osmotic pressure chemistry

63,583 results, page 25

AP Chemistry

In a fit of boredom, a chemistry teaching assistant swallows a small piece of solid dry ice (CO2). The 8.9 g of dry ice are converted very quickly into gas at 311 K. Assuming the TA’s stomach has a volume of 1.5 L, what pressure is exerted on his stomach?

chemistry

A student generates H2(g) over water using the reaction between zinc and hydrochloric acid Zn(s)+ 2HCl(aq)---> ZnCl2(aq)+ H2(g) Data: Mass of vial and zinc 15.5082 mass of vial 15.3972 mass of zinc 0.111 final burette reading 45.30mL barometric pressure: Patm 100.6kPa ...

chemistry

A solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC (assuming ideal behavior) is: Answer

chemistry

A solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC (assuming ideal behavior) is: Answer

college chemistry

A solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC (assuming ideal behavior) is:

Chemistry

a change in pressure would have the greatest effect on the solubility of a A. solid in a liquid B. gas in a liquid C.liquid in a liquid D.liquid in a solid in an aqueous solution of potassium chloride, the solute is A. Cl B. KCl C. H20 D. K B for the aqueous solution one ...

Science

Consider the isothermal expansion of 4.50 mol of an ideal gas at 450 K from an initial pressure of 12.0 bar to a final pressure of 2.75 bar. Describe the process that will result in the greatest amount of work being done by the system and calculate work Describe the process ...

physics

The sound level in decibels is typically expressed as β = 10 log (I/I0), but since sound is a pressure wave, the sound level can be expressed in terms of a pressure difference. Intensity depends on the amplitude squared, so the expression is β = 20 log (P/P0), where ...

physics

The sound level in decibels is typically expressed as β = 10 log (I/I0), but since sound is a pressure wave, the sound level can be expressed in terms of a pressure difference. Intensity depends on the amplitude squared, so the expression is β = 20 log (P/P0), where ...

physics

The sound level in decibels is typically expressed as β = 10 log (I/I0), but since sound is a pressure wave, the sound level can be expressed in terms of a pressure difference. Intensity depends on the amplitude squared, so the expression is β = 20 log (P/P0), where ...

structure / physic

1. Aquarium (Retaining Buttresses) Background: In a liquid, pressure develops from the weight of the liquid above any point. That pressure is called Hydrostatic pressure and acts equally in all directions. The pressure at any given depth is given by the following formula: p = ...

Chemistry

A 0.188g sample of unknown metal, X (s), produced 71.4 ml of hydrogen gas when reacted with HCL according to the equation: X(s)+2HCL(aq)--->XCl2(aq)+H2(g) The gas was collected over water at 23 degrees Celsius. The levels of water inside and outside the gas collecting tube ...

Physics

The atmosphere of Mars exerts a pressure of only 600 Pa on the surface and has a density of only 0.02 kg/m3. (a) What is the thickness of the Martian atmosphere, assuming the boundary between atmosphere and outer space to be the point where atmospheric pressure drops to 0.01% ...

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 compensate, what would ...

Physics

At one point in a pipeline, the water's speed is 3.00 and the gauge pressure is 4.00×104 . Find the gauge pressure at a second point in the line 11.0 lower than the first if the pipe diameter at the second point is twice that at the first. I've been trying to use Bernoulli's ...

Chemistry

At 298 K, deltaGo = - 6.36 kJ for the reaction: 2N2O(g) + 3O2(g) ↔ 2N2O4(g) Calculate deltaG (in kJ) at 298 K when PN2O = 3.12 atm, PO2 = 0.0081 atm, and PN2O4= 0.515 Calculate deltaG (in kJ) at 298 K for some solid ZnF2, 0.025 M Zn2+ and 0.038 M F-(aq). Would these two ...

Chemistry! Please Help!

Lime (CaO) is used to prevent SO2 from escaping smokestacks of coal burning power plants by the formation of solid CaSO4•2H2O also known as the mineral gypsum. One of the important reactions in the overall process is the dissociation of CaCO3(s). b. If a 12.0 g sample of ...

AP Chem

(NH4)2CO3 <-> 2NH3 + CO2 + H2O solid (NH4)2CO3 is placed in an evacuated container at 115C. When equilibrium is reached Kp = 1.93x10^-3. Extra NH3 gas is added, when equilibrium is reestablished, the partial pressure of NH3 is four times the partial pressure of H20. What...

Physics

An automobile tire is inflated with air originally at 10.0°C and normal atmospheric pressure. During the process, the air is compressed to 28.0% of its original volume and the temperature is increased to 36.0°C. a) What is the tire pressure? b) After the car is driven at ...

PHYSICS

The pressure and volume of an ideal monatomic gas change from A to B to C. From A to B, volume remains 0.400 and pressure rises to 4.00x10^5. From B to C, volume changes from 0.400 to 0.200 while pressure remains the same. There is a curved line between A and C and is an ...

Chemistry

I need help with this question. If the solubility of a gas in water is 6.0 g/L when the pressure of the gas above the water is 2.0 atm, what is the pressure of the gas above the water when the solubility of the gas is 3.0 g/L?

chem

If a gas is cooled from 323.0 K to 273.15 K and the volume is kept constant, what final pressure would result if the original pressure was 750.0 mm Hg? Round to the nearest tenth. Don't forget the units.

chem :(

If a gas is cooled from 323.0 K to 273.15 K and the volume is kept constant, what final pressure would result if the original pressure was 750.0 mm Hg? Round to the nearest tenth. Don't forget the units.

Chemistry

I need help with this question. 1. You have a tank of helium with a volume of 10 liters that is currently under 40 atm of pressure. If you open the valve on the tank and release the helium into a room with a volume of 10,000 liters, how many atmospheres of pressure will the ...

Physics

The cross-sectional area of the U-tube shown below is uniform and is equal to one square centimeter (1.00cm^2). One end is open to the atmosphere. Atmosphere pressure may be taken as P1=1.01 * 10^5 Pa. The other end of the U-tube is connected to a pipe in which a constant gas ...

PHYSICS

The cross-sectional area of the U-tube shown below is uniform and is equal to one square centimeter (1.00cm^2). One end is open to the atmosphere. Atmosphere pressure may be taken as P1=1.01 * 10^5 Pa. The other end of the U-tube is connected to a pipe in which a constant gas ...

PHYSICS

The cross-sectional area of the U-tube shown below is uniform and is equal to one square centimeter (1.00cm^2). One end is open to the atmosphere. Atmosphere pressure may be taken as P1=1.01 * 10^5 Pa. The other end of the U-tube is connected to a pipe in which a constant gas ...

chemistry

The following reaction is at equilibrium at a pressure of 1 atm, in a closed container. NaOH(s) + CO2(g) NaHCO3(s); ΔH°rxn < 0 Which, if any, of the following actions will decrease the concentration of CO2 gas present at equilibrium? A. lowering the temperature B. ...

PHYSICS

One mole of oxygen gas is at a pressure of 5.25 atm and a temperature of 29.5°C. (a) If the gas is heated at constant volume until the pressure triples, what is the final temperature? ____°C (b) If the gas is heated so that both the pressure and volume are doubled, what is ...

chemistry

how to solve for a 28.4 L sample of methane gas is heated from 35.0° C to 76.0° C. The initial pressure of the gas is 1.00 atm at 35.0° C. Assuming constant volume, what is the final pressure of the gas? OK, I did the following: P₁ = 28.4 L P₂ = ? T₁ = 41....

CHEMISTRY

1.Chemistry Question: A 0.1 M solution of acetic acid is titrated with 0.05M solution of NaOH. What is the pH when 60% of the acid has been neutralized? The equilibrium constant (Ka) for acetic acid is 1.8x10^-5 2. Chemistry question: On average, how far is a molecule of air ...

physics

a)a box having mass of 500kg is placed on a horizontal surface.find the pressure exerted on the surface?do not forget to write formula. b)a pond of water filled with water upto 60m.1)write formula to find the pressure of water exerted on the base of pond.2)calculate the ...

chemistry

Predict the effect of each of the following on the indicated equilibrium system in terms of which reaction will be favored (forward, reverse, or neither) H2(g)+Cl2(g)<=>2HCl(g) +184 kJ A)addition of Cl2 B)removal of HCl C)increased pressure D)decreased temperature E)...

chemistry

Under what conditions of temperature and pressure do you think that the gas laws would work best? List specifics.

Chemistry

Predict the order of increasing vapor pressure at a given temperature for the following compounds: CH3CH2CH2CH2OH HOCH2CH2CH2OH CH3CH2OCH2CH3

chemistry

At a low pressure and a high temperature, what state of a substance is most likely to exist? Gas Liquid Solid

Chemistry II

what is the molar mass of a gaseous organic compound with a density of 3.38 g/L at 40oC and a pressure of 1.97 atm? I got 4.41M, is this correct?

Chemistry

Calculate how many milliliters of carbon dioxide would be produced theoretically from 2.0g of sucrose at 25 deg Cel and 1 atm pressure.

chemistry

A 450 ml gas sample STP is compressed to 200 ml and the temp. Increased to 42 degrees celcuis. What is the new pressure.

Chemistry

What happens to a 4L volume of gas as you change the pressure from 6 atm to 760 torr? What law was used, and show work

Chemistry

A gas mixture contains 1.16 g N2 and 0.89 g O2 in a 1.49 L container at 16 degrees C. What is partial pressure of N2 & O2? *I already know the mole fraction for N2 is 0.60, and 0.40 for O2. I just don't know where to go from here.

chemistry

0.361g of an unknown liquid occupied a volume of 250.0 ml Hg pressure and 100 degrees celcius. what is the molar mass?

chemistry

Express the approximate density of carbon dioxide gas at 0 degrees C and 2.00 atm pressure in grams per liter.

Chemistry

What kind of pressure would be exerted by 5 moles of water vapor if it were contained in a 0.5 liter bottle heated to 1000K?

chemistry

If a volume of nitric oxide gas at 25.0°C increases from 2.00 L to 3.00 L, what is the final Celsius temperature? Assume pressure remains constant

Chemistry

3 H2 (g) + N2 (g) --> 2 NH3 (g) How many liters of ammonia gas can be produced from 10.0 L of N2 and 20.0 L of H2? Assume all gases are measured at the same temperature and pressure.

chemistry

how much heat is required to raise the temperature of one mole of NaCl(s) by 15 degrees celsius at constant pressure

Chemistry 1001

At which pressure would carbon dioxide gas be most soluble? 600torr, 700torr 800torr or 900torr

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? Thank you

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? Thank you

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? Thank you

Chemistry

the temperature of a gas in sealed container changes from 20. c to 40.0 C. If the volume remains constant,the pressure will change from 660 torr to ?

chemistry

A sample of neon gas at 1.20 atm compresses from 0.250 L to 0.125 L. If the temperature remains constant, what is the final pressure?

Chemistry

A certain substance has a heat of vaporization of 34.65 kj/mol. At what kelvin temperature will the vapor pressure be 3.50 times higher than it was at 331 k?

chemistry

what pressure, in atmosphere, is exerted by 0.52 mol of water vapor at its boiling point of 100 degrees celcius in a 3L teakettle?

chemistry

26 g of methane CH4 has a pressure of 450 kPa at 250 degrees celcius find the volume occupied by the gas

Chemistry

A 350 ml of gas at 1.25 atm and 298 K is heated to 343 K an the volume increased to 750.0ml. What is te new pressure?

Chemistry

How many moles of a gas do you have if it is under 800.mmHg of pressure in a 500.mL flask at a temperature of 32 degrees fahrenheit?

chemistry

What is the pressure in a 1.5 L vessel containing 0.25 moles of )2 if the temperature is 37 degrees C? R the universal gas constatn is 0.082 L atm/mole K

Chemistry-Help

The pressure of gas is measured at 550 mm Hg. How do you calculate this to Torr, lb/in2, atm, and in Hg? Please show conversions so that I can understand? Thank you!

Chemistry

At constant temperature and pressure, what is the maximum volume, in liters, of HNO3(g) that can be made from 10.39 L of NO2(g) and 15.53 L of H2O(g)? I don't even know how to start it...

chemistry

2.85 sample of an unknown chlorofluorocarbon is decomposed and produces 558 of chlorine gas at a pressure of 756 and a temperature of 298 .

Chemistry

What is the temperature of 0.45mol of gas at a pressure of 1.0at and a volume of 10.1L ? if anyone can tell me what i need to do to solve this problem it would be helpful

Chemistry

How many moles of a gas fill a flask with a volume of 141 mL at 101 degrees Celsius and a pressure of 761 torr?

Chemistry

A balloon from the local toy store has a volume of 6.6 liters and an internal pressure of 2.4 atmospheres at 22°C. How many moles of gas does it contain?

Chemistry

What volume of H2(g), stored at 26°C at a pressure of 141 atm, would be needed to run an electric motor drawing a current of 8.4 A for 4.8 h?

Chemistry

Calculate the pressure exerted by a 14.6 mol NH3g in a 3.2 L container at -15.0 celcius using the Van der Waals equation.

Chemistry

Calculate the work done (in joules) by a chemical reaction if the volume increases from 3.3L to 3.5L against a constant external pressure of 3.7atm .

chemistry

given an atmospheric pressure of 750mm Hg, find the partial pressures of nitrogen, oxygen. carbon dioxide and argon

AP Chemistry

On a hot sunny day in August, the weather- man reports that the barometric pressure is 39 atm atmospheres. How many Pascals is this?

chemistry

Q2: A sample of carbon dioxide(CO2) has a mass of 55g and occupies 3.3L at 100C. What pressure does the gas exert (in kPa)?

Chemistry

A certain substance has a heat of vaporization of 26.49 kJ/mol. At what Kelvin temperature will the vapor pressure be 5.00 times higher than it was at 285 K?

chemistry

A sample of hydrogen chloride gas occupies 0.550L at STP. What is the pressure in atm if the volume is 7.50×10−2L at 20∘C?

chemistry

Calculate the volume that4.0mol of an ideal gas would occupy at 8.0 atmospheres pressure and 1700c (R=8.31mol-1k-1)

Chemistry

If one mole of each is dissolved in 1.00 L of water, which will lower the vapor pressure the most? Why? A)C12H22O11 B)C3H7OH C)NaNO3 D)MgCl

chemistry

a sample of freon-12 occupies 25.5 litters at 28 celsius find its volume at 15 degree celcius when the pressure is kept constant

chemistry

A sample of neon gas at 1.20 atm compresses from 0.250 L to 0.125 L. If the temperature is held constant, what is the final pressure?

chemistry

Calculate the percent deviation from ideal behavior for 0.85 mol of CO2 gas in a 1.20 L container at 45.0°C, which exerts a pressure of 19.2 atm.

Chemistry

Calculate the percent deviation from ideal behavior for 1.03 mol of CO2 gas in a 1.10 L container at 35.0°C, which exerts a pressure of 20.3 atm.

chemistry

2 mole of helium is mixed with 2 gram of hydrogen.find the molar heat capacity of the mixture at contant pressure.

chemistry

300 ml of a gas at 27oC is cooled to 3oC at constant pressure.its final volume is? [please explain clearly]

chemistry

calculate the volume of oxygen at 15 degree Celsius and 745mmHg pressure. which could be obtained by heating 10g of potassium trioxochlorate(v)

chemistry

The Henry's law constant for CO2 is 3.1 x 10-2 mol/L-atm at 25°C. What pressure would be necessary in order to have a .25 M solution?

chemistry

3.58 gram sample of an unknown gas is found to occupy a volume of 2.37 L at a pressure of 808 mm Hg and a temperature of 60 oC. What is the molecular weight?

Chemistry

Can you please explain to me how you would regulate the pressure to favor the products in the this equilibrium system. MgCO3(s)--><-- MgO(s)+CO2(g) Thank you

Chemistry

Can you please explain to me how you would regulate the pressure to favor the products in the this equilibrium system. MgCO3(s)--><-- MgO(s)+CO2(g) Thank you

Chemistry

Can you please explain to me how you would regulate the pressure to favor the products in the this equilibrium system. MgCO3(s)--><-- MgO(s)+CO2(g)

chemistry

to what temperature must a given mass of nitrogen at zero degree be heated so that both it volume and pressure will be doubled

Chemistry

Equal weight of methane and hydrigen are mixed in an empty container at 25°C. The fraction of the total pressure exerted by hydrogen is

physical chemistry

Calculate molarity of air having malar mass 28.8cotaining N2 and O2 only at 273kelvin and 1atm pressure

Chemistry II

Calculate the volume of oxygen at 10 degrees Celsius and 1.6 atm pressure that can be produced by decomposing 128g of hydrogen peroxide

chemistry

Assuming all gases are at the same temperature and pressure, how many milliliters of hydrogen iodide are produced from 165 mL of H2? H2(g)+I2(g)→2HI(g)

chemistry

Analysis of aluminum-zinc alloy Mass of gelatin capsule 0.1284 g ambient temp. 22c mass of capsule plus alloy sample 0.3432g ambient temp_________K mass of alloy sample, m__________g barometric pressure 745 mm Hg mass of empty beaker 144.5g Vapor pressure at H2O at ...

science help

What is the relationship between atmospheric pressure and the density of gas particles in an area of increasing pressure? As air pressure in an area increases, the density of the gas particles in that area decreases. As air pressure in an area increases, the density of the gas...

science help

What is the relationship between atmospheric pressure and the density of gas particles in an area of decreasing pressure? As air pressure in an area decreases, the density of the gas particles in that area decreases. As air pressure in an area decreases, the density of the gas...

Chemistry

How many grams of carbon tetrachloride CCL4 must be mixed with 35.96g of ethyl acetate CH3COOCH2CH3 at 50? celsius to produce a solution with a vapor pressure above the solution of 291.8 torr. The vapor pressure of pure carbon tetrachloride and ethyl acetate at 50 celsius are ...

Chemistry 101

Are these correct? 1. A sample of gases contains three gases at the following pressures: 1.2 atm N2, 3.2 atm O2, and 0.56 atm Xe. What is the total pressure in the container? a. 5.0atm b. 1.4atm c. 2.2atm d. 1.0atm e. 1.7atm I am pretty sure it is A. Is that correct? 2. The ...

Chemistry

When 0.40 g of impure zinc reacted with an excess of hydrochloric acid, 127 mL of hydrogen was collected over water at 10 degress C The external pressure was 737.7 Torr. a) What volume would the dry hydrogen occupy at 1.00 atm and 298 K ? b) What amount (in moles) of H2 was ...

AP Chemistry

Part 1 of 3: An apparatus consists of a 2 L flask containing nitrogen gas at 30 degrees C and 758 kPa, joined by a valve to a 11 L flask containing argon gas at 30 degrees C and 49.7 kPa. The valve is opened and the gases mix. What is the partial pressure of nitrogen after ...

Statistic

In a population of over 15,000 patients, the distribution of systolic blood pressure follows the normal curve. Investigators believe the average systolic blood pressure in the population is 120 mm. The investigators take a simple random sample of 6 patients from this ...

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