# osmotic pressure chemistry

63,632 results, page 16

### Chemistry

I havent been at school for 8 days due to somthing wrong with my heart, but the teachers gave me work. I have no clue how to do them. I really need help please, There all due tomarrow. The air in a dry, sealed 2L soda bottle has a pressure of 0.998 atm at sea level at a ...

### chemistry

how to find the pressure exerted by the hydrogen alone? and the volume of dry hydrogen at SATP? i have room temperature=23C room pressure =101.62kPa volume of h2 gas & H2O vapour collected =43.2ml temperature of water = 23C length of Mg ribbon = 3.00cm

### Chemistry II

Under water where the temperature is 17C and the pressure is 394 kPa, a diver inhales 2.1 L of air from his SCUBA tank. a.How many moles of gas are in his lungs? b.If the diver swims to the surface without exhaling where the temperature is 32C and the pressure changes to 100.2...

### Chemistry

A piece of Na metal undergoes a complete reaction with H2O (l0 to produce sodium hydroxide and hydrogen. If 24.0 g of Na in a 3.50 L container is reacted with an excess amount of water at 25 degrees Celsius, calculate the total pressure (in atm) in the 3.50 L container when ...

### chemistry

A sample of neon gas used in a neon sign occupies a volume of 3.90 L at a pressure of 580 torr. Calculate the volume of the gas if the pressure in the glass tube of the sign is 783 torr.

### Chemistry Help!!!!!!!!!!!!!!

1)The equipment you would use for carrying out a simple distillation at reduced pressure (i.e. under vacuum) 2)What could be the advantage of carrying out a distillation under vacuum as compared to atmospheric pressure?

### fluid mechanics

a gas well containd hydrocarbon gases with an average molecular weight of 24, which can be assumed to be an ideal gas with a specific heat ratio 1.3. The pressure and temperature at the top of the well are 250psig and 708F, respectively. The gas is being produced at a slow ...

### Chemistry. PLEASE HELP

If we believed that the molecules of a gas move around fairly rapidly, we can use this to explain all of the following EXCEPT why adding more gas increases the pressure. why most of the volume of the gas sample is taken up by the gas molecules. why the gas molecules do not ...

### chemistry

By how much will the vapor pressure of water decrease if a solution at 40.0°C is produced by dissolving 16.0212 g of K3PO4 (formula mass = 212.30 g/mol) with 40.8480 g of water. The vapor pressure of pure water at this temperature is 55.30 mmHg. If the solute is ionic, assume...

### science

home / homework help / questions and answers / science / physics / the temperature of an ideal gas at an initial pressure ... Question The temperature of an ideal gas at an initial pressure P1 and volume V1 is increased at constant volume until the pressure is doubled. The ...

### Physics

Suppose that there is a partial blockage of the aorta, which normally pumps about 5 L of blood per minute. If the diameter of the aorta were reduced by 30%, what increase in blood pressure gradient would be needed to obtain the normal flow rate? (Assume that Poiseuille’s law...

### chemistry

When I measure pressure in relation to depth, I found that as the depth increases, so does the pressure. I experimented this in a LARGE graduated cylinder. What would be the difference if I used a SMALL graduated cylinder versus a large one? What is the evidence for this? And ...

### chemistry

When I measure pressure in relation to depth, I found that as the depth increases, so does the pressure. I experimented this in a LARGE graduated cylinder. What would be the difference if I used a SMALL graduated cylinder versus a large one? What is the evidence for this? And ...

### chemistry

A sample of an ideal gas at 1.00 atm and a volume of 1.61 L was placed in a weighted balloon and dropped into the ocean. As the sample descended, the water pressure compressed the balloon and reduced its volume. When the pressure had increased to 45.0 atm, what was the volume ...

### physic

an ideal fluid flows through a pipe hat runs up an incline and gradually rises to a height H. The cross sectional area of the pipe is uniform. compared with the flow at the bottom of the incline, the flow at the top is a) moving slower at lower pressure b) moving slower at ...

### Chemistry

I need help on these last three problems on my Hw. 1. A 10.0 L sample of gas at 3.00 degrees Celsius is cooled at a constant pressure until it reaches 1/2 of its original volume. At what temperature in K will this volume be reached? (Charles law) 2. 994 mLof gas is collected ...

### Chemistry

I am not quite sure how to do this problem, it doesn't seem to fit into any of my given equations: A gas has a volume of 35.5L and a pressure of 765mmHg at standard temperature. If the same sample is placed in a 56.0L container and the pressure is measured at 0.92atm, ...

### Chemistry

A piece of solid magnesium is reacted with hydrochloric acid to form hydrogen gas: Mg (s) + 2HCl (aq) ---> MgCl2 (aq) + H2 (g) What volume of hydrogen gas (in mL) is collected over water at 25 degrees Celsius by reaction of 0.450 g of Mg (AW= 24.3 g/mol) with 50.0 mL of 1.0...

### College Chemistry

Oxygen has a Henry’s law constant of 1.3*10^-3 mol/kg*bar at 25 °C when dissolving in water. If the total pressure of gas ( gas plus water vapor) over water is 1.00 bar, what is the concentration of O2 in the water in grams per milliliter? (The vapor pressure of water at 25...

### chemistry

If the concentration of CO2 is 2.90 g of CO2 per 1.00 L of soft drink when bottled under 2.0 atm of CO2 pressure, what will be the concentration of the CO2 in the drink after it has been opened and left to come to equilibrium with the atmosphere which has a CO2 partial ...

### chemistry

If the concentration of CO2 is 2.90 g of CO2 per 1.00 L of soft drink when bottled under 2.0 atm of CO2 pressure, what will be the concentration of the CO2 in the drink after it has been opened and left to come to equilibrium with the atmosphere which has a CO2 partial ...

### chemistry

What is partial pressure?

### chemistry

a pressure vessel

### Chemistry

A gas has a volume of 1,400 milliliters at a temperature of 20.0 K and a pressure of 101.3 kPa. What will be the volume when the temperature is changed to 40.0 K and the pressure is changed to 50.65 kPa?

### chemistry

If 21.0 L of gas is held at a pressure of 7.80 atm and a temperature of 900.0 K, what will be the volume of the gas if the pressure is decreased to 4.50 atm and temperature decreased to 750.0 K?

### Chemistry

I'm not sure how to find a linear equation for this problem. One common flow measurement device is the orifice meter, which consists of a disk with a machined hole. It is placed as an obstruction to flow in a pipe, causing pressure drop to occur as the fluid in the pipe goes ...

### chemistry

A very flexible helium-filled balloon is released from the ground into the air at 20 degree C. The initial volume of the balloon is 5.00 L, and the pressure is 760 mmHg. The balloon ascends to an altitude of 20km, where the pressure is 76.0 mmHg and the temperature is -50 ...

### physics

A utube manometer contains mercury of density 13,600 kg/m3. One end of the manometer is open to the atmosphere and the other end is connected to a low pressure natural gas line. A height difference of 11.8 cm results between the levels of the two liquid columns, with the side ...

### biology

What must the systolic blood pressure be valued at for adequate mean arterial pressure if the diastolic pressure is 75? (Assume resting conditions) A. at least 90 B. at least 95 C. at least 100 D. at least 105 E. at least 110 F. at least 115 G. at least 120

### Chemistry

1. What happens to the pressure and boiling point when there is an increase in altitude? 2. What happens to the altitude and pressure when the boiling point is lowered? 3. What happens to the altitude and boiling point when the pressure is increased?

### Chemistry

The vapor pressure of diethyl ether is 463.57 mm Hg at 25 degrees celsius. How many grams of aspirin C9H8O4, a non volatile nonelectrolyte (mw=180.1g/mol), must be added to 216.7g of ether to reduce the vapor pressure to 453.74 mm Hg. Ether=74.12g/mol This question is similar ...

### Chemistry

Could you show me where to start on solving this equation? The reaction in question will be carried out in a calorimeter. The volume of the chamber inside is 2.00 L. Experiment starts by evacuating the chamber to 0.00 kPa. Then oxygen gas is filled into the chamber till ...

### Chemistry

Could you show me where to start on solving this equation? The reaction in question will be carried out in a calorimeter. The volume of the chamber inside is 2.00 L. Experiment starts by evacuating the chamber to 0.00 kPa. Then oxygen gas is filled into the chamber till ...

### Chemistry

Could you show me where to start on solving this equation? The reaction in question will be carried out in a calorimeter. The volume of the chamber inside is 2.00 L. Experiment starts by evacuating the chamber to 0.00 kPa. Then oxygen gas is filled into the chamber till ...

### Chemistry

A mixture of three gases has a total pressure of 1380 mm Hg at 25 degrees celsius. If the mixture contained 56 grams CO2, 3.04 mol CO and 9.03 X 10^23 atoms of Argon, the partial pressure of argon would be about? First I did 9.03e23 * 760/1 = 2.26e22 and then I was going to do...

### Math

Atmospheric pressure changes as you rise above earth's surface. At an altitude of h kilometers, where 0<h<80, the pressure P is newtons per square centimeter is approximately modeled by the function P(h)=10.31e^(-0.116h). What is the approximate pressure at 50 kilometers...

### Physics

By how much does the H20 pressure exceed atmospheric pressure at 3 meters below the surface of a pool with fresh H20. I don't know what equation to use. You have to figure the weight of a column of water of some height h, and horizontal area A. Weight= mg= density*volume*g =...

### Chemistry

Each increase in pressure of 100 atm decreases the melting point of ice by about 1.0¡ÆC. Q. One possible explanation of why a skate moves smoothly over ice is that the pressure exerted by the skater on the ice lowers its freezing point and causes it to melt. The pressure ...

### Chemistry

If argon has a volume of 5.0 dm3 and the pressure is .92 atm and the final temperature is 30 degrees celcius and the final volume is 5.7 L and the final pressure is 800 mm Hg, what was the initial temperature of the argon?

### chemistry

Question: Consider this molecular-level representation of a gas. There are: 5 orange gas particles 6 blue gas particles 3 green molecules of gas (two particles attached together) If the partial pressure of the diatomic gas is 0.510 atm, what is the total pressure? I have tried...

### chemistry

What is the vapor pressure of a solution of 0.5mol of a non-volatile impurity x and 2.0 g of TaCl5 (L) at a temperature of 226 degrees celcius? The vapor pressure of TaCl5 (l) at 226 degrees celcius ,621mmHg

### chemistry

a container with an initial volume of 6 liters at a temperature of 30 degrees celsius with a pressure of 2atm is changed so the temperature is now 90 degrees celsius and the volume is 8 liters. calculate the new pressure

### PHYsics URGENT

the deepest part of the ocean is 10,900 meters deep. a) calculate the absolute pressure at that depth in units N/m^2. Use the mass density of sea water, 1030 kg/m^3. see part b for more info b) one atmosphere of pressure is about 1.013 X 10^5 N.m^2. How many atmospheres is the...

### Chemistry-Please help

If 1.00mol of argon is placed in a 0.500- container at 28.0 degree Celsius, what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation)? For argon,a=1.345(L square. atm)/mol square and...

### Chemistry

A 19.9mL volume of a hydrochloric acid solution reacts completely with a solid sample of magnesium carbonate, producing 183mL of CO2 that is collected over water at 24.0 degrees C and 738 torr total pressure. The vapor pressure for water at 24.0 degrees C is 22.39 mmHg. What ...

### (12)Chemistry - Science (Dr. Bob222)

Calculate delta E for a process in which 88.0 g of nitrous oxide gas (N2O) is cooled from 165 ˚C to 65 ˚C at a constant pressure of 5.00 atm. The molecular weight of nitrous oxide is 44.02 g/mol, and its heat capacity at constant pressure, Cp, is 38.70 J/molK. A) - ...

### Chemistry

Diethyl ether is a volatile organic compound. the vapor pressure of diethyl ether is 401 mm Hg at 18 degrees celsius and the change in H vapor = 26.0 kJ/mol. Calculate the vappor pressure of diethyl ether at 25 degrees C.

### Chemistry

When a sample is above critical temperature and above critical pressure, it is a supercritical fluid. What happens when a sample is above critical temperature but below critical pressure? What phase is that? What happens when a sample is above critical pressure but below ...

### Chemistry

I NEED HELP ASAP Here's the problem I'm struggling with: When 1.00 mole of ethlyene (C2H4) is burned at constant pressure, 1410 kJ of energy is released as heat. Calculate delta H for a process in which 10.0 g of ethlyene is burned at constant pressure. Please show me the ...

### Chemistry-DrBob222

A piece of solid magnesium is reacted with hydrochloric acid to form hydrogen gas: Mg (s) + 2HCl (aq) ---> MgCl2 (aq) + H2 (g) What volume of hydrogen gas (in mL) is collected over water at 25 degrees Celsius by reaction of 0.450 g of Mg (AW= 24.3 g/mol) with 50.0 mL of 1.0...

### College Algebra

The atmospheric pressure P in pounds per square inch, at x miles above sea level is given by P=14.7e^-0.21x. At what height will the atmospheric pressure be one third of the sea-level pressure? Thank you!!

### chem

The total pressure in a flask containing air and ethanol at 257C is 800 mm Hg. If the pressure of the air in the flask is 762 mm Hg, the vapor pressure of ethanol is? I tried doing a relationship of P1 over t1 etc but i don't get the right answer.

### Bio 207

If barometric pressure is 480mmhg, what is the partial pressure of 02 in inspired air? At this pressure, what % of 02 would you have to gave in the air you are breathing so that the inspired p02 would be normal? ( 160 mmhg)

### Science

A sample of gas under a pressure of 622 kPa has a volume of 233 mL. The pressure is increased to 988 kPa, while the temperature remains constant. What volume will the gas occupy at this pressure?

### Chem

A scuba diver creates a spherical bubble with a radius of 4.0 at a depth of 30.0 where the total pressure (including atmospheric pressure) is 4.00 . What is the radius of the bubble when it reaches the surface of the water? (Assume atmospheric pressure to be 1.00 and the ...

### physics

Consider the window (of area 0.68 m2) of an airplane. If the pressure inside the plane is atmospheric pressure, while the pressure outside is 31 % of Patm, find the force on the window. Ignore the velocity of the airplane (i.e., ignore Bernoulli’s effect).

### science

A system contains 0.15 m3 of a gas at a pressure of 3.8 bar and 150 C. It is expanded adiabatically till the pressure falls to 1 bar. The gas is then heated at a constant pressure till its change in enthalpy is 70 kJ. Determine the total work done.

### science

A system contains 0.15 m3 of a gas at a pressure of 3.8 bar and 150 C. It is expanded adiabatically till the pressure falls to 1 bar. The gas is then heated at a constant pressure till its change in enthalpy is 70 kJ. Determine the total work done.

### chem

When the valve between the 2.00-L bulb, in which the gas pressure is 2.00 atm, and the 3.00-L bulb, in which the gas pressure is 4.50 atm, is opened, what will be the final pressure in the two bulbs? Assume the temperature remains constan

### Physiology

If barometric pressure is 480mmhg, what is the partial pressure of 02 in inspired air? At this pressure, what % of 02 would you have to gave in the air you are breathing so that the inspired p02 would be normal? ( 160 mmhg)

### Chemistry

A cylinder of argon gas contains 125 mol at a pressure of 150 atm and a temperature of 27°C. After some of the argon has been used, the pressure is 136 atm at 27°C. What mass of argon remains in the cylinder? A) 4.23 × 103 g B) 113 g C) 5.52 × 103 g D) 4.52 × 103 g E) 5....

### chemistry

an ideal gas in a closed inflexible container has a pressure of 6 atm and a temperature of 27 degree celsius . What will be the new pressure of the gas of temperature is decreased to -73 degree celsius? a) 2 atm b) 3 atm c) 4atm d) 8atm e) 9atm plz teach me the method also

### chemistry

an ideal gas in a closed inflexible container has a pressure of 6 atm and a temperature of 27 degree celsius . What will be the new pressure of the gas of temperature is decreased to -73 degree celsius? a) 2 atm b) 3 atm c) 4atm d) 8atm e) 9atm plz teach me the method also

### chemistry

Azomethane, CH3NNCH3, is not a stable compound, and once generated, it decomposes. The rate of decomposition was measured by monitoring the partial pressure of azomethane, in torr. Time (min) 0, 15, 30, 48, 75 Pressure(torr)36.2, 30, 24.9,19.3, 13.1 Determine the instantaneous...

### Chemistry

a bicycle is filled with air to a pressure of 6.80atm and a temperature of 19 degrees celsus. Riding the ike on asphalt on a hot day increases the temperature of the tire to 58 degrees celcius. The volume of the tire increases by 4.0%. What is the new pressure in the bicycle ...

### Chemistry II

When a specific amount of propanol (C3H8O) is added to 110.0 g of pure water at 60°C, the vapor pressure of water over the solution is lowered by 1.596 kPa. Given the vapor pressure of water at 60°C is 19.932 kPa, what is the mass of propanol added?

### Chemistry

Gasoline is a mixture of hydrocarbons, a major component of which is octane,CH3CH2CH2CH2CH2CH2CH2CH3. Octane has a vapor pressure of 13.95 torr at 25 degrees celcius and a vapor pressure of 144.78 torr at 75 degrees celcius. Use these data and the equation in part (a) to ...

### PHYSICS HELP

Two identical gas cylinders each contain 20.0 kg of compresses air at 1.00 x 106 pa and 275 K. One of the cylinders if fitted with a safety valve that releases air into the atmosphere if and only if the pressure in the cylinders raises above 1.10 x106 pa (the other cylinder ...

### Thermodynamic

A system contains 0.15 m3 of a gas at a pressure of 3.8 bar and 150 C. It is expanded adiabatically till the pressure falls to 1 bar. The gas is then heated at a constant pressure till its change in enthalpy is 70 kJ. Determine the total work done. Pl hlep me

### chemistry

25.75 mL of a hydrochloric acid solution reacts completely with a solid sample of magnesium carbonate producing 170.8 mL of CO2 which is collected over water at 24.00°C and 731.0 torr total pressure. The vapor pressure of water at 24.00°C is 22.4 torr. 2 HCl(aq) + MgCO3(s...

### chemistry

The following equilibrium exists in a closed container: N2(g) + O2(g) = 2NO(g), ΔH = +181 kJ/mol. Which of the following perturbations would favor the formation of NO(g)? (practice MCAT question from The Princeton Review MCAT Science Workbook, 2009 edition) increasing the...

### chemistry

the vapor pressure of carbon sulfide is 355.6 torr at 25 degrees Celsius. what is the vapor pressure of a solution prepared by dissolving 12.52 g naphthalene (C10H8, 128.2 g/mol) in 125.0 mL CS2 liquid (76.14 g/mol, 1.261 g/mL)? Assume the solution obeys Raoult's law, and ...

### Chemistry

A scuba diver 60ft below the ocean’s surface inhales 50.0 mL of compressed air from a scuba tank with an initial pressure of 3.00 atm and temp of 8 degrees Celsius. What is final pressure, in atmospheres, in the lungs when the gas expands to 150.0 mL at a body temp of 37 ...

### Physics

A swimmer has 8.20 x 10^-4 m^3 of air in his lungs when he dives into a lake. Assuming the pressure of the air is 95 percent of the external pressure at all times, what is the volume of the air at a depth of 10.0 m? Assume that the atmospheric pressure at the surface is 1.013 ...

### chm

What is the vapor pressure (in mmHg) of a solution containing 16.0 g of (3 marks) glucose (C6H12O6) in 80.0 g of methanol (CH3OH)? The vapor pressure of pure methanol at 27 °C is 140 mm Hg. If the experimentally determined vapor pressure is 128 mm Hg, account for the ...

### chemistry

A solution contains naphthalene (C10H8) dissolved in hexane (C6H14) at a concentration of 11.39{\rm \\%} naphthalene by mass. Calculate the vapor pressure at 25 ∘C of hexane above the solution. The vapor pressure of pure hexane at 25 ∘C is 151 torr.

### chemistry

A solution contains naphthalene (C10H8) dissolved in hexane (C6H14) at a concentration of 11.07 % naphthalene by mass. Calculate the vapor pressure at 25 ∘C of hexane above the solution. The vapor pressure of pure hexane at 25 ∘C is 151 torr.

### Chemistry

A compressed gas in a cylinder contains 1000.0 g of argon gas. The pressure inside the cylinder is 2050 psi at 18 degrees Celcius. How much gas remains if the pressure is decreased to 650. psi at a temperature of 26 degrees Celcius?

### Chemistry

Initally, only H2S is present at a pressure of 0.224 bar in a closed container. What is the total pressure in the container at equilibrium? H2S(g)<--->H2(g)+S(g) Initally, only H2S is present at a pressure of 0.224 bar in a closed container. What is the total pressure in...

### chemistry

A fixed quantity of gas at 27°C exhibits a pressure of 729 torr and occupies a volume of 5.70 L. (a) Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.75 atm while the temperature is held constant. (b) Use Charles's law to calculate...

### chemistry

A fixed quantity of gas at 27°C exhibits a pressure of 729 torr and occupies a volume of 5.70 L. (a) Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.75 atm while the temperature is held constant. (b) Use Charles's law to calculate...

### chemistry

A fixed quantity of gas at 27°C exhibits a pressure of 729 torr and occupies a volume of 5.70 L. (a) Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.75 atm while the temperature is held constant. (b) Use Charles's law to calculate...

### general chemistry

Calculate the molar mass that would be obtained from the actul experimental data under the following conditions. The unknown is mehy propy ether (CH3OC3H7) which has the vapor pressure of 375.2 torr at room temperature, 20C. The volume of the flask is 135mL, the temperature of...

### Chem

A mixture of He Ne and 3rd gas exhibit a total pressure of 486 mm hg if the partial pressure of He125mm mm hg and partial pressure of Ne is 214mm hg what is the mole fraction of the 3rd gas in container

### Math

The pressure p at the bottom of swimming pool varies directly as the depth d of the water. If the pressure is 125 Pascal when the water is 2 meters deep, find the pressure when it is 4.5 meters deep.

### Chemistry

If 74.5% of exhaled air is nitrogen, what is the partial pressure of nitrogen in exhaled air. Assume that the total pressure of exhaled air is 760 mmhg.

### Chem II

What is the vapor pressure at 23 degrees C of a solution of 1.20 g of naphthalene, C10H8, in 25.6 g of benzene, C6H6? The vapor pressure of pure benzene at 23 degrees C is 86.0 mmHg; the vapor pressure of naphthalene can be neglected. Calcluate the vapor pressure lowering of ...

### CHEMISTRY

if a pure liquid in a sealed container is in equilibrium with its own vapor, the dependence of the vapor pressure on the temperature and the heat of vaporization is governed by the Clausius-Clapeyron equation. what is the heat of vaporization if the vapor pressure of liquid ...

### chemistry

The vapor pressure of liquid chloroform, CHCl3, is 100. mm Hg at 283 K. A 0.198 g sample of liquid CHCl3 is placed in a closed, evacuated 400. mL container at a temperature of 283 K. Assuming that the temperature remains constant, will all of the liquid evaporate? What will ...

### Chemistry

Inflating a balloon requires more pressure than the pressure of the atmosphere outside of the balloon, in order to compensate for the stretchiness of the balloon’s material. Would you need more or less gas to compensate? (Hint: Consider the ideal gas law equation. How does n...

### chemistry

A solution contains naphthalene(C10H8) dissolved in hexane (C6H14) at a concentration of 14.52 % naphthalene by mass.Calculate the vapor pressure at 25 degrees C of hexane above the solution. The vapor pressure of pure hexane at 25 degrees C is 151 .

### math

If a tank were blocked in (all inlets and outlets are closed) late in the evening with a temperature of 62F a pressure gauge attached to it would read an ambient pressure (14.7 PSIA). The next day, as the sun begins to shine directly on the tank, its inside temperature would ...

### 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.

### PLEASEE HELP CHEMISTRY

What is partial pressure?

### Chemistry

What is the vapor pressure of ethanol at 13 C?

### chemistry

what is the vapor pressure of ethonal at 75°c?

### chemistry

1 atmosphere of pressure is equivalent to

### Chemistry

How do you find the partial pressure?

### Chemistry

pressure of Ne in sealed container