osmotic pressure chemistry
63,810 results, page 11

chemistry 106
Dry air near sea level has the following composition by volume: N2, 78.08 percent; O2, 20.94 percent; Ar, 0.93 percent; CO2, 0.05 percent. The atmospheric pressure is 1.00 atm. (Hint: Since volume is proportional to the number of moles present, mole fractions of gases can be ... 
Physics
2. On the inside of an airplane the air pressure is about 85% of the atmospheric pressure at sealevel while outside, when it is cruising, the pressure is about 25% of the sealevel atmospheric pressure. If a window is 0.46 m in diameter, what is the net outward force on the ... 
College Chemistry
A 38 L gas tank at 35 Celsius has nitrogen at a pressure of 4.65 atm. The contents of the tank are transferred without loss to an evacuated 55.0L tank in a cold room where the temperature is 4 Celsius. What is the pressure of the tank?? 
chemistry
an air bubble is released at the bottom of a lake where the temperature is 4 celsius and the pressure is 3.40 atm. if the bubble was 10.0 ml to start, what well its volume be at the surface, where the water temperature is 12 celsius and the pressure is 103 kpa? 
Chemistry
What is the equilibrium partial pressure of water vapor above a mixture of 37.5 g H2O and 62.5 g HOCH2CH2OH at 55 degree C. The partial pressure of water at 55 degree C is 118.0 mm Hg. Assume ideal behavior for the solution. 
Chemistry
The equilibrium constant Kp for the reaction below at 700°C is 0.76 atm. CCl4(g) C(s) + 2 Cl2(g) Determine the initial pressure of carbon tetrachloride that will produce a total equilibrium pressure of 1.20 atm at 700°C 
Chemistry
The equilibrium constant Kp for the reaction below at 700°C is 0.76 atm. CCl4(g) > C(s) + 2 Cl2(g) Determine the initial pressure of carbon tetrachloride that will produce a total equilibrium pressure of 1.20 atm at 700°C 
Chemistry
HELP PLEASE the volume of a sample of oxygen is 200.0ml when the pressure is 3.00atm and the temp is 37.0 C. What is the new temp if the volume increases to 400.0ml and the pressure decreases to 2.000 atm? 
Chemistry
A container with a volume of 19.6 L that has temperature of 37C and a pressure of 0.900 atm has its temperature lowered to 0.00C and its pressure raised to 1.90 atm. What will the new volume be? Assume that the number of moles is constant. 
chemistry
4. A container of gas has a volume of 3.5 L and a pressure of 0.8 atm. Assuming the temperature remains constant, what volume of gas would result if the pressure was 0.5 atm? A. 1.8 L B. 5.6 L C. 0.2 L D. 2.2 L My guess is B but I just want to double check 
Chemistry
A sample of nitrogen gas is collected overwater at a temperature of 23◦C. What is the pressure of the nitrogen gas if the atmospheric pressure is 744 mmHg? Answer in units of mmHg. Not sure of formula for this 
science chemistry
A given mass of helium(gas)occupies a volume of 3,6m^3 at a pressure of 105 kPa.if the temperature remains constant,calculate volume of the gas if the pressure is decreased to 70 kPa. 
Chemistry
What would the partial pressure of hydrogen in the gas collection tube be if the water in the tube was 25.0 mm above the water level in the beaker, the room pressure was 655 mm Hg, and the temperature of the room was 22 degrees C? 
chemistry
Calculate the value of the equilibrium constant (Kp) for the reaction shown, if F(g) was found to be 96.80 % decomposed at 1000 K when its initial pressure was 4.638 atm. The initial pressure of the reaction products is 0 atm. 2F(g) = F2(g) 
Chemistry
the vapour pressure of a solution having 2g of solute X ( molar mass=32)in 100g of CS2(vapour pressure = 854 torr)is 848.9 torr. The molecular formula of solute is? 
chemistry
If the pressure on a 2.50 mL gas sample were doubled from 0.500 atm to 1.00 atm, what would be gas volume at the new pressure? my Answer 1.25 mL if i'm wrong can you show me how u got to your answer please. 
Chemistry
The vapor pressure of benzene (C6H6) at 25 degrees C is 95.1 mm Hg. What is the vapor pressure of benzene above a solution in which 5.05 g C6H5COOH (benzoic acid) is dissolved in 25 g C6H6? Answer should be 93.9 mmHg 
chemistry
Air trapped in a cylinder fitted with a piston occupies 145.7 mL at 1.08 atm pressure. What is the new volume of air when the pressure is increased to 1.34 atm by applying force to the piston? 
Chemistry
Consider the evaporation of water at 298 K and 1 atm pressure: H20 (l) <> H20 (g) Given that ΔGOrxn= 8.6kJ/mol, what is the equillibrium vapor pressure of water at 298 K? 
chemistry
A sample of ideal gas at room temperature occupies a volume of 32.0L at a pressure of 272torr . If the pressure changes to 1360torr , with no change in the temperature or moles of gas, what is the new volume, V 2 ? 
chemistry
50cm3 of hydrogen is collected over water at 17 degree celsius and 750 mm Hg pressure.Calculate the volume of dry gas at S.T.P.The water vapour pressure at 17 degree celsius is 14 mm Hg? 
Chemistry
determine the vapor pressure lowering at 27 C of a solution of 750g of sucrose, dissolved in 180g of water. The vapor pressure of pure water at 27 C is 26.7 torr. Assume the solution is ideal 
Chemistry
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
The Kp for the production of phosgene is 18.0. If one mole each of CO and Cl2 are mixed at the total pressure of 1 atm, what will be the partial pressure (in atm) of COCl2 after equilibrium is reached, CO(g) + Cl2(g)>COCl2(g) 
chem
A gas has pressure of 4.62 atm when its volume is 2.33 L if the temperature remains constant, what will the pressure be when the volume is changed to 1.03 L? express the final pressure in torrs 
Physics
Mercury has a density of 13600 kg/m3. At what depth in millimetres is the pressure in mercury equal to that of standard atmospheric pressure? (take std pressure= 101 Pa) 
Physics
Mercury has a density of 13600 kg/m3. At what depth in millimetres is the pressure in mercury equal to that of standard atmospheric pressure? (take std pressure= 101 Pa) 
chemistry
an ideal gas in a closed inflexible container has a pressure of 6 atms and a temperature of 27 degree c. What will be the new pressure of gas of temperature is decreased to 73 degree c. 1) 2atm 2) 3atm 3) 4atm 4) 8atm 5) 9atm 
Chemistry
A 3.43 L flask is filled with carbon monoxide at 27 °C until the pressure is 8.31 atm. Calculate the total pressure after 2.09 moles of carbon dioxide has been added to the flask. (R=0.082 Latm/K mol) 
Chemistry
At the temperature of 30degree C and pressure of 1*10^5 pa, 30dm3 of H2 gas is burned with 30dm3 of O2 gas in a container of 60dm3. Calculate the pressure different after the complete combustion and cooling upto 30degree C again. 
Chemistry
A gas mixture containing N2 and O2 was kept inside a 2 L container at a temperature of 23 C and a total pressure of 1 atm. The partial pressure of oxygen was .722 atm. How many grams of nitrogen were present in the gas mixture? 
Chemistry
Exactly 1.0 mole of oxygen and 7.0 moles of nitrogen gas are in a container. The total gas pressure is 5.7 atm. What is the partial pressure of nitrogen in atm? I'm not sure how to go about setting up the problem. Any help is appreciated! 
Chemistry
A small cylinder of helium gas used for filling balloons has a volume of 2.85L and a pressure of 13300kPa at 25 ∘C.How many balloons can you fill if each one has a volume of 1.50L and a pressure of 1.26atm at 25 ∘C? 
chemistry
At atmospheric pressure, a sample of O2 gas has a volume of 55mL at 27 degrees celcius. What volume in mL will the O2 gas occupy if the temperature is decreased 0 degrees C and the pressure is held constant? 
chemistry
A volume of 35.0 mL of nitrogen gas was collected over water at 24 degrees C and 99.1kPa. The vapor pressure of water at this temperature is 2.99 kPa. What is the pressure of the nitrogen gas alone? 
ChemistryGas Laws
At 0 degrees celcius, a 1.0 L flask contains 5.0 x 10^2 mol N2, 1.5 x 10^2 mg O2, 5.0 x 10^21 molecules NH3. Calculate the partial pressure of each gas and what is the total pressure in the flask. How do I calculate this? 
CHEMISTRY
A Sample of gas originally at 25 degrees C and 1 atm pressure in a 2.5 L container is allowed to expand until the pressure is .85 atm and the temperature is 15 degrees C. What is the final volume of gas? Did anyone get 2.6 L 
CHEMISTRY
A Sample of gas originally at 25 degrees C and 1 atm pressure in a 2.5 L container is allowed to expand until the pressure is .85 atm and the temperature is 15 degrees C. What is the final volume of gas? Did anyone get 2.6 L 
chemistry
A sample of gas in a closed container at a temperature of 83C and a pressure of 9 atm is heated to 259C. What pressure does the gas exert at the higher temperature? Answer in units of atm 
Chemistry
In an experiment, 25.0 mL of a gas with a pressure of 1.00 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 0.750 atm. What is the volume of the gas under the new conditions? 
chemistry
A chamber has a volume of 17 m3 and operates at a pressure of 4.66 atm. What volume in cubic meters would the air in the chamber occupy if the pressure were changed to 1.64 atm at constant temperature? 
Chemistry
After the volatile liquid has been added to the Erlenmeyer flask, the total pressure in the flask equals the vapor pressure of the volatile liquid. True or False? 
chemistry
If four grams of Oxygen and four grams of Helium are placed in a five liter vessel at 338 K, what will be the partial pressure of each gas and the total pressure in the vessel? 
Chemistry
When 1 mole of ethylene (C2H4) is burned at constant pressure, 1410 kJ of energy is released as heat. Calculate (delta) H for a process in which 10.0 of ethylene is burned at constant pressure 
Chemistry
Calculate the pressure of the dry gas collected over water at 10 degree celcius and 750mmHg. Given that the vapour pressure of water at 10 degree celcius is 20mmHg 
Chemistry
At standard temperature and pressure (0∘C and 1.00atm), 1.00mol of an ideal gas occupies a volume of 22.4L. What volume would the same amount of gas occupy at the same pressure and 30∘C? 
chemistry
Nitroglycerine decomposes according the the equation: 4C3H5(NO3)3 > 12 CO2 + 10 H2O +6N2 + O2. 15.0 g of nitroglycerine is placed in a 500 ml flask at 25.0 C. The vapor pressure of water at this temperature is 23.8 mmhg. Find the total pressure in the flask after the ... 
chemistry
Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.8 of water upon warming from 25degree C to 50degree C . Assume that the water is initially saturated with nitrogen and oxygen gas at 25degree C... 
Chemistry
A XXg sample of methane, CH4, is mixed with YY atm of O2 (an excess) in a VV L combustion chamber at 125.0°C. The combustion reaction to CO2 and H2O is initiated and the vessel is cooled back to 125.0°C. What is the final pressure in the combustion chamber assuming the ... 
chemistry
hydrogen gas is collected in a bottle, and the pressure of the gas is 892 torr at 24 °C. what is the pressure of hydrogen gas when the temperature decreases to 20 °C? 
Chemistry
A mixture of gases contains 2.41 moles of O2, 1.24 moles of H2 and 1.92 moles of C. Calculate the partial pressure of gases if the total pressure is 3.0 atm 
Chemistry (Check)
A sample of gas has a volume of 12.0 L and a pressure of 20kPa. If the pressure of gas is increased to 50 psi, what is the new volume of the gas? Vf = 6.96 L 
Chem
The total pressure in a vessel containing hydrogen collected over water at 25.0°C was 0.8 atm. The vapor pressure of water at that temperature is 23.8. what was he pressure of the oxygen in torr? 
Physics
Suppose the cross sectional of the tube is 0.05 cm2, what would be the volume (a) during the lowest pressure in the experiment? (b) during the highest pressure? (c) at the atmospheric pressure? 
Chemistry
A McLeod gauge measures low gas pressures by compressing a known volume of the gas at constant temperature. If 315 cm^3 of gas is compressed to a volume of 0.0457 cm^3 under a pressure of 2.51 kPa what was the original gas pressure? 
Chemistry
A balloon originally has a volume of 4.39L at 44 C and a pressure of 729 torr. What temperature must the balloon be cooled to to reduce its volume to 3.78L at the same pressure? (A) 38 C (B) 72.9 C (C) 0 C (D) 546 C (E) 273 C Is the correct answer (E) 273 C? 
Chemistry
7.40 g of liquid methanol, CH3OH, are placed in an empty 20.0 L container at 45.0°C. What will be the pressure in the container when equilibrium is established? Assume the temperature remains constant and the volume of any liquid is negligible. The vapor pressure of methanol ... 
Chemistry
Determine the partial pressure of oxygen collected by water displacement if the water temperature is 20.0 ◦ C and the total pressure of the gases in the collection bottle is 760 torr. PH2O at 20.0 ◦ C is equal to 17.5 torr. 
Chemistry
A sample of oxygen at room temperature occupies a volume of 5.00x102 mL at 1.50 atm pressure. What pressure (in atm) must be applied to compress the gas to a volume of only 1.50x102 mL? Assume the temperature is constant. 
Chemistry
Calculate the pressure of 4.80g of ozone, O3, in a 2.45 L flask at 25 degrees C. Assume that the ozone completely decomposes to the molecular oxygen. 2O3(g) > 3O2(g) Calculate the pressure inside the flask once the reaction is complete. 
Chemistry
If the pressure of the gas inside the flask were increased and the height of the column in the openended arm went up by 0.5mm, what would be the new pressure of the gas in the flask, in torr? ANSWER IS 807.3 TORR 
Chemistry
A large balloon contains 65.0 L of helium gas at 25 °C and a pressure of 745 mm Hg. The balloon ascends to 3000 m, at which the external pressure has decreased by 30.%. What would be the volume of the balloon, assuming it expands so that the internal and external pressures ... 
chemistry
couple theory questions i don't quite understand... What is vapor pressure ad why does it change with temperature? and... The assumption was made that slight changes in the depth under the surface of the water will not significantly change total pressure in a graduated ... 
Chemistry
Using the information on the table of van der Waals Constants of Some Common gases, calculate the pressure exerted by 4.37 moles of chlorine gas confined in a volume of 2.45 L at 38 degrees Celsius. Compare the pressure with that calculated using the ideal gas equation. 
Chemistry
Using the information on the table of van der Waals Constants of Some Common gases, calculate the pressure exerted by 4.37 moles of chlorine gas confined in a volume of 2.45 L at 38 degrees Celsius. Compare the pressure with that calculated using the ideal gas equation. 
Chemistry
Using the information on the table of van der Waals Constants of Some Common gases, calculate the pressure exerted by 4.37 moles of chlorine gas confined in a volume of 2.45 L at 38 degrees Celsius. Compare the pressure with that calculated using the ideal gas equation. 
Chemistry
Neat pure ethanol C2H5OH has an enthalpy of vaporization of 39.3 Kj/mol, and a vapor pressure of 0.308 atm at 50 C. What is the boiling point, at atmospheric pressure of 1 atm, of a solution consisting of 35 G of phenol (a nonelectrolyte hydrocarbon with a molecular formula ... 
Chemistry
A sample of an ideal gas in a closed container (3.00 L) at 25.0 degrees C is heated to 300 degrees C. What is the pressure of the gas at this temperature? Do I use P1/T1=P2/T2? I was told to use that, but I don't know what pressure is. Thanks 
Chemistry
A weather balloon is inflated to a volume of 29.6 L at a pressure of 734 mmHg and a temperature of 27.0 C. The balloon rises in the atmosphere to an altitude, where the pressure is 360 mmHg and the temperature is 13.6 C. 
Chemistry
Calculate the vapor pressure of a solution of 0.48 mol of cholesterol in 6.0 mol of toluene at 32°C. Pure toluene has a vapor pressure of 41 torr at 32°C. (Assume ideal behavior.) 
chemistry
How many grams of NaCl must be added to 225.0 g of H2O at 45 °C to lower the vapor pressure of water by 2.21 mmHg? The vapor pressure of pure water is 71.93 mmHg at 45 °C. 
Chemistry
A sample of oxygen is collected over water at 22 C and 762 torr. What is the partial pressure of the dry oxygen? The vapor pressure of water at 22C is 19.8 torr 
Chemistry
A sample of oxygen is collected over water at 22 C and 762 torr. What is the partial pressure of the dry oxygen? The vapor pressure of water at 22C is 19.8 torr. 
Chemistry
A piston is holding 125 mL of gases at a temperature of 300 K and a pressure of 2.39 atm. What is the volume of the gases if the temperature is increased to 500K and the pressure falls to 2.15 atm? 
Chemistry
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. I know you use the formula P1V1 = P2V2 
Introduction to Chemistry
Hydrogen gas has a pressure of 765mm Hg, a volume of 355mL,and a temperature of 22 degrees C. What is the new volume of this gas if the pressure is 5.1atm,and at a temperature of 48degrees C? 
chemistry
A solution contains 5.00g of urea per 0.100kg of water (COCNH2)2 if the vapour pressure of pure water at 25°c is 23.7ton. What is the vapour pressure of the solution 
chemistry
The partial pressure of fluorine gas (F2) in a mixture of gases where the total pressure is 1.00 atm is 300. torr. What percent of the mixture is made of fluorine gas 
chemistry
The partial pressure of fluorine gas (F2) in a mixture of gases where the total pressure is 1.00 atm is 300. torr. What percent of the mixture is made of fluorine gas 
Chemistry
When 1 mole of ethylene (C2H4) is burned at constant pressure, 1410 kJ of energy is released as heat. Calculate dH for a process in which 10.0 g of ethylene is burned at constant pressure. 
Chem
An aqueous solution containing 21.6 mg of Vasopressin in 100 mL solution produces Osmotic Pressure of 3.70 mmHg at 25°C. Calculate the Molecular Mass of Vasopressin. Here's what I started working on, but then I got stuck. 21.6 mg = 0.0216 g v = 100 mL = 0.1 L ð = 3.70 mmHg... 
physics
If a scuba diver descends too quickly into the sea, the internal pressure on each eardrum remains at atmospheric pressure while the external pressure increases due to the increased water depth. At sufficient depths, the difference between the external and internal pressures ... 
CHM 1010
Under pressure of 862kPa, a gas has a volume of 752ml. The pressure is increased, without changing the temperature, until the volume is 624ml. What is the new pressure 
science
Helium has the lowest boiling point of the elements. The slightest change in temp can cause it to vaporize and expand. To prevent pressure explosions, a line from the tank has a "burst disk" in case a of sudden pressure increse. then the diaphragm would rupture and release the... 
chemistry
How will the following system at equilibrium shift in each of the following cases? 2 SO3(g) <> 2 SO2(g) + O2(g) H° = 197 kJ (a) SO2(g) is added (b) the pressure is decreased by increasing the volume of the container (c) the pressure is increased by adding Ne(g) (d) ... 
college chemistry
please help! If the initial pressure of I2(g) is 1.738 atm, calculate the % decomposition of I2(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kp at 1000 K is 0.254. The initial pressure of the reaction products is 0 atm. I2(g) = 2I(g) 
chemistry
a student needs to prepare an aqueous solution of sucrose at a temperature of 20 degrees c with a vapor pressure of 15. 0 mm Hg. How many grams of sucrose (mm=342 g/mol) does she need if she uses 375 g H20? (the vapor pressure of water at 20 degrees c is 17.5 mm Hg) 
chemistry
A gas mixture contains oxygen and argon at partial pressures of 0.60 atm and 425 mmhg. If nitrogen gas added to the sample increases the total pressure to 1250 torr, what is the partial pressure in torr? 
Chemistry
a 3.67L flask is filled with carbon monoxide at 27 degrees C until the pressure is 1.27 atm. Calculate the total pressure after 3.42 moles of carbon dioxide has been added to the flask. (R=0.082 Latm/K mol) 
fluid
3. A students boot pressure on the ground is 5 pounds per inch squared. how many inches squared will be required to set off a landmine with a set pressure 40 pounds? 4. Calculate the pressure exerted by the atmosphere on a cubic square can with 6 sides of dimensions of 10 x 10... 
Chemistry
The relative humidity of air is equal to the ratio of the partial pressure of water in the air to the equilibrium vapor pressure of water at the same temperature. If the relative humidity of the air is 30.% and its temperature is 23°C, how many molecules of water are present ... 
Chemistry,
I reall need help, i know what formulas to use i just don't know how to do it. Can some one please work with me to get to the correct answer? 1.The air in a dry, sealed 2L soda bottle has a pressure of 0.998 atm at sea level at a temperature of 34C. what will be it's pressure... 
maths &chemistry
Nitrogen tetraoxide is known to dissociate accoding to the equation;N2O4(g)_2NO2(g).A250mlsample of the gas mixture weighs 0.257bar.Calculate the partial pressure of each gas.(Hint:obtain the pressure it had before dissociation ,and then use the idea of equilibrium constant to... 
Physics  Tire Pressure
Why is the air (atmospheric) pressure of 14.7 lbs/in2 not included in the pressure gauge reading for a tire? 
PHYSICS
WHEN THE BAROMETRIC PRESSURE IS 14.9LBS\IN AND THE PRESSURE GAGE ON A TIRE READS 34.6LBS\IN WHAT IS THE ABSOLUTE PRESSURE INSIDE THE TIRE 
chemistry
A quantity of 0.020 mole of a gas initially at 0.050 L and 20 degrees Celsius undergoes a constanttemperature expansion until its volume is 0.59 L. Calculate the work done (in joules) by the the gas if it expands (b) pressure of 0.20 atm. (C) If gas in (b) is allowed to ... 
Chemistry
A quantity of 0.020 mole of a gas initially at 0.050 L and 20 degrees Celsius undergoes a constanttemperature expansion until its volume is 0.59 L. Calculate the work done (in joules) by the the gas if it expands (b) pressure of 0.20 atm. (C) If gas in (b) is allowed to ... 
chemistry
Acetylene(C2H2), an important fuel in welding, is produced in the laboratory when calcium carbide (CaC2) reacts with water: CaC2(s) + 2H20(l) → C2H2(g) + Ca(OH)2(aq) For a sample of acetylene collected over water, total gas pressure (adjusted to barometric pressure) is ... 
science
1. Name a Protist that has both plant and animal characteristics. 2. What compound is usually identified by the use of iodine? 3. What important gas is released during photosynthesis? 4. Contrast photosynthesis and respiration. 5. Is movement characteristic of plant or animal ... 
Chemistry
Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.5L of water upon warming from 25C to 50C . Assume that the water is initially saturated with nitrogen and oxygen gas at 25C and a total ...