osmotic pressure chemistry

64,622 results, page 66
  1. Chemistry

    The complete combustion of 0.100 mol of CH4 in oxygen in a bomb calorimeter caused the water of the calorimeter to rise in temperature from 25.00 degrees Celsius to 37.70 degrees Celsius. Suppose that the combustion of the 0.1 mol of CH4 was instead run at
  2. College Chemistry

    1. From data below, calculate the total heat (in J) associated with the conversion of 0.514 mol ethanol gas (C2H6O) at 451°C and 1 atm to liquid ethanol at 25.0°C and 1 atm. (Pay attention to the sign of the heat.) Boiling point at 1 atm 78.5°C cgas
  3. College Chemistry

    1. From data below, calculate the total heat (in J) associated with the conversion of 0.514 mol ethanol gas (C2H6O) at 451°C and 1 atm to liquid ethanol at 25.0°C and 1 atm. (Pay attention to the sign of the heat.) Boiling point at 1 atm 78.5°C cgas
  4. College Chemistry

    1. From data below, calculate the total heat (in J) associated with the conversion of 0.514 mol ethanol gas (C2H6O) at 451°C and 1 atm to liquid ethanol at 25.0°C and 1 atm. (Pay attention to the sign of the heat.) Boiling point at 1 atm 78.5°C cgas
  5. Physics

    Poiseuille’s equation relates the volumetric flow rate Q (volume per time unit) to the pressure differential ΔP that drives the flow: Q = (πr^4)/(8η) x (ΔP/L) Here η is the viscosity of the fluid and the tube has length L and radius r. A fire
  6. Chemistry

    So I do know how to work out letter a) but I'm still very confused with parts b and c. Appreciate the help! 2FeN(s) + 3H2(g) --> 2Fe(s) + 2NH3(g) Suppose that the reaction is carried out at 300C and 3.00 atm. 1.00 grams of iron (III) nitride reacts.
  7. Chemistry

    If 16.5 g of oxygen gas is required to inflate a balloon to a certain Volume at 26.5 degrees Celcius, what mass of oxygen gas is required to inflate the same balloon to the same volume and pressure at 10.0 degrees Celcius?
  8. college chemistry

    Pentane, C5H12, and hexane, C6H14, combine to form an ideal solution. At 25⁰C the vapor pressure of pentane is 511 torr and that of hexane is 150 torr. In the vapor over a pentane-hexane solution at 25⁰C, the mole fraction of pentane is 0.15.
  9. Advance Chemistry

    A series of measurements are made in order to determine the molar mass of an unknown gas. First, a large flask is evacuated and found to weigh 134.567 g. It is then filled with the gas to a pressure of 735 torr at 31°C and reweighed; its mass is now
  10. Physical science

    After a car is driven for some distance, why does the air pressure in the tires increase?
  11. chem

    what are some of the factors that affect melting point besides, impurities, pressure, and having a wet solution?
  12. Physical Science

    After a car is driven for some distance, why does the air pressure in the tires increase?
  13. PHYSICS topic is pressure

    Why does a person feel difficult to breathe when he is in a deep well? Please answer!!!
  14. 4th grade-science

    what is the connection between air pressure and the weather.show it also with a diagram
  15. Human Physiology

    What would be the effect of low blood protein levels on the colloidal pressure?
  16. science

    what temperature must a gas at 0 degree Celsius if its volume is to double while its pressure remains the same ?
  17. Science

    Why are there variations in atmospheric pressure how was this proven? Why do your ear pop when trebling to different altitudes?
  18. Chem

    Does atmospheric pressure increase or decrease as altitude increases? (Neglect changes in temperature.)
  19. chem

    If 7.59 moles of an ideal gas has a pressure of 4.41 atm, and a volume of 71.59 L, what is the temperature of the sample?
  20. chem

    Calculate the number of mol of helium in a 11.2 L balloon at 300 K and 1.00 atm of pressure ?
  21. science

    what happens to the volune of a gas inside a cylinder if the temperature does not change but the pressure is reduced
  22. Biology 20

    Explain how low and high blood pressure can contribute to kidney failure.
  23. Science

    Calculate the expansion work done when 50g of water is electrolysis under constant pressure
  24. Chem-Gases

    Explain how attractive forces between molecules decrease the pressure of a gas?
  25. Science

    If a boy applies a force of 16N on an area of 16cm2,what will be the pressure produced by him?
  26. government

    what hypothesis can i give for: -health care in the usa -pressure groups in the uk -the elderly in the uk
  27. physics

    If I have 1.5 moles of an ideal gas at a pressure of 3 atmospheres and a volume of 7 liters, what is the temperature?
  28. physics

    what pressure would you expect if the gas in the flask were heated to 150 degrees celsius?
  29. maths

    calculate the volume occupied by 5.25 gram of nitrogen at 26 degree Celsius and 74.2 cm of pressure
  30. Biology

    Why is there a variation in systolic and diastolic pressure among members in different age groups and different genders?
  31. physics

    Can you find the pressure exerted on the floor by the heel if it has an are of 1.50 cm^2 and the woman's mass is 55kg?
  32. Chem

    How would the pressure of a gas change if suddenly the intermolecular forces were repulsive rather than attractive?
  33. PHYSICAL SCIENCE

    How do the pressure variation with depth affect our ability to explore the ocean?
  34. chem

    The volume of any solid, liquid, or gas will change with _________. temperature and pressure.
  35. Physics

    What is the volume of 3.25 moles of a gas at a temperature of 115 K and a pressure of 275 kPa?
  36. Physics

    The density of the dead sea is 1240kg/m^-3. Calculate the depth at which the pressure would be 3 atm
  37. physics

    What is the pressure inside a 33.1 L container holding 109.1 kg of argon gas at 399 K?
  38. Science

    What pressure is exerted by 0.010 mol of methane gas if it is volume is 0.26 L at 373°K?
  39. science

    Pressure changes layers of mud into shale. What type of rock is the answer sedimentary
  40. physics

    What is the pressure exerted on the ground by a cube which has a weight of 600N and a side of 1m2
  41. college chem 2

    What pressure would be required to form a 0.050 M solution of helium (kH = 3.7 x 10-4 M/atm) at 25 °C?
  42. physics

    2) The weight of tank is 50 000 kg, area of his tracks is 5 m2. What pressure acts on the ground?
  43. Science

    Calculate the pressure exerted on your finger if you hold up a 15-pound box of apples.
  44. Science

    What happens to the volume of a gas inside a piston if the termperatue does not change but the pressure is reduced?
  45. groundwater science

    True or False: for a particular soil, pressure just under the water table is negative
  46. Physics

    What is the difference in blood pressure between the head and feet of a person of height 171 cm?
  47. SCIENCE

    A PIPE FULL DIESEL HAS 5 PSI ON IT, AT 70 DEGREES AND ONE DEGREE OF CHANGE = WHAT PRESSURE
  48. biology

    Give two reasons why the pressure decreases as blood flows along the capillary bed.
  49. physics

    state whether the variation pressure at nodes in a stationary wave is maximum or zero .justify
  50. social studies

    What is the difference between high and low pressure systems and what weather does each bring?
  51. Science

    1.) A 2OL Of gas is found to exert 3.5atm at 25°C what would the pressure be if the temperature is changed to 30°C.
  52. physics

    2) The weight of tank is 50 000 kg, area of his belts is 5 m2. What pressure acts on the ground?
  53. Weather & Climate (science)

    Why is it that an Aneriod Barometer Can be used to measure elevation as well as air pressure?
  54. physics

    2) The weight of tank is 50 000 kg, area of his belts is 5 m2. What pressure acts on the ground?
  55. Science

    measure the pressure of (water being) 1000kg/mmm density and 40 kg weight on its base
  56. Science

    Calculate the pressure exerted on your finger if you hold up a 15-pound box of apples.
  57. English

    What's a good introduction for an essay about Pressure that Working College Students Face? please help (:
  58. physics

    2) The weight of tank is 50 000 kg, area of his belts is 5 m2. What pressure acts on the ground?
  59. chemistry

    (You may have seen this before) A crude oil burned in electrical generating plants contains about 1.2% sulfur by mass. When the oil burns, the sulfur forms sulfur dioxide gas: S(s) + O2(g) -------> SO2(g) How many liters of SO2 (d = 2.60 g/L) are
  60. Physics ~Thermodynamics~

    * Pressure * 1) what other ways can the pressure of a gas be changed? * Internal Energy * 2) A cup of hot tea is poured from a teapot, and a swimming pool if filled with cold water. a) Which one has a higher internal energy? b) Which has a higher average
  61. chemistry plz helpp!

    A) 9.8g of an alcohol A completely reacts with an excess of sodium , and a gas is released. When the reaction ceases the volume of the gas is 1.6L measured at a temperature of 22ºc and under a pressure of 1 bar.  a- What gas is released in this reaction,
  62. Chemistry

    What is the total heat evolved when a saturated solution of boric acid (H3BO3) in water is cooled from 100C to 20C? Note the specific heat capacity of the saturated solution is approximately that of water in that temperature range (4.20 J/g.K) and the
  63. Chemistry

    A gas is allowed to expand at constant temperature from a volume of 2.00 L to 11.20 L against an external pressure of 1.500 atm. If the gas loses 256 J of heat to the surroundings, what are the values of q, w, and ΔU? Pay careful attention to units.
  64. Chemistry

    A gas is allowed to expand at constant temperature from a volume of 2.00 L to 11.20 L against an external pressure of 1.500 atm. If the gas loses 256 J of heat to the surroundings, what are the values of q, w, and ΔU? Pay careful attention to units.
  65. Chemistry-Could you check this, please?

    I have a balloon that contains 22 grams of Carbon dioxide. The barometric pressure is 1019 millibars which I converted to 1.006 Atm and the temperature is 299 "K". What is the volume of balloon? I used the ideal gas law to find out the volume in liters of
  66. Chemistry

    A student produced a volatile liquid experiment with the following results: Mass of flask, boiling water, foil cap, and unkown after cooling, g: 83.350 Mass of flask, boiling stone, and foil cap, g: 82.657 Water bath temperature: 95*C Barometric pressure:
  67. chemistry

    A method for scrubbing CO2(g) from the air on a spacecraft is to allow CO2(g) to react with NaOH according to the following (unbalanced reaction). NaOH(s) + CO2(g) → Na2CO3(s) + H2O(l) Use the appropriate thermodynamic tables to calculate the
  68. Chemistry

    How would I go about doing this problem? 146 mL of wet H2 gas is collected over water at 29.0 degrees C and room pressure of 750 torr. Give the volume of the dry H2 gas collected at STP, give the mass of the dry H2 collected, and give the volume of the dry
  69. medical terminology/exercise science terminology

    how does the body adapt to aerobic exercise a.by increasing blood pressure when a person isn't exercising b.by increasing the heart rate when a person isn't exercising c.by decreasing the heart rate when a person isn't exercising d.by decreasing blood
  70. Physics

    In the process of changing a flat tire, a motorist uses a hydraulic jack. She begins by applying a force of 49 N to the input piston, which has a radius r1. As a result, the output plunger, which has a radius r2, applies a force to the car. The ratio r2/r1
  71. CHEM

    A) a picture shows a container that is sealed at the top by a movable piston. Inside the container is a ideal gas at 1.00atm , 20.0 *C, and 1.00L. (The pic is of a 2L container which has a piston pushed downward to the 1L level. Under the piston, under the
  72. Thermodynamics

    The initial state consists of a closed system containing one mole of super-heated liquid water at 115°C and 1 atmosphere pressure. The immediate surroundings are also at 115°C and 1 atmosphere pressure. The change in state is described as this one mole
  73. math/science

    Please can you explain how to do the following: a) a non-smoker with low blood pressure has a plasma chloesterol concentration of 5mmol per litre. Over a period of time this concentration increases to 8mmol per litre. By how many times has this risk of
  74. Chemistry Check

    The Synthesis of hydrogen chloride is written H2+Cl2==>2HCl. 3L of hydrogen are used and all gasses are at STP. The volume of HCL produced in the reaction would be _______ L. would the answer be 5.96? Three liters of H2 yields six liters of HCl, from
  75. Chemistry

    A 35.00 mL sample of water at 30.0°C is placed in an open container with an external pressure of 1.00 atm. 30.0 kJ of heat is added to the water sample. The density of water is 1 g/mL. (a) How many grams of liquid water remain at the end of the process?
  76. Physics

    I have a few physics questions that I don't understand. Two are thermal expansion problems and the other is an ideal gas law problem. 1. Two rods, one made of iron and the other of aluminum, have the same initial length at 64.00 deg. C? When the
  77. Chemistry

    The vapor pressures of ethanol (C2H5OH) and 1-propanol (C3H7OH) are 100 mmHg and 37.6 mmHg, respectively. Assume ideal behavior and calculate the partial pressures of ethanol and 1-propanol at 35 degrees Celsius over a solution of ethanol in 1-propanol, in
  78. AP CHEMISTRY

    The molar mass of an unknown organic liquid (M~100) is determined by placing 5 mL of the liquid in a weighed 125-mL conical flask fitted with a piece of Al foil with a pin hole in it. The flask is heated in a boiling water bath until the liquid evaporates
  79. chem

    How do these things shift the direction of a chemical reaction?: -adding/removing reactants -adding/removing products -adding/removing energy This is how I think I understand it: -adding more reactants pushes it to the right -removing reactants pushes it
  80. Chemistry

    At a certain temperature, the solubility of N_2 gas in water at 2.38 atm is 56.0 mg of N_2 gas/100 g of water. Calculate the solubility of N_2 gas in water, at the same temperature, if the partial pressure of N_2 gas over the solution is increased from
  81. chemistry

    The figure shows a cube of air at pressure 1.0 atm above a hot surface on Earth. Contact with the hot surface causes the volume of the air to expand from 2.00 × 105 L to 2.20 × 105 L by the transfer of 8.2 × 106 J of heat. Assume the systems are
  82. Chemistry

    A <---> 2B + C at a certain temperature the equilibrium pressure of the system is 0.318atm. Determine Kp for this reaction. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2B + C = 0.318atm /3 = 0.106 CO2 = 0.106 atm NH3 = 2(1.06) atm =0.212 atm Kp = PNH3
  83. Chemistry (equlibrium direction) urgent

    Consider the endothermic reaction 2 NO(g) <-> N2(g) + O2(g) -If I decrease the volume of the vessel and increasing the total pressure in the vessel, what direction will the equilibrium will shift? (left/right) (I know that decreasing the volume would
  84. chemistry

    Did the equation do not know the 2nd questions"s answers for the problems a) 2O3(g) = 3 O2(g) + heat (O3 IS UNDERLINED) [6.0x10-1] [0.21] b) 2 CO2 (g) + heat = 2 CO(g) +O2(g) (CO IS UNDERLINED) [0.103] [0.024] [1.18 x10-2] c) NO2(g) + O2(g) + heat =NO (g)
  85. csun

    What will the pressure inside the container become if the piston is moved to the 1.60 L mark while the temperature of the gas is kept constant?
  86. math

    Find the pressure exerted by a waterbed with dimensions of 2 m x 2 m which is 30 cm thick. (hint: use density of water)
  87. chem

    Calculate the amount of heat transferred when 2.06 g of Mg(s) reacts at constant pressure. 2 Mg(s) + O2(g) ¨ 2 MgO(s) ƒ¢H = -1204 kJ
  88. Physics

    Where does it takes less time to boil eggs: in a pan of boiling water or in a pressure cooker?
  89. science

    If the pressure of 20.0 mL of a gas sample is increased by 4 times and the absolute temperature is doubled, what is the new volume?
  90. Science

    assume the pressure is kept constant if the volume of a gas quadruples, how does the absolute temperature change?
  91. Physics

    If 2.4 m3 of a gas initially at STP is compressed to 1.6 m3 and its temperature raised to 30oC, what is the final pressure?
  92. Physics

    Find the pressure exerted by a waterbed with dimensions of 2 m x 2 m which is 30 cm thick. (hint: use density of water)
  93. Physics II

    find the pressure at the bottom of a vessel 76cm deep when filled with a) water b)mercury (sp.g. 13.6)
  94. Science

    is there a chart available that show the vapor pressure of Isopropyl alcohol and water solutions at 68 degrees F ?
  95. PAVCS

    How many moles of gas are in a 20 liter scuba canister is 300k and pressure is 200 atm
  96. principles of physics

    Blood pressure is normally greater in your ____________________. A) arms.B) legs.C) head.D) feet.E) All the same
  97. Chemestry

    What is the molecular mass of a gas that has a density of 0.897 g/L if it exerts a pressure of 1.35 ATM and is that a temperature of 43.5°C?
  98. Physics

    Where does it takes less time to boils eggs: in a pan of boiling water or in a pressure cooker?
  99. life orientation

    Evaluate the extent to which peer pressure can impact negatively on intrapersonal conflict