osmotic pressure chemistry
64,382 results, page 9

chemistry
the volume of a gas is 250 mL at 350 kPa pressure. what will the volume be when the pressure is reduced to 50 kPa, assuming the temperature remains constant? 
chemistry
80g of NaCl are dissolved in 400g H2O. if the vapor pressure of the water is 40 mmHg , what is the vapor pressure of NaCl above the solution? 
Chemistry
When a sample of neon with a volume of 683 mL and a pressure of 0.792 atm was heated from 19.0 to 76.0 °C, its volume became 733 mL. What was its final pressure (in atm)? 
Chemistry
Calculate the normal boiling point of a compound that has a vapor pressure of 19.30kPa at 167 Fahrenheit and a vapor pressure of 1.86kPa at 77 Fahrenheit. 
chemistry
Consider the reaction 2 NO2 (g) ⇌ 2 NO (g) + O2 (g). If the initial partial pressure of NO2 (g) is 3.0 bar, and x is the equilibrium pressure of O2 (g), what is the correct equilibrium relation? 
Chemistry
A sample of nitrogen is collected over water at 21 degrees Celsius at a pressure of 745 torr. What is the partial pressure, in torr, of the nitrogen? 
chemistry urgent
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  DrBob222, Tuesday, November 30, 2010 at 1:25pm (P1/T1) = (P2/T2) Dear Dr Bob: is this a right ... 
vapor pressure
The total pressure in a flask containing air and ethanol at 25.7C is 878 mm Hg. The pressure of the air in the flask at 25.7C is 762 mm Hg. If the flask is immersed in a water bath at 45.0C , the total pressure is 980 mm Hg. The vapor pressure of ethanol at the new temperature... 
Chemistry
At a total atmospheric pressure of 1.00 atm, the partial pressure of CO2 in air is approximately 4.0×10−4 atm. If at 20 ∘C and a partial pressure of 760 mmHg, the solubility of CO2 in water is 0.169 g/100mL, what is the solubility of CO2 in an open bottle of ... 
CHEMISTRY
For the reaction I2 + Br2 <> 2IBr Kc=280 at 150C . Suppose that 0.500 mol IBr in a 2.00L flask is allowed to reach equilibrium at 150C . What is the equilibrium partial pressure of IBr? What is the equilibrium partial pressure of I2? What is the equilibrium partial ... 
Chemistry PLS HELP!!!
A student collects oxygen gas by water displacement at a temperature of 17 Celsius. A barometer reads 92.3 kPa. What is the pressure of the water vapor? Look it up on a water vapor pressure chart. What is the pressure of the oxygen gas? (Answer: ~14.0 mmHg for water, 678.3 ... 
chemistry
It decreases? If the air pressure increased, wouldn't that make the diver go down? What happens when you press on the pressure cap? Oh, yeah. So, at night the atmospheric pressure increases and therefore the diver sinks? Can someone help me with this question about a Cartesian... 
chemistry
A weather balloon is inflated to a volume of 27.0 at a pressure of 730 and a temperature of 31.3. The balloon rises in the atmosphere to an altitude, where the pressure is 365 and the temperature is 14.6. use as a ideal gas behavior 
chemistry
A gas sample occupying a volume of 88.7 mL at a pressure of O.917 atm is allowed to expand at constant temperature until its pressure reaches 0.335 atm. what is its final volume? 
Chemistry
A gas sample is connected to a closedend manometer. The difference in mercury levels in the 2 arms is 115 mm. What is the gas pressure in torr if the atmospheric pressure is 750. torr? 
chemistry
A gas sample is connected to an openend manometer. The mercury level is 25 mm lower in the side open to the atmosphere, and the atmospheric pressure is 754 torr. What is the pressure of the gas? 
Chemistry 105
A heliox deepsea diving mixture contains 2.0 g of oxygen to every 98.0 g of helium. What is the partial pressure of oxygen when this mixture is delivered at a total pressure of 9.3 atm? 
chemistry
A 300 mL sample of hydrogen gas is at a pressure of 0.500 kPa. If the pressure increases to 0.750 kPa, what will be the final volume of the sample? Assume that the temperature stays constant 
chemistry
A 300 mL sample of hydrogen gas is at a pressure of 0.500 kPa. If the pressure increases to 0.750 kPa, what will be the final volume of the sample? Assume that the temperature stays constant 
chemistry
A scuba diver takes a 2.3L balloon from the surface, where the pressure is 1.0atm and the temperature is 37degrees C, to a depth of 35m, where the pressure is 4.5atm and the temperature is 18degrees C.what is the final volume at this depth? 
Chemistry
At T = 25 degrees Celsius, the reaction No2 <> 2NO +O2 has an equilibrium constant K=5.0*10^13. Suppose the container is filled with NO2 at an initial pressure of 0.25 atm. Calculate the partial pressure of NO at equilibrium 
Chemistry
At T = 25 degrees Celsius, the reaction No2 <> 2NO +O2 has an equilibrium constant K=5.0*10^13. Suppose the container is filled with NO2 at an initial pressure of 0.25 atm. Calculate the partial pressure of NO at equilibrium 
Chemistry
A gas occupying a volume of 664 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume? 
Chemistry
A gas occupying a volume of 664 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume? 
Chemistry
A sample of oxygen gas at 295 kPa takes up 456 L of space at standard temperature (the “T” in STP). What is the new volume when the pressure is lowered to standard pressure (the “P” in STP)? 
chemistry
At a certain temperature, the Kp for the decomposition of H2S is 0.734.Initially, only H2S is present at a pressure of 0.102 atm in a closed container. What is the total pressure in the container at equilibrium? 
Chemistry
Determine the vapor pressure (in atm) of water in an aqueous solution of 12% by mass ethylene group (antifreeze) if the vapor pressure of pure water at that temperature is 0.095 atmospheres. 
chemistry
SO2 and O2 are placed in a 2.00 L container at a temperature of 786 °C and a pressure of 6.99 atm. During the reaction, SO3 forms and the pressure falls to 1.89 atm. Determine how many moles of SO3 are generated. 
CHEMISTRY
ok i have no idea what a 7 letter word for : force resulting from the collisions of gas particles is... so if u have any ideas to what it could be would be great. thanks kinetic? idk pressure is a force.... pressure is a eight letter word I think someone miscounted the letters... 
Chemistry!
Liquid A has vapor pressure X, and liquid B has vapor pressure Y. What is the mole fraction of the liquid mixture if the vapor above the solution is 30% A by moles? 50% A? 80% A? (calculate in terms of x and y) I'm a little bit confused because I thought the mole fraction of ... 
chemistry
A sample of argon has a volume of 735 mL at a pressure of 1.20 atm and a temperature of 385 K. What is the volume of the gas in milliliters when the pressure and temperature of the gas sample are changed to 15.4 atm and 2580C? This problem involves changes in pressure, ... 
Chemistry
A tank holds equal amounts of 4 different gases (H2, He, O2, N2) at a pressure of 896 mm Hg. The tank contains 2.00 L. What is the individual pressure of each of these 4 gases? 
chemistry
A 10g mass of krypton occupies 15.0 L at a pressure of 210 kPa. Find the volume of the krypton when the pressure is increased to 790 kPa. 
chemistry
when there is 3.0 x 10^20 molecules in a closed container, the pressure is 1.2 atm. Using a pumper 1.5 x 10^20 more molecules are added to the container. what is the new pressure? 
Chemistry
A 10 gram of mass of krypton occupies 15.0 L at a pressure of 210 kPa. What is the volume of the krypton when the pressure is increased to 790 kPa? 
chemistry
what is the partial pressure of 02 collected over water at 25 degree C and 630 torr (vapor pressure of H20 at 25 degree C is 23.8 torr) 
chemistry
The vapor pressure of pure water at 25 degrees Celsius is 23.77 mm Hg. What is the vapor pressure, in mm Hg, of water above a solution that is 1.5m glucose, C6H12O6? 
Chemistry
A gas mixture contains 4.00 grams of O2 and 4.00 grams of He. If the total pressure of the gas sample is 4.67 atm, what is the partial pressure of each component? 
chemistry
A gas sample with a volume of 5.3L has a pressure of 745mmHg at 33degrees C.What is the pressure of the sample if the volume remains at 5.3L but the temperature rises to 79degres C? 
chemistry
a gas has a volume of 95 mL at a pressure of 930 torr. What volume will the gas occupy at standard temperature if pressure is held constant? 
chemistry
A gas mixture contains 75.2% nitrogen and 24.8% krypton by mass. What is the partial pressure of krypton in the mixture if the total pressure is 853mmHg ? 
chemistry
A sample of gas has an initial volume of 20.9 L at a pressure of 1.4 atm If the sample is compressed to a volume of 12.9 L: , what will its pressure be? (Assume constant temperature.) Thank you 
Chemistry
A 30.9 L cylinder containing C2H4F2 at a pressure of 114.0 torr is connected by a valve to 0.865 L cylinder containing C4H10 at 114.0 torr pressure. Calculate the partial pressure (atm) of C4H10 when the valve is opened. 
Chemistry
A 30.9 L cylinder containing C2H4F2 at a pressure of 114.0 torr is connected by a valve to 0.865 L cylinder containing C4H10 at 114.0 torr pressure. Calculate the partial pressure (atm) of C4H10 when the valve is opened. 
Chemistry
A deepsea diver uses a gas cylinder with a volume of 13.0 L and a content of 50.1 g of O2 and 33.4 g of He. Calculate the partial pressure of each gas and the total pressure if the temperature of the gas is 22°C. I got PO= 5.82, PHe=15.5 and Ptotal=21.4 but it says that PO ... 
chemistry
Question 16 options: A mixture of equal moles of He and Xe are in a plastic container at 25ºC and 874 mm pressure. If only He leaks from the container and the pressure decreases to 600 mm at 25º C, what is the mole fraction of (1) He and (2) Xe in the container after the leak? 
chemistry
A bag of potato chips contains 585 mL of air at 25°C and a pressure of 765 mm Hg. Assuming the bag does not break, what will be its volume at the top of a mountain where the pressure is 448 mm Hg and the temperature is 6.0°C? I set it up like p1v1/t1= p2v2/t2 and got 940ml ... 
chemistry
A 250 L vessel is evacuated and then connected to a 50.0 L bulb with compressed nitrogen. The pressure in the combined containers is 1672 mm Hg. If the temperature remained at 20 °C throughout the process, what was the initial pressure in the 50.0 L bulb? Can someone please ... 
Chemistry
15.8 grams of potassium chlorate is decompossed and the gas is colected over water at 29 degrees celcius when water vapor pressure is 30 mmHg. Assuming 100% yeild of products, what is the total pressure in the vessel after the reaction in complete? 
Physics
Continuously running exhaust hoods in a university chemistry building keep the inside air pressure slightly lower than outside. A student notices that a 175 N force is necessary to start opening a 1.2 m by 2.3 m door. The door is hinged on one of its 2.3 m vertical sides, and ... 
Chemistry
A sample of helium gas has a volume of 900. milliliters and a pressure of 2.50 atm at 298 K. what is the new pressure when the temperature is changed to 336K and the Volume is decreased to 450. milliliters? a 0.177 b 14.1 c 5.64 d 4.43 
Chemistry
A sample of helium gas has a volume of 900. milliliters and a pressure of 2.50 atm at 298 K. what is the new pressure when the temperature is changed to 336K and the Volume is decreased to 450. milliliters? a 0.177 b 14.1 c 5.64 d 4.43 
Chemistry
The mass percent of a three component gas sample is 95.2% PF5, 1.40% C2H2 and 3.40% C3H6. Calculate the partial pressure (atm) of PF5 if the total pressure of the sample is 570.0 torr. 
Chemistry
A quantity of gas under a pressure of 302 kPa has a volume of 600. cm3. The pressure is increased to 545 kPa, while the temperature is kept constant. What is the new volume? 
Chemistry
A quantity of gas under a pressure of 302 kPa has a volume of 600. cm3. The pressure is increased to 545 kPa, while the temperature is kept constant. What is the new volume? 
Chemistry
How would you prepare 500.0 of an aqueous solution of glycerol with a vapor pressure of 24.8mm Hg at 26 degree Celsius (vapor pressure of pure water=25.21mm Hg)? assume the density of the solution to be 1.00 g/mL. 
Chemistry
At a temperature of 57oC, a gas inside a 5.30 L metal canister has a pressure of 4000 torr. If the temperature is decreased to 13oC (at constant volume), what is the new pressure of the gas? I know you use the formula (P1/T1) = (P2/T2) 
chemistry
3 moles of an ideal gas initially at a pressure of 1 atm and a temprature of 100°C are expanded to twice the initial volume and then heated to 200°C at the new volume.What is the final pressure in atm? 
chemistry
a scuba driver is using eanx32, an enhanced nitrox gas mixture. this mixture contains 32% oxygen with 68% nitrogen. if the cylinder is at a pressure of 250 kpa, what is the partial pressure of oxygen? 
chemistry
A bag of potato chips contains 575mL of air at 25.0∘C and a pressure of 765mmHg . Assuming the bag does not break, what will be its volume at the top of a mountain where the pressure is 458mmHg and the temperature is 10.0∘C? 
chemistry
A balloon is filled to 1.000L at the bottom of the Marianas Trench, where the pressure exerted on it is 1065 atm and the temperature is 2°C, and taken to Columbus, where the pressure is 0.967 atm and the temperature is 30.00°C. What is its new volume? 
chemistry
a weather balloon is filled with helium to a volume of 250 l at sea level, where pressure is 760 mm hg. assuming constant temperature, what will be the volume when the balloon raises to a height of 25 km, where the pressure is only 10 mm hg 
Chemistry plz helppp!!!
Why for the ionization of gas,lower pressure is more favoured than high as in the discharge tube? High pressure means more particles to be ionized then what is the reason behind this? 
Chemistry
A car tyre has a volume of 10 L when inflated. The tyre is inflated to a pressure of 3 atm at 17°C with air. Due to driving, the temperature of the tyre increases to 47°C. a) what would be the pressure at this temperature? b) how many litres of air measured at 47°C and ... 
chemistry
An ideal solution of 5.00 mole benzene and 3.25 mole toluene. At 298 K, the vapor pressure of the pure benzene and toluene were 96. Torr, and 28.9 Torr, respectively. At what pressure does the vapor phase appear first, if the pressure above this solution is reduced from 760 Torr. 
data management gr.12
Tests show that the pressure, in pounds per square inch (Psi) required to break skate boards is normally distributed with a mean of 54.7 and standard deviation of 6.2 a)what is the probability that a board will require at least a pressure of 70 to break? b)64% of skateboards ... 
Chemistry
Sulfur trioxide gas, one of the causes of acid rain, is produced in the upper atmosphere when oxygen reacts with sulfur dioxide gas in the reaction shown below: 2SO2(g) + O2(g) <> 2SO3(g) deltaH0 = 197kJ The gases are placed in a reaction vessel and allowed to come to... 
Chemistry
We're doing gas problems in chemsitry. I have no idea where to even begin on this problem: Air is 20% oxygen and 80% nitrogen. What is the mass of air in an automobile tire of 19.7 L and internal pressure of 46.7 PSI at 24 degrees celsius? (That pressure is the same as the 32 ... 
Chemistry
A 7.65 g sample of potassium chlorate,KClO3, was heated to decompose all the oxygen. It was found that 2.25 L of oxygen was collected over water at 25.00degreesC and 1.00 atm of pressure. The vapor pressure of water at that temperature is 23.8 mm Hg. How many moles of oxygen ... 
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 (A), 38 C? 
Chemistry
A balloon originally had a volume of 6.63 L at 86 °C and a pressure of 684 torr. The balloon must be cooled to __________°C to reduce its volume to 6.03 L (at constant pressure). Express answer to the tenth decimal place 
AP Chemistry
Each increase in pressure of 100 atm decreases the melting point of water by 1.0 degrees C. Estimate the temperature at which liquid water freezes under a pressure of 400 atm. How do I approach this problem? 
chemistry
Two moles of an ideal gas initially at 27C and 1 atm pressure are compressed isothermally and reversibly till the final pressure of the gas is 10 atm. Calculate the work done. (R=8.314 JK1mol1) 
chemistry
The pressure inside a hydrogenfilled container was 2.10 atm at 21 C . What would the pressure be if the container was heated to 86 C? Pfinal = ?? atm 
Chemistry
A rigid container of O2 has a pressure of 3.5 atm at a temperature of 713 K. What temperature would be needed to achieve a pressure of 6.0 atm? 
Chemistry
A gas sample has an initial volume of 4.5 liters at a pressure of 731 mmHg. If the volume is increased to 8.9 liters, what is the pressure? 
Chemistry
The pressure of a gas is 35 atmospheres at a temperature of 48 (degrees) C with constant volume. What will the new pressure be if the temperature is increased to 36 (degrees) C? 
chemistry
A gas with a volume of 4.20 L at a pressure of 0.63 atm is allowed to expand until the volume raises to 95 L. What is the new pressure (in atm)? 
chemistry
A gas with a volume of 4.20 L at a pressure of 0.63 atm is allowed to expand until the volume raises to 95 L. What is the new pressure (in atm)? 
chemistry
A gas with a volume of 6.65 L at a pressure of 1.22 atm is allowed to expand until the volume raises to 54 L. What is the new pressure (in atm)? 
Chemistry
What is the pressure (in mmHg) of the gas inside the apparatus below if the atmospheric pressure is Patm=748 mmHg, h1=40 mmHg, and h2=67 mmHg? 
Chemistry
What is the pressure (in mmHg) of the gas inside the apparatus below if the atmospheric pressure is Patm=748 mmHg, h1=40 mmHg, and h2=67 mmHg? 
Chemistry
Nitric oxide (NO) reacts with molecular oxygen as follows: 2NO(g) + O2(g) ¨ 2NO2(g) Initially NO and O2 are separated as shown below. When the valve is opened, the reaction quickly goes to completion. Determine what gases remain at the end of the reaction and calculate ... 
DEsperate to undertsandChemistry
The pressure of gas is measured at 550 mm Hg. Calculate the pressure in a. Torr b. lb/in2 c. atm d. in Hg How do I set up these conversions to get the [prper calcu;ations...step by step? This is the 3rd time zzzzzzzIve posted this question and I need to know how to get the ... 
chemistry
You have a metal tank containing 74.0 moles of nitrogen gas at a pressure of 15.0 atm. If the pressure is measured at a temperature of 25.0 °C, then the volume of the tank must be ___ liters. (Round your answer to one decimal place and do not include units with the number.) 
Chemistry
Two gases are mixed in a 10.0L fixed volume flask: 8.0 L of O2 at 2.00 atm and 2.0 L of N2 at 3.00 atm. A) Calculate the partial pressure for each gas and the total pressure. I got ... PO2 = 1.60 atm PN2= 0.600 atm B) How much (volume in liters) argon at 5.0 atm must be added ... 
Chemistry
Two gases are mixed in a 10.0L fixed volume flask: 8.0 L of O2 at 2.00 atm and 2.0 L of N2 at 3.00 atm. A) Calculate the partial pressure for each gas and the total pressure. I got ... PO2 = 1.60 atm PN2= 0.600 atm B) How much (volume in liters) argon at 5.0 atm must be added ... 
science  chemistry
Some heat is supplied to a mixture of ice and liquid water in a closed container and the contents of the container are thoroughly mixed. If, after the addition of heat, both ice and liquid water remain: A) the temperature of the system will increase B) the vapor pressure will ... 
chemistry
Glycerin (C3H8O3) is a nonvolatile liquid. What is the vapor pressure of a solution made by adding 180. g of glycerin to 321 mL of H2O at 39.8°C? The vapor pressure of pure water at 39.8°C is 54.74 torr and its density is 0.992 g/cm3. 
chemistry
What is the effect of the following on the separation of the mixture(hexane and toluene)? a. A soluble, nonvolatile impurity b. a decrease in barometric pressure c. an increase in barometric pressure d. rapid heating rate separation technique is distillation 
chemistry
Glycerin, C3H8O3, is a nonvolatile liquid. What is the vapor pressure of a solution made by adding 164 g of glycerin to 325 mL of H2O at 39.8°C? The vapor pressure of pure water at 39.8°C is 54.74 torr and its density is 0.992 g/cm3. 
Gem=neral Chemistry 106
A gas occupying a volume of 806 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume? 
chemistry
A 10.0 g sample of carbon monoxide, a poisonous gas produced by the incomplete combustion of hyrdocarbons, occupies 15.0 l at a pressure of 200 kpa. the volume occupied by the carbon monoxide when the pressure is increased is 700 pka is a) 1.16 L b)4.05 L c)4.29 L d)52.5 L 
chemistry
A 10.0 g sample of carbon monoxide, a poisonous gas produced by the incomplete combustion of hyrdocarbons, occupies 15.0 l at a pressure of 200 kpa. the volume occupied by the carbon monoxide when the pressure is increased is 700 pka is a) 1.16 L b)4.05 L c)4.29 L d)52.5 L 
Chemistry
The oxygen gas emitted from an aquatic plant during photosynthesis is collected over water at a temperature of 25 degrees Celcius and a total pressure of 752 torr. What is the partial pressure of the oxygen gas? 
College Chemistry
A sample of octane in equilibrium with its vapor in a closed 1.0 L container has a vapor pressure of 50 torr at 45oC. The container’s volume is increased to 2.0 L at constant temperature and equilibrium is reestablished. What is the vapor pressure? The answer I got was 25 ... 
Organic chemistry plz help me out (thanks)
1) a) What is the normail boiling point (760 mm Hg) for a compound that boils at 150 degree celsius at 10 mm Hg pressure? b) At which temperature would the compund in (a) boil if the pressure were 40 mm Hg? c) A compound was distilled at atmospheric pressure and had a boiling ... 
chemistry
The vapor pressure of water at 80 degrees c is 355mmHg. A 100cm3 vessel contained wateraturated oxygen at 80 degrees c., the total gas pressure being 760 mmHg. The contents of the vessel were transferred by pumping to a 50cm3 vessel at the same temperature. What were the ... 
science
1. What will happen to the pressure in your tires if the temperature drops 40 degrees over the night? a) Pressure will increase b) Pressure will decrease c) Pressure will not change d) Cannot determine 2. Explain, on a molecular level, why this happens. these questions are ... 
chemistry
a 500ml sample of o2 gas at 24 degrees celsius was prepared by decomposing a 3% aqueous solution of hydrogen peroxide, in this presence of a small amount of manganese catalyst by the reaction 2H2O2>2H2O+O2. The oxygen thus prepared was collected by displacement of water. ...