 mL of a 0.75 M aqueous solution of aluminum nitrate

    asked by anonymous on August 9, 2016
  64. trig

    Find all solutions in the interval [0,2π) for cos(x - π/6) = 1 + cos(x + π/6). Show work, please and state in solution set.

    asked by Jane on March 8, 2016
  65. lab

    i need 200mL of an 8 molar solution of dilute acid, and my stock cconcentrate is 18 molar, how much of the concentrate, and how much water will i need?

    asked by sue on January 31, 2011
  66. Chemistry

    What mass ( g ) of the solvent chloroform that should be added with 5287 mL of the solute hexane to produce a solution that is 7.11 m hexane.

    asked by Anonymous on March 2, 2010
  67. chemistry

    What would be the best technique to separate a soluble solid from a solution, like separating salt from a mixture of salt water?

    asked by Anonymous on August 19, 2011
  68. Finance

    what is the solution to bunyan lumber lumber 45-year harvest based on $300,000 contribution

    asked by sharon on December 19, 2011
  69. bio

    how many grams of sucrose would you need to prepare 10 mK of ,o1M solution of sucrose(FW+342g/mole)? show your work

    asked by milly on September 1, 2011
  70. chemistry

    If 5.6 grams of potassium hydroxide is added to enough water to make 950 ml of solution, what is the concentration of the potassium?

    asked by gary on June 1, 2014
  71. Chemistry

    If 56 mL of 1.93 M hydrochloric acid is mixed with water to create a solution with a concentration of 0.9 M , how many liters of water were added?

    asked by Mikay on May 31, 2014
  72. Chemistry

    If 0.08 mol of LiCl is added to a one liter solution that has dissolved 0.01 mol of PbCl2, will a precipitate occur?

    asked by Allie on March 4, 2014
  73. Chemistry

    A 0.5 molal urea solution causes freezing point depression of two degrees .what is the molal delression constant ????

    asked by Prithvi on May 2, 2014
  74. chemistry

    the molar solubility of PbS, in a 0.150 M ammonium sulfide (NH4)2S solution is? The Ksp for PbS= 3.2E-28.

    asked by Tara on December 15, 2010
  75. Chemistry

    How many grams of sulfur (S8) must be dissolved in 100.0 naphthalene (C10H8) to make a 0.13 solution? answer in grams.

    asked by Jeremy on February 3, 2012
  76. Chemistry

    How many grams of Calcium Nitride can be produced using the calcium contained in 100 ml of a 4 Molar beryllium solution?

    asked by momo on April 15, 2012
  77. math

    a chemist has 3 1/3 fluid ounces of a solution. how many containers can he fill if each container holds 5/12 fluid ounce

    asked by Anonymous on October 15, 2015
  78. chemistry

    Calculate the pH of a solution obtained dissolving 10 g of NH3 and 15 g of NH4Cl in 300 ml of water (Kb NH3 = 1.8 x10-5)

    asked by Anonymous on July 5, 2016
  79. chemistry

    a supersatured sugar solution (can/ cannot) be used in a calibration graph. What kind of graph, but probably not since you won't know the degree of supersaturation.

    asked by hawkstar on October 4, 2006
  80. BIO/CHIM

    How many grams of sucrose would you need to prepare 10 mL of .01M solution of sucrose(FW+342g/mole)? show your work

    asked by milly on September 1, 2011
  81. Chemistry

    What are the concentrations of HSO4- and SO42- for a 0.0050 M sulfuric acid solution? We are trying to find x but not sure how to find it on the calculator, please help!!!

    asked by Haley&Emily on February 21, 2014
  82. science 6th grade

    Statement: Most compounds that produce this in aqueous solution are ionic. Does this statement refer to an acid or a base or both?

    asked by Al on January 2, 2011
  83. CHEM 152

    Will a precipitate be observed if 0.10 mol Ag+ and 0.001 mol SO42- are added to make 1.0 L of solution? (Ksp = 1.4 x 10-5)

    asked by Car on June 27, 2010
  84. Science

    A solution containing 3.22g of solute in 40.0g of 1,4-dichlorobenzene and its freezing point is 49.2 C. Calculate the molar mass of the solute.

    asked by Nancy on May 30, 2015
  85. Math

    which ordered pair is the solution of the following system of equations? y=2x-3 x+y=3 1) (1,2) 2)(2,1) 3)(3,0) 4)(3,3) MY work: y=2x-3 x+(2x-3)=3 3x-3=3 +3 +3 3x/3=6/3 x=2 x+y=3 2+y=3 -2 -2 y=1 so I got (2,1) which would be answer 2 Is this correct? Thanks

    asked by B8 on January 10, 2014
  86. Algebra

    Write a direct variation equation that relates x to y. Then solve. Show both the equation and the solution. If y = 8 when x = 4, find y when x = 5.

    asked by joshua on January 5, 2011
  87. managerial economics

    given π=1000x - 2x - xy + 180y - 4y. subject to profit constraints x + y =30. using solution method, what is the optimal profit under contraint

    asked by yahaya on February 11, 2016
  88. Chemistry

    What concentration of chloride ion is required to precipitate 99.9% of the lead ion from a solution with [Pb^2+]= 0.045 mol/L ?

    asked by Tanner on March 4, 2012
  89. Chemistry

    How many milliliters of a 0.66 M HCl solution are needed to react completely with 1.9 g of zinc to form zinc(II) chloride?

    asked by Anon on October 4, 2011
  90. chemistry

    What is the molar concentration of sodium in a 200mL solution prepared from 1.359 grams of sodium phosphate?

    asked by Anonymous on October 6, 2009
  91. chemistry

    calculate the volume of 0.080 acetic acid needed to prepare 4.0 L of aceic acid solution with a PH of 4.00 L=

    asked by saud on December 3, 2011
  92. Analytical Chemistry

    how much volume of h2so4 is needed to produce a 0.953 Normality) of h2so4 if the 1 liter solution is 1.14 g/mL in density?

    asked by Sham on August 13, 2016
  93. Math- Algebra II

    Please check if I did this right... √(2x+1)+7= 3 -7 -7 √(2x+1)= -4 Square everything √(2x+1)^2= -4^2 2x+1=16 -1 -1 2x=15 divide by 2 on both sides x=7.5 CHECK: (Plug it in) √(2(7.5)+1)+7= 3 √(16)+7= 3 4+7=3 11 doesn't equal 3 so the answer is no

    asked by Lala on February 16, 2011
  94. chemistry

    calculate the grams of solute neede to prepare 24 grams of a 13.5% by mass scurose (c12h22o11) solution

    asked by jason on March 27, 2014
  95. chemistry

    a 500 ml portion of .0020 M Na2C2O4 solution is able to dissolve .47g of MgC2O4. What is the Ksp for MgC2O4

    asked by Raj on November 24, 2009
  96. Chemistyr

    Eighty grams of sodium nitrate dissolved in 50 grams of water will make what type of solution?

    asked by Kayla Johnson on March 28, 2012
  97. Chemistry

    How many milliliters of a stock solution of 2.00 M KNO3 would you need to prepare 250 mL of 0.150 M KNO3? Please show work.

    asked by MEGAN!!!! on April 30, 2010
  98. chemistry........help!! =)

    How many grams of FeSo4 are required to prepare 0.50 L of a 0.010 M FeSO4 solution? I don't need the answer just shown how to do it! thanks

    asked by Stacy on December 13, 2010
  99. chemistry

    What is the molarity of H3O+ in a 4.97×10-2 M NH4Cl solution that hydrolyzes according to the equation. NH4+(aq) + H2O(l) = H3O+(aq) + NH3(aq)

    asked by uci student on May 4, 2010
  100. Chemistry

    Calculate how many grams of FeSO4 . 7 H2O (MW = 278.02 g/mol) will be needed to prepare 1 mL of a 0.2 M FeSO4 solution? Am I right when I say we'd need

    asked by Feufolia on February 25, 2016