osmotic pressure chemistry

10,949 results, page 21
  1. Chemistry-Gas Laws

    At 0 degrees celcius, a 1.0 L flask contains 5.0 x 10^-2 mol N2, 1.5 x 10^2 mg O2, 5.0 x 10^21 molecules NH3. Calculate the partial pressure of each gas and what is the total pressure in the flask. How do I calculate this?
  2. Chemistry

    Calculate the normal boiling point of a compound that has a vapor pressure of 19.30kPa at 167 Fahrenheit and a vapor pressure of 1.86kPa at 77 Fahrenheit.
  3. physics- vry urgent

    An ideal monatomic gas initially has a temperature of 333 K and a pressure of 7.15 atm. It is to expand from volume 581 cm3 to volume 1360 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If,
  4. physics

    An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If,
  5. physics

    An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If,
  6. physics

    An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If,
  7. Science

    Hello, I just started my chem class today and I am totally stuck on this question: Hurriance Katrina had the 2nd lowest ever recorded barometric pressure at 0.920 mb. Convert this pressure to units of… a. atmospheres. b. Inches of Hg. I know i need to
  8. CHEMISTRY

    after starting with 0.343g Al and excess HCl the volume of H2 gas collected over water was 472ml. the atmospheric pressure was 754 mmHg and the temp was 21c. 1 balanced chemical equation? 2calculate the pressure in atm of dry hydrogen gas in a mixture
  9. physics. PLEASE HELP

    Where do I start? Calculate the water pressure at the bottom of the 50-m {\rm m}-high water tower shown in the photo. Express your answer to two significant figures and include the appropriate units. The question says to neglect the pressure due to
  10. chemistry

    How will the following system at equilibrium shift in each of the following cases? 2 SO3(g) 2 SO2(g) + O2(g) H° = 197 kJ (a) SO2(g) is added (b) the pressure is decreased by increasing the volume of the container (c) the pressure is increased by adding
  11. Chemistry

    I need help calculating the partial pressure of H2 using the following information 0.028 g Mg with excess HCl which produced 31.0 mL of H2 gas. The gas was collected by water displacement in a 22 degrees Celsius water bath. The pressure was 746 mmHg.
  12. Physics

    for every 10 m you descend below the surface of water, the pressure on you will increase by an amount equal to atmospheric pressure 101kpa. an air bubble in a lake has a volume of 20 mm^3 at a depth of 40m. predict what volume it will have just before
  13. physics

    The SYSTOLIC pressure in a major artery is measured at 115 mmHg. What is the net force on a 1 cm2 section of the artery wall if the absolute pressure in the tissue outside the arterial wall is 108.6 kPa?
  14. physics

    The SYSTOLIC pressure in a major artery is measured at 115 mmHg. What is the net force on a 1 cm2 section of the artery wall if the absolute pressure in the tissue outside the arterial wall is 108.6 kPa?
  15. chemistry

    What is the effect of the following on the separation of the mixture(hexane and toluene)? a. A soluble, nonvolatile impurity b. a decrease in barometric pressure c. an increase in barometric pressure d. rapid heating rate separation technique is
  16. chem

    The decomposition of sulfuryl chloride (SO2Cl2) is a first-order process. The rate constant for the decomposition at 660 K is 4.5 10-2 s-1. (a) If we begin with an initial SO2Cl2 pressure of 425 torr, what is the pressure of this substance after 74 s? what
  17. chemistry

    1.Vapor pressure is the pressure exerted by a vapor when condensation A. < B. = C. > evaporation over its liquid in a closed system. 2.Evaporation is an A. endothermic B. exothermic process, because when a substance evaporates it must A. absorb B. release
  18. chemistry

    when 2g of a gas A is introduced into an evacuated flask kept at 25 centigrade, the pressure is found to be 1 atmosphere.if 3g of another gas is then added to the same flask, the total pressure becomes 1.5atm. assuming ideal behaviour, the ratio of their
  19. Physics

    The lowest pressure attainable using the best available techniques is about 10^-12 N/m^2. At such pressure, how many molecules are there per cm^3 at 0 degrees C. I know that PV= nRT and that you solve for n/v = P/RT. I have also converted from N/m^2 to atm
  20. Need help asap**

    The oxygen gas emitted from an aquatic plant during photosynthesis is collected over water at a temperature of 25 degrees celsius and a total pressure of 762 torr. What is the partial pressure of the oxygen gas? What formula do I need to use?
  21. Chemistry

    SHOW WORK A cylinder contains 36.5g of argon gas at a pressure of 8.20atm. The valve is opened and gas is allowed to escape until the pressure is reduced to 4.75atm at constant temperature. How many grams of argon escaped?
  22. Chemistry

    A Gaseous mixture contains 4.08g of oxygen and 2.78g of Nitrogen a)What pressure is exerted by the mixture inside a 100.0ml metal container at 150C. b) what pressure is contributed by the oxygen? (please show steps)
  23. Chemistry...

    The oxygen gas emitted from an aquatic plant during photosynthesis is collected over water at a temperature of 25 degrees celsius and a total pressure of 762 torr. What is the partial pressure of the oxygen gas? What formula do I need to use?
  24. physic

    four moles of gas are contained in 2 litre vessel at the temperature of 200c at a pressure of 10atm.the gas is allowed to expand to anew volume of a 4litres ,but at the same time maintening the original temperature.what is the new pressure?
  25. Chemistry

    According to the ideal gas law a 9.03 sample of oxygen gas in a 0.8112 container at 499k should exert a pressure of 456atm. By what % does the pressure calculated using van der waals equation differ from the ideal pressure? For O2 gas a=1.36 L^2atm/mol2
  26. Physics Question

    Here is a demonstration Pascal used to show the importance of a fluid's pressure on the fluid's depth : An oak barrel with a lid of area 0.17 m^2 is filled with water. Along, thin tube of cross-sectional area 4.7×10−5 m^2 is inserted into a hole at the
  27. algebra

    The volume of a gas varies directly with its temperature and inversely with the pressure. If the volume of a certain gas is 20 cubic feet at a temperature of 350K and a pressure of 35 pounds per square inch, what is the volume of the same gas at 330 K when
  28. Chemistry

    I really don't get this. The calculations shown don't make sense. Demonstrate that work is not a state function by calculating the work involved in expanding a gas from an initial state of 1.00: and 10.0atm of pressure to (a) 10,0 L and 1.0 atm pressure.
  29. AP Chemistry

    Small quantities of hydrogen gas can be prepared in the laboratory by the addition of aqueous hydrochloric acid to metallic zinc. Zn(s)+2HCl(aq) -> ZnCl2(aq)+ H2(g) Typically, the hydrogen gas is bubbled through water for collection and becomes saturated
  30. physics

    a pond of water filled with water apto 60m. 1)write formulato find the pressure of water exerted on the base of pond. 2)calculate the pressure exerted by the water on the base of pond?density of water is 1000kg/m3 3)half of the water was removed from the
  31. physics,plz.....give me answer as soon as possible

    a pond of water filled with water apto 60m. 1)write formulato find the pressure of water exerted on the base of pond. 2)calculate the pressure exerted by the water on the base of pond?density of water is 1000kg/m3 3)half of the water was removed from the
  32. chemistry

    Captain Kirk, of the Starship Enterprise, has been told by his superiors that only a chemist can be trusted with the combination to the safe containing the dilithium crystals that power the ship. The combination is the pH of Solution A described below,
  33. Physics

    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
  34. physics

    A horizontal segment of pipe tapers from a cross sectional area of 50 cm2 to 0.5 cm2. The pressure at the larger end of the pipe is 1.26 105 Pa and the speed is 0.029 m/s. What is the pressure at the narrow end of the segment? Pa Please help! physics -
  35. Physics

    A horizontal segment of pipe tapers from a cross sectional area of 50 cm2 to 0.5 cm2. The pressure at the larger end of the pipe is 1.26 105 Pa and the speed is 0.029 m/s. What is the pressure at the narrow end of the segment? Pa Please help! physics -
  36. Physics

    A horizontal segment of pipe tapers from a cross sectional area of 50 cm2 to 0.5 cm2. The pressure at the larger end of the pipe is 1.26 105 Pa and the speed is 0.029 m/s. What is the pressure at the narrow end of the segment? Pa Please help! physics -
  37. Chemistry!

    10.2 g of Pb(NO3)2 are dissolved in 100 mL of water, and added to 250.0 mL of a 0.250 M solution of KI. Determine the mass in grams of Pbl2 produced, and find the number of moles of the excess reagent. PLZ explain chemistry - DrBob222, Monday, December 13,
  38. Phase

    http://en.wikipedia.org/wiki/Melting_point Question: A solid substance has a vapor pressure of 100 mmHg at the melting point (100C). Assuming an atmospheric pressure of 760 mmHg, describe the behavior of this solid as the temperature is raised from room
  39. chemistry

    Glycerin (C3H8O3) is a nonvolatile liquid. What is the vapor pressure of a solution made by adding 180. g of glycerin to 321 mL of H2O at 39.8°C? The vapor pressure of pure water at 39.8°C is 54.74 torr and its density is 0.992 g/cm3.
  40. science

    3. Atmospheric pressure at the top of Mt. Everest is about 150 mm Hg. That is why climbers always bring oxygen tanks. If a climber carries a 12.0 liter tank with a pressure of 35,000 mm Hg, what volume will the gas occupy if it is released at the top of
  41. Physics

    What is the normal pressure of the atmosphere at the summit of Mt. Everest, 8850m above sea level? (Assume g is constant and that the density of air, ρ, is proportional to the pressure, P, at any height. Use the values at sea level ρ0 = 1.29kg/m3 and P0
  42. physics

    A diesel engine takes in 0.5 moles of air at 20.0„aC and at atmospheric pressure. It then compresses it adiabatically to one twentieth of its original volume. Obtain the final temperature, pressure and volume of the compressed air? which formula should i
  43. PHYSICS

    A piece of aluminum (bulk modulus 7.1 x 1010 N/m2) is placed in a vacuum chamber where the air pressure is 0.307 x 105 Pa. The vacuum pump is then turned on and the pressure is further reduced to zero. Determine the fractional change V/V0 in the volume of
  44. Chemistry

    find the dry volume at STP of 500 mL of nitrogen gas measured over water at 15 degree C and 680 mmHg. the water vapor exerts a partial pressure of 12.8 torr at this temperature ( vapor pressure).
  45. science

    3. Atmospheric pressure at the top of Mt. Everest is about 150 mm Hg. That is why climbers always bring oxygen tanks. If a climber carries a 12.0 liter tank with a pressure of 35,000 mm Hg, what volume will the gas occupy if it is released at the top of
  46. Heat transfer

    For a sample of air having 22 degC DBT, relative humidity 30 % at barometric pressure of 760 mm of mercury, calculate the vapour pressure,humidity ratiio,dew point temperature,vapour density,and enthalpy
  47. Statistics

    Topic: Normal Probability Distribution Question: Assume that blood pressure readings are normally distributed with a mean if 116 and a standard deviation of 4.8. If the 36 people are randomly selected, How do I find the probability that their blood
  48. Calculus

    Air expands adiabatically in accordance with the law PV^1.4=Const. If at a given time the volume is 14 cubic feet and the pressure is 40 pounds per square inch, at what rate is the pressure changing when the volume is decreasing 1 cubic foot per second?
  49. chemistry

    Glycerin, C3H8O3, is a nonvolatile liquid. What is the vapor pressure of a solution made by adding 164 g of glycerin to 325 mL of H2O at 39.8°C? The vapor pressure of pure water at 39.8°C is 54.74 torr and its density is 0.992 g/cm3.
  50. Physics

    A weather ballon is designed to expand to a maximum radius of 20 m at its working altitude, where the air pressure is 0.030 atm and the temperature is 200 K. If the ballon is filled at atmospheric pressure and 300 K, what is its radius at liftoff?
  51. Physics

    A weather ballon is designed to expand to a maximum radius of 20 m at its working altitude, where the air pressure is 0.030 atm and the temperature is 200 K. If the ballon is filled at atmospheric pressure and 300 K, what is its radius at liftoff?
  52. physics

    Your town is installing a fountain in the main square. If the water is to rise 20 m above the fountain, how much pressure must the water have as it moves slowly toward the nozzle that sprays it up into the air? Assume atmospheric pressure equal to 100,000
  53. physics

    The balloon contains 0.30 {\rm mol} of helium starts at a pressure of 115 {\rm kPa} and rises to an altitude where the pressure is 55.0 {\rm kPa}, maintaining a constant 300 {\rm K} temperature. (A)By what factor does its volume increase? (B)How much work
  54. physics

    The balloon contains 0.30 mol of helium starts at a pressure of 125 kpa and rises to an altitude where the pressure is 55.0 kpa, maintaining a constant 300 {\rm K} temperature. A)By what factor does its volume increase? B)How much work does the gas in the
  55. chemistry

    A 10.0 g sample of carbon monoxide, a poisonous gas produced by the incomplete combustion of hyrdocarbons, occupies 15.0 l at a pressure of 200 kpa. the volume occupied by the carbon monoxide when the pressure is increased is 700 pka is a) 1.16 L b)4.05 L
  56. chemistry

    A 10.0 g sample of carbon monoxide, a poisonous gas produced by the incomplete combustion of hyrdocarbons, occupies 15.0 l at a pressure of 200 kpa. the volume occupied by the carbon monoxide when the pressure is increased is 700 pka is a) 1.16 L b)4.05 L
  57. physical science

    3. Atmospheric pressure at the top of Mt. Everest is about 150 mm Hg. That is why climbers always bring oxygen tanks. If a climber carries a 12.0 liter tank with a pressure of 35,000 mm Hg, what volume will the gas occupy if it is released at the top of
  58. Chemistry

    If the equilibrium constant K equals .05, and the reaction C3H8=C3H6 + H2 (all gases), starts with pure C3H8 and is allowed to reach equilibrium at 200 K at a total pressure of 2 bar. Calculate the partial pressure of H2 at equilbirum.
  59. physical science

    3. Atmospheric pressure at the top of Mt. Everest is about 150 mm Hg. That is why climbers always bring oxygen tanks. If a climber carries a 12.0 liter tank with a pressure of 35,000 mm Hg, what volume will the gas occupy if it is released at the top of
  60. Maths

    In a class of 60students,the number of student passed Biology is 6 more than the number of student passed Chemistry,8 student passed both subject.How many student passed Biology,how many student passed Chemistry,how many student passed only one subject?
  61. Chemistry

    Posted by Angeline on Monday, April 20, 2009 at 5:35pm. A few questions...how many grams are in 48.7x10^24? I don't know how to convert atoms to grams. I can do moles to grams or moles to atoms, but not atoms to grams. My other problem is how do you
  62. chem

    H2 stored in a 50.0 L container has a pressure of 500.0 torr. O2 stored in a 25.0 L container has a pressure of 800.0 torr. If both these gases are released together to be stored in a 100.0 L container, what is the total pressure in the 100.0 L container?
  63. Chemistry

    A 10 gram of mass of krypton occupies 15.0 L at a pressure of 210 kPa. What is the volume of the krypton when the pressure is increased to 790 kPa?
  64. Chem

    A Baloon is filled with 3.00 L of helium at a pressure of 765 Torr. What is the volume of the baloon at an altitude where the atmospheric pressure is 530 torr?
  65. chemistry

    A balloon is filled with 2.2 cm3 helium gas at 132.4 atm pressure. What will be the new pressure (atm) if the volume is changed to 68.6 cm3?
  66. chem

    A sample of gas has an initial volume of 32.6L at a pressure of 1.2atm.If the sample is compressed to a volume of 13.4L , what will its pressure be? (Assume constant temperature.)
  67. Science

    During exercise your body's blood pressure increases as it cool down the body's blood pressure slowly returns to its normal state this is know as?
  68. Chemistry

    When a sample of neon with a volume of 683 mL and a pressure of 0.792 atm was heated from 19.0 to 76.0 °C, its volume became 733 mL. What was its final pressure (in atm)?
  69. Chemistry 105

    A sample of gas has an initial volume of 33.0 L at a pressure of 1.1 atm. If the sample is compressed to a volume of 10.0 L, what will its pressure be? (Assume constant temperature.)
  70. Chemistry

    At 27 degrees celcius, nitrogen has a volume of 650 cm^3 under a pressure of 980 mmHg. What would be its volume at the same temperature but at a pressure of 760 mmHg?
  71. chemistry

    80g of NaCl are dissolved in 400g H2O. if the vapor pressure of the water is 40 mmHg , what is the vapor pressure of NaCl above the solution?
  72. physics

    Tension is: ---------A contact-free force ---------A contact force ---------A specific form of energy ---------A pressure value corrected for the air pressure
  73. chemistry

    A 10-g mass of krypton occupies 15.0 L at a pressure of 210 kPa. Find the volume of the krypton when the pressure is increased to 790 kPa.
  74. Physics

    At what depth beneath the surface of a lake is the absolute pressure 2 times the atmospheric pressure of 1.01 105 Pa that acts on the lake's surface?
  75. chemistry

    If four grams of Oxygen and four grams of Helium are placed in a five liter vessel at 338 K, what will be the partial pressure of each gas and the total pressure in the vessel?
  76. chem

    At a pressure of 2 atm, hydrogen gas occupies a volume of 8 L. What pressure must the gas be under if the volume is increased to 10 L? Don't forget the units.
  77. Chemistry

    A sample of nitrogen is collected over water at 21 degrees Celsius at a pressure of 745 torr. What is the partial pressure, in torr, of the nitrogen?
  78. math

    The function,p(d)=1+d/33, gives the pressure in atmospheres(atm), at a depth d in the sea (d is in feet).Note that p(0)=1 atm, p(33)=2, and so on. Find the pressure at 120 feet.
  79. math

    The function,p(d)=1+d/33, gives the pressure in atmospheres(atm), at a depth d in the sea (d is in feet).Note that p(0)=1 atm, p(33)=2, and so on. Find the pressure at 120 feet.
  80. Chemistry

    The solubility of nitrogen in water is 6.9 x 10^-4 at exactly 1 atm pressure. What is the solubility of nitrogen under .80 atmp pressure? I don't know where to start with this problem, what formula do I use?
  81. chemistry

    At a pressure of 405 kPa, the volume of a gas is 6.00 cm3. Assuming the temperature remains constant, at what pressure will the new volume be 4.00 cm3?
  82. Algebra

    The function p(d)=1+d/33, gives the pressure in atmospheres (atm), at the depth d in the sea (d is in feet). Note that p(0)=1 atm, p(33)=2 and so on. Find the pressure at 40 feet? I am lost please help? Thanks!
  83. chemistry

    if oxygen gas were collected over water at 22c and the total pressure of the wet gas were 710 mm hg what would be the partial pressure of the oxygen?
  84. chemistry

    A sample of gas has an initial volume of 20.9 L at a pressure of 1.4 atm If the sample is compressed to a volume of 12.9 L: , what will its pressure be? (Assume constant temperature.) Thank you
  85. chemistry

    a gas has a volume of 95 mL at a pressure of 930 torr. What volume will the gas occupy at standard temperature if pressure is held constant?
  86. chemistry

    A gas sample with a volume of 5.3L has a pressure of 745mmHg at 33degrees C.What is the pressure of the sample if the volume remains at 5.3L but the temperature rises to 79degres C?
  87. Chemistry :((((

    a gas occupies a volume of 5L at a temp. of 20C and a pressure of 1atm. what volume would it occupy at a temp. of 30C and a pressure of 1.1 atm.
  88. Physics..

    A container of gas is at a pressure of 1.3x10^5 Pa and a volume of 6.0m^3. How much work is done by the gas if it expands at constant pressure to twice its initial volume? Please help me I really don't know what to do,,,
  89. Chemistry

    if a gas is initially at 1.5 atm of pressure, Occupies a volume of 3.0 L at a tmepeature of 293K, what will be the new volume if the pressure increases to 2.5 atm and is now at 303K?
  90. Innovation

    A car tire contains air at a pressure of 24 lb/in^2 at 0 degrees C. If the volume of the tire remains unchanged, what will the pressure be when the temperature has increased to 32 degrees C?
  91. oxford-chemisrty

    if the total pressure of a container filled with oxygen gas, nitrogen gas and water vapor is equal to the pressure of what ? A.oxygen only B. oxygen and nitrogen only C. water vapor only D. All 3 gasses added together Dalton's Law of Partial Pressures: The
  92. chemistry

    given this reaction N2O5 -> 2 N2O + 1/2 O2 all gases and given the initial pressure (P Initial) and total pressure (P total)at any time, relate the partial pressure of N2O5 (PP N2O5) to P total for any time during this reaction. Consider gas kinetics. My
  93. chemisty

    Posted by STACY on Monday, December 13, 2010 at 7:56pm. Consider an aqueous solution prepared from 250.0 mL of water and 1.27 g of potassium bromide. Express the amount of potassium bromide in this solution in terms of (a) mass percent (b) mole fraction
  94. Fluid Mechanics

    We have a gate (3 meter long and 3 meter wide) at a 40o angle being held onto the slab by the pressure of the water with a hinge at the base. The distance z is 0.75 m. Assume that air at atmospheric pressure is above the water on the right hand side and on
  95. maths &chemistry

    Nitrogen tetraoxide is known to dissociate accoding to the equation;N2O4(g)_2NO2(g).A250mlsample of the gas mixture weighs 0.257bar.Calculate the partial pressure of each gas.(Hint:obtain the pressure it had before dissociation ,and then use the idea of
  96. Chemistry

    I had to perform an experiment using a coffee-cup calorimeter to determine the enthalpies of two separate reactions. For part 1 we worked with magnesium metal, and magnesium oxide. Data was collected and now I need to find the q, heat transferred for both
  97. CHEMISTRY

    WHAT PRESSURE WILL BE COMPRESS 7.75 LITRES OF HYDROGEN AT ATMOSPHERIC PRESSURE TO 5 LITRES?
  98. Chemistry

    Stuck on this because I haven't done chemistry in a while. Can someone guide me through it or help me out? Balance the reduction-oxidation chemical equation in base: MnO4- + HSO3- -> MnO2 + SO4^ 2-
  99. Chemistry 130

    Can someone please help me with this question? Could freezing point depression be used for substances that are not soluble in water? Please help me....can you explain why? Is there anywhere I can find this information because my chemistry book doesn't have
  100. chemistry to MathMate

    Chemistry - CJ, Tuesday, March 31, 2015 at 10:53pm I am experiencing a major block.... I can't say.... 1micrometer= 1000nm 5micrometer= x..... because I'll get back the same thing So please help me, tell me the answer please.