osmotic pressure chemistry

63,219 results, page 36

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 ...

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...

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?

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.

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 ...

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 ...

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?

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!

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!

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.

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

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

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?

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?

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?

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

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)?

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

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?

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)

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?

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.

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

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)

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)

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)

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.

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 ...

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!

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...

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)

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 ...

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.

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 ...

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 ...

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?

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 ...

Chem

A 1.00-mole sample of ammonia at 13.0 bar and 20°C in a cylinder fitted with a movable piston expands against a constant external pressure of 1.00 bar. At equilibrium, the pressure and volume of the gas are 1.00 bar and 22.0 L, respectively. a) calculate final temperture b) ...

PHYSICS

A cylinder contains 0.1 cubic meters of gas at atmospheric pressure. This gas is allowed to expand until its pressure drops to 7800 Pa. What is the gas volume after this expansion has taken place? answer: 7800/10130 = 0.770

Chemistry (PLEASE HELP ME)

1. According to the phase diagram for water, how is the state of water determined? a. proceed up a vertical line at any given temperature b. read the phase at the intersection of any given temperature and pressure c. at a given pressure, proceed horizontally to the S-L or L-G ...

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?

Physics

A horizontal segment of pipe tapers from a cross sectional area of 50.0 cm^ 2 to 0.500 cm^2. The pressure at the larger end of the pipe is 1.20x 10^5 Pa, and the speed is 0.040 m/s. what is the pressure at the narrow end of the segment?

Physics

Suppose a large dump truck tire has a surface area of 26.3 m^2. If a force of 1.58×10^7 Newtons acts on the inner tire, what is the absolute pressure inside the tire? What is the gauge pressure on the tire's surface?

Physics

Suppose a large dump truck tire has a surface area of 26.3 m^2. If a force of 1.58×10^7 Newtons acts on the inner tire, what is the absolute pressure inside the tire? What is the gauge pressure on the tire's surface?

chem

A 2.9 L sample of gas has a pressure of 5 atm and a temperature of 50 °C. What will be the new temperature in Kelvin if the volume is decreased to 2.4 L and the pressure decreased to 3 atm? Round to the nearest whole number. Don't forget the units.

algebra

The atmospheric pressure P in pounds per square inch (psi) is given by P = 14.7 e^−0.21 a where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 12.17 psi, what is its altitude?

math

The atmospheric pressure P in pounds per square inch (psi) is given by P = 14.7 e^−0.21 a where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 11.35 psi, what is its altitude?

chemistrey

an ocean depth of 10.0 m, a drivers lung capacity is 2.40 l. the air temperture is 32.0n c and the pressure is 101.30 kpa.what is the volume of the drivers lungs at the same depth, at a temp of 21.0c and a pressure of 141.20 kpa?

Physics

In a diesel engine, the piston compresses air at 305 K to a volume that is 0.0624 of the original volume and a pressure that is 48.5 times the original pressure. What is the temperature of the air after the compression?

physics

Q:What happens to the pressure of particles in the container when it is heated.explain. Q:A pressure of 2200Kpa is exerted by the particles in the container on the wall of area 25cm2. find the force exerted by the particle.

physics

At a point in a pipeline the velocity of liquid is 2 m/s and the pressure is 10^5 Pa. what is the pressure at a point 10 m lower than the first one (the cross-section is 1/4th of the previous one and the density of liquid is 800 kg/m^3)

boiling point

You are in a mountain range with atmospheric air pressure of 520 mmHg, and you wish to boil some eggs. What is the approximate boiling point of the water at this air pressure?

chem

at 84 degrees Celsius , a gas in a container exerts a pressure of 0.503 ATM. assuming the size of the container remains the same, at what Celsius temperature would the pressure be 1.20 atm ?

science

An aerosol can contains gases under a pressure of 4.6 atm at 18◦C. If the can is left on a hot sandy beach, the pressure of the gases increases to 4.69 atm. What is the Celsius temperature on the beach

Student

On a clear day at sea level, the partial pressure of N2 in air is 0.78 atm at 25 degres C. Under these conditions, the concentration of N2 in water is 5.3 x 10^-4 M. What is the partial pressure of N2 when the concentration in water is 3.5 x10^-4 M?

Chemistry

A mixture of 0.47 mole of H2 and 3.59 moles of HCl is heated to 2800C. Calculate the equilibrium partial pressures of H2 Cl2 and HCl if the total pressure is 2.00 atm. For the reaction Kp is 193 at 2800C. H2(g) +Cl2(g) = 2HCl (g) What I've done so far: found the partial ...

physics - sound level

For two sounds whose sound levels differ by 69 dB, find the ratios (greater value / smaller value) of the following values. (a) the intensities Intensity Final/Intensity Initial = log^-1 (69 / 10) = 7.9x10^6 (b) the pressure amplitudes (c) the particle displacement amplitudes ...

Physics

In a diesel engine, the piston compresses air at 302 K to a volume that is 0.0628 of the original volume and a pressure that is 48.2 times the original pressure. What is the temperature of the air after the compression? Can anyone help me work this problem?

Physics

In a diesel engine, the piston compresses air at 302 K to a volume that is 0.0628 of the original volume and a pressure that is 48.2 times the original pressure. What is the temperature of the air after the compression? I have no idea can anyone help?

chem

If the initial pressure of HD(g) is 2.270 atm, calculate the % decomposition of HD(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kp at 727.0 °C is 0.26. The initial pressure of the reaction products is 0 atm. 2HD(g) = H2(g)+D2(g)

physics

Before beginning a long trip on a hot day, a driver inflates an automobile tire to a gauge pressure of 2.20 atm at 300 K. At the end of the trip, the gauge pressure has increased to 2.70 atm.

Physics

Use the PV diagram of a system. The units for P and V are atmospheric pressure atm and liter L. Process A to B and B to C are straight lines on it. How much is the work done by the system from A to C in J? Given these coordinates:(volume on the x, pressure on the y) A: (1 Li, ...

College Physics

If a certain amount of ideal gas occupies a volume 9.5 m3 with a pressure of 3.1 atm and temperature 5.4 oC on earth, what would be its volume on another planet, where the temperature is 5.3oC and the pressure is 7.4 atm ? The answer is in unit of m3

physical science

The gas in a cylinder has a volume of 3 liters at a pressure of 106 kPa. The pressure of the gas is increased to 208 kPa. Assuming the temperature remains constant, what would the new volume be? = ....L?

Science---Hurry Please Help!

What do the lines making a circle around the high-pressure area indicate? A) Areas of equal pressure B) Areas of equal altitude C) An occluded front D) A stationary front

Science

The vapour pressure of solution having 2 grams of solute X (molar mass-32) in 100 grans of CS2 (vapour pressure-854 torr) is 848.9 torr. The molecular formula of the solute is ?

ap chemistry

ap chemistry - an, Tuesday, January 6, 2015 at 12:59am HELP ME WITH THIS ONE WHEN DONE WITH THE OTHER THX calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? k ...

physical science

If the absolute pressure of a gas is 550.280 kPa, its gage pressure is A. 101.325 KPa B. 277.280 KPa C. 448.955 KPa

physic

a tank contains 26.0 kg of oxygen gas at a gauge pressure of 8.70 atm. if oxygen is replaced by helium, how many kilograms of the latter will be needed to produce a gauge pressure at 7.00 atm?

chem help!

An expandable balloon contains 1400L of He at .950atm pressure and 18 degrees Celcius. At an altitude of 22 miles (temperature of 2.0 degrees Celcius and pressure of 4.0 torr), what will be the volume of the balloon?

Chem

In an experiment, 25.0 ml of a gas with a pressure of 1. atm is contained in a balloon at 25.0 c. The Balloon is then cooled to 5.0 c, and the pressure is found to be .750 atm. What is the volume of the gas under the new conditions?

CHM

A sample of gas has an initial volume of 2.4 L at a pressure of 855 mm Hg and a temperature of 298K. If the gas is heated to a temperature of 387 K and expanded to a volume of 4.1 L, what is its final pressure in mm of mercury?

Physics

The pressure exerted by a phonograph needle on a record is surprisingly large. If the equivalent of 1.00 g is supported by a needle, the tip of which is a circle 0.200 mm in radius, what pressure is exerted on the record in N/m2?

chem

All the oxygen gas from a 22.0-L container at a pressure of 72.2 kPa is added to a 18.0-L container of hydrogen at a pressure of 150. kPa. After the transfer, what is the partial pressures of hydrogen?

Chem

a gas has a volumn of 36.0 L and a pressure of 750 torr when the temperature is 10 degrees celsius. what is the pressure if the volume changes to 78 degrees celsius if the amount of gas stays the same?

Physics QUIZ

Rising air cools as a result of a decrease in barometric pressure with altitude. (Lapse Rate) True/False? When an inflatable life jacket is inflated with a compressed air cylinder the air inside the now inflated life jacket is much colder than it was prior to inflation when it...

Chemistry

"Under constant conditions of P(pressure) and T(temperature) (and R [gas constant]), write an equation showing d(density) written as a function of M(molecular mass)." I don't understand this, really! Please help! Thanks in advance!

chemistry

2NO + O2 -> 2NO2 200. mL of NO at STP is reacted with 500. mL O2of at STP. Calculate the partial pressure of NO2 after the reaction goes to completion. Assume a constant volume.

General Chemistry 2

The molar heat of vaporization of benzene is 31kj/mol. Calculate the entropy change for the liquid vapor equilibrium. At 1 atm pressure, benzene boils at 80.1 degrees Celsius.

Chemistry

Assume tat you have a sample of a gas in a cylinder with a movable piston at constant pressure. Determine the volume of the gas if the absolute temperature is decreased by twenty-five percent.

Chemistry

What is the pressure in millimeters of mercury of 0.0155 mole of He gas with a volume of 206 mL at a temperature of 30 degrees C? I used the ideal gas law and ended up with 1.87 mmHg but it said that was wrong. Please help.

Chemistry

consider the following reaction: 2CH3OH(g) yields 2CH4(g) + O2(g) change in enthalpy= 252.8kJ Calculate the amount of heat transferred when 26.0 g of {\rm CH_3OH} (g) is decomposed by this reaction at constant pressure.

chemistry

Calculate the partial pressure of propane in a mixture that contains equal numbers of of moles of propane (C3H8) and butane (C4H10) at 20 degrees C and 844 mmHg. (R=0.082 L-atm/K mol)

chemistry

At constant pressure and 25 degrees C, what is delta H for the reaction 2C2H6(g) + 7O2(g) --yields-- 4CO2(g) + H2O(l) if the complete consumption of 11.3 g of C2H6 releases -586.3 kJ of heat energy? (11.3=.38 mol C2H6)

Chemistry

at a pressure of 390.0 kPa, a sample of ideal gas containing 110. moles of propane is collected at a tempature of 55 degrees celcius. find the volume of the propane tank used

Chemistry

at a pressure of 390.0 kPa, a sample of ideal gas containing 110. moles of propane is collected at a tempature of 55 degrees celcius. find the volume of the propane tank used

Chemistry

Given the following unbalanced equation C4H10 (g) + O2 (g) → CO2 (g) + H2O (l) What mass of water forms if 6.5 L of C4 H10 (g) measured at STP is allowed to react with 32.0 L of O2 (g)measured at 27°C and 1.68 atm pressure?

Intro Chemistry

Given: 2CO(g) + O2(g) -> 2C02(g). When 10 mol of CO and 8.0 mol of O2 react in a closed 10L vessel. a)how many moles of CO, O2, and CO2 are present at the end of the reaction? b)What will be the total pressure in the flask at 0 degrees C?

Chemistry

Assuming that seawater has a total ion concentration (aka colligative molarity) of 1.10 M conc, calculate how many liters of seawater are needed to produce 68.7 L of fresh water at 20 C with an applied pressure of 51.0 bar.

chemistry

A sample of gas is compressed from 13.57 L to 3.93 L using a constant external pressure of 2.91 atm. At the same time, 1,759 J of heat flows into the surroundings. What is the internal energy change for the gas?

Chemistry

How many moles of ammonia gas can be formed from the complete reaction of 44.8 liters of nitrogen gas at standard temperature and pressure (STP), according to the balanced equation, N2 (g) + 3H2 (g) arrow 2NH3 (g)?

Chemistry

A sample of nitrogen occupies a volume of 300ml under a pressure of 380 torr at -177C. What would be the volume at STP? I know the answer is 430mL but I don't know which equations to use to formulate the calculation.

chemistry

A flask that can withstand an internal pressure of 2511 torr, but no more, is filled with a gas at 21.0°C and 758 torr and heated. At what temperature will it burst? i used P1/x=P2/T2 and got 69.6 degrees Celsius. what is wrong

Chemistry

For the complete combustion of 1.000 mole of ethane gas at 298K and 1 atm pressure, change in H= -1560 kJ/mol. What will be the heat released when 4.42g of ethane is combusted under these conditions?

Chemistry

One mole of N2 and 3 moles of H2 are placed in a flask at 375 degree celsius.? Calculate the total pressure of the system at equilibrium if the mole fraction of NH3 is found to be 0.21. The Kp for the reaction is 4.21 x 10 raise to -4

Chemistry

A certain substance has a heat of vaporization of 62.08 kJ/mol. At what Kelvin temperature will the vapor pressure be 4.50 times higher than it was at 361 K? I've gotten it to the point of: ln(4.50)=7466.47423176378616 K (1/361 - 1/T2) Solving for T2 but I don't know where to ...

Dr Bob222

Can you help me with this please - Temp - 650 Pressure - 690mm Hg mass - 0.927g volume - 194cm3 How do I calculate the volume of the gas at a different temp? & at a different pressure? You can do this two ways. The simplest is P1V2/T1 = P2V2/T2

physics

Water flows at 0.865 m/s from a hot water heater, through a 450kPa pressure regulator. The pressure in the pipe supplying an upstairs bathtub 3.70 m above the heater is 414kPa . What's the flow speed in this pipe?

pre ap chem

determine the partial pressure of hydrogen if it's collected over water at 23 degrees celsius and the system has a total pressure of 724 mmHg then determine the mole fraction of water vapor in the system

Physics

The pressure at a depth of 300 m in the ocean exceeds sea-level atmospheric pressure by 3.03 kPa. By how much does the volume of a 0.2-m3 aluminum object contract when lowered to this depth in the ocean? The bulk modulus of aluminum is 7 x 10^10 Pa.

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