1. maths/physics/biomechanics

    At the beginning of a race, a yacht crosses the start line and sails in westerly direction at a speed of 4 m s-1. The current of the sea is flowing at 2 m s-1 towards the north-east. Calculate how far [8 marks] and in what direction (relative to west) [8

    asked by alex on February 9, 2012
  2. speech

    Choose one of the following topic sentences. Write an eight-sentence paragraph that fully develops the topic. A. The number of automobile accidents in my town can be reduced. B. People are moving from the cities to the suburbs in increasing numbers C.

    asked by Cris on June 4, 2007
  3. physics

    A 2.8-kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. The elastic potential energy of the spring/mass system is 1.2 J. What is the elastic potential energy of the system when the 2.8-kg block is replaced by

    asked by Lynn on January 26, 2010
  4. Physics

    Two air-track carts move toward one another on an air track. Cart 1 has a mass of 0.336 kg and a speed of 1.16 m/s. Cart 2 has a mass of 0.634 kg. What speed must cart 2 have if the total momentum of the system is is to be zero? What is the system's

    asked by Rocky on November 5, 2012
  5. CIS 105

    Most personal computers come equipped with a version of the Windows operating system, whereas Apple personal computers have a different operating system. Other choices are also available, such as UNIX and Linux. Why do you think Windows is so prevalent?

    asked by Jasmine on October 5, 2010
  6. Physics

    I know that when objects are connected and a force is exerted on the connected objects, we treat them as a system with a single acceleration. I was just wondering if objects were piled on top of each other they would still be connected. if a horizontal

    asked by Thara on August 31, 2011
  7. Physics

    Our teacher gave us a scenario we have to prepare to solve for a lab tomorrow: He has one of those toy flying airplanes suspended from the ceiling on a string of some length. He is going to charge it and start it spinning, and we have to figure out how

    asked by Lauren on March 11, 2008
  8. Algebra

    Use the given information to write a systems of equations, and then solve the system algebraically to answer the question: A car begins at rest and accelerates. Its distance in meters, t, by the formula C(t) =4t^2. A second car, 150 meters ahead, is

    asked by Beka on February 10, 2016
  9. IT205

    I have a paper due tomorrow, well on Sunday may 4th of 2008. It needs to be in APA format and it should have 1400-1700 words. The guidelines is on the Bead Bar and it's System Development Plan. Below is an essay I have started on and I would like to have

    asked by Guest on May 4, 2008
  10. math

    consider a two server system which a customer is served first by server 1, then by server 2 and then departs. the server times at server i are exponential random variables with rate ui i = 1,2. a)When you arrive you find server 1 free and you find server

    asked by skl on May 10, 2007
  11. Chemistry

    The diagram shows an electrochemical cell with a gold strip (left) and aluminum glasses (right). In your response, do the following: • Label the cathode and the anode, including the charge on each. • Show the flow of electrons. • Describe what type

    asked by kat on May 13, 2016
  12. Physics

    I need help with these two. 1. A horizontal force pulls a 20-kg box across the floor with constant speed. μs is 0.60, how much work does F do in moving the cart 3.0 m? 2. A 400 lb load of bricks is to be lifted to the top of a scaffold 30 feet high. How

    asked by Yurii on October 23, 2015
  13. physics

    A man whose mass is 70 kg walks up to the third floor of a building. This is a vertical height of 12 m above the street level. (a) How many joules of work has he done? (b) By how much has he increased his potential energy? (c) If he climbs the stairs in 20

    asked by pakilina on November 3, 2011
  14. history

    out of growth of schools, racial discrimination, and education for immigrants, which educational development do you think was most important? Explain. Please remember that we are here to help you learn to do your own work, but not to do it for you. Once

    asked by anonymous on September 21, 2006
  15. Accounting

    I need help with this problem. Could someone possibly explain to me how to prepare the journal entry for this problem? Prepare journal entries to record each of the following purchases transactions of a merchandising company. Show supporting calculations

    asked by Leah on April 17, 2010
  16. geometry

    Find a coordinate rule for a reflection across the line y = 2x. Then use the rule to find the image of triangle ABC = [ 2 6 0 ] [ 3 -4 4 ]. Be sure to clearly show your work indicating how you found your rule. In addition write the coordinate matrix for

    asked by lia on March 1, 2010
  17. chemistry

    A reaction mixture is in a 5.4 L flask at 25 oC initially contains only 7.64 grams of acetic acid. (CH3COOH). Set up your I.C.E. table and use it to answer the following questions. HINT: You will need to look up the Ka for this equilibrium reaction.

    asked by juan on March 1, 2011
  18. word problem

    Directions: Write a system of equations to solve the following word problem graphically and algebraically (using Gauss and using substitution). AMC Homes, Inc. is planning to build three- and four-bedroom homes in a housing development called Chestnut

    asked by kimberly on September 3, 2005
  19. history

    How does Turkey view the events known as the Armenian Genocide? The Ottoman military carried out genocide without the knowledge of Ottoman political officials. Armenians were allied with Russia during WWI, and, therefore, their elimination was necessary.

    asked by Dianni on November 16, 2018
  20. Algebra

    Word problem: A new photocopier can make 72 copies in 2 min. When the older photocopier is operational, the two photocopiers together can make 72 copies in 1.5 min. How long would it take the older photocopier to make 72 copies working alone? Show work.

    asked by Sandra on May 1, 2014
  21. Science

    1. How do scientists classify small objects in the solar system? by size by shape by size, shape, and temperature by size, shape, and composition** 2.Which of the following categories of small bodies in the solar system does Ceres belong to? dwarf

    asked by lifeisgreat on May 11, 2016
  22. PHYSICS PLEASE HELP

    A very large firecracker explodes in the hallway into 3 fragments. Physics students rush to the scene to enrich their knowledge of the law of conservation of momentum. They report that Fragment 1: mass=1.23kg, v=8.70m/s, north Fragment 2: mass

    asked by Maddie on April 28, 2015
  23. Socials-Ms. Sue

    The letter is addressed to a friend, so I wrote the truth instead of hiding it like I did in the other letter. I just need help on the last part- Explain why you think that it is undesirable to improve working conditions. Dear....... my friend Alexander

    asked by Sara on November 29, 2009
  24. Chemistry

    Muriatic acid is the common name of industrial-grade hydrochloric acid (HCl). One of its uses is to clean or etch concrete in preparation for sealing or painting. It is typically sold in 5.00 gallon buckets, with a concentration of 11.7 M. a.What volume of

    asked by Amber on October 5, 2012
  25. Chemistry help pliz

    Explain (using equations) how a solution of 1.0 mol dm^-3 in both CH3COOH and CH3COONa is resistant to changes n pH when we add either small amounts of acid or small amount of base (such solution is called a buffer)

    asked by Petty on September 22, 2011
  26. chemistry

    A solution was prepared by dissolving 0.834 g of sulfur, S8, in 100.0 g of acetic acid, HC2H3O2. Calculate the freezing point and boiling point of the solution. (Use the table from the textbook.)

    asked by george on April 15, 2013
  27. Chemistry

    A 4.50 g sample of LiCl at 250 C dissolves in 25.0 ml of water also at 25.0 C.? The final equilibrium temp of the resulting solution is 60.8 C. What is the enthalpy of solution, deltaHs, of LiCl expressed in kilojoules per mole.

    asked by Jeff on September 5, 2010
  28. chemistry

    A scientist wants to make a solution of tribasic sodium phosphate, \rm Na_3PO_4, for a laboratory experiment. How many grams of \rm Na_3PO_4 will be needed to produce 575 mL of a solution that has a concentration of \rm Na^+ ions of 1.00 \it M?

    asked by kim on September 19, 2010
  29. Chemistry

    A solution is made by dissolving 0.526 mol of nonelectrolyte solute in 831 g of benzene. Calculate the freezing point and boiling point of the solution. Constants may be found here.

    asked by Heather on February 21, 2012
  30. chemistry

    53.0 mL of a 1.50 M solution is diluted to a total volume of 258 mL. A 129-mL portion of that solution is diluted by adding 195 mL of water. What is the final concentration? Assume the volumes are additive.

    asked by Jen on March 26, 2013
  31. chemistry

    59.0 mL of a 1.40 M solution is diluted to a total volume of 278 mL. A 139-mL portion of that solution is diluted by adding 129 mL of water. What is the final concentration? Assume the volumes are additive.

    asked by lee on April 17, 2013
  32. chemistry

    A solution was prepared by dissolving 0.834 g of sulfur, S8, in 100.0 g of acetic acid, HC2H3O2. Calculate the freezing point and boiling point of the solution. (Use the table from the textbook.)

    asked by george on April 15, 2013
  33. chemistry

    A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 400 mL of a solution that has a concentration of Na+ ions of 1.00 M?

    asked by Colin on October 13, 2011
  34. chemistry

    1.)How many grams would you need of a sample known to be 99.81% AgN03 by mass? You are asked to prepare 150.0 mL of 3.15×10−2 M AgNO3. 2.) An aqueous solution is 6.40% methanol CH3OH by mass, with d = 0.988 g/mL} What is the molarity of CH3OHOH} in this

    asked by Andrew on February 16, 2010
  35. Chemistry

    75.0 mL of a 1.20 M solution is diluted to a total volume of 248 mL. A 124-mL portion of that solution is diluted by adding 111 mL of water. What is the final concentration? Assume the volumes are additive.

    asked by Daric on February 13, 2015
  36. CHM 152

    The freezing point of an aqueous solution of glucose was measured to be -1.52 oC. What is the osmotic pressure, in atm, of 100 mL of this solution at 25.0 oC? (Kf = 1.86 oC/m) When I calculated it out I got 16.79 atm but the answer was wrong don't know

    asked by Car on June 10, 2010
  37. chem

    A 0.050 L solution of H2SO4 requires 200.0 mL of 4.0 M NaOH for phenophthalein to turns pink to colorless. What is the molarity of the original H2SO4 solution? I got 4M but my instructor said it's 8M how did he get that? Pls need help figuring it out.

    asked by Tricia on December 7, 2012
  38. Chemistry

    what type of reaction occures when a hydrochloric acid solution is mixed with a sodium bicarbonate solution? I chose gas evolution, but am wondering if it is acid-base neutralization instead.

    asked by Coug on November 20, 2009
  39. chemistry

    What mass of sucrose should be combined with 491 g of water to make a solution with an osmotic pressure of 8.70 atm at 270 K? (Assume the density of the solution to be equal to the density of the solvent.)

    asked by ashley on August 5, 2010
  40. Chemistry

    Consider the unbalanced redox reaction: Cr2 O7 2-(aq) + Cu(s) ----> Cr3+(aq) + Cu2+ Balance the equation in acidic solution and determine how much of a 0.850 M K2 Cr2 O7 solution is required to completely dissolve 5.25 g of Cu.

    asked by t on July 22, 2014
  41. Chemistry 2

    A saturated solution of a certain metal(II) chloride has a chloride ion concentration of 0.032M. The Ksp for this compound can be determined to be a) 2.6 X 10-7 b) 4.1 X 10-6 c) 1.6 X 10-5 d) 2.6 X 10-4 e) 1.6 X 10-2 I am unsure how to approach this

    asked by Sheri on April 5, 2012
  42. college chem

    What mass of sucrose should be combined with 524 g of water to make a solution with an osmotic pressure of 8.50 atm at 270 K? (Assume the density of the solution to be equal to the density of the solvent.)

    asked by moe on September 12, 2010
  43. Chemistry

    500ml of 0.250M Na2SO4 solution is added to an aqueous solution of 15.00 g of BaCl2 resulting in the formation of white precipitate of BaSO4. How many moles and how many grams of BaSO4 are formed?

    asked by Natasha on August 9, 2012
  44. ecc

    A solution was prepared by dissolving 0.834 g of sulfur, S8, in 100.0 g of acetic acid, HC2H3O2. Calculate the freezing point and boiling point of the solution. (Use the table from the textbook.)

    asked by george on April 15, 2013
  45. chemistry

    A sample of the primary standard, Potassium hydrogen phthalate, weighing 0.3589g requires 14.96mL of NaOH solution for neutralization. calculate the molarity of the NaOH solution.

    asked by Reen on October 21, 2009
  46. chemistry

    Calculate the concentration of nitrate ions, NO3- , in mol dm-3, of a solution made by dissolving 2.5000 g of ferric nitrate nonahydrate in water to give 2.000 L of solution.

    asked by Gemma on January 30, 2012
  47. Chemistry

    59.0 mL of a 1.60 M solution is diluted to a total volume of 268 mL. A 134-mL portion of that solution is diluted by adding 111 mL of water. What is the final concentration? Assume the volumes are additive.

    asked by Alex on September 7, 2014
  48. chemistry

    A solution was prepared by dissolving 0.834 g of sulfur, S8, in 100.0 g of acetic acid, HC2H3O2. Calculate the freezing point and boiling point of the solution. (Use the table from the textbook.)

    asked by george on April 15, 2013
  49. chemistry

    1.)How many grams would you need of a sample known to be 99.81% AgN03 by mass? You are asked to prepare 150.0 mL of 3.15×10−2 M AgNO3. 2.) An aqueous solution is 6.40% methanol CH3OH by mass, with d = 0.988 g/mL} What is the molarity of CH3OHOH} in this

    asked by Andrew on February 16, 2010
  50. Chemistry

    Chester makes 1L of a 0.01M HCl solution and measure the pH. Burt then adds 5.80 g of sodium chloride to Chester’s solution and measures the pH. Calculate the difference between the two pH values obtained.

    asked by Anonymous on February 14, 2014
  51. Chemistry

    Hydroxylapatite, Ca10(PO4)6(OH)2, has a solubility constant of Ksp = 2.34 × 10^-59. Solid hydroxylapatite is dissolved in water to form a saturated solution. What is the concentration of Ca2 in this solution if [OH–] is somehow fixed at 5.30 × 10^-6 M?

    asked by C on April 4, 2013
  52. chemistry

    Calculate the following quantity: Volume in mL of 21.4 M cobalt(II) chloride solution that must be diluted with water to prepare 17 mL of an 51.5 M solution. Calculate to 0 decimal places and do not include units. Also, do NOT use scientific notation.

    asked by Ocsar on September 14, 2014
  53. chem

    I have no idea where to start with this one... Calculate the concentration (M) of sodium ions in a solution made by diluting 40.0ml of a 0.474m solution of sodium sulfide to a total volume of 300ml

    asked by Ann on March 8, 2015
  54. Chemistry

    If 20g of NaCl was used to form a 250cm3 of saturated solution of NaCl at 25oC. Calculate the solubility of the salt in mol/dm3 at that temperature. (Relative density of solution-1).

    asked by Ruth on December 12, 2018
  55. chemistry

    A scientist wants to make a solution of tribasic sodium phosphate, \rm Na_3PO_4, for a laboratory experiment. How many grams of \rm Na_3PO_4 will be needed to produce 575 mL of a solution that has a concentration of \rm Na^+ ions of 1.00 \it M?

    asked by kim on September 19, 2010
  56. chemistry

    at a temperature of 5 celsius, 21.5 mg of a non electrolyte is dissolved in enough water to make a 150.0 ml solution. the osmotic pressure of the solution is 0.200 atm. what is the molar mass of the substance dissolved

    asked by amelia on September 8, 2014
  57. Chemistry

    When 2.50g of an unknown solute is dissolved in 40.0g of ethanol the solution boils at 79.4C. The normal boiling point of this substance is 78.4C and it has a kb of 1.22C/m. (a) What is the molality of this solution? (b) What is the molecular weight of the

    asked by Mark on January 9, 2011
  58. Science

    A solution is prepared by dissolving 4.9 grams of sucrose in 17gram of water. At 25 degree Celsius find the boiling point, freezing point and osmotic pressure of this solution.

    asked by Amara on December 18, 2018
  59. Chemistry

    50 mL of a 2.5 M solution of ammonium phosphate is added to 100 mL of 1.5 M solution of calcium nitrate. At the end of the reaction 11.2 grams of solid product were obtained. Whats the % yield of this reaction?

    asked by Hillary on April 17, 2011
  60. Chemistry

    A watch is to be electroplated with gold. - provide a solution that would make a suitable electrolyte for this cell. This is the only question I'm having a little trouble with. I'm not quite sure how to figure out what the electrolyte solution is made of.

    asked by Hannah on September 9, 2012
  61. Chemistry

    59.0 mL of a 1.80 M solution is diluted to a total volume of 268 mL. A 134-mL portion of that solution is diluted by adding 171 mL of water. What is the final concentration? Assume the volumes are additive.

    asked by Robert on March 19, 2013
  62. chemistry

    71.0 mL of a 1.30 M solution is diluted to a total volume of 238 mL. A 119-mL portion of that solution is diluted by adding 105 mL of water. What is the final concentration? Assume the volumes are additive.

    asked by mat choma on September 28, 2016
  63. Chemistry

    to make a sodium chloride solution of the same molarity as household bleach (as determined in question 1) how many grams of salt would be needed for every 100 ml of solution question 1 answer: 0.871 M

    asked by Lola on February 7, 2016
  64. Chemistry

    What is the concentration, in mol L-1, of a solution containing 1.2 g of lithium carbonate in 100 mL solution? Give your answer as 2 sig fig, followed by a space and the units (remember the units given in a previous question).

    asked by Sameera Ready on June 13, 2012
  65. Chemistry

    Calculate the percent ionizationof a 0.15 M benzoic acid solution in pure water Nd also in a solution containing 0.10M sodium benzoate. Why does the percent ionization differ significantly in the two solutions?

    asked by L.Bianchessi on March 12, 2012
  66. chemistry

    A salt solution can be acidic, basic, or neutral. when dissolved in water, which of the following salts will make the solution basic: KCl, FeCl3, NaNO3, CaCO3, LiF, and NH4Br?

    asked by max on April 17, 2011
  67. science

    Balancing redox reactions Balance in acid solution 1. PH3+ I2 -> H3PO4 + I- 2. ClO3- + Cl- -> Cl2 Balance in basic solution Se -> Se2- + SeO3^2- BrO- + Cr(OH)4^- -> Br- + CrO4^2-

    asked by Joseph on September 7, 2010
  68. Chemistry

    10. When a 5.00 mL sample of vinegar is titrated, 44.5 mLof 0.100 M NaOH solution is required to reach the end point. What is the concentration of vinegar in moles per liter of solution (molarity, M)?

    asked by Anonymous on November 25, 2012
  69. chemistry

    0.5123 g KHP sample was dissolved in about 25 mL of distilled water, and titrated to the phenolphthalein endpoint with 28.75 mL of a sodium hydroxide solution. Calculate the molar concentration of the hydroxide solution

    asked by Cynthia on October 16, 2010
  70. chemistry

    a scientist wants to make a solution of tribasic sodium phosphate ,Na3PO4, for an experiment. how many grams of Na3PO4 will be needed to produce 750 mL of a solution that has a concentration of Na+ ions of 1.30M

    asked by kathryn on March 14, 2010
  71. Chemistry

    75.0 mL of a 1.20 M solution is diluted to a total volume of 248 mL. A 124-mL portion of that solution is diluted by adding 111 mL of water. What is the final concentration? Assume the volumes are additive.

    asked by Daric on February 13, 2015
  72. chemistry

    63.0 mL of a 1.30 M solution is diluted to a total volume of 248 mL. A 124-mL portion of that solution is diluted by adding 173 mL of water. What is the final concentration? Assume the volumes are additive.

    asked by Anonymous on December 7, 2014
  73. Chemistry

    12 mL of 0.0100 M HCl are added to 25.0 mL of a buffer solution that is 0.010 M HC2H3O2 and 0.11 M C2H3O2-. What is the pH of the resulting solution? I understand to use the ice calculations. I don't understand what to plug into the hh equation.

    asked by lil on March 6, 2016
  74. chemistry

    59.0 mL of a 1.60 M solution is diluted to a total volume of 268 mL. A 134-mL portion of that solution is diluted by adding 173 mL of water. What is the final concentration? Assume the volumes are additive?

    asked by John S. on September 21, 2017
  75. Chemistry- dilution

    51.0 mL of a 1.20 M solution is diluted to a total volume of 248 mL. A 124-mL portion of that solution is diluted by adding 125 mL of water. What is the final concentration? Assume the volumes are additive.

    asked by Chelsea on October 13, 2013
  76. Chemistry

    calculate the ph of a solution that results from titrating 0.0500 moles of cyanic acid to the equivalence point with an equal number of moles of OH-, if the final volume of the solution is 150 ml ka= 3.50 * 10^-4

    asked by Tasneem on April 6, 2012
  77. Chemistry 1

    We are working on molarity of a solution in my class, and I am a little stumped on how to set the problems up. Here is one question from my homework. How many grams of NaCl are needed to make 575mL of 1.5 M NaCl solution? Thank you in advance :)

    asked by Emily on January 3, 2013
  78. chemistry

    50.0ml of an aqueous solution of 2.50M H3PO4 are mixed with 75.0 ml of an aqueous solution of 4.00 M Ca(OH)2. The resulting precipitate is washed and isolated using filtration. What mass of Ca3(PO4)2 is obtained?

    asked by tricia on February 9, 2014
  79. Chemistry

    the density at 20 degrees celcius of a .258m solution of glucose in water is 1.0173 g/ml, and the molar mass of glucose is 180.2 g/mol. What is the MOLARITY of the solution? i need an explanation on how to go about solving this...

    asked by EGreenblatt on October 20, 2008
  80. Chemistry

    77.0 mL of a 1.20 M solution is diluted to a total volume of 288 mL. A 144-mL portion of that solution is diluted by adding 155 mL of water. What is the final concentration? Assume the volumes are additive.

    asked by Gmp on May 10, 2013
  81. chemistry

    A 300 mL solution of 0.0500 M HCl is titrated with 1.00 M KOH. How many mL of the KOH solution will be needed to reach the equivalence point of this titration? A.5 mL B.10 mL C.50 mL D20 mL E15 mL The answer i got was E. 15ml

    asked by danny on March 21, 2015
  82. chemistry

    a solution contains Cr3+ ion and Mg2+ ion. The addition of 1.00 L of 1.55 M NaF solution is required to cause the complete precipitation of these ions as CrF3(s) and MgF2(s). The total mass of the precipitate is 49.8 g.

    asked by Lynn on January 28, 2012
  83. Phyics

    I have a few questions that I need help with please. Show by algebraic reasoning that your gravitational acceleration toward an object of mass M a distance d away is a = GM/d2 and therefore doesn’t depend on your mass. (I don't understand this question)

    asked by Soly on October 5, 2007
  84. Organic Chemistry

    A 0.160 M solution of an enantiomerically pure chiral compound D has an observed rotation of 0.20° in a 1-dm sample container. The molar mass of the compound is 128.0 g/mol. (a) What is the specific rotation of D? (b) What is the observed rotation if this

    asked by Trish on September 29, 2014
  85. physics

    Two particles A and B of respective masses M(B) and M(A) are connected together by means of an inextensible string of negligible mass. The string passes over the groove of a pulley of negligible mass. At instant to=0 the system S(pulley,mass,string) is

    asked by vicky on September 20, 2016
  86. Ap chemistry

    Suppose NaOH is added to the following system when it is at equilibrium. NH3 (aq) + H2O (l) = NH4 (aq) + OH (aq) a) in which direction will the reaction shift after the NaOH is added? b) will this stress increase or decrease the value of the reaction

    asked by Ivey on March 5, 2015
  87. Algebra 1 (PLZ HELP)

    I just need to check a few answers, I really don't want to do bad Which number is a solution of the Inequalty y + 2 > 8 A) -5 B) -6*** C) 6 D) 7 Which number is a solution of the Inequality 6 > z(10 - z) A) 0 B) 1 C) 2** D) 3

    asked by Bri83 on October 24, 2017
  88. chemistry laboratory

    1. prepare a buffer solution by using acetic acid and sodium acetate.2. prepare M/40 NAOH solution.

    asked by suchismita mandal on May 31, 2012
  89. CHEMISTRY

    How many grams of dry need to be added to 1.90 of a 0.800 solution of ammonia, , to prepare a buffer solution that has a of 9.00? Kb for ammonia is 1.8*10^-5.

    asked by Abinaya on March 11, 2012
  90. chemistry

    The pH of a solution is 6.0. Explain how the addition of the following substance would alter (or not alter) the pH of the solution. a. HCl b. NaOH c. H20

    asked by steven on January 24, 2011
  91. maths

    a chemist has 800ml of 15% acidic solution.how much pure acid is to be added to make the solution 32% acidic

    asked by pahul on December 10, 2015
  92. chemistry

    An aqueous solution contains 24.2 g of KCl and is diluted to 100. mL. What is the mole fraction of KCl in the solution if the density is 1.12 g/mL?

    asked by abid on July 7, 2011
  93. Chemistry

    how would the presence of a white solid in a solution effect the solution's absorbance? it made its absorbance higher, but i'm not too sure why

    asked by Casey on August 20, 2015
  94. CHEMISTRY

    TO WAT VOLUME SHOULD YOU DILUTE 130ML OF AN 8.40 M CUCL2 SOLUTION SO THAT 65.0ML OF THE DILUTED SOLUTION CONTAINS 5.9 G CUCL2?

    asked by KIM on November 17, 2009
  95. Chemistry

    Calculate the osmolarity of a 2.0 × 10-3 M Na3PO4 solution. Na3PO4 is an ionic compound and produces an electrolytic solution.

    asked by Chemistry Chick on October 29, 2011
  96. Chemistry

    Na2SO4 solution is slowly added to a solution which contains .10 M Ba (2+) and .1 M Pb(2+). which of the following statements descrives the result of the addition of Na2SO4

    asked by Joe on April 1, 2013
  97. Chemistry

    A solution is made up by dissolving 14.8 g Na2CO3 · 10 H2O in 110.5 g of water. What is the molality of Na2CO3 in this solution?

    asked by Jintau on December 20, 2010
  98. Chemistry

    Calculate the volume of 1.0 M CuSO4 stock solution you should use to make 100 mL of a 0.010 m CuSO4 solution.

    asked by Brianna on September 1, 2016
  99. chem

    What volume of a 8.50M Na2CO3 solution would be required to prepare 220.00mL of a 8.20%w/v Na2CO3 solution?

    asked by darren on November 29, 2011
  100. chemistry

    how much water (in mL's) needs to be added to 330 mL's of a 3.33 molar solution of lithium bromide to make the solution 1.44 molar

    asked by stan on October 13, 2010

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