osmotic pressure chemistry

63,268 results, page 21

Chemistry

Is barometric pressure of 765.7 mmHg is equivalent to 1.008 atm? I'm confused.

chemistry

What is the density (in g/L) of hydrogen gas at 23.0 degrees Celsius and a pressure of 1670 psi?

chemistry

what is the pressure exerted by a 0.500 mol sample of nitrogen in a 10.0 L container at 20 degrees C?

Chemistry

Which of the following has the highest vapor pressure? CCl4 CBr4 CH3CH3 CH3CHBr2

Organic Chemistry Lab

They are asking me to predict the boiling point at pressure of 30 torr. How would I do that? Thanks :D

chemistry

How many moles of oxygen gas (O2) are in 448L at STP (273K and 1 atm of pressure)?

chemistry

calculate the pressure,in atmospheres, of 2.00 mol helium gas in a 10.0-L container at 27 celcius?

chemistry

calculate the pressure,in atmospheres, of 2.00 mol helium gas in a 10.0-L container at 27 celcius?

Chemistry

Why is the expansion of air into a region of low pressure an endothermic proccess?

chemistry

a 25.0 sample of nitrogen has a volume of 50.0L and a pressure of 630. mmHg. what is the temperature of the gas?

chemistry

What is the volume of 3.5 moles of oxygen gas (O2) at standard temperature and pressure (STP)

chemistry

What is the volume of 3.5 moles of oxygen gas (O2) at standard temperature and pressure (STP)? 6.4 L 22.4 L 32.0 L 78.4 L

chemistry

2P(s) + 3Cl2(g) --> 4PCl3(l) What is the vapor pressure of PCl3 at 298K? Show Calculations.

chemistry

which solution would have a high vapor pressure 6.0 M NaCl or 3.0 M LiCl?

chemistry

which solution would have a high vapor pressure 6.0 M NaCl or 3.0 M LiCl?

chemistry

Determine the pressure when it expands to 10 liters, from a 5 liter ballon at 1 atm and 150k.

Chemistry

What is the pressure exerted by a .500 mol sample of nitrogen in a 10.0L container at 20C?

Chemistry

Is it possible to calculate heat of vaporization if i only have pressure and temperature.

Chemistry

What volume will 12.0 grams fo neon gas occupy at 25 degress C. and a pressure of 0.520atm?

chemistry

if a sample of NO2 gas has 4.5ml. what is the cooled constant pressure from 45 to 5 degrees?

Chemistry

At constant pressure, which of these systems do work on the surroundings? Check all that apply. 2A (g) + B(s) --> 3C(g) 2A (g) +2B (g) -->5C(g) A(g)+ B(g) --> C(g) A (s) +2B(g)--> C(g)

chemistry

what is the vapour pressure in mm of Hg of nickel nitrate solution at 125 degree centigrade

Chemistry

At constant pressure, which of these systems do work on the surroundings? Check all that apply. A(s) + 2B(g) ---> C(g) 2A(g) + B(g) ---> 4C(g) A(g) + 2B(g) ---> 2C(g) A(s) + B(s) ---> C(g)

Chemistry

What is the volume occupied by 12.3 g or argon gas at a pressure of 1.17 atm and a temperature of 455K?

chemistry

What volume will 12.0 g of oxygen gas occupy at 25 degrees celcius and a pressure of 52.7 kPa?

chemistry

At what temperature does 14.2 g of nitrogen gas have a pressure of 3.25 atm in a 14.0 liter tank?

chemistry

How many moles of a gas will occupy a volume of 0.53 L at a temperature of 343 K and a pressure of 2.6 atm ?

Chemistry

How many moles of Xe gas are there in a container of Xe with a volume of 1.5L, and a pressure of 1.25 atm, and a temperature of 150C?

chemistry

calculate the volume occupied by 10^22moleculesof a gas 300k and 760mm pressure

chemistry

Determine the mass of CO2 gas that has a volume of 7.10 L at a pressure of 1.11 atm and a temperature of 31.0°C.

chemistry

How will an increase in pressure influence the amount of SO2(g) present at equilibrium?explain.

Chemistry

calculate q , w , and ∆ E for melting 1.00 mol of ice at 0 ◦ C and 1.00 atm pressure

Chemistry

How would you define pressure in the unit of thermodynamics? Is it just a force basically?

Chemistry

A 630. mL flask contains O2 at a pressure of 0.75 atm and a temperature of 20°C. What mass of O2 is present?

Chemistry

A balloon contains 0.350 mol of Ar at 5.00°C and 68.0 kPa pressure. What is the volume of the gas?

chemistry

Calculate the pressure, in atmospheres, of 0.0495 mol of a gas in a 0.379 L flask at 23. oC.

Chemistry

What is the temperature of 0.65mol {\rm mol} of gas at a pressure of 1.5atm {\rm atm} and a volume of 12.6L {\rm L} ?

chemistry

A mixture of 94.6g of O2 and 82.2g of Ne is placed in a 200.0L container at 250K . What is the partial pressure of O2 in atmospheres?

chemistry

What is the pressure of 5 pounds of Argon gas in a 25 liter bottle at 23 degrees Celsius?

Chemistry

A gas occupies 21.0 L at 2.00 atm pressure and 27oC. Calculate its volume at STP.

Chemistry

What pressure is required to reduce 34 mL of a gas at standard conditions to 16 mL at a temperature of 20◦C

chemistry

What is the volume occupied by 20.9g of argon gas at a pressure of 1.09atm and a temperature of 411K ?

Chemistry

What is the volume occupied by 12.9 g of argon gas at a pressure of 1.30 atm and a temperature of 318 K ?

Chemistry

100mls of propane gas in grams. Pressure is equal to one atmosphere

chemistry

Calculate the volume occupied by 7g of nitrogen gas at 27 degree c and 750 mm of hg pressure

Chemistry

What is the pressure of 1.78 g of nitrogen gas confined to a volume of .118 L and 25 degrees Celsius?

Chemistry

Why do carbonated beverages go "flat" when opened and left and room temperature and pressure?

Chemistry

What volume will 11.2 grams of H2 gas occupy at 25.1oC and a pressure of 758 mmHg?

Chemistry

Calculate the pressure of an ideal gas if you have 4.3 L and 2.2 miles at a temperature of 238 K

Chemistry

Calculate % of lowering of vapour pressure if 36 g glucose is added in 312g of benzene

CHEMISTRY

What pressure would be required to form a 0.045 M solution of helium (kH = 3.7 x 10-4 M/atm) at 25 °C????

science (physics)

1) Why is frequency an element needed in the sound industry? and 2) When there is a sound pressure level of two different sources with different frequencies, why do sound pressure levels have to be determined in each separate frequency? 1) The sound industry sells equipment ...

Chemistry

A cylinder containing 15.0 L of helium gas at a pressure of 165 atm is to be used to fill party balloons. Each balloon must be filled to a volume of 2.0 L at a pressure of 1.1 atm. What is the maximum number of balloons that can be inflated? Assume that the gas in the cylinder...

BIOLOGY

Heat exhaustion caused by a person's exposure to heat can result in weakness or collapse. It usually involves a decrease in blood pressure. Explain why the homeostasis adjustment to heat can cause a drop in blood pressure. ---------- I'm not sure if I'm correct. but is it ...

Chemistry

This is a question on Non-standard states. Calculate ¥ÄG605 for the following reaction under the given conditions. Use data obtained from the table below and assume that ¥ÄHo and ¥ÄSo do not vary with temperature. C2H4(g) + H2O(g) ¡æ C2H5OH(g) The ¥ÄHo and ¥ÄSo ...

chemistry

According to Boyle, pressure and volume of a confined gas are ____ proportional, and according to Charles, the volume of a gas at a constant pressure is____ proportional to its Kelvin temperature. A. directly; inversely B. directly; not C. inversely; directly D. not; inversely

science

When the metal sample reacts with acid, the gas evolved will be collected over water; the gas is said to be "wet". What is the composition of the wet gas? How can the partial pressure of hydrogen be obtained from the total pressure of wet gas? From where will you obtain the ...

chemistry

Imagine that you have a 5.00 L gas tank and a 3.00 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 135 , to what pressure should you fill the ...

chemistry

Imagine that you have a 7.00 gas tank and a 3.50 gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 115 , to what pressure should you fill the ...

chemistry

A 5 mL sample of an unknown liquid is placed into a 250 mL flask that has had all of the air removed. The pressure measured in the flask is found to be 39.9kPa. In a separate trial the student puts 214 mL of the same liquid into the same flask at the same temperature. What ...

Chem

i don't get this ?.......If the weather forecast stated that the pressure is 104.2kpa. then what is the pressure in the atmosphere? and what would a barometer measure in mm of mercury need help please

physics

how tall must a water filled manometer be to measure blood pressure as high as 300 mm Hg? what do i use for pressure, density and height?

PLZ HELP MATH

this is pre calc arithmetic sequence. AT sea lvl pressure is 14.7 psi. It increases by 14.7 at every 30 ft descent. What is pressure at 1000 ft.

Chemistry

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 helium now be under? Second, what ...

algebra

when the temperature stays the same, the volume of the gas is inversely proportional to the pressure of the gas. If a balloon is filled with 87 cubic inches of a gas at a pressure of 14 pounds per square inch. Find the new pressure of the gas if the volume is decreased to 29 ...

(1-17)Chemistry - Science

Consider the reaction: SO2 (g) + NO2 (g)  SO3 (g) + NO (g) At T = 1000 K, where the reaction is exothermic with an equilibrium constant K = 9.00 If the reaction vessel is instead charged initially with SO3(g) and NO(g), each at a partial pressure of 0.500 atm, the ...

Chemistry

A sample of oxygen gas is collected by displacing water from an inverted bottle as shown in the diagram below. The volume of O2(g) collected is 400.0ml at 25 degree Celsius. The atmospheric pressure is 680 torr and the vapor pressure of water at 25 degree Celsius is 23.8 torr...

chemistry

The Clapeyron-Clausisus Equation is ln(P2/P1) = dHvap/R [(1/T1)-(1/T2)]. Assuming that dHvap doesn't change with the temperature, this equation relates the change in vapor pressure and temperature to a substances enthalpy of vaporization (R is the molar gas constant). Use this...

earth science

"perhaps more than any other single measurement, atmospheric pressure is the best indicator of current and changing weather conditions." explain and discuss thy this statement is correct. provide some examples (hint: discuss the difference in high and low pressure systems. how...

ap chemistry

An apparatus consists of a 2 L flask containing nitrogen gas at 25C and 819 kPa, joined by a valve to a 12 L flask containing argon gas at 25C and 51 kPa. The valve is opened and the gases mix. What is the partial pressure of nitrogen after mixing? Answer in units of kPa ...

Biology - Heart Rate/Blood Pressure

Hi, can someone help me with these questions? Why is it that athletes have to exercise harder/longer to get max heart rate than people that aren't physically fit? Why does smoking cause rise in blood pressure? (Does it have to do with less oxygen getting throughout the body...

chem

A 1-L flask is filled with 1.25g of argon at 25 ∘C. A sample of ethane vapor is added to the same flask until the total pressure is 1.35atm . What is the partial pressure of argon, PAr, in the flask? What is the partial pressure of ethane, Pethane, in the flask?

Science

2 spherical containers- P and Q are connected by a tap. P contains a gas at pressure 5 atm at 300K. Q contains same gas at pressure 2 atm at 400K. If tap is opened find the final pressure. Given: volume of Q is 4 times volume of P.

Physics

Which of the following is a direct result of the equation of continuity? a. The pressure one meter below the surface of water is about 10% greater than atmospheric pressure. b. The pressure on the inlet side of a horizontal pipe through which water is flowing at constant speed...

physics

A 45 m/s (100 mph) wind blows across the top of a flat-roofed house. Calculate the net force on the roof due to the pressure differential from inside the house to the outside. Assume that the pressure in the house is atmospheric pressure and that the roof has an area of 200 ...

Chemistry

The reaction 2NO (g) + 2H2 -> N2 (g) + 2H2O (g) was found to follow the rate law, rate = k[NO]^2[H2]. By what factor will the rate of reaction increase when the pressure of NO gas is increased from 2.0 atm to 3.0 atm? Assume all other conditions are held constant. I'm ...

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

Imagine that you have a 5.50 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 105 atm , to what pressure should you fill ...

chemistry

magine that you have a 7.00 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 105 atm, to what pressure should you fill ...

Chemistry

Imagine that you have a 5.50 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 155 atm, to what pressure should you fill ...

Chemistry

Imagine that you have a 5.00 L gas tank and a 4.00 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 105 atm, to what pressure should you fill ...

Chemistry

Imagine that you have a 7.00 L gas tank and a 4.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 136 bar , to what pressure should you fill ...

chemistry

Imagine that you have a 5.50 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 155 atm , to what pressure should you fill ...

Chemistry

Please help and explain each problem. PLEASE!!!! 1. If 29.0 L of methane, CH4, undergoes complete combustion at 0.961 atm and 140°C, how many liters of each product would be present at the same temperature and pressure? 2 If air is 20.9% oxygen by volume, a. how many liters ...

chemistry

Can someone please help me with some steps towards solving this problem? A glass tumbler containing 243.3cubic centimeters of air at 1.00e2kPa (barometric pressure) and 20Celsius is turned upsde down and immerse in a body of water to a depth o 20.5m. The air in the glass is ...

chemistry

At standard pressure, ammonia melts at 195 K and boils at 240 K. If a sample of ammonia at standard pressure is cooled from 200 K down to absolute zero, what physical constants are needed to calculate the change in enhtalpy? I) the heat capacity of ammonia(s) II) the heat ...

Chemistry

You are given 2.677 g of a mixture of KClO3 and KCl. When heated, the KClO3 decomposes to KCl and O2, 2 KClO3 (s) → 2 KCl (s) + 3 O2 (g), and 605 mL of O2 is collected over water at 28 °C. The total pressure of the gases in the collection flask is 763 mm Hg. What is the...

algebra

the function, p(d) =1 d + ____ 33 gives the pressure, in atmospheres (atm), at an depth d in the sea (d is in feet). Note that p(0)=1 atm, p(33) =2 and so on. find the pressure at 120 feet. The pressure at 120 fee is ____ atm.

chem

A 2.5L flask @ 15 degrees C cntains three gases. The partial pressure of N2 is 0.32 atm, and the partial pressure of the other two gases, He and Ne are 0.15 atm and 0.42atm respectivly. What is the total pressure in atm on the 2.5L flask?

Algebra 1

Pressure and volume vary inversely in the idea has law. The pressure exerted by a gas of volume 150cubic inches is 30 p.s.i. Find the pressure exerted by the gas if the volume is decreased to 50cuboc inches

Chemistry

A sample of nicotine weighing 0.3204 g was vaporized in a flask with a volume of 487 mL. This sample exrted pressure of 74.3 mm Hg at 20 degrees C. What is the molar mass of nicotine? I know this has to do with N=P*V/R*T. and 1 atm=760 mm Hg. Please help and show work. ...

Chemistry HELP!!

A sample of nicotine weighing 0.3204 g was vaporized in a flask with a volume of 487 mL. This sample exrted pressure of 74.3 mm Hg at 20 degrees C. What is the molar mass of nicotine? I know this has to do with N=P*V/R*T. and 1 atm=760 mm Hg. Please help and show work. ...

algebra

The volume of gas varies directly with temperature and inversely with pressure. Volume is 100 m^3 when temperature is 1508 degrees and pressure is 15 lb/cm^2. What is the volume when the temperature is 2508 degrees and the pressure is 20 lb/cm^2?

Chem

Please tell me if these are right? A mixture of oxygen and helium is prepared for a scuba diver that will descend to 125 feet below the ocean surface. At that depth the diver breathes a gas mixture that has a total pressure of 8atm. If the particle pressure of the oxygen in ...

Physics

A diver thinks that if a typical snorkel tube of 0.13 m length works, then a tube of length 6.2 m should also work. When trying to use such a tube, what is the pressure difference between the external pressure on the diver's chest and the air pressure in the lungs of the diver...

calculus related rates

Boyle’s law for the expansion of a gas is PV = k, where P is the pressure (in pounds per unit of area), V is the volume of the gas, and k is a constant. Find the expression that shows the rate of change of the pressure as related to the rate of change of the volume. dP/dt...

CHEMISTRY........

i TRIED TO DO IT, BUT MY ANSWERES ARE WRONG. Please show work and explain. 1. If 29.0 L of methane, CH4, undergoes complete combustion at 0.961 atm and 140°C, how many liters of each product would be present at the same temperature and pressure? 2 If air is 20.9% oxygen by ...

Chemistry

A two-liter plastic soft drink bottle can withstand a pressure of 5.00 atm. Half a cup (approximately 120mL) of ethyl alcohol, (d=0.789g/mL) is poured into a soft drink bottle at room temperature. The bottle is then heated to 100C (3sig figs), changing the liquid alcohol to a ...

Chemistry

A two-liter plastic soft drink bottle can withstand a pressure of 5.00 atm. Half a cup (approximately 120mL) of ethyl alcohol, (d=0.789g/mL) is poured into a soft drink bottle at room temperature. The bottle is then heated to 100C (3sig figs), changing the liquid alcohol to a ...

8gradescience

How do helmets protect your head? a.By creating a large area to spread out the pressure of a blow to your head. b.By focusing the pressure of a blow into a small area. c.By creating a vacuum that protects your head. d.By creating a pressure gradient that traps energy away from...

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