osmotic pressure chemistry

64,382 results, page 36

  1. Chemistry 103

    2NiO(s)→2Ni(s)+O2(g) If O2 is collected over water at 40.0C and a total pressure of 739mmHg , what volume of gas will be collected for the complete reaction of 24.18g of NiO?
  2. CHEMISTRY URGENT!

    a sample of oxygen that occupies 1.00 x 10^6mL at 575mmHg is subjected to a pressure of 1025atm. what will the final volume of the sample be if the temperature is held constant? how do uu set up the equation
  3. chemistry

    A sample of oxygen that occupies 1.00x10^6 mL at 575 mm Hg is subjected to a pressure of 1.36 atm. What will the final volume of the sample be if the temperature is held constant? How would I set up this equation?
  4. Chemistry

    A gas occupies 275 ml at 0°C and 610 Torr. What final temperature would be required to increase the pressure to 760 Torr, the volume being held constant?
  5. Chemistry

    A mixture containing 5 g of H2 and 10 g of o2 is allowed to react in a 15 L rigid container at a constant temperature of 25 C. H2+O2->H2O Once the reaction is complete, what will be the pressure of the excess gas inside the container?
  6. Chemistry

    If 500 mol of hydrogen gas occupies 5.00L at 25 celsius, what is the pressure in atm? I believe this is Ideal gas law. I can't figure out how to put it in the PV=nRT.
  7. Chemistry

    Which of the following factors affect the solubitity? a)temperature of the solutions b)polarity of the solvent vs solute molecules c)partial pressure of the gas above the solution d) all of the above
  8. chemistry

    A sample of oxygen that occupies 2.5 × 10−6 mL at 508 mm Hg is subjected to a pressure of 1.2 atm. What will the final volume of the sample be if the temperature is held constant? Answer in units of mL
  9. chemistry

    Consider the following chemical reaction: 2 KNO3 (s) ------------> 2 KNO2 (s) + O2 (g) What volume, in liters, of O2 at 31.2oC and 2.045 atm pressure can be produced from the decomposition of 54.92 g of KNO3 (FM = 101.1 g/mol).
  10. Chemistry

    To charge a lead storage battery you must apply a direct current to it. hold a magnet close to it.*** force alternating current through it. increase the pressure on it.
  11. Chemistry

    To charge a lead storage battery you must apply a direct current to it. hold a magnet close to it. force alternating current through it.*** increase the pressure on it.
  12. Chemistry

    8.8 g of iron(II) sulphide reacts completely with excess dilute hydrochloric acid. Calculate the volume of hydrogen sulphide evolved, measured at 18 º C and 729 mmHg pressure.
  13. Chemistry

    How many liters of CO2 would be collected over water from the bomcustion of 35g of cyclohexane, if the gas is collected at a barometric pressure of 765 torr and a temperature of 303 K?
  14. Chemistry

    Calculate the number of molecules in a deep breath of air whose volume is 2.25L at body temperature, 37 Celsius, and a pressure of 735 torr. Answer is 5.15 x 10^22 molecules. Help me!
  15. Chem

    Can someone check these homework answers please? 32. The barometric pressure measured outside an airplane at 9 km was 259 mmHg. Calculate the pressure in kPa. 34.5 kPa 36. A diving bell is a container open at the bottom. As the bell descends, the water level inside changes so ...
  16. Chemistry: Check please, these are hw assignments

    1. Gases can be considered fluids. a.) True b.) False Answer: False 2.Gases are not easily compressed. a.) True b.) False Answer: True 3. Gases spread to fill out space. a.) True b.) False Answer: True 4. Increased pressure on a gas at constant temperature will cause the ...
  17. 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 pressure will be less than 118?
  18. algebra

    the atmospphere normally exerts a pressure of about 15 pounds per square inch on surfaces at sea level. about how much pressure does the atmosphere exert ona surface 30 square inches in area? would it be 2pounds
  19. 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 Mt. Everest?
  20. 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 Mt. Everest?
  21. 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 the aluminum.
  22. chemistry

    1)A sample of CO2 gas which weighs 0.85 grams has a volume of 1.30 liters when collected at 30°C. What would be the pressure of the gas sample? 2) A gas sample has an original volume of 600 ml when collected at 720 mm and 35°C. If a change is made in the gas temperature ...
  23. Chemistry

    What is the final volume of 725 mL of neon gas at 240.°C if the gas is cooled to 54.5°C? Assume the pressure and the amount of gas are held constant.
  24. Chemistry

    What is the final volume of 945 mL of neon gas at 174°C if the gas is cooled to 58.5°C? Assume the pressure and the amount of gas are held constant.
  25. Chemistry

    N2 (g) + H2 (g) <--> NH3 (g) + energy Name the direction of equilibrium shift - The pressure of the system is increased. - H2 is added to the system. - The temperature of the system is decreased.
  26. chemistry

    A closed gas cylinder contains 0.500 mole H2, 0.300 mole O2, 1.200 mole CO2 at a temperature of 25 °C and a pressure of 2.00 atm
  27. Chemistry Honors

    A sample of 2.0 moles of dihydrogen gas is placed in a container with a volume of 10.4 L. What is the pressure of of the gas in torr if the gas is at 25 degrees Celsius.
  28. Chemistry

    A compound is 85.6% carbon by mass. The rest is hydrogen. When 10.0 g of the compound is evaporated at 50.0 ∘C, the vapor occupies 6.30 L at 1.00 atm pressure. What is the molecular formula of the compound?
  29. Astronomy

    Atmospheric pressure is simply the weight (remember Newton’s Laws) of the atmosphere pushing down divided by the area upon which the atmosphere is pushing. The metric units of pressure are Newtons/m2 (also called a Pascal; you might also have heard of pounds per square inch...
  30. Chemistry - PLEASE HELP!!!

    A 5.0 g n2o (laughing gas) that is inside a 12 mL cylinder used used to fill up a 800 mL whipped cream container. Beforehand, the container had air in it at 760 torr atmosphere pressure at 25 degrees celsius. Then, we will add the n2o/air mix to balloon until the pressure in ...
  31. chem.

    A sample of argon at 300. °C and 50.0 atm pressure is cooled in the same container to a temperature of 0. °C. What is the new pressure? 105 atm 45.5 atm 54.9 atm 23.8 atm 42.7 atm
  32. Peer pressure question

    Peer pressure is the influence that ___ may have on you. A. people your age B. people younger than you C. people other than you <<<< D. your brothers and sisters
  33. Chem Help Please!!! DrBob222

    a) The equipment you would use for carrying out a simple distillation at reduced pressure (i.e. under vacuum) b) the equipment you would use for carrying out a simple distillation at atmospheric pressure. a) The equipment you would use for carrying out a simple distillation at...
  34. chemistry

    1. Unless otherwise instructed, you may use the periodic table in the Chemistry: Problems and Solutions book for this test. You also may use the formulas on pages 238 243. A student increases the temperature of a 556 cm3 balloon from 278 K to 308 K. Assuming constant pressure...
  35. chem

    Consider the decomposition of ammonium hydrogen sulfide: NH4Hs(s) <--> NH3(g) + H2S(g) In a sealed flask at 25*C are 10.0 g NH4HS, ammonia with a partial pressure of .692 atm, and H2S with a partial pressure of .0532 atm. When equilibrium is established, it is found that...
  36. Chemistry

    When solid magnesium nitride reacts with water the reaction produces solid magnesium hydroxide and ammonia gas. If 22.9 grams of magnesium nitride are added to 31.0 grams of water, how many liters of ammonia should be produced (assuming standard temperature and pressure)? ...
  37. phy

    A popular brand of pressure washer claims to deliver 330 litres per hour of water at a pressure of 80 bar, drawing 1400 W of electrical power in the process. Pressure washers of this type consist of an electric motor that drives a small compressor to pressurize water fed into ...
  38. chemistry university

    In this experiment you will be placing solid CO2 into a 10 ml tube. The tubes are not completely gas-tight, but what if they were? What would be the pressure inside the tube in atm, after all the dry ice had vapourised, if 3.72 g of solid CO2 was originally added and the tube ...
  39. CHEMISTRY

    When air pollution is high, ozone (O3) contents can reach 0.60 ppm (ie., .60 mol ozone per million mol air). How many molecules of ozone are present per liter of polluted air if the barometric pressure is 755 mm Hg and the temperature is 79 degrees F? I converted temperature ...
  40. math

    A gauge pressure of 30 psig is equivalent to an absolute pressure of______. 15.3 psia 30 psia 44.7 psia 64.7 psia
  41. chemistry

    What is the total pressure in a 4.00 L flask at 298 K, that contains 2.6 moles of He, 0.8 moles of Ne, 1.6 moles of O2?
  42. Soil Chemistry

    an initial pressure of 1.50atm, an initial volume of 30.0L and an initial temperature of 40.0C.
  43. chemistry

    Increasing pressure does what to solubility. Increasing surface area? increasing temp?
  44. Chemistry

    Propane gas (C3H8) burns completely in the presence of oxygen gas (O2) to yield carbon dioxide gas (CO2) and water vapor (H2O). Write a balanced equation for this reaction. Assuming that all volume measurements occur at the same temperature and pressure, how many liters of ...
  45. Chemistry

    Propane gas (C3H8) burns completely in the presence of oxygen gas (O2) to yield carbon dioxide gas (CO2) and water vapor (H2O). Write a balanced equation for this reaction. Assuming that all volume measurements occur at the same temperature and pressure, how many liters of ...
  46. chemistry

    Heterogenous equilibrium of ammonium bisulfide. Ammonium bisulfide NH4HS forms ammonia NH3 and hydrogen sulfide H2S through the reaction NH4HS(s) arrows + H2S(g). This reaction has a kp value of 0.120 at 25 C. A 5.0-L flask is charged with .400g of pure H2S(g) at 25 C. ...
  47. Science

    What is the pressure at the bottom of a tube of mercury that is 0.2 m deep? An elephant with a mass of 1000 kg stands on a circus platform that weighs 50 kg. The area of the bottom of the platform is 1.25 m². How much pressure is exerted on the floor beneath the platform? Two...
  48. texas southern university

    A quantity of gas in a piston cylinder has a volume of 0.544 m3 and a pressure of 200 Pa. The piston compresses the gas to 0.126 m3 in an isothermal (constant-temperature) process. What is the final pressure of the gas? ??__Pa
  49. thermodynamics

    dG for the formation of Hi(g) from its gaseous elements is -20.2 kj/mol at 500k. when the partial pressure of HI is 10 atm, and I2 0.001 atm, what must the partial pressure of hydrogen be at this temperature to reduce the magnitude of dG for the reaction to 0. H2(g)+I2(g)----&...
  50. Chemistry

    refer to the reaction 2NH3 (g) ↔ N2 (g) + 3H2 (g), and ΔH = 92.2 kJ. 1.What will be the effect on the concentration of H2 if the temperature decreases? A. H2 concentration will decrease. B. H2 concentration will not change. C. H2 concentration will increase. D. H2 ...
  51. Chemsitry

    Which of the following is NOT true about the thermodynamic standard state? A. A solid is in its standard state when the atmospheric pressure is 1.00 atm and the temperature is 25C. B. An aqueous solution is in its standard state at a concentration of 1.00 M. C. A gas is in its...
  52. Chemistry..Please Help

    1. The vapor pressure of dichloromethane, CH2Cl2, at 0C is 134mmHg. The normal boiling point of dichloromethane is 40C. Calculate its molar heat of vaporization The answer is in kilojoules per mole. I know i use the Clausius-Clapeyron equation but i don't know what to plug in...
  53. 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 use for this ...
  54. physics

    A current I=1A flows along a thin-walled cylinder of radius R=4cm. What pressure in Pascals do the walls of the cylinder experience? Assume that the current is uniformly distributed. Bonus thing to think about: Is this pressure directed inwards or outwards?
  55. 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 reaches the surface?
  56. Chemistry

    4.0 L of hydrogen gas reacts with 2.0 L of nitrogen gas (at the same temperature and pressure), producing ammonia gas, NH3. Find the limiting reactant.
  57. chemistry

    Under the same temp.and pressure ,nitrogen gas diffuses 8 times as fast as gas y .calculate the relative molecular mass of gas y.
  58. Chemistry

    2.Which gas law would you use to calculate the new pressure for a gas when the volume of the trapped gas changes well temperature remains constant?
  59. 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 sum of the partial ...
  60. science; AP Chem

    I don't know how to find the kpa for 35.78 m in this question. I know its a P1V1=P2V2 question, i just need the kpa for 35.78m pls! Question: Divers know that the pressure exerted by the water increases about 100 kPa with every 10.2 m of depth. This means that at 10.2 m below ...
  61. colligative properties

    a solution of CH4N2O in water has a vapor pressure of 19.6 torr. at 25C. what is the mole fraction of CH4N2O in this solution? HELP ME WATER PURE PRESSURE (P0) IS 23.8 TORR VAPOR PRESSURE IS 19.6 TORR DONT KNOW HOW TO SOLVE IT ? P(SOLUTION)= X (CH4N2O) WATER (PURE PRESSUR
  62. chemistry

    in the equation PV=nRT for gases what do each letter stands for? P is pressure (usually in atmospheres). V = volume in liters. n is number of mols R is the universial gas constant = 0.08206 liter*atm/mol*K T is termperature in Kelvin.
  63. Chemistry

    Can someone please check my answer...thank you! According to Raoult's law, as the mole fraction of dissolved nonvolatile solute in a given amount of solvent increases, the solution vapor pressure: VARIES AT RANDOM?
  64. Chemistry

    A balloon filled with 1.35 atm of dimethyl ether gas and 5.25 atm of oxygen gas at 27 °C has an initial volume 2.00L They react according to the following reaction: C2H6O (g) + 3 O2 (g) -> 2 CO2 (g) + 3 H2O (g) The system is allowed to back cool down to 27 °C following ...
  65. chemistry

    A microtube is found to have an ungraduated portion that will contain 0.26 g of water. Upon setting up the experimental apparatus as described in the experiment, a microtube is filled to 0.01 ml with water at 4ºC. At a temperature of 60ºC, the volume of head space within the...
  66. chemistry

    A weather ballon with a 2 meter diameter at ambient temperature holds 525 grams of helium. what type of electric probe could be used to determine the pressure inside the ballon?
  67. CHEMISTRY

    Water has a van der Waals constants of a = 5.464 L·atm/mol2 and b = 0.03049 L/mol. What is the pressure of 5.20 moles of water vapor in a 1.10 L container at 100.0°C? I Don't understand this problem!
  68. Chemistry

    If 200 ml of gas held at a constant pressure has a starting temperature of 300 degrees K, and it expands to fill a 300 ml space, what would be the new temp? (I got 454.54) Thanks!
  69. Physical chemistry

    Calculate the pressure and composition of air on the top of Mt. Everest, assuming that the atmosphere has a temperature of −20°C independent of altitude (h = 29141 ft). Assume that air at sea level is 20% O2 and 80% N2.
  70. Chemistry

    To what Celsius temperature must 44.5 mL of methane gas at 43.0°C be changed so the volume will be 63.0 mL? Assume the pressure and the amount of gas are held constant. I have already tried T1V1=T2V2
  71. chemistry

    mass= 3.8721g temperature= 102 degrees Celsius volume= 156ml atmospheric pressure= 755.0 mm Hg calculate the molar mass using the ideal gas law
  72. Chemistry

    a 5.00 Liter tank holds argon gas a 675 kPa and 11C. what would be its pressure if this argon is transferred to a different tanks whose volume is 17.0 liters at 135C?
  73. Chemistry

    a 5.00 Liter tank holds argon gas a 675 kPa and 11C. what would be its pressure if this argon is transferred to a different tanks whose volume is 17.0 liters at 135C?
  74. Chemistry

    a 5.00 Liter tank holds argon gas a 675 kPa and 11C. what would be its pressure if this argon is transferred to a different tanks whose volume is 17.0 liters at 135C?
  75. chemistry

    a weather balloon with a 2 meter diameter at ambiient tempatures holds 525 grams of helium. what type of electroniic probe could be used to determine the pressure inside the balloon
  76. Chemistry

    A certain substance has a heat of vaporation 56.21 kj/mol. At what kelvin temperature will the vapor pressure be 6.50 times higher than it was at 361k? I need help in setting the problem: I got 56.21/8.3145j/mol.k(1/T1-1/T2)?
  77. chemistry

    A piston has an external pressure of 9.00 atm. How much work has been done if the cylinder goes from a volume of 0.130 liters to 0.500 liters? can someone explain to me how am i supposed to do this please? Thanks :D
  78. chemistry

    The average out door concentration of carbon monoxide ,co at 15 c and 1 atm of pressure is about 900 micrograms per cm^3 . What is this concentration expressed : on ppm scale ? And on the molecules /cm^3scale?
  79. chemistry

    Calculate the partial pressure of propane in a mixture that contains equal numbers of moles of propane (C3H8) and butane (C4H10) at 20 °C and 505 mmHg. (R=0.082 L-atm/K mol)
  80. chemistry

    If the rocket engine contains 1500.0 grams of H2O2 and an excess of N2H4, what volume of water vapor will be produced when the rocket fires up to a temperature of 540°C and a pressure of 1.2atm?
  81. chemistry

    Assuming the temperature and pressure are held constant, which of the gas samples has the greatest number of gas particles? Answer 45.0 mL O3 35.0 mL N2 15.0 mL of CO2 25.0 mL of SO3 how would i go about answering this question.
  82. chemistry

    what will be the internal pressure causes by hydrogen gas when 5.00 g of zinc is dissolved in 50 g of concentrated hydrochloric acid if the volume of the container is 250 mL and the container is allowed to cool 20 degrees celcius
  83. chemistry

    Calculate the partial pressure of propane in a mixture that contains equal numbers of moles of propane (C3H8) and butane (C4H10) at 20 °C and 616 mmHg. (R=0.082 L-atm/K mol)
  84. chemistry

    Calculate the partial pressure of propane in a mixture that contains equal numbers of moles of propane (C3H8) and butane (C4H10) at 20 °C and 616 mmHg. (R=0.082 L-atm/K mol)
  85. chemistry

    Calculate the partial pressure of propane in a mixture that contains equal numbers of moles of propane (C3H8) and butane (C4H10) at 20 °C and 616 mmHg. (R=0.082 L-atm/K mol)
  86. chemistry

    Calculate the ÄHvap , in kJ/mol, for ethanol, given that the vapor pressure at 45.0°C is 155.0 torr. The normal boiling point of ethanol is 78°C. Express your answer to two decimal places.
  87. science

    At a pressure of 2.00 atm, a sample of air consists of 0.20 moles of nitrogen, 0.65 moles of oxygen and 0.15 moles of argon. What is the partial pressure of the oxygen?
  88. Physics

    By how much does the air pressure in a house increase if the house is sealed and the air temperature increases from 10.7° C to 21.0° C? The initial air pressure is 1.00 atmosphere.
  89. physics

    In a water pistol, a piston drives water through a larger tube of radius 1.00 cm into a smaller tube of radius 1.00 mm. (a) If the pistol is fired horizontally at a height of 1.5m, use ballistics (2-D projectile motion) to determine the time it takes water to travel from the ...
  90. science

    Which of the answer choices is a true statement about the properties of an enclosed gas? (Select all that apply) if a gas pressure remains constant, then increasing the temperature of a gas will increase its volume if the gas temperature remains constant, then increasing the ...
  91. Earth Science

    10.   Which statement best describes the formation of diamonds?  A. Diamonds form in kimberlites under very low pressure. B. Diamonds form in talc under very low pressure. C. Diamonds form in talc under very high pressure. D. Diamonds form in kimberlites under very ...
  92. CHEM

    A balloon contains 3.3 liters of nitrogen gas at a temperature of 90K and a pressure of 101 kPa. If the temperature of the gas is allowed to increase to 25∘C and the pressure remains constant, what volume will the gas occupy? V=_____L? Ty again!
  93. 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 center of the lid...
  94. Chemistry

    Assuming ideal behavior, determine the mole fraction of acetone in a solution of acetone and water if the vapor pressure of acetone changed from 750mmHg to 735mmHg.
  95. Biology

    At which of the capillary bed is the fluid pressure higher? 1)osmostic pressure- (25 mm Hg arteriolar end) ( 25 mm Hg venous end) 2)fluid pressure- 25 mm Hg arteriolar end) ( 15 mm Hg venous end) 3)absorption ( 10 mm Hg arteriolar end) ( 10 mm Hg Venous end)
  96. re-apchem post

    a 2L container is charged with 2atm of O2 at 298 Kelvin. Ch4(g) + 2O2(g) --> CO2(g) + 2H20(g) calculate the partial pressure of methane needed to react completely with the O2 in the vessel. What is the total pressure after the reaction is complete if the temperature ...
  97. CHEM- KINETICS

    this is a text book question that i cannot figure out. the decomposition of dimethyl ether at 510 degrees is a first-order process with a rate constant of 6.8*10^-4. (CH3)2O(g)--> CH4(g) + H2(g) + CO(g) if the partial pressure of (CH3)20 is 18kPa, what is its partial ...
  98. science

    how do i ansewr this question? An aerosol spray can with a volume of 400. mL contains 2.25 g of propane gas (C3H8) as a propellant (a) If the can is at 31°C, what is the pressure in the can? (b) What volume would the propane occupy at STP? (c) The can's label says that ...
  99. physics

    Water is forced out of a fire extinguisher by air pressure. How much gauge air pressure in the tank (above atmospheric) is required for the water jet to have a speed of 34.6 m/s when the water level is d = 0.520 m below the nozzle?
  100. physics

    The static pressure in a horizontal pipeline is 4.3 x 10^4 Pa, the total pressure is 4.7 x 10^4 Pa, and the area of cross-section is 20cm^2. The fluid may be considered to be incompressible and non-viscous and has a density of 10^3 kg/m^3. Calculate (i) the flow velocity in ...
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