# osmotic pressure chemistry

64,238 results, page 31

1. ### College Chemistry

The value of ΔG°f at 25°C for gaseous mercury is 31.85 KJ/mol. What is the vapor pressure of mercury at 25°C? [Hint: calculate the Kp for the reaction Hg(l)=Hg(g)]
2. ### Chemistry

What is the pressure in a 2.00 L container which holds 0.100 mol of methane and and 0.200 mol of carbon dioxide at standard temperature?
3. ### chemistry

what pressure (atm) is exerted by a column of ethanol 86.0 cm high? the density of ethanol is 0.789 g/cm3 and 9.8 m/s2 as your gravitational constant.
4. ### chemistry

what pressure (atm) is exerted by a column of ethanol 86.0 cm high? the density of ethanol is 0.789 g/cm3 and 9.8 m/s2 as your gravitational constant.
5. ### chemistry

what would be the vapor pressure of water in a solution wiith 23.7g NaCl dissolved in 500mL of water at 50degrees centigrade
6. ### Chemistry

If C(s) + CO2(g) <-> CO(g), when equilibrium is established at 1000K, the total pressure in the system is 4.70 atm. A. If kp= 1.72, what are the partial pressures of CO and CO2? B. What is Kc of the reaction?
7. ### chemistry

The vapor pressure of water @ 80 degrees C is 0.467 atm. Find value of Kc for the reaction H2O(l) to H2O(g) @ this temp.
8. ### chemistry

What pressure (atm) is exerted by a column of ethanol 49.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational constant.
9. ### Chemistry

What pressure (atm) is exerted by a column of ethanol 49.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational constant.
10. ### Chemistry 101

A sample of a gas (5.0 mol)at 1.0 atm is expanded at constant temperature from 10.0 L to 15 L. The final pressure is _______ atm.
11. ### Chemistry

A sample gas is 3.7 L at 15.3 degrees C and the pressure is held at constant. What would be the volume if the temp was raised to 153 degrees C?
12. ### Chemistry

The boiling point of ethanol is 78.5C and delta H vap = 40.5kJ/mol. Calculate the vapor pressure (in torr) of ethanol at 0.0C ?
13. ### Science

What is the boiling point of ethanol when the atmospheric pressure is 60kPa? I decided to repost this ? under Science instead of Chemistry. Thanks.
14. ### Chemistry

It is found that an unknown gas has a density of 2.5 times that of Oxygen gas of the same Temperature and Pressure. What is its molecular weight?
15. ### chemistry

A cylinder contains 12.0L of air at a total pressure of 44.0psi and a temperature of 35degrees C.How many moles of gas does the cylinder contain?
16. ### chemistry

You have 120.8 grams of CO2 at 2.5 atm and 18.4oC in a 10.0 L fixed volume container. What is the internal pressure(atm)?
17. ### Chemistry II

A solution is made by mixing 38.0 mL of ethanol, C2H6O, and 62.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C?

The direction that heat will flow is BEST determined by _____. A. energy B. pressure C. temperature D. potential energy
19. ### chemistry

what is the heat of vaporization if the vapor pressure of liquid water at 25 °C is 23.8 Torr and at a boiling point of 100 °C is 760 Torr.
20. ### Chemistry

What weight of solute (M,wt =60) is required to be dissolved in 180gm of water to reduce vapour pressure to 4/5th of pure water?
21. ### chemistry

If 2.25g of a gas occupies 1750mL at 180 degrees Celsius and 550mm Hg of pressure, what is the molecular weight of the gas?
22. ### Chemistry

(Ideal Gas Law) Calculate the volume of a 0.25 mole sample of gas at 25.0 degreeC and a pressure of 1.50 atm (R= 0.0821)
23. ### Chemistry

A small cylinder of compressed gas has a volume of 396.6 ml and contains 47.9 g of CO2 at 25°C. What is the pressure (atm) inside the cylinder?
24. ### chemistry

A 15.0L sample of argon has a pressure of 28.0 atm . What volume would this gas occupy at 9.90 atm? Assume ideal behavior.
25. ### chemistry

A sample of helium gas has a volume of 328 mL at 0.69 atm. What pressure is needed to reduce the volume at constant temperature to 32 mL?
26. ### Chemistry

The pressure on a gas at -58 degrees Celcius is doubled, but its volume is held constant. What will the final temperature be in degrees Celsius?
27. ### Chemistry

A sample of a gas has a volume of 250. mL at 2.10 atm and 227 oC. What volume will it have at standard temperature and pressure (STP)?
28. ### Chemistry

Methane gas, CH4, is sold in a 43.0L cylinder containing 5.91kg .What is the pressure inside the cylinder (in kilopascals) at 21∘C?
29. ### chemistry

2.00 m^3 of nitrogen gas at 14 ºC and 100 kPa is compressed to occupy 0.50 m^3. and its temperature rises to 42 ºC. Calculate the new pressure of the gas
30. ### Chemistry

If 0.896 g of a gas occupies a 250 mL flask at 20 degrees Celsius and 760 mm Hg of pressure, what is the molar mass of the gas?
31. ### chemistry

A mixture containing 2.81 g each of CH4 (g), C2H4 (g) and C4H10 (g) is contained in a 1.50 L flask at a temperature of 35 oC. What is the partial pressure (in atm) of C4H10 (g)?
32. ### chemistry

What is the delta Hvap of a liquid that has a vapor pressure of 612 torr at 77.6 degrees C and a boiling point of 94.9 degrees C at 1 atm
33. ### chemistry

What is the delta Hvap of a liquid that has a vapor pressure of 612 torr at 77.6 degrees C and a boiling point of 94.9 degrees C at 1 atm
34. ### chemistry

What is the delta Hvap of a liquid that has a vapor pressure of 612 torr at 77.6 degrees C and a boiling point of 94.9 degrees C at 1 atm?
35. ### chemistry

What is the delta Hvap of a liquid that has a vapor pressure of 612 torr at 77.6 degrees C and a boiling point of 94.9 degrees C at 1 atm?
36. ### chemistry

what is the delta Hvap of a liquid that has a vapor pressure of 612 torr at 77.6 degrees C and a boiling point of 94.9 degrees C at 1 atm
37. ### chemistry

determine the pressure in a 0.34 liter balloon if the temperature is 35 celsius and the balloon contains 0.0233 mol of an ideal gas.
38. ### chemistry

Suppose that 2.69 mol of hydrogen gas occupies a 64.6 L steel tank. At what temperature in °C will the pressure in the tank be 1,383 torr?
39. ### chemistry

In a tank volume of 50 liters of gas contained oxygen at a temperature of 57º C and a pressure of 75 atm . What is the mass of the gas ?
40. ### chemistry

A sample of gas at 300 K has a volume of 2.0 liters. At what temperature will the volume decrease to 1.0 liter if the pressure is kept constant?
41. ### Chemistry

The heat of vaporization of water is 9.73 kcal/mol. At what pressure (in torr) would pure water boil at 89◦C?
42. ### chemistry

What are standard temperature and pressure? Why was a standard needed?
43. ### PHYSICS

A cylinder contains 0.1 cubic meters of gas at atmospheric pressure. This gas is allowed to expand until its pressure drops to 7800 Pa. What is the gas volume after this expansion has taken place?
44. ### trig

Suppose that Magnus' blood pressure can be modeled by the following function {{{p(t)=83-18sin(71pi*t)}}} Magnus' blood pressure increases each time his heart beats, and it decreases as his heart rests in between beats. In this equation, p(t)is the blood pressure in mmHg (...
45. ### CHEM HELP

The partial pressure of water above a solution of water and a nonvolatile solute at 25oC is 19.2 mm Hg. What is the mole fraction of the solute please help....I really don't know how I am supposed to solve this question. I know that Partial pressure of the solvent above a soln...
46. ### physics

An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If, instead, the expansion...
47. ### physics

An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If, instead, the expansion...
48. ### physics

An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If, instead, the expansion...
49. ### physics,plz.....give me answer as soon as possible

a pond of water filled with water apto 60m. 1)write formulato find the pressure of water exerted on the base of pond. 2)calculate the pressure exerted by the water on the base of pond?density of water is 1000kg/m3 3)half of the water was removed from the pond.what could be the...
50. ### chemistry

What volume (mL) of sulfur dioxide can be produced by the complete reaction of 3.82 g of calcium sulfite with excess HCl, when the final SO2 pressure is 827 torr at 44 degrees celsius?
51. ### Chemistry

Consider the following chemical equation. SO2(g) + O2(g) → SO3(g) What volume of sulfur dioxide gas reacts with 37.5 L of O2? The reaction conditions are 875°C and 1.00 atm pressure.
52. ### Chemistry

Put the following solutions in order of increasing vapor pressure. Explain your reasoning. .060 m K2CO3 .030 m LiC2H3O2 .120 m C2H6O2 (a non-electrolyte)
53. ### Chemistry

Factors that would affect re-crystallization? *Temperature *Heating Rate *Pressure *Dust or hair that causes nucleation * Time (slow cooling) This is what I have, are there anymore? Thank you
54. ### Chemistry

What volume (in ml) of carbon dioxide will form if 19.3 ml of O2 are reacted acccording to the following balanced equation: 2CO(g) + O2(g) --> 2CO2(g) Assume an excess of CO and that all are at the same temperature and pressure.
55. ### chemistry

What happens to the concentration of HI(g) when the total pressure on the equilibrium reaction 2HCl(g) + I2(s) <--> 2HI(g) + Cl2(g) is increased (by compression)? 1. increases 2. Unable to determine 3. decreases 4. remains the same
56. ### chemistry

What happens to the concentration of NO(g) when the total pressure on the equilibrium reaction 3NO2(g) + H2O <---> 2HNO3(aq) + NO(g) is increased (by compression)? 1. increases 2. remains the same 3. decreases 4. Unable to determine
57. ### Chemistry!!!!!!

a compound is analysed and found to have the atomic composition of C 54.5454% H 9.0909 % o 36.3636%. at a temp. of 120C and a pressure of 608 mm the density is 2.183 g/L. what is its molecular formula.
58. ### chemistry

which of the following is not spontaneous process at 25 degrees celsius and 1 atm pressure? ice melting iron rusting salt dissolving steam condensing water boiling
59. ### Chemistry

If a sample of gas is cooled at a constant pressure until it shrinks to one-fourth its initial volume, what change in its kelvin temperature must have occurred?
60. ### Chemistry

if 24.0 L of O2 burns completely a sample of carbon disulfide, how many grams of sulfur dioxide will be produced at 15 degrees celcius at a pressure of 1.3 atm? CS2 + 3O2 -> CO2 + 2 SO2
61. ### Chemistry

if 24.0 L of O2 burns completely a sample of carbon disulfide, how many grams of sulfur dioxide will be produced at 15 degrees celcius at a pressure of 1.3 atm? CS2 + 3O2 -> CO2 + 2 SO2
62. ### Chemistry urgent

2CH3OH(g)→2CH4(g)+O2(g)ΔH=+252.8kJ How many kilojoules of heat are released when 38.8g of CH4(g) reacts completely with O2(g) to form CH3OH(g) at constant pressure?
63. ### chemistry

Assuming all gases are at the same temperature and pressure, how many milliliters of hydrogen gas must react to give 49.0mL of NH3? 3H2(g)+N2(g)→2NH3(g)
64. ### Miami trace

Chemistry. AN UNKNOwn gas has a pressure of 2.0, a volume of 15.0 L and a temperature of 348 Kelvin. The sample weighs 4.20 grams. What is its molecular weight. I am trying to find formula
65. ### Chemistry

pure phosphene gas 3x10^-2 mol was placed in a 1.5L container. it was heated to 800K. at equilibrium the pressure of CO was found to be 0.497atm. calculate the Kp for the reaction: CO + Cl2 <---> COCl2
66. ### chemistry

19.4 g of butane (58.12 g/mol) undergoes combustion according to the following equation. What pressure of carbon dioxide in atm is produced at 309 K in a 1.15 L flask. 2 C4H10 (g) + 13 O2 (g) → 8 CO2 (g) + 10 H2O (g)
67. ### chemistry

Find the false statement(s) about the thermochemistry experiment in which nitric acid is reacted with sodium hydroxide, and the enthalpy of the reaction is measured using an ice calorimeter. i. Regardless of which strong acid and strong base are used for the neutralization ...
68. ### chemistry

when pressure decreases what happens with the boiling point, it decreases, increases or stays the same? I read the book (the example used is water) were it says that if vapor pressure is less than the pressure pushing down on the surface the bubbles formed collapse; but when ...
69. ### Chemistry

A 40.0 g sample of zinc is allowed to react with excess hydrochloric acid. How many liters of dry hydrogen gas are produced if the gas is collected over water at 23.0 degrees celsius and 1.234 atm of pressure? (Vapor pressure of water at 23.0 degrees celsius is 21.0 mmHg) ...
70. ### Chemistry

Any help would be great on the below problems. I am not sure where to begin. How do I solve these? Do I use a formula? 1. You are asked to make 500.0 mL of a 4.5M solution of HCl, but the only HCl you have available to dilute is 18.0M. Describe how you would make the desired ...
71. ### Chemistry Combined Gas Law

Hi so im reviewing or our long test tomorrow on combined gas law and gay lussac's well here, combined gas law i find it (maybe ) confusing to do this one, because theres no right answers because it is a practice exercise.. what i know on combined gas law is that pressure is ...
72. ### Chemistry

A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6.97 x ...
73. ### 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 ...
74. ### Science

1> What 2 types of electromagnetic energy have wavelengths of 0.76 cm? 2> What is the pressure at a depth of 3000 km inside the Earth? 3> How many inches of mercury are equivalent to 974.5 millibars of air pressure? 4> Jupiter's period of revolution is how many ...
75. ### Chem

A .326L container holds 0.146g of Ne and an unknown amount of Ar at 30C and the total pressure is 627 mmHg. Calculate the moles of Ar present? (I have calculated temp 308K, pressure is 0.825 atm and moles of Ne are .007)
76. ### PHYSICS_URGENT

What is the pressure gradient (the drop of pressure per length unit) in a blood vessel with a volume flow rate of ÄV/Ät = 35 cm3/s and an inner diameter of 15 mm. Hint: the viscosity coefficient of blood in the specific case we study is çblood= 2.7 x 10-3 Ns/m2
77. ### compressor operations

We are operating a centrifugal compressor. The gas composition does not change during this excursion. While holding suction pressure and flowrate constant, the inlet temperature rises. What would you expect to happen to the discharge pressure, and why
78. ### Thermodynamics

Consider an ancient, rigid, but sealed jar resting 80 ft below the surface of the ocean. If the specific gravity of sea water is 1.025 and the barometric pressure is 14.7psia, determine the absolute pressure acting on the jar (in psia).
79. ### Physics

7.7 mol of helium are in a 16 L cylinder. The pressure gauge on the cylinder reads 65psi. What are (a) the temperature of the gas in Celsius and (b) the average kinetic energy of a helium atom? p=65psi=4.481592E5 p=65psi=4.42atm n=7.7mol v=16=.016m^3 T = PV/(nR) = (4.42*.016...
80. ### Physics

A solar sail is used to propel a spacecraft. It uses the pressure (force per unit area) of sunlight instead of wind. Assume the sail and its spacecraft have a mass of 245 kg. If the sail has an area of 62,500 m2 and achieves a velocity of 8.93 m/s in 12.0 hours starting from ...
81. ### Angela

What kind of air is above water during land breeze (high pressure or low pressure) What kind of air is above land during land breeze? (high pressure or low pressure)
82. ### Physics

The modern Boeing 747 passenger jet airplane cruises at a speed up to 900 km/hr, at an altitude of 11,000 m. The cabin pressure is maintained equivalent to the atmospheric pressure at an altitude of 2,000 m. This is called the "cabin altitude". The pressure as a function of ...
83. ### Chem

A Kilogram was originally defined as the mass of ___________. The kilogram was originally defined as the mass of one litre of pure water at standard atmospheric pressure and at the temperature at which water has its maximum density (3.98 degrees Celsius). This definition was ...
84. ### chemistry

I was asked to bring something into class with a pressure less than 1.0 atm, after researching i found out that if I heated a bottle it will shrink and therefore this bottle will have the needed pressure. the problem is that after I put the bottle inside the microwave for 1 or...
85. ### Chemistry

An increase in the average kinetic energy of a sample of copper atoms occurs with an increase in a- Concentration b- Pressure c- Volume d- Temperature
86. ### chemistry

An increase in the average kinetic energy of a sample of copper atoms occurs with an increase in a. concentration b. pressure c. volume d. temperautre
87. ### Chemistry

sample of methane gas at 250K and 1.5atm has a volume of 3.0L. the temp change is 350K and volume is increased to 6.0L. what is the new pressure?
88. ### Chemistry

Would the R (PV=nRT)value go up or down if you had not corrected the gas for partial pressure of water? I was thinking down but im not sure
89. ### chemistry

a 500.0 mL gas sample at STP is compressed to a volume of 300.0 ml and the temperature is increased to 35.0 C. What is the new pressure of the gas in pascals?
90. ### Chemistry

To what Celsius temperature must 44.0 mm Hg of methane gas at 89.0°C be changed so the pressure will be 83.0 mm Hg? Assume the volume and the amount of gas are held constant.
91. ### Chemistry

To what Celsius temperature must 44.5 mL of methane gas at 43.0°C be changed so the volume will be 63.0 mL? Assume the pressure and the amount of gas are held constant.
92. ### Chemistry

If 0.896g of a gas occupies a 250mL flask at 20 degree celcius and 760 mmHg of pressure, what is the molar mass of the gas?
93. ### Chemistry

Convert a gas pressure of 485 cmHg to atmospheres. (cm not mm!)Wouldn't you simple convert cm to mm (4850) and divide by 760 mmHg?
94. ### Chemistry

If a sample of 23.0 L of NH3 gas at 10 degrees C is heated at constant pressure until it fills a volume of 50.0 L. What is the new temperature in degrees C?
95. ### Chemistry

the difference between the boiling point and the freezing point of pure water at standard pressure is (1)32 K (2)273 K (3)100 K (4)373 K
96. ### Chemistry

the difference between the boiling point and the freezing point of pure water at standard pressure is (1)32 K (2)273 K (3)100 K (4)373 K
97. ### Chemistry

Determine the pressure in a 125-L tank containing 56.2 kg of oxygen gas at 25 °C. So, PV=nRT I convert 25 °C to 298.15 K Do I have to convert anything else? What else do I do?
98. ### Chemistry

Given that KH for CO gas at 25 OC is 9.71 x10-4 mol.L-1.atm-1. Calculate the mass of CO that would dissolve in 1.00 L of H2O if the partial pressure of CO is 1.38 atm.
99. ### chemistry

a liquid has an enthalpy of vaporization of 30.8 kg.mol. at 273 K it has a vapor pressure of 102 mmHg. What is the normal boiling point of this liquid
100. ### chemistry

a liquid has an enthalpy of vaporization of 30.8 kg.mol. at 273 K it has a vapor pressure of 102 mmHg. What is the normal boiling point of this liquid