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pressure

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Chemistry - Half-life
Phosphene decomposes to phosphorus and hydrogen in a first order mechanism. 4PH3(g) --> P4(g) + 6H2(g) This reaction's half-life is 35.0 s at 680 degrees C. If you had 520 mmHg of phosphene in an 8.00-L flask, how long does it take for the pressure in the flask to rise to ...

physics
Four acrobats of mass 61.0 kg, 68.0 kg, 62.0 kg, and 55.0 kg form a human tower, with each acrobat standing on the shoulders of another acrobat. The 61.0-kg acrobat is at the bottom of the tower. If the area of each of the 61.0-kg acrobat's shoes is 370 cm2, what average ...

thermodynamic
an engine operates on the carnot cycle between the temperature limits of 250c and 50c. the pressure and the volume at the start of the isothermal expansion are 6 bar and 0.1 m^3 respectively. pressure after isothermal expansion is 3 bar. assume gamma=1.4,R=0.287kj/kg.k ...

chem
ive tried the ice method but i keep on getting it wrong please help. If the initial pressure of NH3(g) is 3.168 atm, calculate the % decomposition of NH3(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kp at 427.0 °C is 12800.00. The...

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. Assuming the balloon can freely expand, calculate the volume of the ...

physics
A horizontal pipe 17.00 cm in diameter has a smooth reduction to a pipe 8.50 cm in diameter. If the pressure of the water in the larger pipe is 8.00 104 Pa and the pressure in the smaller pipe is 6.00 104 Pa, at what rate does water flow through the pipes? The velocity is the ...

chemistry
Exactly 1.0 L of hydrogen gas (H2) is collected over water at 292 K under a total pressure of 152 torr. If the vapour pressure of water is 16.5 torr at this temperature, what is the mole fraction of hydrogen in the gas sample? Volume of CO2 = L Mole

Chemistry
Find the pressure of a gas that originally had a volume of 25 L, pressure of 67kPa at a temperature of 100 Kelvin. When the gas was heated to 200 Kelvin, it had a volume of 56L. How many moles would be present if the gas in the above question was an ideal gas?

FLUID MECHANICS
Water flows at a rate of 0.040 m3/s in a 0.15 m diameter pipe that contains a sudden contraction section to a 0.06 m diameter pipe. Determine the pressure drop across the contraction section. Determine also the pressure difference due to the losses.

physic
If an erect person's systolic pressure is measured at 120 mm-Hg at the level of heart, please calculate the arterial systolic blood pressure in the head of this person (in the unit of mm-Hg). Assume that the head is 50 cm above the heart (the density of blood is 1050 kg/m^3), ...

science
The two tables below give the relative-risk of developing a stroke, in relation to blood pressure and body mass index. The data are based on a population of men from the USA. The values in the first table are given in comparison with the total population. The values in the ...

physics
Ok, so I know I already posted another really long question but we have not learned this yet and are expected to do homework on it. Please help me. An ideal monotonic gas is compressed at a constant pressure of 0.9 atm from 14 L to 3.5 L. Note: Atmospheric pressure is 1....

Chemistry
Benzene has a vapor pressure of 100.0 Torr at 26°C. A nonvolatile, nonelectrolyte compound was added to 0.309 mol benzene at 26°C and the vapor pressure of the benzene in the solution decreased to 60.0 Torr. What amount (in moles) of solute molecules were added to the benzene?

thermo
four hundred cubic centimeters of a gas at 740mm Hg absolute and 18 degree celcius a process until the pressure until the pressure becomes 760mm Hg absolute and the temperature o degree celcius. what is the final volume of the gas

finite math
Among 26-31 year old, 29% say they have written an editorial letter while under the influence of peer pressure. Suppose six 26-31 year old are selected at random. (a) that at least one has not written under the influence of peer pressure. (b) what is the probability of that at...

physic
Hi! I really need help on Part B only. (a) Calculate the absolute pressure at the bottom of a freshwater lake at a depth of 28.7 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 ...

chem
A very flexible helium-filled balloon is released from the ground into the air at 20degree C The initial volume of the balloon is 5.00L , and the pressure is 760mmHg. . The balloon ascends to an altitude of 20Km , where the pressure is 76.0mmHg and the temperature is 50degree ...

chem
A very flexible helium-filled balloon is released from the ground into the air at 20degree C The initial volume of the balloon is 5.00L , and the pressure is 760mmHg. . The balloon ascends to an altitude of 20Km , where the pressure is 76.0mmHg and the temperature is -50degree...

AP Cemistry
Calculate the heat that must be supplied to 10.5 g of Ne(g) at 0.15 atm to raise its temperature from 24◦C to 54◦C at constant pressure. Assume that neon behaves as an ideal gas. Answer in units of J. [So, I know that we would use q = mCDT at some point but because...

Physics--Pressure
a house at the bottom of a hill is fed by a full tank of water 5m deep and connected to the house by a pipe that is 110m long at an angle of 58 from the horizontal. a) determine the water gauge pressure at the house b) how high could the water shoot if it came vertically out ...

Chemistry
A 5.00-gram sample of glucose, C6H12O6, [molar mass = 180.] is dissolved 10.0 grams of water What is the molality of the glucose solution? Calculate the boiling(BP) and freezing points(FP) of this solution to the nearest 0.1 C°. The vapor pressure of pure water at 30ºC is 25...

chemistry
Mixtures of helium and oxygen are used in scuba diving tanks to help prevent ‘the bends’, a condition caused by nitrogen bubbles forming in the bloodstream. If 95 L of oxygen and 25 L of helium at STP are pumped into a scuba tank with a volume of 8.0 L, what is the partial...

chemistry
Hydrogen gas can produced by the reaction between metallic aluminum and aqueous hydrochloric acid 2Al+6HCl----2AlCl3+3H2 Hydrogen gas produced by this reaction is typically collected via water displacement, during which time the hydrogen gas becomes saturated with water vapor...

Science
At the distance of the earth from the sun the pressure exerted by sunlight is avout 10^-5 Pa How much force does this pressure exerted on 10m^2 array of solar cells on a satellite when the array is perpendicular to the direction of the sunlight? If the satellite has a mass of ...

Physics
At the distance of the earth from the sun the pressure exerted by sunlight is avout 10^-5 Pa How much force does this pressure exerted on 10m^2 array of solar cells on a satellite when the array is perpendicular to the direction of the sunlight? If the satellite has a mass of ...

chemistry
A 1.25g sample of dry ice is added to a 750ml flask containing nitrogen gas at a temperature of 25.0 C and a pressure of 725mmHg. The dry ice is allowed to sublime (convert from solid to gas) and the mixture is allowed to return to 25.0C. What is the total pressure in the flask?

chemistry
A 1.25g sample of dry ice is added to a 750ml flask containing nitrogen gas at a temperature of 25.0 C and a pressure of 725mmHg. The dry ice is allowed to sublime (convert from solid to gas) and the mixture is allowed to return to 25.0C. What is the total pressure in the flask?

Chemistry
A sample of chlorine gas at a pressure of 420 mm Hg and in a volume of 3.50L was heated from 18.0 degrees celsius to 45 degrees celsius after being transferred to a container of volume 2.35L. The pressure in this new container should be about? Would I use (p1)(v1) = (p2)(v2) ...

Sciene Degree
Pressure, P, is directly proportional to temperature,T, and P is 28 lb per square inch when T is 112 degress Kelvin. What is the pressure when the temperature is 124 degrees Kelvin? If required, round answer to three decimal places. _____lbs per square inch.

Physical Chemistry
At 25.0o C, the equilibrium 2 NOBr(g) ¡ê 2 NO(g) + Br2(g) is rapidly established. When 1.10 g of NOBr is placed in a 1.0 L vessel at 25.0o C, the equilibrium pressure is 0.355 bar. Calculate the equilibrium constant K. ( P¥è = 1 bar ) Angela. Read your post (as it posted) ...

chemistry
A reaction produced 55.7 mL of nitrogen gas, which was collected over water at 23oC. The measured barometric pressure was 742 torr. If the vapor pressure of water at 23oC is 21 torr, what was the mole fraction of N2 in the collected gas?

Chemistry
A bicycle tire is filled with air to a pressure of 610 kPa at a temperature of 19 oC. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58 oC. The volume of the tire increases by 4.0%. What is the new pressure in the bicycle tire?

CRC
A sample of ideal gas is in a sealed container. The pressure of the gas is 675torr , and the temperature is 28\, ^{\circ}C . If the temperature changes to 91\, ^{\circ}C with no change in volume or amount of gas, what is the new pressure, P_2, of the gas inside the container?

chemistry
at 17.9 degrees celsus ethyl ether has a vapor pressure of 400 torr. What is the mole fraction of ethly ether in a solution which has a vapor pressure of 380 torr, if the solute is non-volatile at 17.9 degrees celsus?

chemistry
Relationship between the pressure and volume of helium gas at a constant temperature of 298K. Volume was changed by moving a piston & following data was obtained: Vol (L) Pressure (atm) 5 10.229 10 4.749 15 3.198 20 2.381 30 1.665 50 0.98 75 0.655 100 0.47 1. what would be the...

Chemistry for Engineers
A gas is confined to a container with a massless piston at the top. (Part C figure) A massless wire is attached to the piston. When an external pressure of 2.00 atm is applied to the wire, the gas compresses from 4.90 to 2.45 L. When the external pressure is increased to 2.50 ...

Chemistry
Consider the following equilibrium: H2CO3 (aq) ↔ H2O (l) + CO2 (g) Which direction will the equilibrium shift (left or right) if we: Increase the pressure by decreasing the volume of the system: Increase the pressure by adding Argon to the system: Addition of NaOH (aq) ...

Chemistry
Help please? 1)A sample of propane gas occupies 625 cm3 at 20.0 °C and 750 torr. What is the final volume in cubic centimeters at -80.0 °C and 750 torr? 2)If oxygen gas is collected over water at 25 °C and 775 torr, what is the partial pressure of the O2? The vapor pressure...

chemistry
CaSiO3(s) +6 HF (g)-> CaF2(aq) + SiF4 (g) + 3 H2O(l) If a 65.6 g sample of CaSiO3 is reacted in an inert 83 L container at 25.5°C with HF at 1.00 atm pressure find the following. a. the mass of water, and CaF2 produced in the reaction and the mass of HF that remains. b. ...

chemistry
CaSiO3(s) +6 HF (g)-> CaF2(aq) + SiF4 (g) + 3 H2O(l) If a 65.6 g sample of CaSiO3 is reacted in an inert 83 L container at 25.5°C with HF at 1.00 atm pressure find the following. a. the mass of water, and CaF2 produced in the reaction and the mass of HF that remains. b. ...

Physics
Water at a pressure of 3.90 atm at street level flows into an office building at a speed of 0.45 m/s through a pipe 5.60 cm in diameter. The pipes taper down to 2.10 cm in diameter by the top floor, 26.0 m above. Calculate the water pressure in such a pipe on the top floor.

Chemistry
Given the following reaction: 3 H2(g) + N2(g) <- -> 2NH3(g) + heat If the following changes were to occur what direction shift will it have (left or right) And what will be the reason of the shift Changes/Stress on system: Adding NH3 Decreasing the pressure Adding heat ...

Chemistry
Given the following reaction: 3 H2(g) + N2(g) <- -> 2NH3(g) + heat If the following changes were to occur what direction shift will it have (left or right) And what will be the reason of the shift Changes/Stress on system: Adding NH3 Decreasing the pressure Adding heat ...

Chemistry- please check my work
Compute the vapor pressure of water above a solution formed by dissolving 25.00 grams of magnesium sulfate, MgSO4 (MM=120.3) in 95.00 grams of water at 338K. The vapor pressure of pure water at 338K is 188.0 torr. I took 95.00g H20 divided by 18.0g. which gave me moles for top...

Chemistry;HELP
1. What volume will a sample of hydrogen occupy at 128.0 oC if the gas occupies a volume of 2.23 dm3 at a temperature of 0.0 oC? Assume that the pressure remains constant. (remember to change to Kelvin). 2. If a gas occupies 1733 cm3 at 10.0 oC, at what temperature will it ...

physics
I recently did an experiment where I measured pressure at a few heights. The question I cam having trouble with is how to find the density of the air between the top and bottom. The difference in pressure from the top to bottom is 52.6 torr (692.5 to 745.1). The height of the ...

FSE 120
A compartment measures 3.5 meters by 5.5 meters and is 3 meters high. A fire raises the temperature from 68of to 1500 of. If the starting pressure was 1 atmosphere, what volume is present at the elevated temperature assuming the compartment has openings to reduce pressure? For...

chemistry
we believed that the molecules of a gas move around fairly rapidly, we can use this to explain all of the following EXCEPT why adding more gas increases the pressure. why most of the volume of the gas sample is taken up by the gas molecules. why the gas molecules do not settle...

physics
Many cultures around the world still use a simple weapon called a blowgun, a tube with a dart that fits tightly inside. A sharp breath into the end of the tube launches the dart. When exhaling forcefully, a healthy person can supply air at a gauge pressure of 6.0 kPa. What ...

physics
A bubble of gas, diameter 2 mm, is trapped in a container of liquid at normal atmospheric pressure (1 × 10^5 Pa) and a temperature of 25 °C. The container is opened on board an aircraft where the temperature is 22 °C and the surrounding pressure is 0.9 × 10^5 Pa. What...

chemistry
An ideal gas is allowed to expand isothermally from 2.00 L at 5.00 atm in two steps: a) against a constant external pressure of 3.00 atm, followed by b) against a constant external pressure of 2.00 atm. Calculate q and w. (101.33 J = 1 L atm)

physics
A rigid container holds hydrogen gas at a pressure of 3.0 atm and a temperature of 20 degrees Celsius. What will the pressure be if the temperature is lowered to -33 degrees Celsius? Please give your final answer in atm. Answer

chem
A sample of ideal gas is in a sealed container. The pressure of the gas is 615torr , and the temperature is 10 ∘ C . If the temperature changes to 56 ∘ C with no change in volume or amount of gas, what is the new pressure, P 2 , of the gas inside the container?

chem
In an equilibrium mixture of HCl, Cl2 and H2, the partial pressure of H2 is 4.2 mPa and that of Cl2 is 8.3 mPa. What is the partial pressure of HCl at 500 oK given that at that temperature Kp = 4.0 x 1018 for H2(g)+ Cl2(g)--> 2HCl(g)

Chemistry
A sealed container comtains 1.50 mol of nitrogen gas, 2.00 mol of oxygen gas and 3.50 mol of argon gas. If the total pressure is 900 kPa, what is the pressure of the nitrogen gas?

Physics (Please help!!!)
1) If a 10. m3 volume of air (acting as an ideal gas) is at a pressure of 760 mm and a temperature of 27 degrees Celsius is taken to a high altitude where the pressure is 400. mm Hg and a temperature of -23 degrees Celsius, what volume will it occupy? (Hint: remember the ...

physic
mars once may have had an ocean 0.50 km deep. the acceleration due to gravity on mars is 0.379g, and we shall assume (unrealistically) the consisted of fresh water. a)what would be the guage pressure(in Pa)at the bottem of this martian ocean? b)what is the guage pressure (in ...

CHEMISTRY
Dr BOB can you explain this to me. I am so struggling with this subject. during a typical breathing cycle the CO2 concentration in the expired air rises to a peak of 4.6% by volume. Calculate the partial pressure of the CO2 at this point, assuming 1 bar of pressure. what is ...

Physics
A cylindrical diving bell 4.0m tall, with an open bottom, is lowered to the bottom of a lake on a day when atmospheric pressure is 100 kPa. It is observed that water rises inside the bell to within 1.0m of the top. A)What is the pressure of the air trapped in the diving bell? ...

Intro to Physics
(a) An ideal gas occupies a volume of 3.0 cm3 at 20°C and atmospheric pressure. Determine the number of molecules of gas in the container. _____________molecules (b) If the pressure of the 3.0-cm3 volume is reduced to 2.4 × 10−11 Pa (an extremely good vacuum) while the...

Physics
The maximum pressure most organisms can survive is about 1000 times atmospheric pressure. Only small, simple organisms such as tadpoles and bacteria can survive such high pressures. What then is the maximum depth at which these organisms can live under the sea (assuming that ...

chemistry
Electrolysis of water produces hydrogen gas and oxygen gas, which can be collected over water: 2H2O(l) → 2H2(g) + O2(g) An electrolysis reaction at 735 mmHg pressure produced 25.00L of gas at 25°C; at which point, the vapor pressure of water is 23.76 torr. How many ...

science
Please help!! Methylamine has a vapor pressure of 344 torr at -25∘C and a boiling point of -6.4∘C . Find ΔHvap for methylamine. I know that ln(P1/P2)=(ΔHvap/R)(1/T2-1/T1) but it doesn't indicate whether the boiling point is the "normal boiling point". Am I on the right ...

Bule hora preparatory school
An ideal gas is sealed within a container at a tempreture of 17 degree celcies and a pressure of 101KPa. The container is heated until the tempreture of the gas reaches 100 degree celcies. A valve in the container is then opened to allow gas to escape until the pressure falls ...

chemistry
If the initial pressure of SO3(g) is 4.775 atm, calculate the % of SO3(g) left over after the reaction reaches equilibrium according to the balanced equation. The value of Kp at 1000 K is 24.40. The initial pressure of the reaction products is 0 atm. 2SO3(g) = 2SO2(g)+O2(g) ...

Chemistry
The question has been answered years ago but not how it is solved. I tried the combined gas law. Here is the question: A balloon originally had a volume of 4.39 L at 44 degrees celsius and a pressure of 729 torr. The balloon must be cooled ??? to reduce its volume to 3.78 L at...

science
Calculate the volume of solution that has a vapour pressure of 25.8 mbar and contains 200.3 g of galactose, C6H12O6, at a temperature of 22.0 °C. The vapour pressure of pure water at 22 °C is 26.40 mbar, the density of water is 1.00 g mL-1, and assume no change in volume ...

chem
A balloon filled with 22.3 mol helium has a volume of 500. L at 0.0°C and 1.00 atm pressure. The temperature of the balloon is increased to 38.0°C as it expands to a volume of 570. L, the pressure remaining constant. Calculate q, w, and E for the helium in the balloon. (The ...

chem
A balloon filled with 22.3 mol helium has a volume of 500. L at 0.0°C and 1.00 atm pressure. The temperature of the balloon is increased to 38.0°C as it expands to a volume of 570. L, the pressure remaining constant. Calculate q, w, and E for the helium in the balloon. (The ...

Chemistry
A compressed gas cylinder contains 1.00 103 g of argon gas. The pressure inside the cylinder is 2096 psi (pounds per square inch) at a temperature of 19°C. How much gas remains in the cylinder if the pressure is decreased to 656 psi at a temperature of 27°C?

chemistry 2
A certain laser uses a gas mixture consisting of 9.0 grams of Hydrogen chloride, 2.0 grams Hydrogen gas, and 165.0 grams of Neon. What pressure is exerted by the mixture in a 75.0 liter tank at 22 degree Celsius? Which gas has the smallest partial pressure?

Manometer
A manometer is used to measure the pressure of a gas in a container one side is connected to the container the other side is open to the atmosphere. A manometer contains water of density 1000kg/m^3 and the head is 250mm. Calculate the gauge pressure of the gas in a container.

chemistry
Sulfur dioxide ( SO2 ) is a gas that causes acid rain . At the disposal of the fumes found 24 L found in the SO2 gas pressure of 200 torr . If the pressure is changed to 500 torr at a constant temperature , what is the volume of SO2 gas now ?

chemistry
A scuba tank is filled to 2500 psi(170 atm) in a dive shop at room temp/(25 degrees C) then stored in the trunk of a car on a hot day. What will be the new pressure in the tank if the temp. in the trunk reaches 60 degrees C? Express that pressure in atmospheres, not psi.

Thermodynamics
In one of the boiler rooms in an Industrial Plant, the barometer reads 750 mm Hg. Determine the absolute pressures in Kpa of the following pressure measuring instrument readings: pressure gauges reads 46 psi and 76 in. Hg; and compound gauges registers 13 Kpa vacuum and 2.5 ...

Chemistry
Let's say that you are asked to design an airbag for a car. You know that the bag should be filled with gas with a pressure higher than atmospheric pressure, say 828 mmHg at a temperature of 22.0 C . THe bag has a volume of 45.51. What quantity of sodium azide should be used ...

chem
Determine the mass(w/w%) percent of CaCl2 given the following information. The vapor pressure of a CaCl2 solution is 81.6 mmHg at 50degrees C. The vapor pressure of pure water at this temp is 92.6mmHg. Assume that you have 1.00mol of water.[Raoult's Law: P(solution)=X(solvent)...

chemistry
The vapor pressure of benzene, C6H6, is 60.0 mm Hg at 13.5°C. The molar heat of vaporization of benzene is 30.8 kJ/mol and R = 8.31 10-3 kJ/mol·K. What is the vapor pressure of benzene at 70.0°C?

earth
#16 the inner core of the earth is solid because of increased__________ a> density and composition b> density and temperature c> temperature and pressure d> pressure and density

7th Grade Help
If the temperature increases in a sample of gas at constant volume, then its a. volume increases b. pressure decreases c. pressure increases d. volume decreases Plz help me, I don't know it.

E.I.S.J
An ideal gas is sealed within a container at a tempreture of 17 degree celcies and a pressure of 101KPa. The container is heated until the tempreture of the gas reaches 100 degree celcies. A valve in the container is then opened to allow gas to escape until the pressure falls ...

General Chemistry II
The equillibrium constant (Kp) for the interconversion of PCl5 and PCl3 is 0.0121: PCl5(g) --> PCl3(g) + Cl2(g) A vessel is charged with PCl5, giving a initial pressure of 0.123 atm. At equillibrium, the partial pressure of PCl3 is _____ atm.

Calculus 2
The pressure P of a gas is related to its volume V by the formula P=k/V where k is a constant. A quantity of gas with an initial volume of 1 cubic meter and a pressure of 2.5 newtons per square meter expands to a volume of 16 cubic meters. Find the work done by the gas.

science
water flows steadily through a horizontal pipe of non uniform cross section. if the pressure of water is 4*10^4 N/m^2 at a point where the velocity of flow is 2ms^-1 and cross section is 0.02 m^2 what is the pressure at a point where cross section reduces to 0.01m^2?

physics
An ideal gas at 18.5°C and a pressure of 1.54 105 Pa occupies a volume of 2.10 m3. (a) How many moles of gas are present? moles (b) If the volume is raised to 5.30 m3 and the temperature raised to 31.0°C, what will be the pressure of the gas? Pa I used the formula pv = nRT (...

chemistry
A compressed gas cylinder contains 1.00 103 g of argon gas. The pressure inside the cylinder is 2035 psi (pounds per square inch) at a temperature of 15°C. How much gas remains in the cylinder if the pressure is decreased to 610. psi at a temperature of 30.°C? Thanks for the...

chemistry
Sulfur dioxide ( SO2 ) is a gas that causes acid rain . At the disposal of the fumes found 24 L found in the SO2 gas pressure of 200 torr . If the pressure is changed to 500 torr at a constant temperature , the volume of SO2 gas berapakan now ?

Chemistry II (College)
How would I go about solving this problem? Can someone show me an equation that can be used? The decomposition of dimethyl ether at 504°C is a first-order reaction with a half-life of 27 min. (CH3)2O(g) CH4(g) + H2(g) + CO(g) What will be the total gas pressure after 2.18 h...

Chemistry II (College)
How would I go about solving this problem? Can someone show me an equation that can be used? The decomposition of dimethyl ether at 504°C is a first-order reaction with a half-life of 27 min. (CH3)2O(g) CH4(g) + H2(g) + CO(g) What will be the total gas pressure after 2.18 h...

physics
A U-shaped tube contains a fluid of density 1.5x10^3 kg/m^3. the right side of the tube is closed, with vacuum above the fluid. The left side of the tube is open to the atmosphere. Assume the atmospheric pressure outside the tube is exactly 10^5 Pa. a) How much higher will the...

chemistry
ok heres my question, nitrogylcerin decomposes: 4c3h4(no5)3 --->12co2(g) +10h20(g)+6n2(g)+02(g) whats is the max pressure that a 10.0L container will be able to withstand if 5.00 Nitroglycerin decomposes at temp of 1250c mm of nitroglycerin =227 g/m i got 2.00atm b) what ...

Chemistry
I havent been at school for 8 days due to somthing wrong with my heart, but the teachers gave me work. I have no clue how to do them. I really need help please, There all due tomarrow. The air in a dry, sealed 2L soda bottle has a pressure of 0.998 atm at sea level at a ...

Chemistry
What is the mole fraction of benzene C6H6 in the VAPOR PHASE from a solution consisting of a mixture of benzene and n-hexame ch3(ch2)4ch3 at 27celsius, if the total pressure above the solution is 135.2 torr? The vapor pressures of benzene and n-hexame at 27 celsius are 103 and...

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
how to find the pressure exerted by the hydrogen alone? and the volume of dry hydrogen at SATP? i have room temperature=23C room pressure =101.62kPa volume of h2 gas & H2O vapour collected =43.2ml temperature of water = 23C length of Mg ribbon = 3.00cm

Chemistry II
Under water where the temperature is 17C and the pressure is 394 kPa, a diver inhales 2.1 L of air from his SCUBA tank. a.How many moles of gas are in his lungs? b.If the diver swims to the surface without exhaling where the temperature is 32C and the pressure changes to 100.2...

Chemistry
A piece of Na metal undergoes a complete reaction with H2O (l0 to produce sodium hydroxide and hydrogen. If 24.0 g of Na in a 3.50 L container is reacted with an excess amount of water at 25 degrees Celsius, calculate the total pressure (in atm) in the 3.50 L container when ...

physics
A horizontal pipe 17.00 cm in diameter has a smooth reduction to a pipe 8.50 cm in diameter. If the pressure of the water in the larger pipe is 8.00 104 Pa and the pressure in the smaller pipe is 6.00 104 Pa, at what rate does water flow through the pipes?

chemistry
A sample of neon gas used in a neon sign occupies a volume of 3.90 L at a pressure of 580 torr. Calculate the volume of the gas if the pressure in the glass tube of the sign is 783 torr.

Chemistry Help!!!!!!!!!!!!!!
1)The equipment you would use for carrying out a simple distillation at reduced pressure (i.e. under vacuum) 2)What could be the advantage of carrying out a distillation under vacuum as compared to atmospheric pressure?

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