osmotic pressure chemistry

10,993 results, page 16
1. science

Calculate the partial pressure of oxygen gas a diver breathes with a heliox mixture containing 2% oxygen at a depth of 100 metres where the total pressure is 100kPa

asked by dennis on January 29, 2013
2. chemistry

a sample of gas is collected over water at a temperature of 35 degrees celcius when the barometric pressure reading is 742.0 torr what is the partial pressure of the dry gas?

asked by Jimmy on May 18, 2010
3. Chemistry

You have a 22L cylinder of helium at a pressure of 150atm and a temperature of 31C. How many ballons can you fill, each with a volume of 5.0L, on a day when the atmospheric pressure is 755mmHg and the temperature is 22C?

asked by Eric on September 28, 2009
4. Chemistry

Oxygen gas, from the decomposition of KClO3, was collected by water displacement. The pressure and temperature in the lab during the experiment were 451.0 torr and 20.0 C. What was the partial pressure of oxygen?

asked by Austin on March 18, 2014
5. Chemistry

CO+H2O CO2+H2 kp=0.0611 atm @2000K A reaction mixture initially contains a CO partial pressure of 1334 torr and H2O partial pressure of 1778 torr at 2000K. Whats the partial pressure of CO2 and H2? I got 381 torr for both, but its not correct.

asked by Anonymous on October 6, 2010
6. chemistry

The vapor pressure of water at 80 degrees c is 355mmHg. A 100cm3 vessel contained wateraturated oxygen at 80 degrees c., the total gas pressure being 760 mmHg. The contents of the vessel were transferred by pumping to a 50cm3 vessel at the same

asked by el on October 27, 2011
7. Chemistry

How do I find the total vapor pressure of a solution of benzene (mole fraction 0.350, vapor pressure at 25 degrees = 12.7 kPa) in toluene at 25 degrees. (vapor pressure of toluene at 25 degrees = 3.79 kPa)

8. Chemistry

At sea level we are under 15.8 pounds of pressure per square inch of our body. This is the equivalent of a 16 pound bowling ball at every inch of our body. Describe why we are not overcome by the pressure of the atmosphere? What experiment in our course

asked by Lisa on January 12, 2007
9. Physics

(a) An ideal gas occupies a volume of 1.6-cm3 at 20°C and atmospheric pressure. Determine the number of molecules of gas in the container. (b) If the pressure of the 1.6-cm3 volume is reduced to 1.6 10-11 Pa (an extremely good vacuum) while the

asked by Kelsey on April 26, 2010
10. chemistry

a 500ml sample of o2 gas at 24 degrees celsius was prepared by decomposing a 3% aqueous solution of hydrogen peroxide, in this presence of a small amount of manganese catalyst by the reaction 2H2O2>2H2O+O2. The oxygen thus prepared was collected by

asked by Michelle on April 16, 2012
11. CHEMISTRY

For the reaction I2 + Br2 2IBr Kc=280 at 150C . Suppose that 0.500 mol IBr in a 2.00-L flask is allowed to reach equilibrium at 150C . What is the equilibrium partial pressure of IBr? What is the equilibrium partial pressure of I2? What is the equilibrium

asked by TP on March 4, 2018
12. science - chemistry

Some heat is supplied to a mixture of ice and liquid water in a closed container and the contents of the container are thoroughly mixed. If, after the addition of heat, both ice and liquid water remain: A) the temperature of the system will increase B) the

asked by S on December 27, 2010
13. Physics

When you suddenly stand up after lying down for a while, your body may not compensate quickly enough for the pressure changes and you might feel dizzy for a moment. (a) If the gauge pressure of the blood at your heart is 15.02 kPa and your body doesn't

14. Physics HELP!!!!!!!!

Suppose 0.021 mole of an ideal monatomic gas has a pressure of 1.00 atm at 273.15 K and is then cooled at constant pressure until its volume is reduced by 41.1 %. What is the amount of work done by the gas?

asked by suzan on May 11, 2014
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

asked by Anonymous on November 8, 2010
16. chemistry

you have a metal tank containing 74.0moles of nitrogen gas at a pressure of 15.0atm.If the pressure is measured at a temperature of 20.0c,then the volume of the tank must be how many liters(Round answer to one decimal place.

asked by gloria on February 12, 2014
17. Chemistry

If 2.64g of CO2 dissolves in 500ml water at 25°C, what is the Kh(Henry's law constant) for CO2? The total pressure is 3340 mmHg and air pressure at 25°C is 680 torr.

asked by Jake on July 16, 2015
18. chem

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.

asked by vonsha on May 10, 2013
19. chem

.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. i really tried but i need help

asked by nene on May 23, 2013
20. science

calculate the minimum guage pressure required at the base of building of height 200m for water to reach a closed tank at the of the building at the gauge pressure of 500Kpa

asked by vutlhari on April 16, 2015
21. statistics

Assume that blood pressure readings are normally distributed with a mean of 123 and a standard deviation of 9.6. If 144 people are randomly selected, find the probability that their mean blood pressure will be less than 125

asked by Anonymous on November 8, 2011
22. 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

asked by Anonymous on October 14, 2010
23. 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

asked by Anonymous on October 9, 2010
24. rate of change

For a person at rest, the function p(t) = -20 cos(300˚t) + 100 models blood pressure, in millimeters of mercury ( mm Hg), at time t seconds. What is the rate of change in blood pressure at 3 s?

asked by sara on June 9, 2012
25. 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

asked by Anonymous on October 10, 2010
26. chem

Air trapped in a cylinder fitted with a piston occupies 162.2 mL at 1.08 atm pressure. What is the new volume when the piston is depressed, increasing the pressure by 25%? what is the answer? didnt understand?

asked by Brianna on March 25, 2017
27. thermodynamics and statistical machenics

A certain mass of a gas at 273k temperature and one atmospheric pressure is expanded to 3 times its original volume under adiabatic conditions.Calculate the resulting temperature and pressure( take the value of (gamma)= 1.4).

asked by gourav on March 26, 2015
28. Math

A hurricane wind blows across a 6.00 m times 15.0 m flat roof at a speed of 190 km/hr. Is the air pressure above the roof higher or lower than the pressure inside the house? Explain. Need help

asked by Catie on August 15, 2011
29. physics

fluid of constant density = 960 kg/m3 is flowing steadily through the above tube. The radius at the sections are r1 = 0.05 m, r2 = 0.04 m. The gauge pressure at 1 is P1 = 200 000 Pa and the velocity here is v1 = 5 m/s. We want to know the gauge pressure at

asked by Maha on March 25, 2017
30. thermodynamics and statistical mechenics

A certain mass of a gas at 273 k temperature and one atmospheric pressure is expanded to 3 times its original volume under adiabatic conditions.Calculate the resulting temperature and pressure ( take the value of (gamma) = 1.4 ).

asked by gourav on March 25, 2015

At o degrees celcius, a 1.0-L flask contains 5.0 x 10^-2 mol N2, 1.5 x 10^2 mg O2 and 5.0 x 10^21 molecules of NH3. What is the p00artial pressure of each gasnand what is the total pressure in the flask? I need to understand how to calculate it, formula

asked by KL on May 5, 2012
32. Chemistry

A mixture of gases containing equal weights of carbon dioxide, carbon monoxide, and ammonia exerts an overall pressure of 450.0 torr. What pressure is exerted by each gas individually??

asked by jessica on May 29, 2010
33. statistics

Assume that blood pressure readings are normally distributed with a mean of 123 and a standard deviation of 9.6. If 144 people are randomly selected, find the probability that their mean blood pressure will be less than 125.

asked by florence on October 14, 2013
34. chemistry

a gas is collected over water at 18 degrees celsius at a pressure 755mm. what is the partial pressure of the gas?

asked by finn on March 23, 2010
35. Chem

What is the volume of a gas that exerts a pressure of 457 mm Hg, if it excerted a pressure of 250 atm when its volume was 25.0 ml.

asked by Chris on June 29, 2011
36. Chemistry

A sample of gas is placed in a container at 25 degrees C and 2 atm of pressure. If the temperature is raised to 50 degrees C, what is the new pressure?

asked by Cat on February 17, 2011
37. chemistry

a gas is collected over water at 18 degrees celsius at a pressure 755mm. what is the partial pressure of the gas?

asked by finn on March 23, 2010
38. Physics

A welding tank has a gauge pressure of 2000psi at 40.0°F. What is the new gauge pressure if the temperature rises to 100°F?

39. physics

How does the water pressure .5m below the surface of a small pond compare to the pressure .5m below the surface of a large lake?

asked by Ben on January 11, 2012
40. Science

True or False. Winds usually move from areas of low pressure to areas of high pressure.

asked by Idk. on May 12, 2015
41. Chemistry

How would i figure out the vapor pressure at room temperature? (atmospheric pressure is 760 mm hg and the temperature is 20C.)

asked by Anonymous on February 11, 2008
42. Chem

What is the mole fraction of H2 in a mixture with the total pressure of 800 torr when the partial pressure of H2 is 90 torr?

asked by Chris on June 29, 2011
43. science

an air sample contains 0.046% CO2 if the total pressure is 760mmHg what is the partial pressure of CO2

asked by diana on November 4, 2010
44. chemistry

A pressurised can of whipped cream has an internal pressure of 1.09x105 Pa at 25.0 oC. If it is placed in a freezer at -15.0 oC, what is the new value for its internal pressure (in Pa)? explain to me! thanks

asked by write2khin on May 2, 2010
45. vapor pressure

Vapor pressure is the pressure exerted by a vapor when condensation (, or =) evaporation over its liquid in a closed system = =

asked by yayhawknelson on January 18, 2007
46. Chemistry help!!!!

A gas occupies 200ml volume at a pressure of 760 mm. what volume would it occupy at a pressure of 800mm.

asked by Fatihisko on April 13, 2012
47. Chemistry

The solubility of a gas at 7.0 atm of pressure is 0.52 g/L . How many grams of the gas would be disolved per 1.0 L if the pressure increased 40.0 percent?

asked by Joy on March 4, 2013
48. Chemistry -need help in solving problem

The solubility of a gas at 7.0 atm of pressure is 0.52 g/L . How many grams of the gas would be disolved per 1.0 L if the pressure increased 40 percent?

asked by Joy on March 4, 2013
49. chemistry

A quantity of gas has a volume of 121 L when confined under a pressure of 2.50 atm at a temperature of 20.0 C. At what pressure will its volume be 30.0 L at 25.0 C?

asked by garrett on February 24, 2012
50. Chemistry

A mixture of gases is made up 0.48 mol of Ar and 0.94 mol of N2 with a total pressure of 1.68 atm. What is the partial pressure of Ar?

asked by Eddie on March 4, 2014
51. chemistry

At 0*C a 1.0-L flask contains 5.0 x 10^-2 mol N2, 1.5 x 10^2 mg O2, and 5.0 x 10^21 molecules of NH3. What is the partial pressure of each gas, and what is the total pressure in the flask?

asked by Brittany on March 1, 2013
52. Chemistry

A scuba diver takes a 2.3 balloon from the surface, where the pressure is 1.1 and the temperature is 28, to a depth of 35 , where the pressure is 4.5 and the temperature is 14.

asked by Mary on March 19, 2013
53. Science-Weather

Do the pressure systems in the Arctic move at the same speed as the pressure systems in the south? If so, why is this? I not sure about this question. I think there different, but i am not positive.

asked by Salina on May 6, 2008
54. Chemistry

A gas has a pressure of 710 kPa at 227 Celsius. What will its pressure be at 27 Celsius, if the volume does not change?

asked by Terry on May 7, 2012
55. chemistry

a mixture of gases contains 0.4 mole of N2, 0.5 moles of O2, and 0.7 moles of H2. What is the partial pressure of O2 if the total pressure is 1.3 atm?

asked by Sammy on October 19, 2010
56. Chemistry

An air sample contains 0.038% CO2. If the total pressure is 764 mm Hg , what is the partial pressure of CO2?

asked by ellen on April 16, 2010
57. chemistry

The partial pressure of O2 in your lungs varies from 25 mm Hg to 40 mm Hg. What mass of O2 can dissolve in 1.0L OF water at 25.0oC when the O2 partial pressure is 40. mm Hg?

asked by jojo on August 24, 2014
58. chemistry

A gas is collected over water at 20 degrees Celsius at a pressure of 752 mm. What is the pressure of the pure gas?

asked by Jill on November 29, 2012
59. Chemistry

A mixture of gases contains 0.4 mole of N2, 0.5 moles of O2, and 0.7 moles of H2. What is the total pressure if partial pressure of O2 is 1.3 atm?

asked by HELP!!! on March 15, 2012
60. CHEM

Vapor pressure is the pressure exerted by a vapor when condensation: A. < B. = C. > evaporation over its liquid in a closed system.

asked by joey on February 1, 2009
61. chemistry

the vapor pressure of pure water at 60 c is 157 mmHg. what is the vapor pressure of this solution at the same temperature, in mm Hg?

asked by angel on August 26, 2014
62. college chemistry

A closed container is filled with oxygen. The pressure in the container is 325 . What is the pressure in millimeters of mercury?

asked by Tiffany on July 7, 2010
63. Physics

A 1.45 mol sample of an ideal gas (γ = 1.40) is carried through the Carnot cycle described in the figure below. At point A, the pressure is 28.5 atm and the temperature is 600 K. At point C, the pressure is 1.00 atm and the temperature is 400 K. How do I

asked by Alex on June 7, 2011
64. chemistry

An Ideal solution is formed by mixing 0.26 mol of pentane (vapor pressure + 511 torr) with 0.34 mol of hexane (vapor pressure = 150 torr). What is the total vapor pressure of the ideal solution?

asked by Anonymous on March 6, 2014
65. chemistry

A gas 'x' is collected over water at 17 degree celcius and 750 mm pressure.If the volume of the gas collected is 50 cc then calculate the volume of the dry gas at standard temperature pressure and at 17 degree celcius the vapour of pressure is 14 mm

asked by Samay on September 14, 2011
66. Chemistry II (College)

How would I go about solving this problem? Can someone show me an equation that can be used? The decomposition of dimethyl ether at 504°C is a first-order reaction with a half-life of 27 min. (CH3)2O(g) CH4(g) + H2(g) + CO(g) (a) What will be the partial

asked by Tim on March 12, 2010
67. Chemistry

472 mL of H2 was collected over water when 1.256g Zn reacted with excess HCl. The atmospheric pressure during the experiment was 754 mmHg and the temp was 26C. What is the pressure in atm of the dry hydrogen gas in the mixture. I don't know how to answer

asked by Stan on June 29, 2015

Question: 0.37 litre of an ideal monatomic gas (Cv,m = 3R/2) initially at 51 °C and 36 atm pressure undergo an expansion against a constant external pressure of 1.06 atm, and do 2.3 kJ of work. The final pressure of the gas is 1.06 atm. Calculate the

asked by Ashley on January 23, 2016
69. Chemistry

How do I solve this? The usual partial pressure of oxygen that people get at sea level is .20 atm, that is, a fifth of the usual sea level air pressure. People used to 1 atm air pressure begin to become light headed at about .10 atm oxygen. As a rule of

asked by Avalon on March 31, 2010
70. Chemistry

How do I solve this? The usual partial pressure of oxygen that people get at sea level is .20 atm, that is, a fifth of the usual sea level air pressure. People used to 1 atm air pressure begin to become light headed at about .10 atm oxygen. As a rule of

asked by Avalon on March 31, 2010
71. Chemistry

How do I solve this? The usual partial pressure of oxygen that people get at sea level is .20 atm, that is, a fifth of the usual sea level air pressure. People used to 1 atm air pressure begin to become light headed at about .10 atm oxygen. As a rule of

asked by Avalon on March 31, 2010
72. Chemistry

Samples of Neon and helium are placed in separate containers connected by a pinched rubber tube. There is 5.00 liters of neon at a pressure of 634 mm Hg in the first container. The second container has 3.00 liters of helium at 522 mm Hg. When the clamp is

asked by T on February 18, 2011
73. Chemistry

Explain why a model of the atom is crucial to understanding chemistry and in explaining the behavior of matter.

asked by Dean on May 24, 2018
74. Clinical Chemistry

Anyone here good with clinical chemistry, particularly separation assays and high performance liquid chromatography?

asked by James on April 17, 2013

i need help on Chemistry and i am in 7th grade i don't know how to do some problems and i would like to know how to translate statements into equation form?

asked by Hope on January 23, 2010
76. Chemistry

Tell me a website from where i can get full information regarding IUPAC nomenclature of organic chemistry. It's rules, inforamtion everything.

asked by Akash on April 8, 2009
77. Chemistry

This is question 4a on section a.12 chemistry. What will you observe happening to the balloon as it sits in the warm car

asked by Anonymous on February 4, 2013
78. For Dr.Bob

You helped me with a question, but I got stuck/didn't get the correct answer. I replied, can you have a look (under chemistry...part 2). Thank you!

asked by Duffy on May 20, 2009
79. Science

Does nuclear chemistry involve protons and neutrons to create a huge amount of energy?

asked by Kathy on September 3, 2018
80. Chemistry

For my Chemistry question it's about herbicide's What do they do? what are they intended for? what risk's do they pose in our society? how are they created? if anyone could answer these please thanks you!

asked by Steven Andersen on January 20, 2012
81. chemistry

can you give me examples of pictures just name it, ummm.. CHEMISTRY IN DAILY LIVING , TECHNOLOGY AND SOCIETY

asked by Anonymous on July 25, 2011
82. Chemistry

Please help-I need to give at least three examples of how heat, solutions,equillibrium, nuclear and organic chemistry are interrelated. Thank you

asked by Aubrey on June 1, 2010
83. Chemistry

Please help-I need to give at least three examples of how heat, solutions,equillibrium, nuclear and organic chemistry are interrelated. Thank you

asked by Aubrey on May 31, 2010
84. Chemistry

Does anyone know a website with practice problems (and answers) regarding quantitative chemistry? I haven't been able to find anything on Google.

asked by Syndra on October 16, 2014
85. college

A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of cyclopropane in the mixture is 334 mm Hg and the partial pressure of the oxygen is 1.02 atm, what is the total pressure of the mixture in torr?

asked by malik on November 13, 2010
86. chem

For the reaction: PCl3(g) + Cl2(g) --> PCl5(g) at 85 degreeC, Kp = 1.19 If one starts with 2.00 atm pressure of PCl3, 1.00 atm pressure of Cl2 and no PCl5, what is the partial pressure of PCl5(g) at equilibrium?

asked by jack on March 12, 2008
87. chem

A 2.5L flask @ 15 degrees C cntains three gases. The partial pressure of N2 is 0.32 atm, and the partial pressure of the other two gases, He and Ne are 0.15 atm and 0.42atm respectivly. What is the total pressure in atm on the 2.5L flask?

asked by ALEX6 on April 26, 2011
88. science

Which of the following would most likely cause rising air? A warm air and low pressure B cold air and low pressure C warm air and high pressure D cold air and high pressure Please give us the answer.

asked by miki on March 25, 2012
89. chemistry

Nitroglycerine decomposes according the the equation: 4C3H5(NO3)3 -> 12 CO2 + 10 H2O +6N2 + O2. 15.0 g of nitroglycerine is placed in a 500 ml flask at 25.0 C. The vapor pressure of water at this temperature is 23.8 mmhg. Find the total pressure in the

asked by Ben on March 15, 2010
90. CHEM HELP

The partial pressure of water above a solution of water and a nonvolatile solute at 25oC is 19.2 mm Hg. What is the mole fraction of the solute please help....I really don't know how I am supposed to solve this question. I know that Partial pressure of the

asked by jerry on February 14, 2009
91. Chemistry PLS HELP!!!

A student collects oxygen gas by water displacement at a temperature of 17 Celsius. A barometer reads 92.3 kPa. What is the pressure of the water vapor? Look it up on a water vapor pressure chart. What is the pressure of the oxygen gas? (Answer: ~14.0 mmHg

asked by Ana on March 29, 2016
92. Chemistry

Suppose a mixture of hydrogen and oxygen gas is exerting a pressure of 1.60 atm. If the partial pressure of oxygen in the mixture is 304 mmHg atm, what is the partial pressure of the hydrogen?

asked by Amber on November 6, 2010
93. Chemistry HELP!!

A mixture of 0.154 moles of C is reacted with 0.117 moles of O2 in a sealed, 10.0 L vessel at 500 K, producing a mixure of CO and CO2. The total pressure is 0.640 atm. What is the partial pressure of CO?

asked by Toni Jones on March 31, 2011
94. Science

PRessure is measured in Pascals (Pa). What combination of units is the same as a Pascal? and When you exert a force on a fluid in a closed container, does the pressure increase, decrease or remain constant? I think it will increase, but I'm not totally

asked by Erika on May 31, 2011
95. chemistry

calculate the pressure in atm of a balloon filled with 7.5g of helium gas if the baloons volume decreases to 7.5L suppose the balloons pressure and volume are originally 799 mmHg and 15L

asked by Quentin on May 5, 2010
96. chem

A 5.2 litre baloon at 900 torr of pressure. If the temp is kept constant and the pressure is reduced to 200 torr what is the voume in the balloon? Is this a trick question? My instinct is to say the volume is the same, 5.2 litres.

asked by Roland on February 5, 2015
97. Chemistry

In an experiment, a mixture of two gases occupies a volume of 3.00 L at a temperature of 22.5 degree centigrade. The mixture contains 14.0 g of water, 11.5 g of oxygen, and 37.3 g of nitrogen. Calculate the total pressure and the partial pressure of each

asked by Aaqib Zaman on November 15, 2014
98. health

1.why is it necessary to make a pressure bandage for a bleeding injury a)to cover the wound so id does not get contaminated b)to create a barrier so the blood does not infect the rescuer c)to help stop the bleeding by applying continuous pressure****

asked by #HOMEWORK on April 6, 2015
99. meteorolgy

Compute the relative humidity (RH) to nearest percent for each of the following atmospheric conditions: (Round to one decimal place, do not include units.) b. vapor pressure = 4 mb, saturation vapor pressure = 16 mb, RH = _________%

asked by Anonymous on June 15, 2011