osmotic pressure chemistry

64,622 results, page 99
  1. CHemistry

    I did a project for lab chemistry where my aim was to see which substance, from a selection of 4 chlorides, recrystallises from a solution to form the most crystals. The 4 chlorides were KCl, NaCl, MgCl2 and CaCl2. KCl and NaCl didn't form any crystals,
  2. Chemistry

    I did a project for lab chemistry where my aim was to see which substance, from a selection of 4 chlorides, recrystallises from a solution to form the most crystals. The 4 chlorides were KCl, NaCl, MgCl2 and CaCl2. KCl and NaCl didn't form any crystals,
  3. Chemistry

    a) The element with the greatest density is osmium, which has a density of 22.6g/cm3. calculate the mass of 32.1 cm3 of osmium. Answer: 22.6g x 32.1 = 725.46 Did I have right answer? b) A team of students determined the density of a sample of wood to be
  4. chemistry

    I did a project for lab chemistry where my aim was to see which substance, from a selection of 4 chlorides, recrystallises from a solution to form the most crystals. The 4 chlorides were KCl, NaCl, MgCl2 and CaCl2. KCl and NaCl didn't form any crystals,
  5. history

    What does concessions mean in the following paragraph? What were the concessions? The leader of the Czech Nazi Party, Konrad Henlein, was urged by Hitler to demand that the Czech government make concessions to the Sudeten Germans. Henlein kept the pressure
  6. Chemistry

    Ok i'm supposed to google these values for my teacher, but i can't get the answer im looking for...if you have them can you give them to me? Latice Energy for: Ammonium Nitrate and Calcium Chloride Hydration Energy for: Ammonium ion, Calcium Ion and
  7. Chemistry

    If you have 200 ml of a 0.1M solution of acetic acid (pka=4.75), 1. How many ml of a solution of 1.O M NaOH would you need to adjust the pH to 5.2? "Chemistry - DrBob222, Wednesday, June 29, 2011 at 8:41pm 200 mL x 0.1M = 20 mmoles. 1. ............HAc +
  8. chemistry

    The letters CHEMISTRY were spray painted in blue paint on the snow. After a while the sun comes out and the snow under the blue paint melts while the snow around the letters do not. Why did the snow under (rather than around) the blue paint melt?
  9. chemistry

    Strychnine, C21H22N2)2(aq) is a weak base but a powerful poison. Calculate the pH of a 0.001 mol/L solution of strychnine. The Kb of strychnine is 1.0 x 10^-6 DrBob222, I am planning on obtaining a pHD in about nine years:P Can you give me some advice on
  10. Heat and properties of matter

    1. How much pressure do you experience, when you balance a 5kg ball on the tip of your finger which has an area of 1cm square. a. 490 kpa b. 4600 pa c. 34n d. No answer 2. Heat can be define as a. The change in the temprature of a body b. The flow of
  11. Ap Physics

    Read the activity 2-1:Force and Pressure in the lab manual (pages 167-168). As described in the manual, consider a 10 cc syringe is connected to a 50 cc syringe. Information of the syringes are as follows: (mass of 10 cc piston) = 16 g (mass of 50 cc
  12. Physics

    Read the activity 2-1:Force and Pressure in the lab manual (pages 167-168). As described in the manual, consider a 10 cc syringe is connected to a 50 cc syringe. Information of the syringes are as follows: (mass of 10 cc piston) = 16 g (mass of 50 cc
  13. chem

    Consider a Carnot engine operating between the temperatures of 300. K and 189 K. Find the efficiency of this engine. Assume, now, that the isothermal step at 300. K is not reversible and the expansion takes place against a constant external pressure of
  14. chem

    For the gaseous equilibrium represented below, it is observed that greater amounts of PCl3 and Cl2 are produced as the temperature is increased. PCl5(g) <===> PCl3(g) + Cl2(g) a) What is the sign of S° for the reaction? Explain. b) What change, if
  15. chemistry

    I wanted to check my True and False Chemistry HW. I am not 100% they are correct. 1.the number of neutrons in an atom is reffered to as its atomic number False 2.the periodic table is arranged by increasing atomic number True 3.atomic number is equal to
  16. College Physics

    Dry Ice. At standard atmospheric pressure, the solid form of carbon dioxide called “dry ice” undergoes a phase change not to a liquid but straight to a gas. This process is called sublimation, and like other phase transitions heat energy is required.
  17. physics

    The drawing shows a hydraulic system used with disc brakes. The force vector F is applied perpendicularly to the brake pedal. The pedal rotates about the axis shown in the drawing and causes a force to be applied perpendicularly to the input piston (radius
  18. chemistry

    Hey guys please help me answer these chemistry questions.? 1. can a strong acid be diluted. explain in detail 2. can a weak acid be diluted. explain in detail 3. how does your observation of sunlight change when you place two different concentrations of
  19. Chemistry Equation(again!)

    Posted by chrissy on Saturday, January 6, 2007 at 1:23pm. In a lab expirement you add copper(II)nitrate to pure zinc. Write a balanced equation for this expirement and predict if a reaction will occur. For Further Reading Chemistry Equation - DrBob222,
  20. Physical Education 11-15

    11. __________ can help you reach your goals. (1 point) Eustress•• Distress A phobia A compulsion 12. Which of the following is NOT typically a stressor? (1 point) going for a walk•• missing the bus a fire alarm blaring a final exam 13. A person
  21. Science HELP!!!!

    1.To study a rock sample, geologists observe the rock's mineral, composition, color, and temperature. true false*** 2.finds a rock with layers and smaller pieces of other rocks embedded in it. the rock is most likely A igneous B sedimentary*** C
  22. Biographical Essay Evaluation (Writeacher)

    Write a 3-paragraph Biographical Essay. Discuss your experiences with summmer: the things you enjoyed and the things you missed about school. I am beginning to simplfy my writting, as Bob suggested. However, I am going to sumbit the only the first
  23. Chemistry

    A cup of teat containing 400g of liquid at 20 degrees celsius was heated. If 58.5 kj of heat was absorbed by the tea, what would the final temperature be? Assume that the specific heat of the tea is the same as that of water (4.18). I am not sure how to
  24. Physics

    A submarine has run into trouble and is stuck at the bottom of the ocean. Several people are on board and must make their way to the surface without any diving gear. The air pressure aboard the submarine is 3.100 atm. The air temperature inside the
  25. phy 111

    1 An ideal gas undergoes a cycle of processes as shown in the p-V diagram gases . Which statement correctly describes the situation? Click here to see exhibit The internal energy of the gas increases over one complete cycle Over the entire cycle, work is
  26. history

    please check in Charles Lindbergh and other heroes, Americans recognized a. a hunger for fame b. the virtues of the good old days c. a willingness to compromise d. the wildness of the American West B President Reagan's economic program was based on the
  27. College Cultural Geography

    Can someone explain what this paragraph is talking about? I do not understand it. "But Western universalism, again, has two faces: it also promotes the principles of liberty and equality throughout the world. It is not possible to proclaim global human
  28. algebra

    making linear equation from word problem An airspeed indicator on aircraft is affected by changes in atmospheric pressure at different altitudes. A pilot can estimate the true airspeed by observing the indicated airspeed and adding it about 2% for every
  29. psychology

    1. CheckPoint: Effects of Stress You are currently an associate at an advertising agency where you have worked for two years. You are pursuing a promotion to the position of advertising executive. While you have expected to put in extra hours and some
  30. Chemistry

    Can someone explain the molecular orbital theory and how to find the bond strength, bond length, and bond order? I'm also confused about the geometry of molecules & ions, like how to find the angles? (Like NH3 is 107 degrees, and H20 is 104.5 degrees, how
  31. Chemistry Help! Thank you :)

    Assuming the final solution will be diluted to 1.00 , how much more should you add to achieve the desired pH? Information: Imagine that you are in chemistry lab and need to make 1.00 L of a solution with a pH of 2.80. You have in front of you: 100 ml of
  32. Chemistry (A level)

    I was given a Chemistry question on the titration of a strong base being added to a weak acid. The question was: "Calculate the pH in a titration when 10.0cm^3 of a 0.10moldm^-3 solution of NaOH is added to a 10.0cm^3 of 0.25moldm^-3 solution of ethanioc
  33. maths

    In a class of 60 students,the number of students who passed biology is 6 more than the number who passed chemistry.Every student passed at least one of the two subjects.i.how many students passed biology ii.how many students passed chemistry iii.how many
  34. Economics

    In 1973, Members of the Oraganization of Oil-Exporting Countries (OPEC) reduced oild exports, which more than quadrupled oil prices. what effect did that have on less developed nations? a. Their development increase rapidly because if the profits they made
  35. chemistry

    Hey guys please help me answer these chemistry questions.? 1. can a strong acid be diluted. explain in detail 2. can a weak acid be diluted. explain in detail 3. how does your observation of sunlight change when you place two different concentrations of
  36. Chemistry

    Imagine that you are in chemistry lab and need to make 1.00 L of a solution with a pH of 2.70. You have in front of you * 100 mL of 6.00×10−2 M HCl, * 100 mL of 5.00×10−2 M NaOH, and plenty of distilled water. You start to add HCl to a beaker
  37. Fluid Mechanics

    Consider the 2D, incompressible, steady flow between parallel walls, the bottom wall is stationary and the top one is moving at a constant velocity Uw. The pressure is constant. Assuming the flow is fully developed (i.e. independent of x), we can write
  38. Chemistry

    Hi Dr. Bob, this is a chemistry question. I don't know how to go about solving this problem: What is the pH of the solution created by combining 11.40 mL of the 0.10 M NaOH(aq)with 8.00 mL of the 0.10 M HC2H3O2(aq)? Here's what I have so far: (0.10M
  39. Chemistry

    For a chemistry lab the experiment was to carry out an acid-base titration to determine the exact concentration of a sodium hydroxide solution. Two trials were completed and the data collected was: mass of weighing paper, mass of weighing paper + KHP, mass
  40. Chem

    Nitric acid can be prepared by bubbling dinitrogen pentoxide into water. N2O5(g) + H2O -> 2H+(aq) + 2NO3-(aq) a) How many moles of H+ are obtained when 1.50 L of N2O5 at 25 degrees C and 1.00 atm pressure is bubbled into water? b) The solution obtained
  41. Chemistry URGENT

    can someone please tell me what formula's to use for the 2 following chemistry problems. 1. Calculate the solubility of potassium bromide at 23 degrees Celsius. hint. Assume that the solubility increases by an equal amount for each degrees between 20
  42. chemistry

    I don't think there is any benzene in Elmer's glue. In fact, I suspect finding something with benzene in it will be tough to do unless you have some OLD OLD bottles of something. Its a carcinogenic thing. If you are looking for something aromatic (meaning
  43. Chemistry

    Hi, I'm trying to solve some chemistry problems, like the ones my teacher says will appear on our exams. The problem reads like this: What is the hydrogen conentration in a bleach sample that register 9.55 using a pH meter? My Attempt: Since this sample
  44. Chemistry

    Which option accurately describes how nuclear chemistry has affected society? (Select all that apply) The ability to harness the power of a nuclear fission has created a form of energy that is not dependent on fossil fuels. The use of radioactive isotopes
  45. chemistry

    To what volume should you dilute 131 mL of an 8.20 M CuCl2 solution so that 49.0 mL of the diluted solution contains 4.53g CuCl2 ? Chemistry...Help!! - Dr Russ, Wednesday, December 8, 2010 at 4:43am Molar mass of CuCl2 is 134.5 g mol^-1 so solution needs
  46. English/Psychology

    I need someone to proofread this and give me some suggestions on this paper? Do the following: "A Plan of Action". How can the A Plan of Action help you address a current problem or challenge you are having with school?” My Problem/Challenge: The Tools I
  47. chemistry -------------chemistry

    If a flame on the candle burns red , how does energy of that flame compare to that of the Bunsen burner flame ? and why ? ans:The Bunsen burner flame has higher temperature than candle’s flame . Because flame of candle emit red ,and red has the least
  48. lab chemistry

    I did a project for lab chemistry where my aim was to see which substance, from a selection of 4 chlorides, recrystallises from a solution to form the most crystals. The 4 chlorides were KCl, NaCl, MgCl2 and CaCl2. KCl and NaCl didn't form any crystals,
  49. Chemistry

    How do you calculate alkalinity in chemistry? Ex: List the values for total alkalinity for Sample A and Sample B A 104 drops of titrant (5.25mL) 3 drops of C20 H14 O4 B 81 drops of titrant (4.25mL) 3 drops od C20 H14 O4
  50. chemistry

    I need help with this question please help, I just don't understand it Fe3+ (aq), Ca2+ (aq) and Ba2+ are all present in the same solution. Fully describe a procedure whereby you could separate these ions from one another Mr Pursley posted this response,
  51. (19) Chemistry - Science (Dr. Bob222)

    Use the following information to answer this question: Cu+(aq) + e- → Cu(s) E° = 0.521V Cu2+ (aq) + e- → Cu+ (aq) E° = 0.153 V. Given these half cell reactions, an aqueous solution of Cu+ ion in the absence of O2(g) : A. will be
  52. DIVERSITY IN THE CLASSROOM update

    The social factors that most impacted the scenario I found where low income, bullying, peer pressure, parent’s expectations and role playing, and high income. I think high income is a social factor because the parents that have a high income do not seem
  53. chemistry

    home / study / questions and answers / science / chemistry / a chemical engineer studying the properties of ... Question A chemical engineer studying the properties of fuels placed 1.760 g of a hydrocarbon in the bomb of a calorimeter and filled it with O2
  54. ochem

    Calcualte how many milliliters of carbon dioxide would be produced theoretically from 20g of sucrose of 25 degree C and 1 atmosphere pressure. I can use the formula PV=nRT 20g C12H22O11 * moles sucrose/342.3g suc. that would equal: .0584 moles. But what
  55. math

    What do the lines making a circle around the low-pressure area indicate? 1.The values cannot be added because one is measuring area and the other is measuring volume. 2.The values can be added without making a conversion of units because they both measure
  56. Language Arts

    Passage A Avalanches are caused by a variety of conditions. When the temperature is cold and snow falls, the snow sticks to the ground. However, when the air temperature changes, the snow may slide away in pieces or slabs. Basically an avalanche happens
  57. Physics

    You are working as a summer intern for the Illinois Department of Natural Resources (DNR) and are assigned to some initial work on water resources project. The department will be overseeing the construction of a dam to create a large fresh water lake that
  58. Physics

    You are working as a summer intern for the Illinois Department of Natural Resources (DNR) and are assigned to some initial work on water resources project. The department will be overseeing the construction of a dam to create a large fresh water lake that
  59. science

    About a month ago I asked you a question and it was, A quantity of gas has a volume of 0.20 cubic meter and an absolute temperature of 333 degrees Kelvin. When the temperature of the gas is raised to 533 degrees Kelvin, what is the new volume of the gas?
  60. Math

    8) A consumer groups tries to determine the most expensive items in a convenience store. Four items are purchased in the convenience store and compared to the average price in stores in the area. Assume tat the price distribution is normal. Use your
  61. Earth science

    Please go over my answers and tell me what I got wrong... Telling me the correct answer would also be nice please hurry I only have 20 mins What does the principle of uniformitarianism tell us about the past? (Points: 5) The past is the key to the future.
  62. Chemistry(Please respond, thank you!)

    For the system CaO(s) + CO2(g) = CaCO3(s), I added 1.00 mol of CaO(s) to 1.00L of 0.500M CO2(g) at 200 oC. At equilibrium the [CO2] = 0.150M. What is the value of Kp for this reaction? Kp would = CaCO3/(CaO)(CO2) I do not know what to do with the 0.500M
  63. Physical Science

    1. In which of the following units is acceleration expressed? *A. Newtons B. Foot-pounds C. Kilograms D. Meters per second squared 2. A stone falls from a ledge and takes 16 seconds to hit the ground. The stone has an original velocity of 0 m/s. How tall
  64. Reposted: chemistry for Vic

    Can anyone suggest any good online/pdf exercises that will hone my skills in being able to determine the number of 1H and 13C signals in NMR spectroscopy? Answers would also be helpful. Perhaps these will help you get started.
  65. chemistry- some help plzz totally lost on this one

    Imagine that you are in chemistry lab and need to make 1.00 L of a solution with a pH of 2.70. You have in front of you * 100 mL of 7.00×10−2 M HCl * 100 mL of 5.00×10−2 M NaOH, and * plenty of distilled water. You start to add HCl to a
  66. Chemistry

    How do you get the pH 13.68 into OH^-^?
  67. Chemistry

    Did u think about it?
  68. Chemistry

    1.42 g/cm^2 to mg/mm^2
  69. Chemistry

    What does "Kc" mean?
  70. Chemistry

    Can a pH be below 1?
  71. Chemistry

    X=\MX=\MX=\M What is this?
  72. Chemistry

    Mg>Al>Ca>Rb>I
  73. chemistry

    how do i d
  74. CHEMISTRY

    10-g what does it mean?
  75. chemistry

    How many \({\rm m}^{3}\) are in 7.40 \({rm cm}^{3}\)?
  76. chemistry

    thanks!
  77. AP Chemistry

    Which value of Ke
  78. chemistry

    how many g/ml are there in 1M?
  79. Chemistry

    what is mm^2?
  80. Chemistry

    What is pH
  81. Chemistry

    How
  82. Chemistry, pH

    What is the (OH-) when pH = 4.25
  83. Chemistry

    12.
  84. chemistry

    3.5g
  85. chemistry

    what is the
  86. chemistry

    Thanks for the Help
  87. chemistry

    what is (1.2*10^2)*(8.9*10^2)
  88. chemistry

    when does 4+4=9
  89. Chemistry

    1.0 x 10^5 mL=m^3
  90. chemistry

    in chemistry what is aq
  91. Chemistry

    Good morning. I need help solving 2 problems for chemistry. For #1 I need someone to check my work and tell me if I did it wrong and show me how and where I went wrong. And for #2 I need someone to help me figure out how to solve it and explain. 1. With
  92. CHemistry....Please help...DrBobb

    I posted this up yesterday: I have to use the equation : density= mass/ volume: But i don't know how to find out the volume using the edge length of the unit cell which is 5.88* 10^2 pm. CHemistry....Please help - DrBob222, Sunday, January 25, 2009 at
  93. chemistry

    what is the atomic number of ununhexium and the full symbol is this a transitional element that is a metal and what is its highest hydride and highest fluoride of ununhexium thanks What is known about Uuh can be found here. Look for element number 116. Go
  94. History

    John Brown, supported by abolitionists and Republicans, tried to start a slave revolt. Therefore be it resolved that the defense of slavery is a common cause to all Southern states. At the call of any Southern state, we are authorized to send troops and
  95. us history

    John Brown, supported by abolitionists and Republicans, tried to start a slave revolt. Therefore be it resolved that the defense of slavery is a common cause to all Southern states. At the call of any Southern state, we are authorized to send troops and
  96. science

    At 472 deg C the reaction reaches equilibrium with the following composition: [H2]=7.38atm, [N2]=2.46atm, [NH3]=0.166atm. Into the equilibrium mixture 1.5 atm of N2 is introduced: a. Calculating Kp and Q, determine in which direction the reaction will
  97. chemistry

    Table of enthalpy of solution for selected cesium salts Compound and ΔsolH kJ mol-1: - Cesium bromide: 25.98 - Cesium iodide: 33.35 - Cesium chloride: 17.78 - Cesium fluoride monohydrate: -10.46 - Cesium fluoride sesquihydrate (·1.5H2O): -5.44 Data
  98. chemistry help!

    I have a chemistry test tomorrow and I'm trying to study but none of these questions in the book make sense to me:( Help! 1. Commericially available concentrated sulfuric acid is 95% H2SO4 by mass and has a density of 1.84g/mL. How many milliliters of this
  99. cHEMISTRY

    wHAT IS THE SYMBOL FOR THE ION WITH 13 PROTONS AND TEN ELECTRONS? CAN U EXPLAIN HOW TO GET YOUR ANSWER, AND CAN YOU GIVE ME A WEBSITE THAT HELPS ME WITH CHEMISTRY 13 protons will be element with atomic number of 13. Look on the periodic table and see
  100. Chemistry

    I need serious help with 3 different chemistry problems: 1. If coal is assumed to be all carbon, carbon has a molecular weight of 12 lb-mass/lb-mol, and oxgyen (diatomic) has a molecular weight of 32 lb-mass/lb-mol, how much carbon dioxide (lb-mass/day) is