osmotic pressure chemistry
64,480 results, page 22

Chemistry
Calculate the density of F2 gas at 27 degree Celsius and 1.00 atm pressure? 
CHEMISTRY
What pressure would be required to form a 0.045 M solution of helium (kH = 3.7 x 104 M/atm) at 25 °C???? 
chemistry
What volume does 627 cm3 of a gas at 14°C occupy at 40°C, if the pressure does not change? 
Chemistry AP
What is the mass of oxygen in a ml flask if the pressure is 1.00 atm and a temperature of 22.0 Celsius? 
Chemistry
Which solution has a higher vapor pressure, 1 M NaCl or 1 M glucose(C6H12O6)? 
chemistry
Assuming a temperature of 37 C and 1 atm pressure, how many mol/min of CO2 is this? 
CHEMiSTRY
what is the relationship between the pressure of a gas and the absolute temperature when the volume is kept constant ? 
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 help me please
What values does STP have for pressure in the units of kPa and atm and mmHg? 
math
Air pressure at sea level is 30 inches of mercury. At an altitude of h feet above the, air pressure, P, in inches of mercury, is given by, P =30e^(3.23x105h) a)Find th equation of the tangent line at h=0. b)A rule of thumb is given by travelers is that air pressure drops ... 
physics
A 45 m/s (100 mph) wind blows across the top of a flatroofed 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 ... 
Physics
Bioluminescence Some species of dinoflagellate (a type of unicellular plankton) can produce light as the result of biochemical reactions within the cell. This light is an example of bioluminescence. It is found that bioluminescence in dinoflagellates can be triggered by ... 
Chemistry
Assume that you have a liquid in a cylinder equipped with a movable piston. There is no air in the cylinder, the volume of space above the liquid is 200 mL, and the equilibrium vapor pressure above the liquid is 29.0 mm Hg. What is the equilibrium pressure above the liquid ... 
Math
the air pressure of hurricane katrina at landfall was greater than 17 millibars plus the air pressure p before landfall. write and solve an inequality to find the air pressure of the storm before landfall i think the answer is l>17 millibars+p 
Gas laws and pressure
An automobile tire has a pressure of 325 kPa when the temperature is 10 degrees Celsius. If the temperature of the tire rises to 50 degrees Celsius and its volume is constant, what is the new pressure? 
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 
chem
a flask containing 155cm^3 of hydrogen was collected under a pressure of 22.5 kPa. what pressure would have been required for the volume of gas to have been 90.0 cm^3 assuming the same temperature? 
chem
The atmospheric pressure at the summit of Mt. McKinley is 554 mm Hg on a certain day. What is the pressure in atmospheres and in kilopascals? What are the conversions or formulas for this problem?? 
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? 
science
130cm3 of a gas at 20oc excert a pressure of 750mmhg calculate it's pressure if it's volume is increased to 150cm3 at 35oc 
PHYSICS
The truck in that example is traveling at 19 m/s. The density of air is 1.29 kg/m3. By how much does the pressure inside the cargo area beneath the tarpaulin exceed the outside pressure? 
Science
22g N2, 44g CO2 and 18g of CH4 in contenar if the pressure is 750mm calculated of the partial pressure of each gases 
physics
Determine the absolute pressure at the bottom of a lake that is 13.3 m deep. The acceleration of gravity is 9.8 m/s 2 and atmospheric pressure is 1.01 × 10 5 Pa . Answer in units of Pa 
chem
The following reaction is used in some selfcontained breathing devices as a source of O2. 4KO2(s) + 2C02(g)> 2K2CO3(s) + 3O2(g) Suppose that a sample of CO2(g) is added to an evacuated flask containing KO2(s) and equilibrium is established. The equilibrium partial ... 
Physics
What is the absolute pressure if the gauge pressure is 3.2 atm? 
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
A twoliter 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 twoliter 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
The ClapeyronClausisus 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... 
Statistics
The coefficient of correlation between the age and blood pressure of a sample of 8 persons was found to be +0.8, the average age is 50 years and average blood pressure is 60. Their standard deviations were 5 and 10 respectively. a) Obtain the two regression equations b) find ... 
static
The coefficient of correlation between the age and blood pressure of a sample of 8 persons was found to be +0.8, the average age is 50 years and average blood pressure is 60. Their standard deviations were 5 and 10 respectively. a) Obtain the two regression equations b) find ... 
Algebra
Boyle's Law says that the volume of a gas varies inversely with the pressure. When the volume of a certain gas is 4L, the pressure is 165 kPa(kilopascals). What is the volume when the pressure is 60 kPa? 
CHemistry Help pleaseee
Imagine that you have a 6.00 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 115 atm, to what pressure should you fill ... 
Chemistry
Imagine that you have a 7.00L gas tank and a 3.50L 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 135atm , to what pressure should you fill the... 
chemistry
Imagine that you have a 5.00L gas tank and a 3.50L 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 145atm , to what pressure should you fill the... 
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 5.50 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 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 5.00 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
Predict the order of increasing vapor pressure (at a given temperature) for the following compounds: FCH2CH2F and FCH2CH2OH and HOCH2CH2OH. Explain your decision briefly. ANSWER: I suppose the order is FCH2CH2F and FCH2CH2OH and HOCH2CH2OH (increasing from left to right)... 
chemistry
Consider a liquid at 90 bar and 40 °C. What is the change in entropy of the substance as you change the conditions to 1 bar and 150 °C by expanding the liquid while heating? Vapor pressure = 59.2 bar heat of vaporization = 1.82 kJ/mol , both at 150 degree C Heat capacity = ... 
Chemistry
Predict the effect of each of the following on the indicated equilibrium system in terms of which reaction will be favored (forward, reverse, or neither) H2(g)+Cl2(g)<=>2HCl(g) +184 kJ A)addition of Cl2 B)removal of HCl C)increased pressure D)decreased temperature E)... 
chemistry
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
I'm having trouble getting the right answer for a problem, I'm hoping that by posting my work someone can help me figure out where I've gone wrong. A twoliter soft drink bottle can withstand a pressure of 5 atm. Half a cup [approximately 120 mL) of ethyl alcohol C2H5OH, (d= 0... 
chemistry
Which of the following is NOT true of colligative properties? Colligative properties are... A. dependent on the mass of solute present. B. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. C. independent of the chemical ... 
Chemistry
Which of the following is NOT true of colligative properties? Colligative properties are... A. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. B. dependent on the mass of solute present. C. independent of the chemical ... 
AP Chemistry
The equilibrium constant for the reaction PCl3(g) + Cl2(g)<> PCl5(g) is 35000 at 760◦C. At equilibrium, the partial pressure of PCl5 was 110 bar and that of PCl3 was 9.98 bar. Calculate the equilibrium partial pressure of Cl2. Answer in units of bar 
Chemistry
Given data collected for a liquid. Equilibrium vapor pressure in torr: 4.6, 17.5, 149.4, 525.8 T in *C 0., 20., 60., 90. *Find T in K, Find 1/T in K1 and 1n VP. *Then make a graph of 1n vapor pressure (1n VP) versus 1/T (where temperature is in units of Kelvins.) Using linear... 
Chemistry
A gas storage tank has a volume of 350,000 when the temperature is 27 degrees celcius and the pressure is 101 kPa. what is the new volume of the tank if the temperature drops 10 degrees celcius and the pressure drops to 95 kPa? please show work. 
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. 
Science
Why is is it important to place your arm in a horizontal position rather than letting it hang down at your side when you take your blood pressure? Does everyone's heart create the same pressure? Why or why not? 
chem
A 250 mL sample of oxygen is collected over water at 25 degrees Celcius and 760.0 torr pressure. What is the pressure of the dry gas alone? 
Physics.. Force and pressure
A tank 4m long, 3m wide and 2m is filled to the brim with paraffin. (density 800kg /m3) calculate the pressure on the base. 
math
Find the pressure exerted by the atmosphere on a car window which is 30 cm tall and 40 cm wide if atmospheric pressure is 101,000 Pa. (Remember that a Pa = N/m2) 
Physics
A cook puts 7.20 g of water in a 2.00L pressure cooker that is then warmed to 530°C. What is the pressure inside the container? (Assume room temperature is 20°C.) 
last physics problem.
At 25.0 m below the surface of the sea(density=1025 kg/m^3) where the temperature is 5.00 C, a diver exhales an air bubble having a volume of 1.00 cm^3. If the surface temperature of the sea is 20.0 C, what is the volume of the bubble just before it breaks the surface? You ... 
Chem
A bicycle tire is filled with air to a pressure of 100 psi at a temperature of 19C. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58C. The volume increases by 4%. What is the new pressure of the tire? Convert the temps to Kelvins, then use ... 
Chemistry  Urgent Please help!!
The problems: 0.0513 grams of Al (Wt. 27.0) was reacted with excess HCI to produce H2 according to the following balanced equation: 2 Al + 6 HCI > 2 AlCl3 + 3 H2 a) Determine the number of moles of H2 evolved from that quantity of Al when collected over water? 0.0513g Al... 
chemistry
Which of the following is NOT true of colligative properties? Colligative properties are... A. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. B. independent of the chemical identity of the solute. C. dependent on the ... 
MathAlgebra
The pressure of a gas varies directly as its temperature. IF the pressure of a gas is 200 pounds per square inch (lb/in^2) at a temperature of 65.5 degrees C, what is the pressure of the gas when the temperature is 250 degrees F? 
algebra
The volume V of a gas varies inversely as the pressure P and directly as the temperature T. A certain gas has a volume of 20 L, and a temperature of 320 K, and a pressure of 1 atm. If the gas is compressed to a volume of 15 L and is heated to 330 K, what will the new pressure be? 
Chemistry
The solubility of NH3 in H2O is 518 g/L at a partial pressure of 760.0 torr. a. Calculate the value of the Henry's Law constant for NH3 b. Calculate the solubility of NH3 in H2O at a partial pressure of 225.0 torr. 
ap chemistry
What is the value of w (work) when 1.3 moles of H2 expands from 25 liters to 50 liters against a constant external pressure of 1 atm, then expands further from 50 to 100 liters against a constant external pressure of 0.1 atm? Answer in calories. Answer in units of cal 
AP Chemistry
What is the value of w (work) when 2.6 moles of H2 expands from 25 liters to 50 liters against a constant external pressure of 1 atm, then expands further from 50 to 100 liters against a constant external pressure of 0.1 atm? Answer in calories. Answer in units of cal. 
garyson
A person rides up a lift to a mountaintop, but the persons ears fail to pop –that is, the pressure of the inner ear does not equalize with the outside atmosphere. The radius of each ear drum is 0.40×10ˆ2m. The pressure of the atmosphere drops from 1.010×10ˆ5 Pa at the ... 
chemistry
A benzene solution of a nonvolatile solute exhibits a vapor pressure of 90.5 torr at 25 degree C. The vapor pressure of benzene at 25 degree C is 93.9 torr.. what is the mole fraction of the solute in this solution? 
Subliming a substance
Question: A substance has a vapor pressure of 50 mmHg at the melting point (100C). Describe how you would experimentally sublime that substance. My answer: I would put the substance in a sidearm test tube apparatus, put ice in the smaller tube and apply pressure and apply. ... 
Mass Transfer
Solution of methanol and ethanol are substantially ideal. (a) Compute the vapourliquid equilibria for this system at 1 and at 5 atm abs pressure, and plot xy and txy diagrams at each pressure (b) For each pressure compute relative volatilities , and determine an average value... 
Chemistry 101
Are these correct? 1. A sample of gases contains three gases at the following pressures: 1.2 atm N2, 3.2 atm O2, and 0.56 atm Xe. What is the total pressure in the container? a. 5.0atm b. 1.4atm c. 2.2atm d. 1.0atm e. 1.7atm I am pretty sure it is A. Is that correct? 2. The ... 
college physics
a glass container was filled with oil with a density of 0.80 g/cm^3 up to 9 cm. in height. 1) what is the pressure at the base of the container? 2) what is the pressure if depth is 3 cm. from the surface of the oil? 3) what is the pressure if depth is 4 cm. above the base? 
chem
A sample of O2 gas was collected over water at 23ºC and 711 torr. What is the partial pressure of the O2? (The vapor pressure of water at 23ºC is 21.2 torr.) Partial pressure of O2:_____torr 
CHEMISTRY
The volume of air in a persons lungs is 615 mL at a pressure of 760 mmHG inhalation occures at the pressure in the lungs drops to 752 mmHG, to wha volume did the lungs expand I got 615*760=V2*752=621 i keep getting 621 and the answer is 620 what i'am i doing wrong 
Chemistry
A solution contains naphthalene (C10H8) dissolved in hexane (C6H14) at a concentration of 15.00% naphthalene by mass. Calculate the vapor pressure at 25 ∘C of hexane above the solution. The vapor pressure of pure hexane at 25 ∘C is 151 torr. I keep getting 168 torr... 
Chem
At 930 K, Kp = 0.30 for the following reaction. 2 SO2(g) + O2(g)=>2 SO3(g) Calculate the equilibrium partial pressures of SO2, O2, and SO3 produced from an initial mixture in which the partial pressures of SO2 and O2 = 0.51 atm and the partial pressure of SO3 = 0 (exactly... 
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
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
A gas occupies 21.0 L at 2.00 atm pressure and 27oC. Calculate its volume at STP. 
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
Calculate % of lowering of vapour pressure if 36 g glucose is added in 312g of benzene 
URGENT chemistry
What pressure is exerted by 0.625 mol of a gas in a 45.4 L container at 24.0ºC 
chemistry
convert the value of the vapour pressure (149.4 torr) at 60 degree celsius to atm 
chemistry
calculate the pressure,in atmospheres, of 2.00 mol helium gas in a 10.0L container at 27 celcius? 
Chemistry
Is barometric pressure of 765.7 mmHg is equivalent to 1.008 atm? I'm confused. 
chemistry
calculate the pressure,in atmospheres, of 2.00 mol helium gas in a 10.0L container at 27 celcius? 
AP Chemistry
Will a nonvolatile solute always lower the vapor pressure of the pure solvent in solution? Why or why not? 
Chemistry
Why do gases behave in a less ideal manner when in LOW TEMP. AND HIGH PRESSURE? 
Chemistry
calculate q , w , and ∆ E for melting 1.00 mol of ice at 0 ◦ C and 1.00 atm pressure 
chemistry
to what temperature must a given mass of nitrogen at zero degree be heated so that both it volume and pressure will be doubled 
chemistry
Calculate the volume occupied by 7g of nitrogen gas at 27 degree c and 750 mm of hg pressure 
chemistry
how does the addition of a nonvolatile solute affect the vapor pressure of the solvent into which it is dissolved? 
Kainantu sec..science(chemistry)
How many moles of O2 are there in the above sample at the initial temperature and pressure? 
science , chemistry
Is lowering of vapour pressure also a colligative property? since mathematically p*a  pa/p*a=xa =>p*apa=p*aXa => p*apa~xa 
Chemistry
How much work (in J) is required to expand the volume of a pump from 0.0 L to 2.3L against an external pressure of 1.0atm ? 
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
Could someone please tell me how to solve this problem: A pressure of 25.7 inHg would be how many kilopascals? Could you please list the steps on solving it. Thanks 
Chemistry
What is the pressure exerted by a .500 mol sample of nitrogen in a 10.0L container at 20C? 
chemistry
Under what conditions of temperature and pressure do you think that the gas laws would work best? List specifics.