osmotic pressure chemistry

10,993 results, page 66
  1. Math

    Chemistry of Life Multiple Choice 1. Which of the following form the main components of our body cells? carbohydrates and proteins fat and phosphorous proteins and iron nucleic acids and calcium 2. Organic compounds always contain______. water oxygen

    asked by Briana T on December 7, 2012
  2. Pharmacist information

    Pharmacists who are trained in the United States must earn a Pharm.D. degree from an accredited college or school of pharmacy. The Pharm.D. degree has replaced the Bachelor of Pharmacy degree, which is no longer being awarded. To be admitted to a Pharm.D.

    asked by Anonymous on April 24, 2011
  3. Thermodynamics

    A turbine operating under steady flow conditions receives steam at the following state: pressure 13.8 bar, specific volume 0.143 m^3/kg, specific internal energy 2591kJ/kg and velocity 30m/s. The state of steam leaving the turbine is as follows: pressure

    asked by Claire on June 3, 2010
  4. science

    How does the structure if an atom relate to how electric charges form? I don't quite understand the question. All electrons and protons have charges. The charges do not "form", they are already there. They are part of every atom. The attraction between

    asked by Jesie on January 12, 2007
  5. Chemistry

    43. List and describe three factors that influence solubility: (Source-wikipedia) The solubility of a given solute in a given solvent typically depends on temperature. For many solids dissolved in liquid water, the solubility increases with temperature up

    asked by mysterychicken on November 1, 2010
  6. Chemistry

    You do it by finding Uuh in the periodic table and knowing that it will have chemical properties that are similar to those in the group with it. Here is a periodic table on the web. Find element #116 and observe the other elements in the same group (O, S,

    asked by DrBob222 on February 5, 2007
  7. College Physics

    The four tires of an automobile are inflated to a gauge pressure of 2.0x10^5 Pa. Each tire has an area of 0.024m^2 in contact with the ground. Determine the weight of the automobile.

    asked by Samantha on October 17, 2010
  8. Chemistry

    A sample of nitrogen gas (N2) kept in a container of volume 11.7 L and at a temperature of 23.3°C exerts a pressure of 2.6 atm. Calculate the number of grams of gas present.

    asked by Sven on October 17, 2011
  9. chem

    A sample of nitrogen gas (N2) kept in a container of volume 13.3 L and at a temperature of 22.3°C exerts a pressure of 1.1 atm. Calculate the number of grams of gas present.

    asked by nicole on October 17, 2010
  10. chemistry

    the pressure exerted on a 240.ml sample of hydrogen gas at constant temerature is increased from 0.428 to 0.724.What will the final volume of the sample be?

    asked by shubreet on October 21, 2010
  11. chemistry

    The normal boiling point of acetone is 56.2 (degrees)C and the molar heat of vaporization is 32.0 kj/mol. At what temperature will acetone boil under a pressure of 50.0 mmHg?

    asked by Jim on June 21, 2010
  12. Physics

    The four tires of an automobile are inflated to a gauge pressure of 1.84E+5 Pa. Each tire has an area of 0.0237 m2 in contact with the ground. Determine the weight of the automobile.

    asked by Megan on March 15, 2011
  13. Chem

    What is the volume occupied by 24.4 g of argon gas at a pressure of 1.31 atm and a temperature of 464 K? n=24.4g P=1.31atm T=464 Find V i tried working it out and i got 7091.98 and is inncorrect can i get some help?

    asked by Amy on October 15, 2010
  14. ap chemistry

    A sample of gas occupies 4 mL at STP. At what pressure would this sample occupy 500 mL if the temperature is changed to 525C? Answer in units of torr

    asked by cheri on February 10, 2013
  15. chem

    A reaction yields 0.00704 mol of O2 gas. What volume will the gas occupy if it is collected at 16.0◦C and 0.767 atm pressure? Answer in units of mL

    asked by reis on May 31, 2014
  16. chemistry

    a sample of gas occupies 1910ml at -22.8 degrees C and 740 torr. what volume would it occupy at the same pressure and 285 degrees C? answer units in ml

    asked by Taylor on August 31, 2011
  17. chemistry

    A sample of nitrogen gas has the temperature drop from 250°C to 150°C at constant pressure. What is the final volume if the initial volume is 310 mL?

    asked by pari on July 30, 2014
  18. chemistry

    c2h4(g) + 3O2(g) -> 2 CO2 (g) + 2 H2O (g) What volume of oxygen will react with 18 ml of ehtylene, c2h4, assuming that the gases are present at the same temperature and pressure?

    asked by Monica on April 19, 2010
  19. chem

    A gas occupying 10 mL at standard conditions is heated to 10◦C while the pressure is reduced to 0.92114 atm. What is the new volume occupied by the gas? Answer in units of mL

    asked by a on May 31, 2014
  20. Physics

    0.490 mol of argon gas is admitted to an evacuated 50.0 cm^3 container at 60.0 C. The gas then undergoes an isochoric heating to a temperature of 400 C. What is the pressure?

    asked by Joe on January 27, 2011
  21. chemistry

    The melting of 0.140 g of Br2 (which occurs at -7.2 C at 1 atm pressure) absorbs 9.43 J of heat. Compute the enthalpy change in 2.00 mol of Br2 when it freezes.

    asked by rafay on September 2, 2011
  22. Chemistry

    Benzene has a heat of vaporization of 30.72kJ/mol and a normal boiling point of 80.1 ∘C. At what temperature does benzene boil when the external pressure is 480torr ?

    asked by Connor on April 7, 2014
  23. thermodynamic

    Calculate the work necessary to compress air in an isolated cylinder with initial and final volumes of 6.0 and 1.2 ft^3, respectively. The initial pressure and temperature are 30.0 psia and 50 degree F, respectively.

    asked by chris on January 16, 2011
  24. chemistry

    If a scuba diver's lungs have a normal capacity of 4.9 L at sea level (1.0 atm), what would be the volume of her lungs if the pressure at a depth of 50 ft is 975 mmHg?

    asked by Leeya on April 9, 2014
  25. chemistry

    A chemical reaction produced a 0.311 g sample of gas which occupied 225 mL at 55 C exerting a pressure of 886 mm Hg. What is the molar mass of the gas?

    asked by JScholz on August 4, 2013
  26. Physics

    A man of mass 75 kg lies on a bed of 10,000 nails. The tip of each nail has an area of 1.0 square millimeter. What pressure does the man experience? [g=10 N/kg]

    asked by Erin on April 12, 2014
  27. 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?

    asked by peyton on February 27, 2013
  28. science

    an elephant of mass 500kg stands with all four feet on the ground. each foot has an area of 0.08m^2.calculate the pressure exerted on the ground.[g=10m/s^2]

    asked by kwame on October 17, 2014
  29. chemistry

    A chemical reaction produced a 0.311 g sample of gas which occupied 225 mL at 55 C exerting a pressure of 886 mm Hg. What is the molar mass of the gas?

    asked by JScholz on August 4, 2013
  30. Chem

    A bicycle pump inflates a tire whose volume is 577 mL until the internal pressure is 627 kPa at a temperature of 21.7°C. How many moles of air does the tire contain?

    asked by Sam on December 18, 2014
  31. Chemistry

    88-L sample of dry air cools from 197 degree celsius to -48 degrees celsius while the pressure is maintained at 2.93 atm. what is the final volume?

    asked by Dyonna on October 23, 2014
  32. physics(check my answers)

    in a piston is locked in place and the cylinder is placed in a boiling water, the temperature, pressure, internal energy are all increase if a piston is being pushed inward, would it have the same answer as above

    asked by bme1 on May 26, 2010
  33. Chemistry

    Consider the decomposition of barium carbonate: BaCO3(s)= BaO(s) + CO2(g). Using data from Appendix C in the textbook, calculate the equilibrium pressure of CO2 at 298K.

    asked by Jona on March 31, 2013
  34. CHEMISTRY

    Method for getting correct answer? Thank you! Initially there were equilibrium concentrations of 0.1887 M A, 0.1042 M B. Which of the equations below is correct if the pressure decreased by a factor of 2.40? Use the reaction below. 6A(g) ↔ 5 B(g) a. Qc =

    asked by Chemistry on April 6, 2014
  35. physics

    I have a Pressure in atm and a volume in liters how do i find the temperature in kelvins?? I know the formula pv=nRT works...but i don't know the number of moles so... I don't know what to do.

    asked by Katy on May 5, 2010
  36. chemistry

    calculate the concentration of CO2, in a soft drink after the bottle is opened and equilibriates at 25C under a CO2 partial pressure of 0.0003 atm.

    asked by Kyle on January 6, 2015
  37. Chemistry

    Under constamt-pressure conditions a sample of hydrogen gas initially at 93 degress celcius and 8.1 L is cooled until its final volume is 1.7 L. What is the final temperature?

    asked by Amanda on June 20, 2010
  38. Chemistry

    Consider the following chemical equation. Cl2(g) + O2(g) → Cl2O3(g) Assuming all gases are at the same temperature and pressure, how many milliliters of oxygen gas must react to give 3.50 L of Cl2O3?

    asked by Kalen on December 6, 2010
  39. ahemistry

    a sample of waterunder study was found to boil at 102c at normal temperature and pressure.is the water pure?will the water freeze at 0c. comment

    asked by anson on September 5, 2011
  40. chemistry

    a sample of waterunder study was found to boil at 102c at normal temperature and pressure.is the water pure?will the water freeze at 0c. comment

    asked by anson on September 5, 2011
  41. Chemistry

    N2(g) + O2(g) → N2O5(g) What volume of oxygen gas reacts to yield 750.0 cm3 of N2O5? The reaction conditions are 350°C and 2.50 atm pressure

    asked by Harry on February 2, 2014
  42. Chemistry

    What pressure (in atmospheres) will be exerted by 1.3 moles of gas in a 13 litre flask at 22 degrees Celcius? (Gas constant (R) = 0.0821 L atm K^-1 mol^-1)

    asked by Anonymous on May 18, 2014
  43. science question

    please check i think its B or D. Under which conditions are clouds formed from ice crystals? A.strong winds B.high altiude C.low humidity D.high pressure

    asked by matt on May 15, 2014
  44. chemistry

    A weather balloon is filled with 0.295 m3 of helium on the ground at 18 °C and 756 torr. What will the volume of the balloon be at an altitude of 10 km where the temperature is 48 °C and the pressure is 0.14 atm?

    asked by jun on November 5, 2014
  45. problem

    Benzene has a heat of vaporization of 30.72 kj/mol and a normal boiling point of 80.1. At what temperature does benzene boil when the external pressure is 480 torr?

    asked by Anonymous on July 18, 2011
  46. chemistry

    555 mL sample of nitrous oxide at 25 degree celsius is heated to 50 degrees celsius. If the pressure remains constant, what is the final volume?

    asked by Anonymous on July 19, 2011
  47. 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

    asked by Megan on May 2, 2010
  48. CHEMISTRY

    Method for getting correct answer? Thank you! Initially there were equilibrium concentrations of 0.1887 M A, 0.1042 M B. Which of the equations below is correct if the pressure decreased by a factor of 2.40? Use the reaction below. 6A(g) ↔ 5 B(g) Qc =

    asked by Chemistry on April 6, 2014
  49. Chem

    A 500 -cm3 flask contains 0.420g of a gas at a pressure of 160kPa and a temperature of 330K. What is the molecular mass of this gas? M=____g/mol? Ty

    asked by Brady on April 16, 2014
  50. Calsius-Clapeyron Equation

    The vapour pressure of methyl alcohol is 40 mmHg at 5°C. Use this value and the calsius-clapeyron equation to estimate the normal boiling point of mythl alcohol.

    asked by need help on February 6, 2009
  51. literature

    i have to write a persuasive essay on obesity, can you just name some problems or diseases that most obese people have: like i know diabetes is one blood pressure (high?) heart problems.... what else?

    asked by literature on March 18, 2009
  52. chemistry

    A bacterial culture isolated from sewage produced 35.5 mL of methane, CH4, at 31oC and 1 atm. What is the volume of this methane at standard temperature and pressure?

    asked by Anonymous on April 18, 2012
  53. Physics

    I hope someone can help me, cause i am so confused. Pressure gradient-why can't submarines go to the bottem of the ocean? please help! Stop the multiple posts. I am a volunteer, and it is a waste of time to go through the same posts.

    asked by Georgia on May 7, 2007
  54. Chemistry

    A good vacuum pump on Earth can produce a vacuum with a pressure as low as 1.96 × 10-8 torr. How many molecules are present in each milliliter at a temperature of 23.0ºC?

    asked by Hunter on October 28, 2016
  55. Chemistry

    KClO3 decomposes according to the reaction below. How many grams of KClO3 are needed to produce 826ml of O2 at standard temperature and pressure? 2KClO3 → 2KCl + 3O2

    asked by Sarah on April 22, 2017
  56. 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?

    asked by YeJi Lee on October 23, 2012
  57. Science

    Under which conditions are clouds formed from ice crystals? A.strong winds B.high altitude (MY ANSWER) C.low humidity D.high pressure

    asked by LOVE on January 28, 2016
  58. ap chem

    : 1.0 L of an unknown gas was allowed to effuse through a small opening under constant pressure conditionssuppose you have two 1-liter flasks, one containing n2 at STP, the other containing CH4 at STP

    asked by davy on February 16, 2012
  59. Physics

    A car of four tyres of area 0.06m2 are in contact with the road. Calculate the maximum pressure exerted by each tyre if the car weighs 1200N.

    asked by Mercy on October 25, 2018
  60. chemistry

    A helium balloon has a volume of 2.50L at STP. If it's released and rised to an elevation at which pressure is 0.285 atm, and the temperature is -35 degrees. What's the new volume?

    asked by sarah on January 16, 2012
  61. Chem

    A sample of gas of mass 2.929 g occupies a volume of 426 mL at 0degree Cel and 1.00 atm pressure. What is the molecular weight of the gas? Thanks!

    asked by Peter on March 9, 2010
  62. Physics

    A monatomic ideal gas expands from 1.00m^3 to 2.50m^3 st a constant pressure of 2.00x10^5 Pa. Find the change in the internal energy of the gas.

    asked by A on November 23, 2012
  63. Health/Specialty Exams and Advance Techniques

    please see if I am correct thanks True or False Glaucoma, a condition caused by increased pressure in the eye, is discovered by an ophthalmologic exam I picked True

    asked by Salena on April 22, 2008
  64. Physics

    2. The average atmospheric pressure at sea level is approximately 101 000 Pa. If the density of air at 0◦C is approximately 1.3 kg , how high does the atmosphere extend?

    asked by Merdreik on October 31, 2016
  65. science

    (a) What is the name of weather systems centered about regions of low pressure? (b) In what direction do winds in the northern hemisphere spiral around such a region? (c) In the southern hemisphere?

    asked by Shirley on October 30, 2011
  66. Chemistry

    An ideal gas confined in a cylinder by a movable piston at 25°C and 150 KPa is heated at constant pressure to 38°C. The Cp of the gas is (7/2)R. Calculate: AH, AU, Q and W in J/mol

    asked by Anonymous on September 30, 2018
  67. Physics

    A monatomic ideal gas expands from 1.00m^3 to 2.50m^3 st a constant pressure of 2.00x10^5 Pa. Find the change in the internal energy of the gas.

    asked by A on November 23, 2012
  68. Physics

    A monatomic ideal gas expands from 1.00m^3 to 2.50m^3 st a constant pressure of 2.00x10^5 Pa. Find the change in the internal energy of the gas.

    asked by B on November 24, 2012
  69. chem

    Of the floowing compound, which would you exoect to have the lowest vapor pressure at room temperature: CHCl3 CH2Cl2 CH3Cl CCl4 From my result I think it is CH2Cl2

    asked by Ron on June 11, 2007
  70. Chemistry

    Calculate the change in entropy (in J/K) when 61.4 g of nitrogen gas is heated at a constant pressure of 1.50 atm from 25.8 ºC to 92.8 ºC. (The molar specific heats are Cv is 20.8 J/(mol-K) and Cp is 29.1 J/(mol-K) .)

    asked by June on March 31, 2015
  71. chemistry

    As the temperature of a gaseous substance is decreased at constant pressure, it will undergo a series of physical changes. Which is the correct sequence of physical states that will be encountered?

    asked by erica on January 20, 2012
  72. physics

    When water freezes, it expands about 8.60%. What would be the pressure increase inside your automobile engine block if the water in it froze? The bulk modulus of ice is 2.00 * 10^9 N/m2.

    asked by Anonymous on January 31, 2013
  73. chemistry

    What is the vapor pressure of CS2(in mmHg) at 18.5degree C? Carbon disulfide, CS2, has Pvap= 100mm at -5.1 degree C and change in Hvap = 28.0 kj/mol .

    asked by Lauren on January 26, 2010
  74. Chemistry

    what volume of oxygen gas measured at 25C and 760 torr is required to react with 1.0L of methane measured under the same conditions of temperature and pressure?

    asked by Mitch on March 24, 2012
  75. Chem II/College

    Using the Clausius Clapeyron equation determine the vapor pressure of water at 50.0 degrees C. The molar heat of vaporization of water is 40.7 kJ/mol. How do you solve this?

    asked by Bianca on October 7, 2012
  76. Chemistry

    A flask that can withstand an internal pressure of 2.50X103 torr, but no more, is filled with a gas at 21.0°C and 758 torr and heated. At what temperature will it be maximum before it will burst?

    asked by Anonymous on November 16, 2018
  77. Physics

    A cyclist and his bicycle have a combined mass of 55kg. Total area of the tyres in contact with the road is 2.2 in contact with pressure exerted by the two on the ground.

    asked by Angie on February 15, 2017
  78. chemistry

    What is the volume occupied by 0.118 mol of helium gas at a pressure of 0.97atm and a temperature of 32 degrees celius? R=0.0821 L atm/mol K

    asked by Tracey on April 18, 2010
  79. chem

    why would it be dangerous to heat a liquid in a distillation apparatus that had no vent or opening to the laboratory? - is this because the liquid will create vapor pressure and could cause a serious injury to a student?

    asked by Jason on November 3, 2008
  80. Physics

    A pipe contains water at 4.80 105 Pa above atmospheric pressure. If you patch a 3.55 mm diameter hole in the pipe with a piece of bubble gum, how much force must it be able to withstand?

    asked by Lauren on December 13, 2012
  81. Earth's Dynamic Atmosphere

    What is the mainstream unit of measuring air pressure? A. Inches of mercury B. PSI C. Pounds per square foot D. Centimeters of mercury my answer is a.

    asked by Prisila on December 26, 2017
  82. physics

    Use R = 8.2 × 10–5 m3 atm/mol K and NA = 6.02 × 1023 mol–1. The approximate number of air molecules in a 1 m3 volume at room temperature (300 K) and atomospheric pressure is:

    asked by sam on June 24, 2009
  83. Physics

    A monatomic ideal gas expands from 1.00m^3 to 2.50m^3 st a constant pressure of 2.00x10^5 Pa. Find the change in the internal energy of the gas.

    asked by S on November 22, 2012
  84. Chemistry

    Which of the following reactions will result in a reduced total pressure? a. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) c. 2HI(g) → H2(g) + I2(g) b. 2N2O(g) → 2N2(g) + O2(g) d. 2H2(g) + O2(g) → 2H2O()

    asked by Brittany on November 6, 2012
  85. physics

    Estimate the pressure exerted on the floor by a 75 kg store clerk standing momentarily on a single heel of their shoe, where the heel area = 6 cm square?

    asked by ted on November 30, 2011
  86. chemistry

    a 0.25-g sample of a liquid was vaporized at 100 degree celcius. The vapor occupied 125 ml under a pressure of 0.96 atm. What is the molecular weight of the liquid?

    asked by Tam on February 22, 2012
  87. physics

    Suppose a tank contains 714 m3 of neon (Ne) at an absolute pressure of 1.01×10^5 Pa. The temperature is changed from 293.2 to 294.7 K. What is the increase in the internal energy of the neon?

    asked by tina on May 8, 2017
  88. science

    Urea forms a ideal solution in water. Determine the vapour pressure in an aqua solution containing 10 percent bymass at 40degree Celsius

    asked by priya on October 27, 2016
  89. chemistry

    Which part(s) of the reaction 2O3(g) 3O2(g) will be favored by an increase in the total pressure (resulting in compression)? 2. Neither is favored. 3. Unable to determine 4. reactants

    asked by please help on March 29, 2012
  90. chemistry

    Calculate the partial pressure (in atm) of propane in a mixture that contains equal weights of propane (C3H8) and butane (C4H10) at 18°C and 746 mmHg

    asked by Anonymous on November 21, 2011
  91. physics

    A submarine is constructed so that it can safely withstand a pressure of 1.6 x 107 Pa. How deep may this submarine descend in the ocean if the average density of seawater is 1025 kg/m3.

    asked by Jimmy on December 13, 2009
  92. chemistry

    155.0 grams of N2 (nitrogen gas) are put in a 4.50L container at 35C. What is the pressure? PV=nRT n=155/molmassN2 Convert temps to K.

    asked by TIFFANY on January 9, 2007
  93. chemistry

    what volume of hydrogen sulfide is produced by reaction of 0.5 mole of sodium sulfide with hydrochloric acid at a temp. of 20C and a pressure of 722 mm.

    asked by Kimberly on April 13, 2012
  94. Exam

    Hello I have exams coming up and I was wondering if any of you guys know where I can get some practice exam papers or questions that I can do or download from the internet. I am in year 11, high school, and I have exam on geometry and trigonometry, intro

    asked by Jarin on May 14, 2007
  95. Chemistry

    We have been getting numerous questions like this on assignments and I can't figure them out. Its like I know that there some way connected but I can't figure it out. This is for Chemistry in highschool and its likea review and so they are not going over

    asked by Tracy on September 17, 2006
  96. science

    Consider the following reaction: CH3X + Y --> CH3Y + X At 25ºC, the following two experiments were run, yielding the following data: Experiment 1: [Y]0 = 3.0 M [CH3X] Time (hr) 7.08 x 10-3 M 1.0 4.52 x 10-3 M 1.5 2.23 x 10-3 M 2.3 4.76 x 10-4 M 4.0 8.44 x

    asked by Mariel on February 21, 2012
  97. logic and math

    Calculate the truth value (f or V) a. Is it true that if (the Papaya is a fruit from the Caricaseas or the Pitahaya is the fruit of a plat from the Cactaseas) then (el Cohombro is a fruit of a plant from the family of the Cucurbitaceas or the Nisper is a

    asked by JuanPro on March 28, 2014
  98. logic-math

    Calculate the truth value (f or V) a. Is it true that if (the Papaya is a fruit from the Caricaseas or the Pitahaya is the fruit of a plat from the Cactaseas) then (el Cohombro is a fruit of a plant from the family of the Cucurbitaceas or the Nisper is a

    asked by JuanPro on March 20, 2014
  99. Chemistry

    1.) A closed 5.00 L container is filled with a mixture of 4.00 moles of hydrogen gas, 8.00 moles of oxygen, 12.0 moles of helium, and 6.00 moles of nitrogen. What is the pressure in this container at a temperature of 25 °C? 2.) A closed 5.00 L container

    asked by Sunny on April 25, 2016
  100. Physics

    A heat engine has the three step cycle shown above. Starting from point A, 1 L (liter) of ideal gas expands in the isobaric (constant pressure) process A to B at P = 2 atm. B to C is isovolumetric process at V = 5 L, and C to A is an isothermal (constant

    asked by Jason on May 8, 2010