# osmotic pressure chemistry

10,993 results, page 2
1. ## CHEMISTRY

the osmotic pressure of blood at 37 degrees is 7.56atm. what mass of glucose should be dissolved per litre of solution for an intravenous injection to be isotonic with blood?

asked by lulu on October 14, 2010
2. ## CHEMISTRY

the osmotic pressure of blood at 37 degrees is 7.56atm. what mass of glucose should be dissolved per litre of solution for an intravenous injection to be isotonic with blood?

asked by lulu on October 14, 2010
3. ## statistics

At a certain college, 15% of the students receieved an A in their required math cousre, 10% receieved an A in their required chemistry course, and 5% receieved an A in both. A student is selected at random. a.) What is the probability that he received an A

asked by Sharon on October 4, 2009
4. ## Calculate Osmotic Pressure

69.7 grams of a solute with a molecular mass of 2790 grams are dissolved in enough water to make 1.00 dm3 of solution at 20 degrees C. What is the osmotic pressure of the soluton?

asked by Jose Reyes on December 7, 2010
5. ## Chemistry

a solution of 4.65 of a carbohydrate in 100.0g of water has a density of 1.016g/mL and an osmotic pressure of 3.18 atm at 20.0 degrees celcius. calculate the molar mass of the carbohydrate.

asked by Amy on February 16, 2011
6. ## Chemistry

What is the density of an aqueous solution of potassiu nitrate that has normal boiling point of 103 celsius and an osmotic pressure of 122 atm at 25 celsius?

asked by Anmol on February 20, 2010
7. ## chemistry

find the average molar mass of polyethylene when 4.40 g of the polymer is dissolved in benzene to produce 200.0 mL of solution and the osmotic pressure is found to be7.60 torr ant 25 celcious Degree.

asked by Anonymous on April 2, 2012
8. ## chemistry

High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The pressures used in this procedure range from around 500 kilopascals (500,000 Pa ) to about 60,000 kPa (60,000,000 Pa ). It is often

asked by dakota on March 18, 2015
9. ## Chemistry

High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The pressures used in this procedure range from around 500 kilopascals (500,000 Pa ) to about 60,000 kPa (60,000,000 Pa ). It is often

asked by dakota on March 11, 2015
10. ## Chem

This is also from the lab concerning activity serious of metals and calculation of electrode portentions... Question: What are the standard conditions for measuring potentials? Does that mean... Standard condition for temp: 298K Concentration: 1 molar

asked by Marisol on March 29, 2007
11. ## Chemistry

What mass of sucrose (C12H22O11) would you combine with 5.28 102 g of water to make a solution with an osmotic pressure of 9.14 atm at 298 K? (Assume a density of 1.0 g/mL for the solution.) I came up with 67.5 but no luck...help please!!

asked by Anonymous on July 3, 2012
12. ## ap chemistry

a solution is prepared by dissolving 4.9 g C12H22 O11 (nonelectrolyte) in 175 grams of water. calculate the freezing poitn and osmotic pressure (25C) of this solution.

asked by yeng on January 7, 2015
13. ## chemistry

With respect to Boyle's law (lab experiment with textbooks on an apparatus), if in the classroom the air pressure in the classroom is equal to 2.4 textbooks, how does one find the total pressure of a book with the volume of 26? Am I on the right track by

asked by Rosie829 on April 4, 2011
14. ## Chemistry

Nitric oxide (NO) reacts with molecular oxygen as follows: 2NO(g) + O2(g) ¨ 2NO2(g) Initially NO and O2 are separated as shown below. When the valve is opened, the reaction quickly goes to completion. Determine what gases remain at the end of the

asked by Sarah on November 1, 2010
15. ## Chemistry

A solution is prepared by dissolving 35g hoemoglobin in water to make 1 litter. If osmotic pressure of solution is 10.00mmHg at 25 degree centigrade. Calculate the molarmass of the hoem6globin

asked by Shuhudaht on June 11, 2015
16. ## General Chemistry

how many grams of a protein weighing 4500 grams/ mol must be present in 100 ml of water solution to a given osmotic pressure of 18 mm hg at 25 degrees celcius...( use formula of pie = Mrt

asked by Sarah on December 12, 2010
17. ## Chemistry

A 271-mL of a sugar solution containing 1.79g of the sugar has an osmotic pressure of 30.1 mmHg at 35.1 degrees C. What is the molar maas of the sugar?

asked by John on October 18, 2010
18. ## Chemistry

Intravenous medications are often administered in 7% glucose (C6H12O6). what is the osmotic pressure of such solutions at 44 degrees C (body temperture)? the density of the solution is 1 g/mol. I would convert the percent concentration to Molarity. (Broken

asked by Camden on February 11, 2007
19. ## chemistry

A solution is prepared by dissolving 49.0 g of glucose (C6H12O6) in 225.0 g of water. The density of the resulting solution is 1.23 g/mL. Determine the osmotic pressure (in Pa) of this solution at 25.0 oC.

asked by G-Unit 32 on February 10, 2010
20. ## Biology

What is the osmotic pressure of the salt solution in reverse-osmosis? Select one: a. An equilibrium state where the amount of solvent passing in opposite directions is equal b. An equilibrium state where the amount of solvent passing in one direction is

asked by Clara on May 21, 2015
21. ## chemistry

pepsin is an enzyme involved in the process of digestion. its molar mass is about 3.50 x 10^-4 g/mol. what is thr osmotic pressure in mm Hg at 30 degree oC of a 0.400g sample of pepsin in 55.0mL of an aqueous solution?

asked by mickey on August 26, 2014
22. ## Chemistry

What osmotic pressure in atmospheres would you expect for a solution of 0.150M CaCl2 that is separated from pure water by a semipermeable membrane at 310 K? Assume 100% dissociation for CaCl2 Any help is appreciated, thank you!

asked by Joe on September 21, 2014
23. ## chemistry

Hi you guys please help me with my chemistry homework, i need to find all these items and take them to my class in a ziploc bag *a hydrocarbon with a molecular mass greater than 100g/mol *2 porpanol *an aromatic compound(not the common usage of "aromatic"

asked by desperate on February 5, 2007
24. ## chemistry

A dilute aqueous solution of CaCl2 contains 0.159 grams of solute per liter of solution. It is fully dissociated. What is the osmotic pressure of the solution against a membrane at 20.0 °C?

asked by sarah on September 29, 2011
25. ## Chemistry

A flask of known volume was filled with air to a pressure of 3.6atm. This flask was then attached to an evacuated flask of known volume and the air was allowed to expand into the flask. The final pressure of the air (in both flasks) was 2.7atm and the

asked by Scott on August 27, 2016
26. ## Chemistry

1. If an aqueous solution that is 0.15 M in HF has an osmotic pressure of 3.9 atm at 25oC, what is the percent ionization of HF at this concentration? 2. A mixture of 2 volatile liquids is said to be ideal if each component obeys Raoult’s Law: Pi=XiPio

asked by Michelle on February 5, 2015
27. ## chemistryyyy

A solution is made by dissolving 0.0100 mol of HF in enough water to make 1.00 L of solution. At 23 °C, the osmotic pressure of the solution is 0.308 atm. What is the percent ionization of this acid? Please help.

asked by Jake on February 19, 2012
28. ## Chemistry Science Project

I need some ideas for high school science projects. It doesnt really matter what field of science, but i would prefer chemistry, biology, or physics. Really Urgent! Thanks! What about a project on osmotic pressure. Put a salt solution inside a thistle

asked by Rachel on March 8, 2007
29. ## chemistry

I have a chemistry project where I need to make an object move using my knowledge of chemistry. The object os a small ball the size of a large marble. It must be moved using chemistry and NOT physics (ie slope wind etc). I am 15 and in grade 11.

asked by Didier on April 8, 2010
30. ## CHEMISTRY PLS HELP

If a sample of red blood cells at an osmotic pressure of 7.70 atm is placed in a solution that contains 0.050M calcium chloride (CaCl2) at 25°C, what is the freezing point of this solution if the density of the solution is 1.50 g/mL

asked by BYU on October 5, 2016
31. ## byu

If a sample of red blood cells at an osmotic pressure of 7.70 atm is placed in a solution that contains 0.050M calcium chloride (CaCl2) at 25°C, what is the freezing point of this solution if the density of the solution is 1.50 g/mL

asked by CHEMISTRY PLS HELP on October 5, 2016
32. ## chemistry

A solution prepared by adding 0.17 g of a polymer to 0.6 L of toluene (methylbenzene, a common solvent) showed an osmotic pressure of 0.808 Torr at 21â—¦C. What is the molar mass of the polymer? Answer in units of g/mol.

asked by Anonymous on November 27, 2017
33. ## chemistry

A 1.10- sample contains only glucose and sucrose . When the sample is dissolved in water to a total solution volume of 25.0 , the osmotic pressure of the solution is 3.78 at 298 .

asked by bf on January 25, 2010
34. ## Chemistry

an aqueous solution contains 1.00g/L of a derivative of detergent lauryl alcohol.the osmotic pressure of this solution at 25 °c is 2.0 x 10³ Nm-², what is the molar mass of the detergent.

asked by Eleanya on March 4, 2018
35. ## science

out of following solution which possesses lowest osmotic pressure,highest boiling point and highest frezzing point 1M KCl,1MNa3PO4 and 1M glucose.

asked by sunidhi on June 21, 2016
36. ## chemistry

osmotic pressure of a solution containing 7g of protein in 100ml of solution is 20mmhg at37celsius calculate molecular mass of the protein

asked by himanshu on January 29, 2014
37. ## Chemistry

An aqueous solution containing 10.50 g of a compound in 100.0 ml of solution has an osmotic pressure of 0.0187 atm. at 25°C. What is the molecular weight of the compound?

asked by Sean on March 31, 2013
38. ## Chemistry

My teacher gave us the answer to a chemistry problem and i cannot figure out how she got the answer. Can you help me work out this problem so i can better understand it. A gas under an initial pressure of 0.60atm is compressed at a constant temperature

asked by Steven on March 19, 2012
39. ## Chemistry

A protein has a molecular weight of 98,300 grams/ mole. What will be the osmotic pressure if 0.128 grams of this protein I dissolved in 15.0 ml of water at 20 degrees calcias?

40. ## physical chemistry

The freezing point of a sample of abnormal blood was found to be -0.402 degree celsius. Estimate its osmotic pressure at 37 degree celsius. Kf(water)=1.86

asked by yogita n sarki on January 24, 2011
41. ## chemistry

A solution containing 26.05 mg of an unknown protein per 23.5 mL solution was found to have an osmotic pressure of 3.75 torr at 44 C. What is the molar mass of the protein?

asked by M on January 25, 2010
42. ## Chemistry

A solution containing 26.40 mg of an unknown protein per 22.5 mL solution was found to have an osmotic pressure of 3.95 torr at 21 C. What is the molar mass of the protein?

asked by RE on September 17, 2009
43. ## chemistry

A solution contains 0.02755 g of a protein in 25.0 mL of solution. The osmotic pressure is 3.22 torr at 298 K. What is the molecular weight of the protein?

asked by m on February 17, 2013
44. ## chem

What is the density of an aqueous solution of potassium nitrate, that has a normal boiling point of 103.0 degrees Celsius, and an osmotic pressure of 122 at 25 degrees Celsius?

45. ## Chemistry

Calculate the osmotic pressure of a 6.0 × 10-2 M solution of NaCl at 20°C (293 K). Okay when I set up problem MRT....I get something totally different from the answer 2.9 atm. Could u please show me your set up to get to 2.9 atm? Thanks a billion!!

asked by Chemistry Chick on October 29, 2011
46. ## CHM 152

The freezing point of an aqueous solution of glucose was measured to be -1.52 oC. What is the osmotic pressure, in atm, of 100 mL of this solution at 25.0 oC? (Kf = 1.86 oC/m) When I calculated it out I got 16.79 atm but the answer was wrong don't know

asked by Car on June 11, 2010
47. ## college chem

What mass of sucrose should be combined with 524 g of water to make a solution with an osmotic pressure of 8.50 atm at 270 K? (Assume the density of the solution to be equal to the density of the solvent.)

asked by moe on September 13, 2010
48. ## chemistry

at a temperature of 5 celsius, 21.5 mg of a non electrolyte is dissolved in enough water to make a 150.0 ml solution. the osmotic pressure of the solution is 0.200 atm. what is the molar mass of the substance dissolved

asked by amelia on September 8, 2014
49. ## Science

A solution is prepared by dissolving 4.9 grams of sucrose in 17gram of water. At 25 degree Celsius find the boiling point, freezing point and osmotic pressure of this solution.

asked by Amara on December 19, 2018
50. ## chemistry

If 6.38 g of a polyethylene glycol is dissolved in 7550 ml of water at 300 oK, the solution has an osmotic pressure of 0.171 torr. Calculate the molar mass (g/mol) of the polyethylene glycol.

asked by eng on January 29, 2010
51. ## chemistry

What mass of sucrose should be combined with 491 g of water to make a solution with an osmotic pressure of 8.70 atm at 270 K? (Assume the density of the solution to be equal to the density of the solvent.)

asked by ashley on August 5, 2010
52. ## CHEMISTRY

Which of the following solutions do they have the maximum osmotic pressure : 1) 0.1 m ( molal conc.) glucose 2) 0.1 m sucrose 3) 0.5 m glucose 4) 0.2 m sucrose and why ?

53. ## Chemistry

The osmotic pressure of solution containing 4 g of the solute per litre of the solution is 0.41 atm at 27. What is the molecular weight of the solute?

asked by Evans on August 13, 2018
54. ## chemistry

why is the osmotic pressure of 10 mole solution sodium chloride larger than that of sodium nitrate solution

asked by taher on May 24, 2010
55. ## Chemistry

What mass of sucrose (C12H22O11) should be combined with 477g of water to make a solution with an osmotic pressure of 8.15atm at 275K ? (Assume the density of the solution to be equal to the density of the solvent.)

asked by chemstud on February 8, 2015
56. ## chemistry

Phenylalanyl aspartate, Nutrasweet, is an artificial sweetener used in many diet drinks. If a solution prepared by dissolving 6.068 mg of Nutrasweet in 125 milliliters of water exhibited an osmotic pressure at 25ºC of 3.23 mm Hg, what is the molar mass of

asked by Laffy Taffy on March 11, 2012
57. ## chemistry

Cellobiose(a nonvolative, nonelectrolyte) is a sugar obtained by degratation of cellulose. If 200.mL of an aqueous solution containing 1.500g of cellobiose at 25C give rise to an osmotic pressure of 407.2mmHg. What is the molecular mass of Cellobiose?

asked by Anonymous on September 12, 2012
58. ## Chem AP

A 0.505-g sample of a compound is dissolved in enough water to form 100.0 mL of solution. This solution has an osmotic pressure of 2.56 atm at 25°C. If each molecule of the solute dissociates into two particles (in this solvent), what is the molar mass of

asked by Me on February 3, 2014
59. ## Choosing High School Courses

I want to major in something English or History related, probably Secondary Education, International Studies, or Journalism. I am currently enrolled in chemistry and I am doing horribly. Would colleges rather see me take chemistry and get a bad grade, or

asked by Corinne on February 23, 2009
60. ## Chemistry

In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 58.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 C when the reverse

asked by Tracy on February 19, 2012
61. ## chemistry

calculate the osmotic pressure of a solution obtained by mixing 100ml of 0.25M solution of urea and 100ml of 0.1m solution of cane sugar at 293k

asked by sumit on June 6, 2013
62. ## CHEMISTRY

1.Chemistry Question: A 0.1 M solution of acetic acid is titrated with 0.05M solution of NaOH. What is the pH when 60% of the acid has been neutralized? The equilibrium constant (Ka) for acetic acid is 1.8x10^-5 2. Chemistry question: On average, how far

asked by Gerald on August 21, 2010
63. ## Science

Which branches of science do pharmacists need knowledge of to do their job properly? A.physics and chemistry B.biology and chemistry C.chemistry and geology D.physics and computer science Is the answer B?

asked by Gwen on August 19, 2014
64. ## Chemistry

An aqueous salt solution has a freezing point of -.5 degrees Celsius and causes neither swelling or shriveling of cells. The kf of water is 1.86 K kg/mol. What is the osmotic pressure that is exerted on cells when placed in pure water? (ignore differences

asked by Anonymous on February 15, 2014
65. ## Chem

When 0.10 g of insulin is dissolved in 0.200 L of water, the osmotic pressure is 2.30 Torr at 20°C. What is the molar mass of insulin? I tried using the van't hoff equation, converting Torr into atm; but not sure how to do it. my teacher didn't really

asked by Mark on February 16, 2010
66. ## Chemistry: Freezing point

An aqueous solution is prepared by dissolving 1.08 g of human serum albumin, a protein obtained from blood plasma, in 50.0 mL of water. The solution has an osmotic pressure of 0.00770 atm at 298 K. What is the molar mass of the albumin? Answer: 6.86 x 10^4

asked by JJ on February 25, 2013
67. ## 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.

asked by Gerald on April 15, 2012
68. ## statistics

At a certain college, 15% of the students received an A in their required math course, 10% received an A in their required Chemistry course, 5% received an A in both. A student is selected at random. a.) What is the probability tha he receieved an A in

asked by Sharon on October 2, 2009
69. ## statistics

At a certain college, 15% of the students received an A in their required math course, 10% receieved an A in their required chemistry course, and 5% received an A in both. A student is selected at random. a.) What is the probability that he received an A

asked by Sharon on October 3, 2009
70. ## chemistry

Arginine vasopressin is a pituitary hormone. It helps regulate the amount of water in the blood by reducing the flow of urine from the kidneys. An aqueous solution containing 21.6 mg of vasopressinin 100.0 mL of solution has an osmotic pressure at 25 ¢ªC

asked by george on April 15, 2013
71. ## ecc

Arginine vasopressin is a pituitary hormone. It helps regulate the amount of water in the blood by reducing the flow of urine from the kidneys. An aqueous solution containing 21.6 mg of vasopressinin 100.0 mL of solution has an osmotic pressure at 25 ¢ªC

asked by george on April 15, 2013
72. ## Chem II

What is the boiling point of an aqueous solution of a non electrolyte that has an osmotic pressure of 10.50atm at 25 degrees C? Kb of water is 0.52 degrees C/m. Assume the density of the solution is the same as that of pure water.

asked by Ken on June 7, 2008
73. ## chemistry

1.00 of an aqueous solution contains 1.52g of a compound used in antifreeze. If the osmotic pressure of this solution at 20.0 degree C is 448 torr, calculate the molar mass of the antifreeze compound

asked by courtney on April 28, 2014
74. ## Chemistry

An aqueous solution of a compound with a very high molar mass was prepared in a concentration of 82.7 g·L-1 at 25 °C. Its osmotic pressure was 0.540 ·102 Pa. Calculate the molar mass of the compound. Cheers

asked by David on April 28, 2010
75. ## Chem

why is an understanding of chemistry important in biology? All digestion, nutrition, muscle usage/reactions, cell division/reproduction, and all of the enzymatic processes at work in the body are chemisty. Even eyesight is a chemical reaction. So you need

asked by Samantha on June 18, 2006
76. ## Chemistry

A solution is prepared by dissolving 5.00g of an unknown molecular solid in water to make 500 ml of solution. The osmotic pressure of the solution is 1.61 atm at 25 degrees C. What is the molar mass of the solute? This is what ive done so far: M=

asked by James on September 8, 2010
77. ## Chemistry

An aqueous solution is composed of 7.50 g NaCl (MM = 58.44 g/mol) diluted to 0.100 L. Calculate the osmotic pressure of the solution at 298 K a. 5.83 atm b. 9.22 atm c. 18.3 atm d. 62.8 atm

asked by Kat on February 6, 2016
78. ## Chemistry

When treating a patients physicians use an isotonic means that this solution will have the same osmotic pressure as the body fluid such as blood. how many grams of glucose (C6H12O6) is in 100.0 g of H2O in the isotonic glucose solution (5.00% m/m)?

asked by Tina on December 10, 2014
79. ## chemistry

472 mL of H2 gas was collected over water when 1.256 g of Zn reacted with excess HCl. The atmospheric pressure during the experiment was 754 mm Hg and the temperature was 26 degrees C. A. Write the balanced chemical equation (I have this) Zn + HCl --->

asked by Jeremiah on November 19, 2012
80. ## chemistry

A solution containing 29.00 mg of an unknown protein per 22.0 mL solution was found to have an osmotic pressure of 3.10 torr at 18 ∘C. What is the molar mass of the protein? (3.10 torr* 22mL)=.682 I do not know what to do next

asked by mmp on February 29, 2016
81. ## Chemistry 2

In a study designed to prepare new gasoline resistant coatings, a polymer chemist dissolves 6.053g of poly in enough water to make 100.0 mL of solution. At 25C, the osmotic pressure of this solution is 0.272 atm. What is the molar mass of the polymer

asked by Mike on March 26, 2010
82. ## Chemistry

Assuming that sea water is a 3.5 wt % solution of NaCl in water, calculate its osmotic pressure at 20°C. The density of a 3.5% NaCl solution at 20°C is 1.023 g/mL.

asked by Bob on April 13, 2010
83. ## chemsitry

How will the osmotic pressure of an aqueous solution change as evaporation occurs? does it even change? or does it increase? evaporation will increase concentration, correct?

asked by sam on May 1, 2007
84. ## Chemistry

Suppose you have to prepare 1.00 L of the solution ( KH2PO4 and Na2HPO4 pH=7.31) and that this solution must be isotonic with blood (have the same osmotic pressure as blood). What mass of KH2PO4 would you use?

asked by Pepz on March 16, 2013
85. ## Math

If you pass general chemistry, then you can take organic chemistry. You pass general chemistry. ˆ You can take organic chemistry. Let P = you pass general chemistry Let Q = you can take organic chemistry I came up with P - >Q P therefore Q But my set up

86. ## Chemistry

A protein subunit from an enzyme is part of a research study and needs to be characterized. A total of 0.135g of this subunit was dissolved in enough water to produce 2.00 mL of solution. At 28 ∘C the osmotic pressure produced by the solution was 0.138

asked by Al on June 27, 2014
87. ## chemistry

The osmotic pressure of a solution containing 5.00 mg of an unknown protein per 10 mL of solution was 2.73 torr at 25 °C. Find the molar mass of the unknown protein.

asked by lily on September 11, 2011
88. ## chemistry

1. If a gaseous sample contains 73% N2 by volume, what is the solubility of N2 in water at 25°C and 1.0 atm (kH in H2O at 25°C = 7.0 10-4 mol/Latm)? 2. Calculate the vapor pressure of a solution of 0.60 mol of cholesterol in 4.5 mol of toluene at 32°C.

asked by Ashley on January 31, 2011
89. ## Chemistry

A saturated solution is made by dissolving 0.325 g of a polypeptide (a substance formed by joining together in a chainlike fashion some number of amino acids) in water to give 1.37 L of solution. The solution has an osmotic pressure of 4.13 torr at 28 °C.

asked by Luke on July 14, 2014
90. ## chemistry urgent

hydrogen gas is collected in a bottle, and the pressure of the gas is 892 torr at 24 °C. what is the pressure of hydrogen gas when the temperature decreases to 20 °C? chemistry - DrBob222, Tuesday, November 30, 2010 at 1:25pm (P1/T1) = (P2/T2) Dear Dr

asked by Lynn on November 30, 2010
91. ## chemistry

Two containers of equal volume are separated by a membrane that allows free passage of water but completely restricts passae of solute molecules. Into which compartment will water flow, or will there be no net movement of water? Which solution is at the

asked by rena on August 8, 2013
92. ## chemistry

Two containers of equal volume are separated by a membrane that allows free passage of water but completely restricts passae of solute molecules. Into which compartment will water flow, or will there be no net movement of water? Which solution is at the

asked by rena on August 8, 2013
93. ## Chemistry

I am confused about why this is the answer to a practice problem I was given. (answer is c). Could someone explain why/why not for each answer? 2) Solution A is made from 1 L of water and 0.1 moles of Na(CH3COO), and Solution B is made from 1 L of water

asked by Trixie on March 8, 2010
94. ## Chemistry

Here is my question and I,m hoping I worked the problem out correctly. A 10-g mass of krypton occupies 15.0 L at a pressure of 210 kPa. Find the volume of the krypton when the pressure is increased to 790 kPa. V2 = V1 x P1/P2 V2 = 15.0 L x 210 kPa/790 kPa

asked by Amy on May 8, 2012
95. ## chemistry

a 250.0 ml sample of an aqueous solution at 25 degrees celsius contains 35.8 mg of an unknown nonelectrolyte compound. If the solution has an osmotic pressure of 11.25 mmHg, what is the molar mass of the unknown compound? I know you need to have the answer

asked by Vic on October 1, 2012
96. ## Chemistry - Science (Dr. Bob222)

Liquid chloroform (CHCl3) is placed in a closed container and allowed to equilibrate with chloroform vapor. With the temperature held constant, additional chloroform is introduced into the system, and the vapor-liquid equilibrium is reestablished.

asked by Ana on May 10, 2014
97. ## Gen Chem

A mixture of NaCl and sucrose (C12H22O11) of combined mass 10.2 g is dissolved in enough water to make up a 250 mL solution. The osmotic pressure of the solution is 8.29 atm at 23°C. Calculate the mass percent of NaCl in the mixture.

asked by Brittany on February 4, 2016
98. ## 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

asked by corey on December 1, 2015
99. ## Chemistry

Which of the solutions has the greatest osmotic pressure? Choose one answer. a. 10.0 g glucose in 1.00 L at 298 K b. 10.0 g glucose in 1.00 L at 303 K c. 10.0 g glucose in 0.500 L at 298 K d. 5.0 g glucose in 1.00 L at 298 K

asked by CC on February 12, 2010
100. ## Chem Two

When 2.25 g of a nonelectrolyte solute is dissolved in 125 mL of water at 22 °C, the resulting solution exerts an osmotic pressure of 955 torr. What is the molar concentration of the solution? How many moles of solute are in the solution? What is the

asked by Jen on July 14, 2012