1. Chemistry

    To what volume should you dilute 124 mL of an 8.10 M CuCl2 solution so that 52.0 mL of the diluted solution contains 5.9 g CuCl2

    asked by jay on August 4, 2010
  2. chemistry

    4) An aqueous solution is 1.65 m glucose. What are the boiling point and freezing point of this solution?

    asked by Mike on October 15, 2012
  3. chemistry

    when 50 ml of an HNO3 solution is exactly neutralized by 150 ml of a 0.50 M solution of KOH, what s the concentration of HNO3

    asked by bee on May 17, 2011
  4. algebra

    How much water should be added to 20oz of a 15% solution of alcohol to dilute it to s 10% alcohol solution?

    asked by rhonda on February 24, 2012
  5. science

    a solution is 40% in NAOH. calculate the mole fraction of NAOH if it is an aqoues solution

    asked by Neeraj on April 5, 2012
  6. math

    how many liters of water must be added to 30 liters of a 20% alcohol solution to dilute it to a 15% solution?

    asked by Anonymous on April 6, 2010
  7. chemistry

    To what volume should you dilute 126 ml of an 7.90 M CuCl2 solution so that 49.5 ml of the diluted solution contains 5.9 g CuCl2?

    asked by anna on February 20, 2011
  8. chemistry

    what is the molarity of a HCl solution that contains 13.0 g of HCl in 125 mL of solution? Answer in units of M

    asked by please help ! on March 8, 2012
  9. Chemistry

    Prepare a 0.025M solution of Glucose by diluting a 1M Glucose solution. What and how much did you mix together?

    asked by Pam on October 27, 2011
  10. Chemistry

    A 35 mL solution of HCl, reacts completely with 20 mL of 0.25 M KBr. What is the molarity of the HCl solution?

    asked by Raj on September 23, 2007
  11. Chemestry

    IF 121ml of a 1.0 M glucose solution is diluted to 500.0 mL, what is the molarity of the diluted solution?

    asked by Earl on November 5, 2013
  12. chemistry

    How many gallons of distilled water must be mixed with 50 gallons of a 30% alchohol solution to get a 25% solution?

    asked by chelsea on September 6, 2008
  13. chemistry

    what is the new concentration of a NaOH solution that was made from 75 mL of a 5.5 M NaOH solution and diluted it to 250 mL?

    asked by lexi on June 2, 2011
  14. chemistry

    A solution contains 5.00% (by mass)NaCl. The density of the solution is 1.064 g/cm^3. What is the molarity of NaCl?

    asked by evelyn on November 19, 2012
  15. Chemistry

    1.2g of NaCl as used to prepare 200 ml solution , what is the molar concentration of NaCl in solution ?

    asked by Mariam on April 20, 2014
  16. chemistry

    If you have 137.8 mL of a 38.4% aqueous solution of ethanol, what volumes of ethanol and water are in the solution?

    asked by MaryBeth on November 4, 2010
  17. mes

    a solution of sugar in water is 5% by mass. how much sugar is present in 250 gm. of solution?

    asked by dona on June 25, 2011
  18. Linear Algebra

    Consider the system x-2y=k-1 4x+(1-k^2)y=8 For what values of k does the system have a. unique solution? b. infinitely many solutions? c. no solution?

    asked by Dan on December 18, 2012
  19. science

    How many liters of a 0.80%\% (m/v{\rm m/v}) NaCl{\rm NaCl} solution can be prepared from 500mLmL of a 9.0%\% (m/v{\rm m/v}) stock solution?

    asked by Lanita on May 5, 2014
  20. Chemistry

    Calculate the pH of a solution that is 0.124 M C2H5NH2 and 0.124 M C2H5NH3Cl. (Assume that the solution is at 25°C.)

    asked by Margaret on March 13, 2013
  21. chemistry urgent

    if 500 ml of HCl solution is needed to react with 2.43 g of Mg, what is the molarity of the HCl solution?

    asked by Lynn on November 30, 2010
  22. chemistry

    if 200.0 ml of 0.800 m is prepared from a 70.0 ml stock solution, what is the molarity of stock solution

    asked by Anonymous on March 11, 2011
  23. Math

    I have a graph which is graphed by the equation f(x) = |x| - 4 and I'm asked to find the solution to the equation f(x) = 0. What would the solution be?

    asked by Anonymous on February 5, 2014
  24. science

    What volume of a 6.0 M NaOH solution would you need to prepare 250.0 milliliters of a 3.0 M NaOH solution?

    asked by john on November 1, 2012
  25. Algebra

    A Chemist needs 200 liters of 30% acid solution. she has a 20% and 50% acid solution. How much of each must she mix?

    asked by Aleeyah Lacuesta on July 7, 2015
  26. chemistry

    how do you calculate the molaarity of a water solution of CaCl2, given that 5.04 L of the solution contains 612 g of CaCl2.

    asked by denise on June 13, 2010
  27. chemistry

    How many mL of a 0.90% (m/v) NaCl stock solution will you need to to prepare 250 mL of a 0.225% m/v NaCl solution?

    asked by nate on December 5, 2010
  28. Calculus

    Find the particular solution to y"=3sin(x) given the general solution y=-3sin(x) +Ax+B and the initial conditions y (π/2)=π and y'(π/2)=2

    asked by Alice on March 3, 2019
  29. chemistry

    What volume of a 6.0 M NaOH solution would you need to prepare 250.0 milliliters of a 3.0 M NaOH solution?

    asked by Anonymous on January 5, 2012
  30. chemistry

    what are the steps for making 0.5 aqueous solution of MgCl2? What are the necessary steps to make this solution?

    asked by maricel on April 25, 2012
  31. math

    how many liters of water must be added to 30 liters of a 20% alcohol solution to dilute it to a 15% solution?

    asked by Dawn on April 6, 2010
  32. Math

    How many liters of water should be added to 20 liters of 40% solution of acid to obtain 30% solution?

    asked by Daniel on June 27, 2011
  33. chemistry

    You have four beakers labeled A, B, C, and D. In beaker A, you place 100 grams of silver nitrate and enough water to make 50 mL of solution. In beaker D, you place 100 grams of KCl and enough water to make 100 mL of solution. You also pour 100 mL of water

    asked by brandi on April 24, 2008
  34. Physics

    Suppose you’re eating in a restaurant where the dishes are shared at the table and all placed uniformly on a rotating disk-like surface. Model this surface as a thin disk of radius 33.4 cm. You can’t stop thinking about physics even though you’re out

    asked by Santhiya on April 22, 2016
  35. Chem

    An antifreeze solution is prepared containing 40.0 g of ethylene glycol (molar mass = 62.0 g/mol) in 60.0 g of water. Calculate the freezing point of this solution. Which calculation is it? A. 120.1⁰C B. -20.1⁰C C. 0.518 ⁰C D. 20.1⁰C

    asked by Cherry on August 8, 2016
  36. Chemistry - check answers

    1) Which of the following sets is arranged according to increasing base strength? A) F-, OH-, Cl- B) F-, Cl-, OH- C) OH-, F-, Cl- D) OH-, Cl-, F- E) Cl-, F-, OH- (my answer) 2) What is the pH of a solution formed by adding 4.3 x 10^-5 moles of KOH in 1 L

    asked by Amanda on April 30, 2014
  37. chemistry

    If a student added 42.6 grams of sodium sulfite to 780.4 grams of water and determined that 3.40 grams of the new solution occupied 3.20ml, what is the weight percent, molality, and molarity of the solution produced?

    asked by Sumaiyah on July 18, 2013
  38. Chemistry

    In lab we did thermochemistry, where we are supposed to find the heats of solution, heat change of calorimeter and molar heat solution of the salt. I calculated that the calorimeter constant for the water we had was 883.194 Joules. We took 1/10 of a mole

    asked by Rani on October 31, 2010
  39. Math

    Use the point-slope form linear equation given to complete the following problems. y-3=3(x+1) 1. What is the slope of the given line? Here's what I did: y-3=3(x+1) y-3+3=3x+3 y=3x+6 m=3 Correct so far? 2. What point does this line pass through, which is

    asked by Elizabeth on January 23, 2014
  40. Chemistry

    A solubility graph showing the solubility in grams of substance X in 100.0 g of alcohol. At 20 degrees Celsius, 24.0 grams of substance X will dissolve. At 50 degrees, 60.0 grams will dissolve. A saturated solution of X (s) in alcohol is cooled down from

    asked by Spencer on June 22, 2018
  41. trigonometry

    1) Find the exact value of the expression: tan−1(tan(−120651/47π))... How do you find Tan(-120651/47pi)? I don't know how to find exact values, if it's not a recognizable value. 2)Find a simplified expression for tan(sin−1(a/5))... Because tan = y/x

    asked by Dan on May 3, 2015
  42. Chemistry

    Hi, my question is: "Classify each of the following as saturated, supersaturated, or unsaturated: KNO3 90g/100g at 82*C NaCl 36g/100g at 23*C KCl 35g/100g at 18*C NaNO3 90g/100g at 28*C How do I determine if they are saturated, supersaturated, or

    asked by Waleed on June 11, 2006
  43. Chemistry

    In the Sandwich Shop, select the "Cheese sandwich" option and observe the equation given for the preparation of a cheese sandwich. In the equation, set the number of bread slices to "2" and the number of cheese slices to "1." You will see that the product

    asked by Brittany on April 14, 2015
  44. physics

    An astronaut is on the surface of planet whose air resistance is negligible. To measure the acceleration due to gravity(g) he throws a stone upwards. He observe that the stone reaches the surface to a maximum ht of h =10m(which is negligible is compare

    asked by karan on August 19, 2014
  45. Chemistry

    Lets say you have 25 ml of a 3.25M copper(II) chlorate solution. How many moles of copper (II) chlorate would be in the solution and how many moles of the copper(II) ion would be in the solution?

    asked by Heather on September 22, 2015
  46. math

    How many cubic centimeters of a 25% antibiotic solution sould be added to 10 cubic centimeters of a 60% antibiotic solution in order to get a 30% antibiotic solution?

    asked by james on October 18, 2009
  47. math

    How many cubic centimeters of a 25% antibiotic solution sould be added to 10 cubic centimeters of a 60% antibiotic solution in order to get a 30% antibiotic solution?

    asked by james on October 18, 2009
  48. chemistry

    Select only the True statements about buffer systems. Select all that are True. 1. Starting with NH3(aq) and adding a small amount of HCl(aq) will make a buffered solution. 2. The blood buffer, among other things, is supported by carbonic acid and its

    asked by bekah on March 28, 2014
  49. 8th Grade Algebra- Answer Check

    Solve each system of equations, give the solution and state whether there are no solutions or many solutions. 1 )3x + 8y = 1 7x + 4y = 17 Answer: (3,1) 2) -3x + 5y = -7 9x + 2y = 38 Answer: (4,1) 3) 7r + 3s = 13 14r - 15s = -16 Answer: (1,2) 4) 2x - 7y =

    asked by Lily on February 25, 2009
  50. college chemistry

    In the derivation of this expression: [ln]/[HIn]A# 2 * A#1,acid/A# 2,basic * A#1 We assumed that the HIn form of the indicator is the only form present in the most acidic solution. Is this a valid assumption? Why or why not? Support your answer by

    asked by Cristian on October 1, 2012
  51. Chemistry

    In the derivation of this expression: [ln]/[HIn]A# 2 * A#1,acid/A# 2,basic * A#1 We assumed that the HIn form of the indicator is the only form present in the most acidic solution. Is this a valid assumption? Why or why not? Support your answer by

    asked by Cristian on October 1, 2012
  52. grade 12 chemistry

    Solubility equilibrium: is dynamic equilibrium in a saturated solution between excess solute and aqueous solution(solvent) or between crystals and dissolved solute--> no it has to be crystals and solvent right becuase crystals are basically solute not

    asked by sam on July 20, 2009
  53. chemistry

    what is observeed when carbon dioxide was bubbled into bromothymol blue? a. the color of the solution changed from greenish to yellow color. b. the solution turned cloudy c. the color of the solution changed from yellow to colorless d. a precipitate formed

    asked by grace on May 10, 2010
  54. Algebra

    Special factorization I know someone has helped me with this before, but I'm really stuck on how to attack these two problems [(8x^3)/125]+[64/(y^3)] X^2-8xy+16y^2-25

    asked by Yaga on September 3, 2016
  55. Statistics

    What key problems can a supermarket address and solve utilizing the poisson/exponential combination?

    asked by Jason L on March 7, 2007
  56. life orientation

    in 10-15 lines critically discuss 5 ways in which yhe tsunami problems impacts on the community

    asked by thobeka on April 24, 2013

    what are the problems created by using molecular oxygen as a recipient of the electrons from the oxidation of carbon compounds.

    asked by DAN on March 14, 2011
  58. math

    need help to solve the following ploblem, and like problems: 5 minutes = _____ hours (what is the fraction) I'm in the 5th grade

    asked by Janae on January 31, 2008

    what type of psychologists are primarily interested in how individuals remember, reason, and solve problems

    asked by LA TANYA on June 22, 2011
  60. Math

    Can anyone explain Horizontal Equalities Equations? I also would appreciate examples of problems and the steps to solve the problem.

    asked by Jo Anne on December 7, 2007
  61. Math

    MULTIPLY. WRITE EACH PRODUCT IN SCIENTIFIC NOTATION. 24.) (3 * 10^6)(2 * 10^12) 26.) (6 * 10^9) (5 * 10^4) Can you please show your work so I can get a better understanding of these problems?

    asked by InDireNeedOfHelp on June 6, 2014
  62. math

    Josh completed 2 math problems in 2 minutes. Julia says he did 3/5 of a problem each munute. is she correct?

    asked by Camila on January 10, 2014
  63. social

    what are the minorities faced in India facing today .what measures do you suggest to eradicate problems ???

    asked by ahalya on September 17, 2014
  64. sci 241

    lactose intolerance, Crohn’s disease What are some of the ways these two digestive problems can be remedied or relieved?

    asked by meshelle on January 27, 2009
  65. Math help, plz

    Can anyone help me with this? It's practice problems. I really do not understand this :( 4. m ¨C 7 < 6 m < ¨C1 m > 1 m < 13 m < ¨C13 5. y + 5 ¡Ý 7 y ¡Ü 2 y ¡Ü 12 y ¡Ý 2 y ¡Ý 12 6. p + 12 > 9 p > 21 p > 3 p > ¨C21 p > ¨C3 7. Translate the

    asked by Princess Anna on January 7, 2014
  66. Trig

    How do you solve this problem? y = 2sin 3x + 4sin 2x I haven't done these types of problems for awhile and have forgotten how to do them.

    asked by Mary on March 5, 2014
  67. Algebra:'(

    I understand how to multiply a polynomial by a monomial for example 6pq(3p^2+4q)= 18p^3q+24pq^2 but i don't know how to do problems like this 5(2s-1)+3=3(3s+2) HELP PLEASE!!

    asked by EmilyMay on November 28, 2012
  68. math

    given the linear equation y=-4/3x+1, find the y-coordinates of the point(-6

    asked by lori on August 22, 2011
  69. Life orientation

    Give me 3 institutions or community organizations that are involved in giving redress to floods problems

    asked by Cpho on April 23, 2013
  70. math

    Provide two different methods to simplify each of the problems below. Please write all final answers using positive exponents. Q One: (-4m^-2 n^2)^3 * (2m^3 n)^-1 Q Two: (X^-1/2 Y^3)^-2 -------------------- XY^1/3 * X^2 Y^-4

    asked by rondy on February 20, 2019
  71. Calculus

    I need help with these two review calculus problems for my final exam. What is the derivative of a). (5x^2+9x-7)^5 b). Lne^x^3 For a. I got 50x+45(5x^5+9x-7)^4 For b. I got 3x^2 Can you verify please?

    asked by Sam on May 21, 2012
  72. accounting

    What kinds of problems could be created in a financial report is not reliable, relevant, consistent or comparable?

    asked by megan on June 27, 2011
  73. spanish

    In fuente ovejuna which characters are based on real historic people? I am having problems with this play, thanks

    asked by bodes on September 4, 2008
  74. Iraq

    What were some of the problems that Sir Percy Cox encountered in Iraq after centuries of Ottoman rule

    asked by Arazonia on October 22, 2017
  75. Pre-algebra

    So i am having a hard time with special right triangles and wanted to know how to solve problems such as: (45,45,90) and (30,30,60) problem. I know how to do it but need extra help.

    asked by Alex I. on March 7, 2011
  76. health

    What are common causes of short-term stress? A. Too much to do in not enough time B. Lots of little problems in the same day C. Getting lost D. All of the above D?

    asked by kevin on August 27, 2014
  77. Communication Language Studies

    What kind of problems might occur in mixed gender interviewing situations or committee meetings?

    asked by Breanna on March 13, 2010
  78. random variables

    For the standard normal random variable Z, compute the following probabilities. For the following problems, use four decimal places. 16. P (0 ¡Ü Z ¡Ü .9) 17. P (-1.3 ¡Ü Z ¡Ü 0) 18. P(Z > 2.5) 19. P(Z ¡Ý -.75) 20. P(Z < .05) 21. P (Z ¡Ü -.72)

    asked by Donna on August 2, 2010
  79. properties

    Apply the properties discussed in this section to simplify each of the following as much as possible. Show all work. I don't know how to do these problems. 4x-2-3x 4x-(2-3x)

    asked by heaven on August 16, 2009
  80. Environmental problems

    How did pre-modern Europeans understand and deal with what we would today call environmental problems?

    asked by Nick on July 31, 2011
  81. Math

    Quadratic equations in problems: "The sides of a right triangle are (x+1)cm, (x+3)cm and (x+5)cm. find the length of each side." i need help asap

    asked by b on February 21, 2018
  82. math

    my daughter is working on 5n + 2n - (3-10N) can someone walk me through how to solve problems like this I have not been in school in over 20yrs. I think you have to work () first? but really do not know HELP please thank you

    asked by kevin on September 13, 2012
  83. algebra with pizzzaz worksheet

    does anyone know why do girls like guys who wear shirts with eight buttons? I have tried all of the problems two times each and still cannot make any sense of it. thanks!

    asked by jackie on February 3, 2009
  84. math

    hello! please help me my problems..I cant really understand this... Draw and explain an angle of depression of a boat from a cliff is 39 degrees.

    asked by irish on January 22, 2014
  85. Algebra

    I just cannot seem to get these two problems. Any help is greatly appreciated. Use the method of substitution to solve the system. xy= 4 5x − y + 19= 0 and y^2 − 4x^2 = 7 9y^2 + 16x^2 = 323

    asked by jobe on April 8, 2013
  86. Science

    in science, skepticism means coming up with inventive way to solve a problems or produce new things

    asked by Mia on September 8, 2016
  87. To: Anonymous, Juan, Jenny

    Please do not post several related questions under different names. You're also more likely to receive help if you give us an idea of your thinking on these problems.

    asked by Ms. Sue on October 11, 2009
  88. math

    these are the problems to convert to base 10. 1. CDXLIV 2. 432 then has five next to it 3. ET0 then has twelve next to it 4. 1011 then has two next to it 5. 4136 then has seven next to it

    asked by Stacey on September 17, 2010
  89. math

    Factor completley 12r^2 +36rf +27f^2 5x^5-20x^4+30x^3 Can anyone please help me with these two problems. I have to get them done and do not understand them. Please help me.

    asked by Susan on September 5, 2010
  90. Health and science

    What problems could a solar powered pond water filter solve and what impact would it have on people?

    asked by smart1111 on January 19, 2016
  91. Physics

    I don't understand any thing about the centripital force and torque please HELP me to solve problems about this topics.

    asked by John on August 29, 2011
  92. 402 soc

    How does the political-economic system affect the problems related to the American economy and work?

    asked by meshelle on March 20, 2010
  93. Statistics

    What key problems can a supermarket address and solve utilizing the poisson/exponential combination?

    asked by katie on March 8, 2007
  94. Life orientation

    Types of community organisations that are involved in supporting or giving redress to inviromental problems

    asked by Vanessa on May 1, 2011
  95. algebra last post

    I appreciate the help. i take the class online and we get 70 problems a day to do. sqrt = < sign #46.

    asked by Brenna on April 2, 2010
  96. psy 270

    explain one way in which sociocultural biases in testing might pose problems for assessing mental retardation.

    asked by trudy on March 19, 2010
  97. Psychology

    Give a possible reason that if a part of the brain were injured, the expected behavior problems might not occur.

    asked by adrina on January 15, 2012
  98. Calculus

    Please help me solve these problems. 1.Find the inverse function (f^-1) of √3x-2 2. Integration ∫ the top is x while the bottom is 1. (sin(t))/t dt

    asked by Jessica on February 19, 2017
  99. Health

    What safety and health problems are associated with storing radioactive waste in deep geological repositorites?

    asked by slomo on November 13, 2014
  100. Com 150

    I am having problems with week 5 assignment, Documenting Sources. Do I use my final project topic or do I choose another one?

    asked by Cathy on February 25, 2009