# osmotic pressure chemistry

64,382 results, page 29

1. ### chemistry

1.9 moles of Ar and 2.5 moles of Ne are added to a 10.0 L container at 20.0oC. What will the internal pressure (atm) be?
2. ### Chemistry

A gaseous mixture consists of 6.95 g of N2, 4.75 g of O2, and 2.75 g of He. What volume does this mixture occupy at 23°C and 1.35 atm pressure?
3. ### Chemistry

How many liters of ammonia gas can be formed from 11.3 L of hydrogen gas at 93.0 C and a pressure of 42.4 kPa?
4. ### Chemistry

10.7 L of a gas at 1.75 atm are expanded to 20.0 L at a constant temperature. What is the new gas pressure? *
5. ### Chemistry

The volume of a gas is 76cm3 at 27c and 800mm mercury pressure.what is the volume at s.t.p
6. ### Chemistry

What is the molar mass of a gas (96.0 g) in a 25.0 L container at 27.0 °C? The pressure inside the container is 3.04E5 Pa.
7. ### Chemistry

What is the molar mass of a gas (96.0 g) in a 25.0 L container at 27.0 °C? The pressure inside the container is 3.04E5 Pa.
8. ### Chemistry

A balloon holds 27.8 kg of helium. What is the volume of the balloon if the pressure is 0.97 atm and the temperature is 24 °C
9. ### Gen Chem 1

We want to change the volume of a fixed amount of gas from 745mL to 2.30L while holding the temperature constant. To what value must we change the pressure if the initial pressure is 102 kPa?
10. ### meteorolgy

Compute the relative humidity (RH) to nearest percent for each of the following atmospheric conditions: (Round to one decimal place, do not include units.) b. vapor pressure = 4 mb, saturation vapor pressure = 16 mb, RH = _________%
11. ### Math

A hurricane wind blows across a 6.00 m times 15.0 m flat roof at a speed of 190 km/hr. Is the air pressure above the roof higher or lower than the pressure inside the house? Explain. Need help
12. ### chem

.If the pressure of the gas in a 2.31 L balloon is 0.120 atm and the volume increases to 7.14 L, what will be the final pressure of the air within the balloon? Round to the nearest hundredth. Don't forget the units. i really tried but i need help
13. ### physics

fluid of constant density = 960 kg/m3 is flowing steadily through the above tube. The radius at the sections are r1 = 0.05 m, r2 = 0.04 m. The gauge pressure at 1 is P1 = 200 000 Pa and the velocity here is v1 = 5 m/s. We want to know the gauge pressure at section 2.
14. ### Chemistry

A pressure of 25.7inHg would be how many kilopascals? Can you do it step by step please. Thank you
15. ### chemistry

A vapor pressure of toluene of 21 mm Hg, at 760 mm Hg, what is the equilibrium concentration for toluene?
16. ### chemistry

11. Calculate the total pressure of a mixture of 0.02 mol He and 0.01 mol H2 in a 5.0 L flask at 10 ºC.
17. ### Chemistry

Calculate the vapor pressure of Hg at 14 oC (in atm). Hg(l) ↔ Hg(g) . . . ΔHo = 61.32 kJ and ΔSo = 98.83 J/K
18. ### Chemistry

Is it true that the higher the boing point, the higher the vapor pressure?
19. ### chemistry

A 6.0-L flask contains 0.60 g at a temperature of 25°C. What is the pressure (in atm) inside the flask?
20. ### Chemistry

A gas initially at 20 degrees C it must be changed to (blank) degrees C to triple the pressure.
21. ### chemistry: Gas Laws

how do i setup this problem: What is the pressure of 0.5 mol of a gas with a volume of 6L at 27degreesC?
22. ### chemistry

a 5.0-L flask contains 0.60 g 02 at a temperature off 22degrees C.what is the pressure (in atm) inside the flask?
23. ### Chemistry

what is the water vapor pressure of water at 29 degrees celsius? i can't find the information anywhere.
24. ### chemistry

If 4.05 g of methane gas (CH4) is introduced into an evacuated 1.40 L container at 53°C, what is the pressure in the container?
25. ### chemistry

If 4.05 g of methane gas (CH4) is introduced into an evacuated 1.40 L container at 53°C, what is the pressure in the container?
26. ### chemistry

a sample of air has a volume of 140.0 mL at 67 degrees C. At what temperature will its volume be 50.0 mL at constant pressure?
27. ### Chemistry

If the pressure on a 1.04 L sample of gas is doubled at the constant temperature, what will be the new volume of the gas?
28. ### chemistry

a 15-gram sample of a gas has a volume of 30 liters at standard pressure. what is the densty of the gas
29. ### chemistry

A 6.58g sample of compound was placed in a 12.6 L container. At 25.0*C, the pressure was found to be 0.75 atm. what is this compound?
30. ### Chem

Chemistry please help. A 20.0-L gas cylinder contains 4.80 g H2 at 25 degree celcius. what is the pressure of this gas?
31. ### chemistry

20 g of CO2 is placed in 0.75l Bottle and sealed. what is the pressure in the bottle if the temp is 25C?
32. ### Basic Chemistry

What is the pressure of 64.0 g of oxygen gas in a 1.50-L container at -37°C a. 4.12atm b. 51.6atm c. 19.6atm d. 8.2atm
33. ### CHEMISTRY HELP ASAP

A 1.26 g sample of He gas has a pressure of 0.123 atm and a volume of 32.6 L. What is the temperature of the sample, in °C?
34. ### Chemistry

A 3.0 L volume of methane gas is cooled from 59.4°C to 30.0°C. If the pressure remains constant, what is the final volume (L)?
35. ### Chemistry

At what temperature does 150 mL of n2 at 300 K and 1.13 atm occupy a volume of 550 mL at a pressure of 1.89 atm?
36. ### Chemistry

10.7L of a gas at 1.75 atm are expanded to 20.0L at a mass constant temperature.what the new gas pressure?
37. ### Chemistry

10.7L of a gas at 1.75 atm are expanded to 20.0L at a mass constant temperature.what the new gas pressure?
38. ### Chemistry

10.7L of a gas at 1.75 atm are expanded to 20.0L at a mass constant temperature.what the new gas pressure?
39. ### Chemistry

A sample of gas has a volume of 6.20 L at 23 degrees celsius at a pressure of 1.90 atm. What is its volume at STP?
40. ### Chemistry

At a pressure of 103kPa and a temperature of 22 degrees C, 52.9 g of a certain gas has a volume of 31.5 L. what is the identity of this gas?
41. ### chemistry

The concentration of CO2 in an unopened soda can is 0.0506 m at 25 C. What is the partial pressure of CO2 gas in the can?
42. ### chemistry

what is the partial pressure of hydrogen in a flask containing 2g hydrogen and 32g sulphur dioxide
43. ### chemistry

Calculate the pressure exerted by 1.2 mol\rm mol of gas in a volume of 28.2 L\rm L and at a temperature of 334 K\rm K.
44. ### Chemistry

A sample of 20.0 g of chlorine gas at 15 degrees Celsius occupies a volume of 5.0 L. What is the pressure of the gas?
45. ### Chemistry

At normal temperature and pressure, air has a density of 0.001184 g/mL. What is the mass of air in a room that is 3.93 m by 2.28 m by 2.25 m?
46. ### Chemistry (mol)

How many mol of nitrogen monoxide gas (N2) are in a 1.49 L container at standard temperature and pressure?
47. ### Chemistry

Heyy, okay I have this question about chemistry and its driving me nuts. It feels like I am so close but am just missing something. The question is: A vessel of 6.84 L in volume contains 3.61 L of pure water at 25°C. A partial pressure of 3.67 atm of CO2 is quickly injected ...
48. ### AP Physics B (chemistry bit)

I think I'm doing this wrong In an internal combustion engine, air at atmospheric pressure and a temperature of about 20 degrees celcius is compressed in the cylinder by a piston to 1/9 of its original volume (compression ratio = 9.0). Estimate the temperature of the ...
49. ### Chemistry

I'm having trouble understanding rate laws and manipulating them. So, for example, the rate law is rate= k[CO2][O3]. I was taught, maybe if I am just forgetting some pieces(been awhile), if I were to triple/double the partial pressure of CO2/O3, the rate of that element would ...
50. ### Physics

If the pressure outside a window drops by 9.1%, while the pressure inside does not change, what is the force on the window? Assume that the area of the window is 2.3 m2.
51. ### physics

What is the pressure at the bottom of a river (12 m deep) if the air pressure over the river is 98.23 kPa? The density of the river water is 988 kg/m3.
52. ### physics

What is the pressure at the bottom of a river (12 m deep) if the air pressure over the river is 98.23 kPa? The density of the river water is 988 kg/m3.
53. ### Chemistry

Explain what happens when you add sodium chloride to boiling water. I know that when sodium chloride is added to water, the boiling point of water increases. What happens when it is added to already boiling water? I know it increases the temperature, I just don't know why... I...
54. ### Chemistry

How will the volume of a fixed sample of gas change if its pressure is doubled and the Kelvin temperature is doubled? a)the change cannot be determined without more specific information b)it will decrease by a factor of 2 c)it will increase by a factor of 4 d)no change e)it ...
55. ### Chemistry

If a solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC ..is how many torr?
56. ### AP Chem

The following reaction has Kp = 109 at 25°C. 2 NO(g) + Br2(g) 2 NOBr(g) If the equilibrium partial pressure of Br2 is 0.0159 atm and the equilibrium partial pressure of NOBr is 0.0768 atm, calculate the partial pressure of NO at equilibrium.
57. ### chemistry

i reallly need help with combining the gas laws. here are a few questions i am struggling with if anyone could please help! 1. A steel container holds 750.L of O2 gas at STP. a) how many moles of O2 does the container hold? b)how many grams of O2 does the container hold? c) if...
58. ### Stastics

A researcher wanted to test the effect of a new drug on reducing blood pressure. In the study, there were 35 participants. The researcher measured the participants’ blood pressure before and after the drug was administered. If we want to compare the mean blood pressure from ...
59. ### Physics

A tropical cyclone with wind speed of 170km/h. "Estimate the air pressure at the eye of the cyclone." Assuming that: *it is a laminar flow of air *wind speed outside the cyclone is zero. * the pressure is at normal atm pressure outside the cyclone. *measurement taken at the ...
60. ### Chemistry

A balloon filled with 0.01 mol of hydrogen gas is kept constant at 25 degrees Celsius. If the pressure is increased from 1atm to 1.5atm, what is the resulting volume? _______________________________________ C3H8(g) + 5 O2(g)-->3 CO2(g) + 4 H2O(g) A 0.03 mol sample of C3H8 ...
61. ### math

Aerosol cans carry clear warnings against incineration because of the high pressures that can develop upon heating. Suppose a can contains a residual amount of gas at a pressure of 755 mm Hg and a temperature of 25 °C. What would the pressure be if the can were heated to 1155...
62. ### chemistry

a sample of air has a volume of 140.0 mL a 67 degrees C. at what temperature would its volume be 50.0 mL at constant pressure/
63. ### Chemistry

If the column of water in the water bormeter rose to a height of 35 feet, what would the atmospheric pressure be in mm Hg?
64. ### Chemistry

At a pressure of 103 kPa and a temperature of 22oC, 52.9 g of a certain gas has a volume of 31.5 L. What is the identity of this gas?
65. ### chemistry

CH3OH(g) CO(g) + 2 H2(g) H = +90.7 kJ . Calculate the amount of heat transferred when 35.0 g of CH3OH(g) are decomposed by this reaction at constant pressure
66. ### Chemistry

If oxygen is removed from a sample of air as iron rusts, what happens to the total pressure of the air?
67. ### chemistry

what pressure (in atm) is exerted by a column of mercury 1.4O high? The density of mercury is 13.5951 g/cm3.
68. ### chemistry

1.44 liters of gas at 0.935 atm are compressed to 0.275 l. Find the new pressure in atm.
69. ### chemistry

a 2 l gas bulb contains 4.07*10^23 N2 molecules. If the pressure is 3.05bar, what is the rms speed of the N2 molecules? What is the temperature?
70. ### chemistry

Density of mixture of oxygen and nitrogen is 1.28 gm/lit at stp. Calculate partial pressure of oxygen.
71. ### Chemistry

in a closed system at 40 C, a liquid has a vapor pressure of 50 KPa. the liquid's normal boiling point could be (1)10 C (2)30 C (3)40 C (4)60 C
72. ### chemistry

An unopened soda can has an aqueous CO2 concentration of 0.0506 m (molality) at 25 C. What is the pressure of CO2 gas in the can?
73. ### Chemistry 105

A sample of N20 gas has a density of 2.65 g/L at 298 K. What must be the pressure of the gas (in mmHg )?
74. ### Chemistry

Determine the volume of nitrogen gas at a pressure of 3.00 atm if it had a volume of 400.0 mL at STP.
75. ### CHEMISTRY

Determine the pressure in atm for a 10 g of CO2 sample contained in a sealed 10 L tank at 50degrees C? Did anyone get 26.5 atm?

77. ### Chemistry

An elemental gas has a mass of 10.3 g. If the volume is 58.4 L and the pressure is 758 torre at a temperature of 2.5 degrees C, what is the gas?
78. ### Chemistry H

If the pressure on the surface of water in the liquid state is 30 kpa, the water will boil at... 0, 30, 70, or 100 degrees c?
79. ### Chemistry

Calculate the pressure of 0.800 moles of helium gas, when the gas is in a balloon with a volume of 2.30 L at a temperature of 32°C.
80. ### chemistry

a gas occupies 37.6 L at 2.00 atm pressure and 27C degrees. how many moles of gas are present in this sample
81. ### Chemistry

If 3.50 mol of A is mixed with 0.750 mol of B and the final pressure of the mixture is 3.25 atm, what are the partial pressures of A and B
82. ### chemistry

A balloon filled with 85 g of nitrogen gas that produced a pressure of 3.25 atm at 58C. What is the volume of the balloon/
83. ### Chemistry

At a given temperature and pressure how does the magnitude of the heat of vaporization of a substance compare with that of its heat of condensation?
84. ### chemistry

what happens to water at 100 degrees celsius as pressure is increased fro 0.8 atm to 1.2 atm?
85. ### Chemistry

At constant pressure , a certain gas occupies 80cm3 at 0 degrees, what wil be its volumd at 10 degrees
86. ### Chemistry

In a reversible reaction PCl5 ↔ PCl3 + Cl2, the value of K is 2.5. What will the partial pressure of Cl2 be?
87. ### Chemistry

If a 30.pL tank of laughing gas contains 2.74 moles of N2O at 25 degrees C, what is the pressure (atm) in the tank?
88. ### Chemistry

A gas diffuses 3.98 times slower than H2 at the same temperature and pressure. What is the molar mass of the gas?
89. ### chem

A liquid that has an equilibrium vapor pressure of 129 torr at 25°C is placed into a 1-L vessel like that shown below. A few mL of the liquid is introduced into the vessel at 25°C while it has a pressure of 1.00 atm of air in it, without allowing any of the air to escape. ...
90. ### chemistry

A sample of N2 with a pressure of 790mmHg at -80∘C is heated to 35∘C.
91. ### Chemistry

Why is the pressure of a gas does not depend on the molar mass of the gas?
92. ### Physics

Some hydrogen gas is enclosed within a chamber being held at 200C with a volume of 0.025m^3. The chamber is fitted with a movable piston. Initially, the pressure in the gas is 1.50*10^6 Pa (14.8 atm). The piston is slowly extracted until the pressure in the gas falls to 0.95...
93. ### Science

PRessure is measured in Pascals (Pa). What combination of units is the same as a Pascal? and When you exert a force on a fluid in a closed container, does the pressure increase, decrease or remain constant? I think it will increase, but I'm not totally sure.
94. ### Physics

Pressure = weight density × depth Calculate the water pressure at the bottom of the 50-m-high water tower shown in the photo. Express your answer to two significant figures and include the appropriate units
95. ### chem

A 5.2 litre baloon at 900 torr of pressure. If the temp is kept constant and the pressure is reduced to 200 torr what is the voume in the balloon? Is this a trick question? My instinct is to say the volume is the same, 5.2 litres.
96. ### Fluid

A research submarine is designed to operate 3 km below the ocean surface. If then interior pressure is 1 atm, what is the total pressure on a 15cm diameter window and force on window. The average density of seawater is 1028 kg/m3
97. ### air pressure

two diffrent unitsused to measure air pressure
98. ### Chemistry

The vapor pressure of chloroform is 173.11 mm Hg at 25 degrees celsius. A nonvolatile, nonelectrolyte that dissolves in chloroform is aspirin. Calculate the vapor pressure of the solution at 25 degrees celsius when 6.243g of aspirin (180.1g/mol) are dissolved in 244.5g of ...
99. ### Chemistry

What is the molecular weight of a gas if a 15.0g sample has a pressure of 836 mm Hg at 25.0 degrees C in a 2.00 L flask? a)167 b)1.35 c)176 d)11.1 e)none of the above Please explain... I need to understand how to do this. Thanks.
100. ### Chemistry

What is the percent aluminum in a sample weighing 1.85 grams. If 35 mL of wet hydrogen gas was produced @ 24 degrees Celsius under a total pressure of 752 torr?