# osmotic pressure chemistry

63,219 results, page 42

### Physics

An elevator operates on a very slow hydraulic jack. Oil is pumped into a cylinder that contains the piston. The piston lifts the elevator as the internal cylinder pressure (P2) rises in comparison to the outside pressure (P1=101,325 Pa or about 14.7 psi). If the piston can ...

### MATH Prob.

The mean systolic blood pressure of adult males is normally distributed with a mean of 138 (millimeters of mercury) and a standard deviation of 9.7. What percent of adult males have blood pressure between 161.28 and 164.9?

### Math/ Probability

The mean systolic blood pressure of adult males is normally distributed with a mean of 138 (millimeters of mercury) and a standard deviation of 9.7. What percent of adult males have blood pressure between 161.28 and 164.9?

### physics

Two hundred liters of gas at zero degrees Celsius are kept under a pressure of 150 kPa. The temperature of the gas is raised to 273 degrees Celsius and the pressure is increased to 600 kPa. What is the new volume?

### Algebra

In a hurricane, the wind pressure varies directly as the square of the wind velocity. If wind pressure is a measure of a hurricane’s destructive capacity, what happens to this destructive power when the wind speed doubles? Do you have an equation to prove if this makes sense...

### Physics

Water flows horizontally in a tapered pipe at a rate of 500 m^3/h. The area at one section of the pipe is 6500 mm² and 4000 mm² at another section. Calculate the gauge pressure at the larger section if the pressure at the smaller section is atmospheric.

### Physics

A certain amount of gas has a volume of 4000cm^3 at a temperature of 27 degree celsius and a pressure of 1.2 atmospheres. If the pressure is kept constant, find the volume of the gas if it is heated to 60 degree celsius. Please tell me what formula should I use.

### Physics

A gas is kept at a pressure of 4.00 × 105 Pa and a temperature of 30.0 °C. When the pressure is reduced to 3.00 × 105 Pa and the temperature raised to 40.0 °C, the volume is measured to be 0.45 × 10^−4 m^3. Estimate the original volume of the gas. I tried using initial...

### Physics

The four tires of an automobile are inflated to an absolute pressure of 2.0*10^5 Pa. Each tire has an area of 0.024m^2 in contact with the ground. Determine the weight of the automobile. Pressure*area= force. There are four tires.

### Physical Science

A tire contains air at a pressure of 2.8 bar at 10 degrees Celsius. If the tires volume is unchanged, what will the air pressure in it be when the tire warms up to 35 degrees Celsius as the car is driven?

### physics

The figure shows a nozzle on a hose carrying water. If the pressure at Point 1 is 290 x 10^3 Pa, the velocity 0.64 m/s, and the diameter 20 cm. Given that the diameter at point 2 is 1.4 cm, what is the velocity at point 2? v_2 = What is the pressure at point 2? P_2 =

### science

At a pressure 43 kPa, the gas in a cylinder has a volume of 11 liters. Assuming temperature remains the same, if the volume of the gas is decreased to 5 liters, what is the new pressure? kPa Im guessing it 58 or 77x10^3

### Chem

Knowing what information would allow you to order gas molecules according to their velocity? A. Pressure and temperature B. Volume and molecular mass C. Pressure and volume D. Temperature and molecular mass

### chem

Knowing what information would allow you to order gas molecules according to their velocity? A. Pressure and temperature B. Volume and molecular mass C. Pressure and volume D. Temperature and molecular mass

### chemistry

Calculate the molar mass of a gas if 0.805g of this gas has a pressure of 4.00 bars at 305K in a 1 L. What is the gas density at this T and P, and what is the density at STP

### Chemistry

A 2.5 L sample of gas at 25 degrees Celsius is heated to 50 degrees celcius at constant pressure. What would the volume be at 50 degrees celcius?

### Chemistry

nitrogen gas is at 2.00. c, 2.00 atm pressure and occupies a volume of 10.01. Assume nitrogen is an ideal gas, how many moles of the gas are present?

### Science

A pressure of 2 KPa is acting on a gas with a volume of 60 liters. If the pressure decreases to 1 kPa, what volume will the gas occupy?

### Algebra

At a pressure of 2.4 atm a balloon has a volume of 9.8 L. If the pressure is decreased to 0.96 atm (at constant temperature), what is the new volume of the balloon?

### AP Chem - to Dr. Bob

I don't understand how to even start this problem: A mixture of H2(g), O2(g), and 2 mL of H2O is present in a 0.5 L rigid container at 25 degrees Celsius. The number of moles of H2 and the number of moles of O2 are equal. The total pressure is 1146 mmHg. Vapor pressure of ...

### phyics

on a warm day(92 degrees F) an air filled balloon occupies a volume of .20m^3 and is under a pressure of 20.0 lbs/in^2. if the baloon is cooled to 32 degrees F in a refigerator while its pressure is reduced to 14.7 lb/in wat is the volume on the air in the container? (assume ...

### Physics

A circular hatch in the hull of a submarine has a radius of 40.0 cm. The submarine is 850.0 m under water. If atmospheric pressure above the ocean is 1.01 x 105 Pa and the air pressure inside the submarine is 1.31x 105 Pa, what net force is exerted on the hatch? (ρsw = ...

### Intro to Physics

(a) Calculate the absolute pressure at the bottom of a fresh-water lake at a depth of 25.6 m. Assume the density of the water is 1.00 103 kg/m3 and the air above is at a pressure of 101.3 kPa. (b) What force is exerted by the water on the window of an underwater vehicle at ...

### Physics

2 moles of ideal gas are in a cylinder container with cross-sectional area 1*10^-2 m^3. Cylinder is fitted with a light, movable piston that is open to atmosphere, where pressure is 10^-5 PA.A 50KG MASS PLACED ON PISTON KEEPS IT IN mechanical equilibrium when temperature is ...

### physics, buoyance

Water flows at a rate of 25L/min through a horizontal 8.0-cm-diameter pipe under a pressure of 5.7Pa . At one point, calcium deposits reduce the cross-sectional area of the pipe to 40cm2 . Part A What is the pressure at this point? (Consider the water to be an ideal fluid.)

### physics

A tank of compressed helium for inflating balloons is advertised as containing helium at a pressure of 2374 psi, which, when allowed to expand at atmospheric pressure, will occupy a volume of 194 ft3. Assuming no temperature change takes place during the expansion, what is the...

### math

p=14.63⋅0.8 Atmospheric pressure, measured in pounds per square inch p, s, i is the force exerted by Earth's atmosphere over a given area. The atmospheric pressure, p, exerted on an airplane flying at an altitude of a miles above sea level can be approximated by the model ...

### College Chemistry

Consider the evaporation of methanol at 25.0 C: CH3OH(l)--->CH3OH(g) Delta G= 4.3 kJ Find Delta G at 25.0 C under the following nonstandard conditions: Pressure of CH3OH= 108.0 mmHg.

### chemistry

Assume that the pressure is one atmosphere and determine the heat in joules required to produce 3.23 kg of water vapor at 100.0 °C, starting with (a)3.23 kg of water at 100.0 °C and (b)3.23 kg of liquid water at 0.0 °C

### chemistry

If a particular reaction absorbs 252 kJ of heat while doing 105 kJ of work at constant pressure. What are the ΔE and ΔH for values for the reaction? Is the reaction endothermic or exothermic?

### chem

If I initially have a gas at a pressure of 13.5 atm, a volume of 2300 mL, and a temperature of 200 K, and then I raise the pressure to 14 atm and increase the temperature to 300 K, what is the new volume of the gas? Report the answer in correct number of significant figures ...

### Chemistry II

If the volume of a cylinder is 1.01 L at STP (0 C and 760 Torr). If the piston is depressed 5.62 cm further into the cylinder, by how many times will the gas pressure increase? What formula would I use to solve this problem? I tried using P1V1 = P2V2, but I don't know how to ...

### Chemistry

The water from a hydrated magnesium salt is driven off by heat in a closed system. If the steam generated exerts a pressure of 24.8 atm in a 2.00L container at 120 degrees C, determine the number of moles of H2O driven from the compound.

### chemistry

A steel tank contains carbon dioxide at 34 celsius and is at 13.0 atm. Determine the internal gas pressure when the tank and its contents are heated to 100 clesius. Do i need to convert to kevins here. There are answers using both, so which is correct.

### 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. I balanced the equation 2N2+2O2 = 2N2O5 BUT I AM NOT GETTING THE CORRECT ANSWER, WHAT AM I DOING WRONG?

### 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. I balanced the equation 2N2+2O2 = 2N2O5 BUT I AM NOT GETTING THE CORRECT ANSWER, WHAT AM I DOING WRONG?

### Chemistry

How many milliliters of O2 are consumed in the complete combustion of a sample of hexane, C6H14, if the reaction produces 325 mL of CO2? Assume all gas volumes are measured at the same temperature and pressure. The reaction is 2C6H14(g) + 19O2(g) -> 12CO2(g) + 14H2O(g)

### Chemistry

Of the following (a through e), which increase and which decrease, as the strength of the attractive noncovalent interactions increases? Explain. a) Deviations from the ideal ga law b) Boiling Temperature c) Sublimation temperature d) Vapor Pressure e) The energy it takes to ...

### Chm

Air is about 78.0% nitrogen molecules and 21.0% oxygen molecules. Several other gases make up the remaining 1% of air molecules.What is the partial pressure of nitrogen in air at atmospheric pressure (1 atm)? Assume ideal behavior.

### physics

A suitcase (mass m = 15 kg) is resting on the floor of an elevator. The part of the suitcase in contact with the floor measures 0.50 m × 0.15 m. The elevator is moving upward with an acceleration of magnitude 1.00 m/s2. What pressure (in excess of atmospheric pressure) is ...

### Physics

Suppose you measure a standing person's blood pressure by placing the cuff on his leg 0.470 m below the heart. Calculate the pressures you would observe if the pressures at the heart are 119 over 80 mm Hg. Assume there is no loss of pressure due to resistance in the ...

### College Chem NEED HELP

Calculate the moles of N(2) in a 3.50 litercontainer at 1.15 atm pressure and 28 degrees C. What is the Density of the gas? What is the new pressure if the temperature is raised to 75 degrees C? What is the new density of the gas?

### Physics

A tire contains air at a pressure of 2 bar at 15 degrees Celsius. If the tires volume is unchanged, what will the air pressure in it be when the tire warms up to 40 degrees Celsius as the car is driven?

### physics

Gas is conﬁned in a tank at a pressure of 10 atm and a temperature of 14◦C. If 58 percent of the gas is withdrawn and the temperature is raised to 50◦C, what is the new pressure in the tank?

### physics

A volume of 140 cm3 of an ideal gas has an initial temperature of 20°C and an initial pressure of 1 atm. What is the final pressure if the volume is reduced to 120 cm3 and the temperature is raised to 40°C?

### chem

The following equilibrium pressures were observed at a certain temperature for the reaction. N2(g) + 3 H2(g) <==> 2 NH3(g) partial pressure of NH3 = 3.2 ✕ 10−1 atm partial pressure of N2 = 1.6 ✕ 10−2 atm partial pressure ...

### chemistry

I need help on these questions. They all seem pretty similar i think? i don't know what formula i am suppose to use. And what does nonvolatile mean? is that like a clue or something? 1) 2.6 g of the nonvolatile solute sucrose (C12H22O11) is added to 465 g of water at 25oC. ...

### CHEMISTRY

Calculate ΔSfus and ΔSvap for HF. Determine the entropy change when 7.60 mol of HF(l) freezes at atmospheric pressure. I already calculated ΔSfus as 24.103 J/k*mol and ΔSvap as 86.07 J/K*mol....These are correct (I checked them already). I need help with ...

### physics

A sealed cylinder contains a sample of ideal gas at a pressure of 2.0 atm. The rms speed of the molecules is vO. (a) If the rms speed is then reduced to 0.90 vO, what is the pressure of the gas? (b) By what percentage does the speed of sound in the gas change?

### Chemistry

A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6.97 x ...

### chemistry

(a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6....

### Chemistry

(a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6....

### CHEMISTRY

(a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6....

### Chemistry

Fill a balloon with helium gas to a volume of 2.68 L at 23 celsius and 789mmHg. What would the volume of helium if the pressure changes to 632 mmHg but the temperature is unchanged. This is how I solved it V2 = V1 X P1/P2 2.68L X 23/789 = V2 =.078 L Is this correct

### Chemistry I

A scuba diver's tank contains 0.23 kg of O2 compressed into a volume of 3.5 L. (a) Calculate the gas pressure inside the tank at 11°C. ________atm (b) What volume would this oxygen occupy at 20°C and 0.92 atm? ________L what are the formulas for this problem?

### Chemistry

A quantity of N2 occupies a volume of 1 L at 290 K and 1.5 atm. The gas expands to a volume of 2.7 L as the result of a change in both temperature and pressure. Find the density of the gas at these new conditions (in grams per liter).

### chemistry

Rates of chemical reactions usually depend on temperature and pressure. However, half-life of all radioactive elements is independent of both T and p. How can these decay rates be independent of T if we beleive in the Arrhenius equation?

### chemistry

The following reaction is carried out as a source of hydrogen gas in the laboratory: Zn(s) + 2HCl(aq) ---> ZnCl2(aq) + H2(g) If 305 mL of hydrogen gas is collected over water at 25 °C at a total pressure of 746 mm Hg , how many grams of Zn reacted?

### chemistry

The following reaction is carried out as a source of hydrogen gas in the laboratory: Zn(s) + 2HCl(aq) ---> ZnCl2(aq) + H2(g) If 305 mL of hydrogen gas is collected over water at 25 °C at a total pressure of 746 mm Hg , how many grams of Zn reacted?

### chemistry

CO (g) + Cl2 (g) ↔ COCl2 (g In one experiment, 0.93 bar of CO was combined with 1.01 bars of Cl¬2 in a reaction vessel at 700K. After the system reached equilibrium, the total pressure was 1.24 bars. Calculate Kp0 for the system.

### chemistry

CO (g) + Cl2 (g) ↔ COCl2 (g In one experiment, 0.93 bar of CO was combined with 1.01 bars of Cl¬2 in a reaction vessel at 700K. After the system reached equilibrium, the total pressure was 1.24 bars. Calculate Kp0 for the system.

### Chemistry

How many grams of glycerin C3H8O3 must be dissolved in 375.9g of water at 100 degrees Celsius to reduce the pressure of water above the solution to 714.6mmHg. The solution is a non-volatile compound

### CHEMISTRY

I know this question is already on here but the answer wasn't helpful to me. Liquid Sodium can be used as a heat transfer fluid. Its vapor pressure is 40.0 torr at 633 C and 400.0 torr at 823 C. Calculate its heat of vaporization.

### Chemistry

The reaction, 2 SO3(g) == 2 SO2(g) + O2(g) is endothermic. Predict what will happen if the temperature is increased. A. the pressure decreases B. more SO3(g) is produced C. Kc increases D. Kc decreases E. none of the above I chose that Kc will increase. Would you agree?

### chemistry

If 0.45 mol of neon gas occupies a volume of 789 mL at a certain temperature and pressure, what volume would 0.376 mols of neon occupy under the same conditions? what Law is used to solve?

### Chemistry

Determine the entropy change when 7.40 mol of HCl(l) boils at atmospheric pressure. I already have the delta Sfus(12.5 J/Kmol) and delta Svap(93.2 J/Kmol), I just cant seem to figure out the last part.

### chemistry ap

Assuming all volume measurements are made at the same temperature and pressure, what volume of hydrogen gas is needed to react completely with 3.25 L of oxygen gas to produce water vapor? Answer in units of L.

### Chemistry

Samples of NH3 and 02 are placed in a rigid container. When the equilibrium below is established, the partial pressure of H2O is 0.784 atm. What is the partial erasure of NO when the system is at equilibrium? 4NH3 + 5O2 -----> 4NO + 6H2O

### Chemistry

Ammonia may be oxidised to nitrogen monoxide in the presence of catalyst according to the equation 4 NH3 + 5 O2 gives 4 NO and 6 H2O. If 27 litres of reactants are consumed , what volume of nitrogen monoxide is produced at the same temperature and pressure.

### Chemistry

When 10.00 mL of 1.00 M HCl solution is mixed with 115 mL of 0.100 M NaOH solution in a constant-pressure calorimeter, the temperature rises from 22.45 °C to 23.25 °C. Calculate q for this reaction, assuming that the heat capacity of the calorimeter is the same as that of ...

### Science chemistry

a steel cylinder of oxygen with a volume of 15 L was available for medical purposes. The cylinder pressure decrease from 40.6 to 38.5 atm during which time the temperature remain at 24.0 °C how many moles of oxygen had been removed

### chemistry

Consider the reaction below. C3H8 + 5 O2 3 CO2 + 4 H2O How many litres of CO2 will be produced when 10.0 L of O2 are completely reacted with C3H8? Assume that the volumes of the reagents and products are measured at constant pressure and temperature.

### chemistry

a 100 W electric heater operates for 10 minutes to hear the gas in a cylinder. At the same time, the gas expands from 1 L to 14 L against a constant atmospheric pressure of 4.246 atm. What is the change in internal energy in Joules of the gas?

### Chem

To what temperature in K must a variable volume container of helium gas be cooled to obtain a final volume of 0.182 L? The initial volume and temperature are 2.34 L and 314 K, respectively. The pressure and number of moles are fixed. You're supposed to us V1/T1=V2/T2, and I ...

### Chemistry

At 25 C, the pressure and volume of a gas are 1.2 atm and 33 L. What is the volume of the gas at STP?

### physics

Assuming bicycle tires are perfectly flexible and support the weight of bicycle and rider by pressure alone, calculate the total area of the tires in contact with the ground. The bicycle plus rider has a mass of 80.0 kg, and the gauge pressure in the tires is 3.50×105 Pa

### Physics

Incandescent lightbulbs are filled with and inert gas to lengthen the filament life. With the current off ( at t= 20.0 degrees Celsius), the gas inside a lightbulb has a pressure of 115kPa. When the bulb is burning, the temperature rises to 70.0 degrees Celsius. What is the ...

### Physics

The Volume of air in a car tire is 800cm^3 and the pressure is 290kPa. Determine the volume the air would occupy as soon as the tire bursts on a day when the atmospheric pressure is 204kPa. (Assume that the temperature remains constant and assume an ideal gas)

### Physics

The Volume of air in a car tire is 800cm^3 and the pressure is 290kPa. Determine the volume the air would occupy as soon as the tire bursts on a day when the atmospheric pressure is 102kPa. (Assume that the temperature remains constant and assume an ideal gas)

### Chemistry II

A syringe with a movable piston, contains 0.057g of carbon dioxide gas at 23.5C. If the pressure in the syringe was 953mmHg, what would be the volume of the gas in the syringe? I got 2.59L, but it was wrong.

### chemistry

a gas is collected at 740 mm and 23 degrees C. The volume is not measured until the next day when the pressure is 745 mm and the temperature 29 degrees C, at which time the volume is found to be 15.3 ml. What was the original volume?

### chemistry

Calculate the value of the equilibrium constant (Kp) for the reaction displayed if the following equilibrium pressure data were measured at 25.00 °C: P(H2(g)) = 0.2282 atm, P(I2(g)) = 0.1646 atm, P(HI(g)) = 5.462 atm. H2(g)+I2(g) = 2HI(g)

### Chemistry

A helium balloon is filled to a volume of 2.88 x 10^3L at 722 mm Hg and 19 degrees Celcius. When the balloon is released, it rises to an altitude where the pressure and temperature are 339 mm Hg and -55vC, respectively. What is the volume of the balloon?

### Chemistry

Chlorine gas, CL2 is used to purify water. How many moles of chlorine gas are in a 7.00L tank if gas has a pressure of 865mmHg anf temp of 24 degree celcius?

### chemistry

Boron forms a gaseous compound with hydrogen with empirical formula BH3. a 1.05L sample of this compound at a pressure of 88 mm Hg at 295K has a mass of .138g. what is the molecular formula of the compound?

### ap chemistry

We mix 146 grams of oxygen gas with 117 grams of argon gas in a volume of 436 mL at 58C. What will be the final pressure of the gas mixture? Answer in units of atm

### Gas Law problems ( Chemistry)

the initial temperature of a 1l sample of gas is 20c. The pressure is decreased from 720mmhg to 36mmhg and the volume increases to 2.14l. What was the final temperature of the gas?

### Chemistry

Glycerol is a nonvolatile water soluble material. It's density is 1.25g/ml. Predict the vapor pressure of a solution of 2.40E2 ml of glycerol, in 385ml of water, at the normal boiling pt of water.

### AP Chemistry

The normal boiling point of methanol is 64.7°C. A solution containing a nonvolatile solute dissolved in methanol has a vapor pressure of 642.3 torr at 64.7°C. What is the mole fraction of methanol in this solution?

### thermodynamic

Energy is added to a piston-cylinder arrangement. The piston is withdrawn in such a way that the temperature remains constant. The initial pressure and volume are 200 KPa and 2m^3, respectively. If the final pressure is 100 KPa, determine the work done by the ideal gas on the ...

### CHEM

a gas bulb is connected to an open end manometer. the pressure in the bulb is .355 torr MORE than atmospheric pressure. If the manometer is filled with mineral oil (density .888 g/cm^3) then what wil be the difference in height between the two sides of the manometer? (density ...

### physics

A fixed mass of gas has a pressure of 8700 Pa, a volume of 10.5 m3 and temperature of 68 °C. The pressure and volume of the gas are changed to 9 243 Pa and 14.4 m3. The new temperature of the gas is

### chem

a sealed cylinder of a gas contains nitrogen gas at 1.00*10^3 kPa pressure and a temperature of 20C. They cylinder is left in the sun and the temperature of the gas increases to 50C. What is the new pressure in the cylinder?

### Chemistry

I'm trying to find the dry gas pressure of H2 in mmHg. The barometric pressure is 765.3 mmHg, the vp of H20 is 23.76 mmHg and the gas collected was 25.6 mL. this is what i did. 765.3 mmHg - 23.76 mmHg - (25.6 Ml/13.6 mmHg) = 739.66 = 740 mmHg 93 sig figs). Then I have to use ...

### Physics

The lowest pressure attainable using the best available techniques is about 10^-12 N/m^2. At such pressure, how many molecules are there per cm^3 at 0 degrees C. I know that PV= nRT and that you solve for n/v = P/RT. I have also converted from N/m^2 to atm and am using R = ....

### Chemistry

Convert a pressure of 23.8 in. Hg into kilopascal. Ok so I looked up kilopascal and it Said 1 Kpa = 1000 pa So I began to set it up like this 23.8 / 29.2 x1000 am I correct Chemistry - DrBob222, Thursday, October 13, 2011 at 1:48pm I don't think that will get it. I would go ...

### Chemistry

A weather ballon is prepared to lift off at the North Pole. The balloon is filled with 15000 L of helium gas. The conditions at the launch site are 760 mm Hg and 0 degrees celsius. The balloon is then released and rises to a height of 20,000 m. The atmospheric pressure ...

### physics

An automobile tire has a pressure of 325 kPa when the temperature is 10 degrees Celsius. If the temperature of the tire rises to 50 degrees Celsius and its volume is constant,what is the new pressure?

### chemistry

A 2.34L container of H2(g)at 752mmHg and 24 degrees is connected to a 3.17L container of He(g) at 717mmHg and 24 degrees. After mixing, what is the total gas pressure, in millimeters of mercury, with the temperature remaining at 24 degrees?