osmotic pressure chemistry

64,562 results, page 41
  1. physical chemistry

    Calculate the equilibrium constant (K) for the ammonia synthesis reaction at 25°C and show how K is related to the partial pressures of the species at equilibrium. Consider that the overall pressure is low enough for the gases to be treated as perfect.
  2. Chemistry

    I havent been at school for 8 days due to somthing wrong with my heart, but the teachers gave me work. I have no clue how to do them. I really need help please, There all due tomarrow. Determine the density of chlorine gas at 22C and 1.00 atm pressure.
  3. ap chemistry

    Use the Clausius-Clapeyron equation to cal- culate the temperature at which pure water would boil at a pressure of 434 torr. The heat of vaporization of water is 41276 J/mol at 100C. Answer in units of C
  4. Chemistry

    a 9.85 g sample of an unknown metal M is burned in the presence of excess oxygen, producing the oxide M2O3 (s) and liberating 57.8kJ of heat at constant pressure. What is the identity of the metal? 4M(s) + 3O2(g) yields 2M2O3(s)
  5. Chemistry

    excess magnesium is reacted with 45 grams of sulfuric acid. 9.5 liters of hydrogen gas are collected understand conditions of temperature and pressure. what is the percentage of hydrogen sulfate and of water in the acod solution?
  6. Chemistry

    A 10.0 mL sample of 12.1 M hydrochloric acid is added to 90.0 mL of distilled water and added to a sealed 1.04 L reaction vessel containing 1.463 g of calcium hydrogencarbonate at 22.1ºC and 743 mmHg. What is the pressure of carbon dioxide gas?
  7. Chemistry- Dr. Bob222

    Methanol (CH3OH) is a colorless volatile liquid, formerly known as wood alcohol. It boils at 65.0 °C and has a heat of vaporization ΔHvap = 37.4 kJ/mol. What is methanol’s vapor pressure at 22.0 °C? My answer: 109.5 torr
  8. Chemistry

    A sample of oxygen is in a 570 L balloon at 118.8 kPa. What is the volume of the balloon, in litres (to 1 decimal place, input value only) if the pressure is changed to 1.359 atm? Assume that the temperature remains constant.
  9. physical chemistry

    In an experiment, at a total pressure of 10atm and 400 degree celcius, the equilibrium mixture 2NH3=N2+3H2 the ammonia was found to have dissociated to the extent of 96%. Calculated Kp for the rxn. (reversible rxn).
  10. chemistry

    calculate the molar mass of an unknown whose mass was 0.846 g, and occupied a volume of 354 cm3 at a pressure of 752 torr and a temperature of 100 degrees celcius. I came up with .0114 moles, I want to know if this is correct.
  11. chemistry

    One reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s) + 2HCl(aq) → FeCl2(aq) + H2(g); ΔH°= –87.9 kJ How much heat is liberated at constant pressure if 0.416 g of iron reacts with 42.0 mL of
  12. Chemistry

    Can someone check these answers for me THANK YOU! 1) Which of the following combinations would most increase the solubility of a gas in a liquid? is it increase the pressure and increase the temperature 2) The concepts of molarity and molality are like in
  13. Chemistry

    Assume that the width of your body (across your shoulders) is 50.8 cm inches and the depth of your body (chest to back) is 25.0 cm. If the atmospheric pressure is 14.9lb/in^2, what mass of air (lb) does your body support when you are in an upright
  14. Physics -I'm stumped

    Europa, a satellite of Jupiter, appears to have an ocean beneath its icy surface. Proposals have been made to send a robotic submarine to Europa to see if there might be life there. There is no atmosphere on Europa, and we shall assume that the surface ice
  15. Chemistry

    What would be the pH of a soda water made by saturating pure water with pure CO2 at 1 atm pressure?
  16. chemistry

    A sample of gas has an initial volume of 2.80 L at 755 torr. If the volume of the gas is increased to 3.70 L, what will the pressure be?
  17. chemistry

    A sample of gas has an initial volume of 2.80 L at 755 torr. If the volume of the gas is increased to 3.70 L, what will the pressure be?
  18. Chemistry

    Consider a 790-mL container at 21 °C in which the pressure of argon is 1.98x106 Pa. a) What mass of argon (in g) is present in this container? b) How many molecules is this?
  19. chemistry

    A 2.0 liter balloon at a temperature of 25°C contains 0.1 mol of oxygen and 0.4 mol of nitrogen. What is the partial pressure of nitrogen?
  20. chemistry

    The equation for the best-fit function through the points on the graph below is y = 5x-1. We can tell from this equation and the graph that volume and pressure are __________.
  21. chemistry

    a 30. L sample of gas exerts 200. mm Hg pressure at 10 degrees C. What volume does the gas have at 300. mm Hg and 25 degrees C?
  22. Chemistry

    If the sign contains neon at a pressure of 1.72 torr at 32 C, how many grams of neon are in the sign? (The volume of a cylinder is pie r2 h.)
  23. chemistry

    The temperature of a 4.00 L sample of gas is changed from 10.0 C to 20.0 C. What will the volume of this gas be at the new temperature if the pressure is held constant?
  24. chemistry

    a 30. L sample of gas exerts 200. mm Hg pressure at 10 degrees C. What volume does the gas have at 300. mm Hg and 25 degrees C?
  25. Chemistry

    Why the vapor pressure of water and ethanol is 760 mm of Hg at 100 degree Celsius and 78.5 degree Celsius respectively ?
  26. Chemistry

    50 liters cylinder is filled with Ar gas to a pressure of 10130KPa at 30C. How many moles of At gas are in the cylinder
  27. Chemistry

    A sample of gas has a volume of 8.1 liters at 1 atmosphere pressure and 203.0 K. What is its volume (liters) at STP?
  28. Chemistry

    How many gas particles occupy a volume of 22.4 L at standard temperature and pressure? One mole of gas particles.
  29. chemistry

    calculate the water vapor pressure of benzene at 0.80, 0.60, 0,40, and 0.20 mole fraction and toluene at 0.20, 0.40, 0.60, and 0.80 mole fraction.
  30. chemistry

    SO2 (5.00 g) and CO2 (5.00 g) were placed in a 750.0 mL container at 50.0 °C. The partial pressure of CO2 in the container was __________ atm.
  31. chemistry

    the helium in a 1.5L flask at 25degrees celcius exerts a pressure of 56.65kPa. How many moles of helium are in the flask?
  32. Math

    I'm having trouble with a math problem, it says: 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 degress kelvin, what is the new volume of the gas? Thank
  33. Physics

    An automobile tire contains a certain volume of air at 30 psig and 70 °F. The barometric pressure is 29.50 Hg. If due to running conditions, the temperature of air in the tire rises to 160 °F. What will be the gauge pressure? Assume that air is an ideal
  34. chem

    A typical fluorescent light bulb contains argon gas and mercury vapor.? a. If the total gas pressure in a fluorescent light bulb is 307.1 Pa and the partial pressure of the argon gas is 306.0 Pa, what is the partial pressure of the mercury vapor? b. If a
  35. Physics-Sound Waves

    I'm not sure how to go about answering this question... I have all these equations and none seem to apply. The question is: If you have two speakers on opposite sides of a concert stage producing identical sound waves with a wavelength of .8m. If you
  36. Chemistry

    a) An equilibrium exists between three chemical species in the blood , Hemoglobin, oxygenated hemoglobin and oxygen. Using the symbols Hb for hemoglobin , O2 for oxygen and HbO2 for oxygenated hemoglobin write out the equilibrium reaction. If you have
  37. Chemistry

    A sample of H2 gas occupies a volume of 565 mL at STP. What, volume, in mL, will this sample of H2gas occupy at a temperature of -17oC and at a pressure of 0.560 atm
  38. chemistry

    How many grams of oxygen are collected in a reaction where 245 mL of oxygen gas is collected over water at a temperature of 25 ^\circ {\rm C} and a total pressure of 688 torr
  39. Chemistry

    If 0.5000grams of barium carbonate was reacted with 25.0mLs of 0.15M nitric acid and the gas then collected in 100mL flask at 77°C, what is the gas pressure in the flask?
  40. Chemistry

    A 1.44-g sample of an unknown pure gas occupies a volume of 0.336 L at a pressure of 1.00 atm and a temperature of 100.0 degrees Celsius. What is the unknown gas?
  41. AP Chemistry

    a 6.33-Liter football is filled with air at 1.75 atm at 25.5 degrees Celcius. At the same temperature, the volume of the football is reduced to 2.35 Liters. What is the pressure of air in the ball?
  42. Chemistry

    A sample of nitrogen gas at 298 K and 745 torr has a volume of 37.42 L. What volume will it occupy if the pressure is increased to 894 torr at constant temperature?
  43. Chemistry

    Room temperature is often assumed to be 25 Celsius. Calculate the molar volume of an ideal gas at 25 Celsius and 1 atm pressure. Answer is 24.5L, Im trying to figure out how they got the answer. Help??
  44. Chemistry

    A sample containing 4.80g of O2 gas has a volume of 15.0L. Pressure and temperature remain constant. What is the new volume if 0.500 mole of O2 gas is added? Am I converting the 4.80 O2 into moles first? How do I do that?
  45. Chemistry (Check)

    A container holds 500. mL of CO2 at 20. degrees C and 742 Torr. What will be the volume of the CO2 if the pressure is increased to 795 Torr? Vf = .465 L
  46. AP Chemistry

    How much work is done by the system when 2.00 moles of O2 expand from a volume of 3.00 liters to a volume of 8.5 liters against a constant external pressure of 0.0100 atm? Answer in units of J.
  47. chemistry

    The standard molar heat of fusion of ice is 6020 J/mol. Calculate q, w, and ∆E for melting 1.00 mol of ice at 0◦C and 1.00 atm pressure.
  48. chemistry

    Consider a gas that has a molar mass of 100.21 g/mol. What mass of this gas would occupy a 150 mL container under a pressure of 1.00 atmosphere and a temperature of 25 degrees centegrade?
  49. chemistry

    Consider a gas that has a molar mass of 100.21 g/mol. What mass of this gas would occupy a 150 mL container under a pressure of 1.00 atmosphere and a temperature of 25 degrees centegrade?
  50. Chemistry

    Consider a gas that has a molar mass of 100.21 g/mol. What mass of this gas would occupy a 150 mL container under a pressure of 1.00 atmosphere and a temperature of 25 degrees centegrade?
  51. chemistry

    the gaseous product of a reaction is collected in a 25.0-L container at 27degree celcious. the pressure in the container is 300 kPa and the gas has a mass of 96.0g. what is the molar mass
  52. ap chemistry

    How much work is done by the system when 2.00 moles of O2 expand from a volume of 3.00 liters to a volume of 8.1 liters against a constant external pressure of 0.0100 atm? Answer in units of J
  53. chemistry

    a 2.00 L ballon at 25 degrees celcius and 745mmHg floats on an altitude where the temperature is 10 degrees celcius and the air pressure is 700mmHg. what is the new volume othe balloon
  54. Chemistry

    Some hydrogen is collected over water at 10 degrees C and 105.5 kPa pressure. The total volume of the sample was 1.93 L. Calculate the volume of the hydrogen or reacted to STP.
  55. Chemistry

    Equal weights of methane and hydrogen are mixed in an empty container at 25 C. the fraction of total pressure exerted by the hydrogen is? answer is 1/9 i want to know that how to find out this answer thanks?
  56. Chemistry

    Determine the partial pressure of oxygen necessary to form an aqueous solution that is 7.7 x 10-4 M O2 at 25oC. The Henry's Law Constant for oxygen in water at 25oC is 1.3 x 10-3 M/atm
  57. chemistry

    calculate the vapor pressureof a solution of 20.0g sucrose (C12H12O6) in 80.0g water at 25 degrees celsius (vapor pressure, P, of pure water at 25C is 24torr)
  58. chemistry 1B

    A sample of gas occupies a volume of 61.2 mL. As it expands, it does 133.9 J of work on its surroundings at a constant pressure of 783 torr. What is the final volume of the gas.
  59. Chemistry 105

    An experiment shows that a 114 mL gas sample has a mass of 0.168 g at a pressure of 697mmHg and a temperature of 30 C. What is the molar mass of the gas? in g/mol
  60. chemistry

    At standard temperature, a gas has a volume of 312 mL. The temperature is then increased to 115◦C, and the pressure is held constant. What is the new volume? Answer in units of mL
  61. Chemistry

    A 1.44-g sample of an unknown pure gas occupies a volume of 0.336 L at a pressure of 1.00 atm and a temperature of 100.0 degrees Celsius. What is the unknown gas?
  62. chemistry

    On average, how far is a molecule of air in the room in which you're sitting from the nearest molecule of air to it, assuming it is an ideal gas. Make appropriate assumptions about the temperature and pressure.
  63. Physical Chemistry

    Calculate the pressure and temperature at which 1.00 mole of CO gas will be in the same corresponding state as 1.00 mole of H2 gas at 2.00 bar and 30.0 degrees celsius. Use any critical constants necessary for both gases.
  64. Chemistry

    SHOW WORK A 44g sample of CO2 has a volume of 22.4 L at STP. The sample is heated to 71 degrees Celsius and compressed to a volume of 18.0 L. What is the resulting pressure?
  65. Chemistry

    A gas occupies a volume of .350 L at a temperature of 18.0 degrees Celsius and a pressure of 980.0 torr. What will be the volume of this gas at standard conditions? Please explain how to do it.
  66. chemistry

    If you filled up three balloons with equal volumes of hydrogen, argon, and carbon dioxide gas all at the same temperature and pressure, which balloon would weigh the most? which balloon would weigh the least?
  67. Chemistry

    The standard molar heat of fusion of ice is 6020 J/mol. Calculate q, w, and (delta) E for melting 1.00 mol of ice at 0 deg. C and 1.00 atm pressure.
  68. chemistry

    an ideal gas in a sealed container has an initial volume of 2.70L. at constant pressure, it is cooled to 25.00 C where its final volume is 1.75L. what was the initial temperature?
  69. chemistry

    In a gas mixture, the partial pressures are argon 393 mm Hg, neon 73 mm Hg, and nitrogen 119 mm Hg. What is the total pressure (atm) exerted by the gas mixture?
  70. chemistry

    a sample of argon gas at standard pressure ocupies 100ml. at constant temp, what volume does the gas occupy if the temp increases to 800mmHg
  71. chemistry

    If 1.000 kcal of heat is added to 1.700 L of oxygen in a cylinder at constant pressure of 1.00 atm, the volume increases to 2.100 L. Calculate the total energy change for this process. Pay careful attention to units. Some plz help me :(
  72. Physics

    A storm approaches and the air pressure outside your apartment suddenly drops to 0.960 ✕ 105Pa from 1.013 ✕ 105Pa. Before the pressure inside your apartment has had time to change, what is the magnitude of the net force exerted on a window
  73. ALGEBRA

    the atmosphere pressure P in pounds per square inch (psi) is given by P=14.7e upper o.21a where a is the attitude above sea level in miles. If a city has an atmosphere pressure y 13.29 psi what is its altitude. Recall that one mile = 5,280 feet. Round to
  74. physical science

    If the absolute pressure of a gas is 550.280 kPa, its gage pressure is A. 101.325 KPa B. 277.280 KPa C. 448.955 KPa D. 651.605 Kpa
  75. Physics (Liquids)

    Hi! Ok P = Po + (greek lowercase letter Ro)gh pressure = atmospheric pressure + density of fluid(gravity)(pressure head) I derived it using calculus and followed along in the book the book assuems in ther derivation that it's a solid cylinder that sits
  76. Chemistry

    I need to determine the "percentage composition unknown" whatever that is. My current data: a) mass of test tube and foil cover: 7.5323 g b)temp of water bath: 375.65 K c) mass of test tube and foil and gas as sample: 7.5423 g d) barometric pressure:
  77. physics

    A sealed tank containing seawater to a height of 11.0 m also contains air above the water at a gauge pressure of 3.00 atm. Water flows out from the bottom though a small hole. Calculate the speed with which the water comes out of the tank. I believe this
  78. Biology

    Supposing you have a renal stenosis, what kind of affect does that have on the heart. What I do know: - decreased flow to the kidneys - kidneys assumes that overall blood volume have decreased - RNN system is activated - = increase in blood pressure
  79. Science

    Proteins found on the outside of cells and viruses are called ____________ , these are used by the body to _______________ pathogens. antigens; help antibodies; make antigens; identify antibodies; reproduce Identify the response below that summarizes the
  80. Chemistry

    Use the following information to identify element A and come pound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of 659.452 g after it has been filled with nitrogen gas at a pressure of 790. torr and a
  81. Physics

    An oxygen tank of volume V is stored in a medical laboratory. Initially, the tank is full of compressed oxygen at pressure p_{0} . Lab regulations require a refill when the pressure in the tank drops to p_{2} so as to avoid contaimination by impure gas.
  82. chemistry

    When a sample of carbon dioxide gas is at 36 degrees and 105 kpa is heated the new pressure of the gas becomes 165kpa. Determine the new temperature. Assume volume and amount of gas remain constant.
  83. Chemistry

    Using data below, calculate the vapour pressure (in torr) of liquid bromine at 72.3°C. Assume that ΔHo and ΔSo do not vary with temperature. Express your answer in scientific notation. Br2(l) -> Br2(g) Br2(l) ΔHfo= 0 kJ/mol
  84. Chemistry

    An "empty" container is not really empty if it contains air. How may moles of nitrogen are in an "empty" two-liter cola bottle at atmospheric pressure and room temperature (25 degrees celcius)? Assume ideal behavior.
  85. physics

    At a pressure 48 kPa, the gas in a cylinder has a volume of 15 liters. Assuming temperature remains the same, if the volume of the gas is decreased to 8 liters, what is the new pressure?
  86. math

    The pressure exerted on a surface is the ratio of the force on the surface to its area. Find the pressure on a patch, 2.25 m square, on a tank if the force on the patch is 37.4 N.
  87. (chem) this will make me or break me :(

    1.If the pressure of the gas in a 2.31 L balloon is 0.120 atm and the volume increases to 7.14 L, what will be the final pressure of the air within the balloon? Round to the nearest hundredth. Don't forget the units. 2.At a pressure of 2 atm, hydrogen gas
  88. Chemistry

    what volume of oxygen at 423.0K and a pressure of 127.4kPa will be produced by the decomposition of 129.7g barium peroxide to form barium oxide and oxygen gas? Thank you
  89. chemistry 106

    Calculate the work done if a gas is compressed from 8.3 L to 3.3 L at constant temperature by a constant pressure of 3.0 atm, and give your answer in units of joules. (1 L · atm = 101.3 J)
  90. Chemistry

    A Mylar Happy Birthday balloon contains 5.15 L of helium gas at 19.4oC. If the pressure remains constant, what will be the volume of helium in the balloon, in L, when the temperature is increased by 6.6oC?
  91. chemistry

    9. The reaction of 50 mL of N2 gas with 150 mL H2 gas to form ammonia via the equation: N 2(g) + 3H2 (g) → 2NH3 (g) will produce a total of mL of ammonia if pressure and temperature are kept constant
  92. Chemistry

    1.50 liters tank filled with helium at 125 atm is used to fill balloons. The pressure in each balloon is 950 torr and the volume of each is 1.20 liters. How many ballons can be filled?
  93. chemistry

    determine the number of grams of Ne gas that must be added to a container in order for the volume to increase to 38.2 L at constant pressure and temperature if the container had an initial volume of 25.0 L and 2.0 moles of Ne
  94. chemistry

    If 0.45 mol of neon gas occupies a volume of 789 mL at a certain temperature and pressure, what volume would 0.376 mols of neon occupy under the same conditions? what Law is used to solve?
  95. chemistry

    A 200-mL sample of Oxygen gas is collected at 26 degrees C and a pressure of 690 torr. What volume will the gas occupy at STP (0 degree C and 760 torr)
  96. chemistry

    a sample of gas has a volume of 12liters at 0 degrees celcius and 380 torr. what will be its volume whent the pressure is changed to 760 torr at a constant temperature?
  97. chemistry

    Henry's law constant for N2 and O2 is 1.6 *10^-6and 8.77*10^-7 molal/mm Hg at 298k.Air has 78 mole percentage N2 and 21 mole percentage O2.at atmospheric pressure the ratio of solubility of N2 and O2 in water is?
  98. chemistry

    The pressure exerted on a 240. mL sample of hydrogen gas at constant temperature is increased from 0.428 atm to 0.724 atm. What will the final volume of the sample be?
  99. chemistry

    The new vapor pressure of a solution of 3.25g of an unknown compound in 22.35g of H2O is 114.9mmHg at 55 degrees Celcius. What is the molar mass of the unknown compound?
  100. Chemistry

    Assuming that temperature remains constant, calculate the final volume Pressure of a sample of 45 L of gas is increased and the gas goes from 100 kPa to 125 kPa;