# osmotic pressure chemistry

10,971 results, page 66
1. ## chemistry

555 mL sample of nitrous oxide at 25 degree celsius is heated to 50 degrees celsius. If the pressure remains constant, what is the final volume?

asked by Anonymous on July 19, 2011
2. ## chemistry

The normal boiling point of acetone is 56.2 (degrees)C and the molar heat of vaporization is 32.0 kj/mol. At what temperature will acetone boil under a pressure of 50.0 mmHg?

asked by Jim on June 21, 2010
3. ## chemistry

A sample of oxygen that occupies 1.00x10^6 mL at 575 mm Hg is subjected to a pressure of 1.36 atm. What will the final volume of the sample be if the temperature is held constant?

asked by peyton on February 27, 2013
4. ## 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. I have already tried T1V1=T2V2

asked by Megan on May 2, 2010
5. ## Physics

A monatomic ideal gas expands from 1.00m^3 to 2.50m^3 st a constant pressure of 2.00x10^5 Pa. Find the change in the internal energy of the gas.

asked by S on November 22, 2012
6. ## Physics

A man of mass 75 kg lies on a bed of 10,000 nails. The tip of each nail has an area of 1.0 square millimeter. What pressure does the man experience? [g=10 N/kg]

asked by Erin on April 12, 2014
7. ## chemistry

155.0 grams of N2 (nitrogen gas) are put in a 4.50L container at 35C. What is the pressure? PV=nRT n=155/molmassN2 Convert temps to K.

asked by TIFFANY on January 9, 2007
8. ## Chem

A bicycle pump inflates a tire whose volume is 577 mL until the internal pressure is 627 kPa at a temperature of 21.7°C. How many moles of air does the tire contain?

asked by Sam on December 18, 2014
9. ## chemistry

a 0.25-g sample of a liquid was vaporized at 100 degree celcius. The vapor occupied 125 ml under a pressure of 0.96 atm. What is the molecular weight of the liquid?

asked by Tam on February 22, 2012
10. ## chem

A gas occupying 10 mL at standard conditions is heated to 10◦C while the pressure is reduced to 0.92114 atm. What is the new volume occupied by the gas? Answer in units of mL

asked by a on May 31, 2014
11. ## ap chem

: 1.0 L of an unknown gas was allowed to effuse through a small opening under constant pressure conditionssuppose you have two 1-liter flasks, one containing n2 at STP, the other containing CH4 at STP

asked by davy on February 16, 2012
12. ## chem

A reaction yields 0.00704 mol of O2 gas. What volume will the gas occupy if it is collected at 16.0◦C and 0.767 atm pressure? Answer in units of mL

asked by reis on May 31, 2014
13. ## Physics

A monatomic ideal gas expands from 1.00m^3 to 2.50m^3 st a constant pressure of 2.00x10^5 Pa. Find the change in the internal energy of the gas.

asked by A on November 23, 2012
14. ## Chemistry 103

2NiO(s)→2Ni(s)+O2(g) If O2 is collected over water at 40.0C and a total pressure of 739mmHg , what volume of gas will be collected for the complete reaction of 24.18g of NiO?

asked by YeJi Lee on October 23, 2012
15. ## problem

Benzene has a heat of vaporization of 30.72 kj/mol and a normal boiling point of 80.1. At what temperature does benzene boil when the external pressure is 480 torr?

asked by Anonymous on July 18, 2011
16. ## Chemistry

Consider the following chemical equation. Cl2(g) + O2(g) → Cl2O3(g) Assuming all gases are at the same temperature and pressure, how many milliliters of oxygen gas must react to give 3.50 L of Cl2O3?

asked by Kalen on December 6, 2010
17. ## Chem

A 500 -cm3 flask contains 0.420g of a gas at a pressure of 160kPa and a temperature of 330K. What is the molecular mass of this gas? M=____g/mol? Ty

18. ## chemistry

A helium balloon has a volume of 2.50L at STP. If it's released and rised to an elevation at which pressure is 0.285 atm, and the temperature is -35 degrees. What's the new volume?

asked by sarah on January 16, 2012
19. ## science

an elephant of mass 500kg stands with all four feet on the ground. each foot has an area of 0.08m^2.calculate the pressure exerted on the ground.[g=10m/s^2]

asked by kwame on October 17, 2014
20. ## Physics

A monatomic ideal gas expands from 1.00m^3 to 2.50m^3 st a constant pressure of 2.00x10^5 Pa. Find the change in the internal energy of the gas.

asked by A on November 23, 2012
21. ## ap chemistry

A sample of gas occupies 4 mL at STP. At what pressure would this sample occupy 500 mL if the temperature is changed to 525C? Answer in units of torr

asked by cheri on February 10, 2013
22. ## chemistry

If a scuba diver's lungs have a normal capacity of 4.9 L at sea level (1.0 atm), what would be the volume of her lungs if the pressure at a depth of 50 ft is 975 mmHg?

asked by Leeya on April 9, 2014
23. ## Earth's Dynamic Atmosphere

What is the mainstream unit of measuring air pressure? A. Inches of mercury B. PSI C. Pounds per square foot D. Centimeters of mercury my answer is a.

asked by Prisila on December 26, 2017
24. ## Calsius-Clapeyron Equation

The vapour pressure of methyl alcohol is 40 mmHg at 5°C. Use this value and the calsius-clapeyron equation to estimate the normal boiling point of mythl alcohol.

asked by need help on February 6, 2009
25. ## Chemistry

Consider the decomposition of barium carbonate: BaCO3(s)= BaO(s) + CO2(g). Using data from Appendix C in the textbook, calculate the equilibrium pressure of CO2 at 298K.

asked by Jona on March 31, 2013
26. ## Chemistry

Calculate the change in entropy (in J/K) when 61.4 g of nitrogen gas is heated at a constant pressure of 1.50 atm from 25.8 ºC to 92.8 ºC. (The molar specific heats are Cv is 20.8 J/(mol-K) and Cp is 29.1 J/(mol-K) .)

asked by June on March 31, 2015
27. ## chemistry

What is the volume occupied by 0.118 mol of helium gas at a pressure of 0.97atm and a temperature of 32 degrees celius? R=0.0821 L atm/mol K

asked by Tracey on April 18, 2010
28. ## chem

A sample of nitrogen gas (N2) kept in a container of volume 13.3 L and at a temperature of 22.3°C exerts a pressure of 1.1 atm. Calculate the number of grams of gas present.

asked by nicole on October 17, 2010
29. ## Chemistry

N2(g) + O2(g) → N2O5(g) What volume of oxygen gas reacts to yield 750.0 cm3 of N2O5? The reaction conditions are 350°C and 2.50 atm pressure

asked by Harry on February 2, 2014
30. ## Physics

2. The average atmospheric pressure at sea level is approximately 101 000 Pa. If the density of air at 0◦C is approximately 1.3 kg , how high does the atmosphere extend?

asked by Merdreik on October 31, 2016
31. ## Chem II/College

Using the Clausius Clapeyron equation determine the vapor pressure of water at 50.0 degrees C. The molar heat of vaporization of water is 40.7 kJ/mol. How do you solve this?

asked by Bianca on October 7, 2012
32. ## physics

Use R = 8.2 × 10–5 m3 atm/mol K and NA = 6.02 × 1023 mol–1. The approximate number of air molecules in a 1 m3 volume at room temperature (300 K) and atomospheric pressure is:

asked by sam on June 24, 2009
33. ## science

Urea forms a ideal solution in water. Determine the vapour pressure in an aqua solution containing 10 percent bymass at 40degree Celsius

asked by priya on October 27, 2016
34. ## Chemistry

what volume of oxygen gas measured at 25C and 760 torr is required to react with 1.0L of methane measured under the same conditions of temperature and pressure?

asked by Mitch on March 24, 2012
35. ## chemistry

Which part(s) of the reaction 2O3(g) 3O2(g) will be favored by an increase in the total pressure (resulting in compression)? 2. Neither is favored. 3. Unable to determine 4. reactants

in a piston is locked in place and the cylinder is placed in a boiling water, the temperature, pressure, internal energy are all increase if a piston is being pushed inward, would it have the same answer as above

asked by bme1 on May 26, 2010
37. ## literature

i have to write a persuasive essay on obesity, can you just name some problems or diseases that most obese people have: like i know diabetes is one blood pressure (high?) heart problems.... what else?

asked by literature on March 18, 2009
38. ## physics

I have a Pressure in atm and a volume in liters how do i find the temperature in kelvins?? I know the formula pv=nRT works...but i don't know the number of moles so... I don't know what to do.

asked by Katy on May 5, 2010
39. ## science

(a) What is the name of weather systems centered about regions of low pressure? (b) In what direction do winds in the northern hemisphere spiral around such a region? (c) In the southern hemisphere?

asked by Shirley on October 30, 2011
40. ## Physics

A cyclist and his bicycle have a combined mass of 55kg. Total area of the tyres in contact with the road is 2.2 in contact with pressure exerted by the two on the ground.

asked by Angie on February 15, 2017
41. ## CHEMISTRY

Method for getting correct answer? Thank you! Initially there were equilibrium concentrations of 0.1887 M A, 0.1042 M B. Which of the equations below is correct if the pressure decreased by a factor of 2.40? Use the reaction below. 6A(g) ↔ 5 B(g) Qc =

asked by Chemistry on April 6, 2014
42. ## chemistry

c2h4(g) + 3O2(g) -> 2 CO2 (g) + 2 H2O (g) What volume of oxygen will react with 18 ml of ehtylene, c2h4, assuming that the gases are present at the same temperature and pressure?

asked by Monica on April 19, 2010
43. ## CHEMISTRY

Method for getting correct answer? Thank you! Initially there were equilibrium concentrations of 0.1887 M A, 0.1042 M B. Which of the equations below is correct if the pressure decreased by a factor of 2.40? Use the reaction below. 6A(g) ↔ 5 B(g) a. Qc =

asked by Chemistry on April 6, 2014
44. ## College Physics

The four tires of an automobile are inflated to a gauge pressure of 2.0x10^5 Pa. Each tire has an area of 0.024m^2 in contact with the ground. Determine the weight of the automobile.

asked by Samantha on October 17, 2010
45. ## chemistry

What is the vapor pressure of CS2(in mmHg) at 18.5degree C? Carbon disulfide, CS2, has Pvap= 100mm at -5.1 degree C and change in Hvap = 28.0 kj/mol .

asked by Lauren on January 26, 2010
46. ## Physics

I hope someone can help me, cause i am so confused. Pressure gradient-why can't submarines go to the bottem of the ocean? please help! Stop the multiple posts. I am a volunteer, and it is a waste of time to go through the same posts.

asked by Georgia on May 7, 2007
47. ## Physics

A car of four tyres of area 0.06m2 are in contact with the road. Calculate the maximum pressure exerted by each tyre if the car weighs 1200N.

asked by Mercy on October 25, 2018
48. ## chemistry

Calculate the partial pressure (in atm) of propane in a mixture that contains equal weights of propane (C3H8) and butane (C4H10) at 18°C and 746 mmHg

asked by Anonymous on November 21, 2011
49. ## chemistry

A sample of nitrogen gas has the temperature drop from 250°C to 150°C at constant pressure. What is the final volume if the initial volume is 310 mL?

asked by pari on July 30, 2014
50. ## Chemistry

An ideal gas confined in a cylinder by a movable piston at 25°C and 150 KPa is heated at constant pressure to 38°C. The Cp of the gas is (7/2)R. Calculate: AH, AU, Q and W in J/mol

asked by Anonymous on September 30, 2018
51. ## chemistry

A chemical reaction produced a 0.311 g sample of gas which occupied 225 mL at 55 C exerting a pressure of 886 mm Hg. What is the molar mass of the gas?

asked by JScholz on August 4, 2013
52. ## chemistry

the pressure exerted on a 240.ml sample of hydrogen gas at constant temerature is increased from 0.428 to 0.724.What will the final volume of the sample be?

asked by shubreet on October 21, 2010
53. ## chemistry

A bacterial culture isolated from sewage produced 35.5 mL of methane, CH4, at 31oC and 1 atm. What is the volume of this methane at standard temperature and pressure?

asked by Anonymous on April 18, 2012
54. ## Science

Under which conditions are clouds formed from ice crystals? A.strong winds B.high altitude (MY ANSWER) C.low humidity D.high pressure

asked by LOVE on January 28, 2016
55. ## chemistry

A chemical reaction produced a 0.311 g sample of gas which occupied 225 mL at 55 C exerting a pressure of 886 mm Hg. What is the molar mass of the gas?

asked by JScholz on August 4, 2013
56. ## Chemistry

A sample of nitrogen gas (N2) kept in a container of volume 11.7 L and at a temperature of 23.3°C exerts a pressure of 2.6 atm. Calculate the number of grams of gas present.

asked by Sven on October 17, 2011
57. ## Chem

What is the volume occupied by 24.4 g of argon gas at a pressure of 1.31 atm and a temperature of 464 K? n=24.4g P=1.31atm T=464 Find V i tried working it out and i got 7091.98 and is inncorrect can i get some help?

asked by Amy on October 15, 2010
58. ## physics

A submarine is constructed so that it can safely withstand a pressure of 1.6 x 107 Pa. How deep may this submarine descend in the ocean if the average density of seawater is 1025 kg/m3.

asked by Jimmy on December 13, 2009
59. ## Chemistry

Under constamt-pressure conditions a sample of hydrogen gas initially at 93 degress celcius and 8.1 L is cooled until its final volume is 1.7 L. What is the final temperature?

asked by Amanda on June 20, 2010
60. ## Chemistry

A good vacuum pump on Earth can produce a vacuum with a pressure as low as 1.96 × 10-8 torr. How many molecules are present in each milliliter at a temperature of 23.0ºC?

asked by Hunter on October 28, 2016
61. ## Physics

0.490 mol of argon gas is admitted to an evacuated 50.0 cm^3 container at 60.0 C. The gas then undergoes an isochoric heating to a temperature of 400 C. What is the pressure?

asked by Joe on January 27, 2011
62. ## physics

When water freezes, it expands about 8.60%. What would be the pressure increase inside your automobile engine block if the water in it froze? The bulk modulus of ice is 2.00 * 10^9 N/m2.

asked by Anonymous on January 31, 2013
63. ## Chemistry

What pressure (in atmospheres) will be exerted by 1.3 moles of gas in a 13 litre flask at 22 degrees Celcius? (Gas constant (R) = 0.0821 L atm K^-1 mol^-1)

asked by Anonymous on May 18, 2014
64. ## science question

please check i think its B or D. Under which conditions are clouds formed from ice crystals? A.strong winds B.high altiude C.low humidity D.high pressure

asked by matt on May 15, 2014
65. ## chem

why would it be dangerous to heat a liquid in a distillation apparatus that had no vent or opening to the laboratory? - is this because the liquid will create vapor pressure and could cause a serious injury to a student?

asked by Jason on November 3, 2008
66. ## chemistry

As the temperature of a gaseous substance is decreased at constant pressure, it will undergo a series of physical changes. Which is the correct sequence of physical states that will be encountered?

asked by erica on January 20, 2012
67. ## Chemistry

KClO3 decomposes according to the reaction below. How many grams of KClO3 are needed to produce 826ml of O2 at standard temperature and pressure? 2KClO3 → 2KCl + 3O2

asked by Sarah on April 22, 2017
68. ## Chemistry

Benzene has a heat of vaporization of 30.72kJ/mol and a normal boiling point of 80.1 ∘C. At what temperature does benzene boil when the external pressure is 480torr ?

asked by Connor on April 7, 2014
69. ## chemistry

A weather balloon is filled with 0.295 m3 of helium on the ground at 18 °C and 756 torr. What will the volume of the balloon be at an altitude of 10 km where the temperature is 48 °C and the pressure is 0.14 atm?

asked by jun on November 5, 2014
70. ## Chemistry

Which of the following reactions will result in a reduced total pressure? a. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) c. 2HI(g) → H2(g) + I2(g) b. 2N2O(g) → 2N2(g) + O2(g) d. 2H2(g) + O2(g) → 2H2O()

asked by Brittany on November 6, 2012
71. ## chemistry

what volume of hydrogen sulfide is produced by reaction of 0.5 mole of sodium sulfide with hydrochloric acid at a temp. of 20C and a pressure of 722 mm.

asked by Kimberly on April 13, 2012
72. ## Chem

A sample of gas of mass 2.929 g occupies a volume of 426 mL at 0degree Cel and 1.00 atm pressure. What is the molecular weight of the gas? Thanks!

asked by Peter on March 9, 2010
73. ## thermodynamic

Calculate the work necessary to compress air in an isolated cylinder with initial and final volumes of 6.0 and 1.2 ft^3, respectively. The initial pressure and temperature are 30.0 psia and 50 degree F, respectively.

asked by chris on January 16, 2011
74. ## Exam

Hello I have exams coming up and I was wondering if any of you guys know where I can get some practice exam papers or questions that I can do or download from the internet. I am in year 11, high school, and I have exam on geometry and trigonometry, intro

asked by Jarin on May 14, 2007
75. ## Chemistry

We have been getting numerous questions like this on assignments and I can't figure them out. Its like I know that there some way connected but I can't figure it out. This is for Chemistry in highschool and its likea review and so they are not going over

asked by Tracy on September 17, 2006
76. ## science

Consider the following reaction: CH3X + Y --> CH3Y + X At 25ºC, the following two experiments were run, yielding the following data: Experiment 1: [Y]0 = 3.0 M [CH3X] Time (hr) 7.08 x 10-3 M 1.0 4.52 x 10-3 M 1.5 2.23 x 10-3 M 2.3 4.76 x 10-4 M 4.0 8.44 x

asked by Mariel on February 21, 2012
77. ## logic-math

Calculate the truth value (f or V) a. Is it true that if (the Papaya is a fruit from the Caricaseas or the Pitahaya is the fruit of a plat from the Cactaseas) then (el Cohombro is a fruit of a plant from the family of the Cucurbitaceas or the Nisper is a

asked by JuanPro on March 20, 2014
78. ## logic and math

Calculate the truth value (f or V) a. Is it true that if (the Papaya is a fruit from the Caricaseas or the Pitahaya is the fruit of a plat from the Cactaseas) then (el Cohombro is a fruit of a plant from the family of the Cucurbitaceas or the Nisper is a

asked by JuanPro on March 28, 2014
79. ## Chemistry

1.) A closed 5.00 L container is filled with a mixture of 4.00 moles of hydrogen gas, 8.00 moles of oxygen, 12.0 moles of helium, and 6.00 moles of nitrogen. What is the pressure in this container at a temperature of 25 °C? 2.) A closed 5.00 L container

asked by Sunny on April 25, 2016
80. ## Physics difficult... chris help again plz.

A heat engine has the three step cycle shown above. Starting from point A, 1 L (liter) of ideal gas expands in the isobaric (constant pressure) process A to B at P = 2 atm. B to C is isovolumetric process at V = 5 L, and C to A is an isothermal (constant

asked by Jason on May 8, 2010
81. ## Physics

A heat engine has the three step cycle shown above. Starting from point A, 1 L (liter) of ideal gas expands in the isobaric (constant pressure) process A to B at P = 2 atm. B to C is isovolumetric process at V = 5 L, and C to A is an isothermal (constant

asked by Jason on May 8, 2010
82. ## Algebra 1 (Reiny)

1. It takes Dustin 2 hours to shovel the snow from his driveway and sidewalk. It takes his sister 3 hours to shovel the same area. How long will it take them to shovel the walk if they work together? A: Working together, Dustin and his sister can shovel

asked by Victoria on June 3, 2014
83. ## Chemistry

1. The atmosphere of earth is an example of what kind of solution? A. liquid-liquid B. gas-liquid C. gas-gas*** D. solid liquid 2. Which of the following will result in a greater amount of oxygen dissolving in water? A. Heat the water*** B. Decrease the

asked by Hartley on April 17, 2017
84. ## English

I urgently need your help to translate this school profile into English. Thank you. I included another sentence, too. 1) Students aged between sixteen and eighteen can opt for the bilingual branch (??) and study subject like Geographie/Earth Science,

asked by Henry2 on October 20, 2011
85. ## MATH

The volume V of a gas varies inversely as pressure P is exerted. If V = 4 liters when P = 3 atmospheres, find V when P = 7 atmospheres. Note: Round your answer to the nearest hundredth

asked by NICKY on October 12, 2010
86. ## Chemistry

a 5.00 Liter tank holds argon gas a 675 kPa and 11C. what would be its pressure if this argon is transferred to a different tanks whose volume is 17.0 liters at 135C?

asked by Hunter on January 12, 2011
87. ## chemistry

A gas sample occupies a volume of 400.0ml at 298.15k at costant pressure. what is the final temperature when the volume occupied decreased by 39.0

asked by Anonymous on February 5, 2015
88. ## Chemistry

When 6.0L of H2 reacts with 2.0L of N2, 4.0L of gaseous product are formed. All volumes of gases are measured at the same temperature and pressure. What is the formula of the product? Hint: Assume all reactants are consumed.

asked by Cat on February 21, 2016
89. ## chemistry

an ideal gas at 75.0 c and 760 .mm hg is contained in a flexible vessel. Its volume is doubled and the pressure remains.unchanged .determine the temperature of the gas as a consequence of these changes

asked by devin boutte on August 26, 2011
90. ## Chemistry (Gas Laws) I REALLY NEED HELP

A 27.8 liter container is initially evacuated, and then 8.8 grams of water is placed in it. After a time, all the water evaporates, and the temperature is 130.8 degrees C. Find the final pressure.

asked by Christina on May 10, 2011
91. ## chemistry

A hot-air balloon has a volume of 970 L at 28 degrees C . To what temperature must it be heated to raise its volume to 1200 L , assuming the pressure remains constant?

asked by Anonymous on April 24, 2012
92. ## saviour preparatory school

An elephant of mass 500kg stands with all feet on the ground. each foot has an area of 0.08m calculate the pressure exerted onthe ground (g 10ms)

asked by frimpong on July 14, 2015
93. ## Physics

A rectangular fish tank measuring 0.80m × 0.55m is filled with water to a height of 61cm . Part A What is the gauge pressure on the bottom of the tank?

asked by Help! final next weel on December 3, 2013
94. ## Chemistry

The combustion of ethane: 2 C2H6 (g) + 7 O2 (g) ---> 4 CO2 (g) + 6 H2O (g) At the same temperature and pressure, what is the maximum volume in liters of carbon dioxide that can be obtained from 15.9 L of ethane and 52.3 L of oxygen?

asked by Helpless on November 6, 2012
95. ## Chemistry

A certain substance has a heat of vaporation 56.21 kj/mol. At what kelvin temperature will the vapor pressure be 6.50 times higher than it was at 361k? I need help in setting the problem: I got 56.21/8.3145j/mol.k(1/T1-1/T2)?

asked by Josh on July 9, 2011
96. ## Chemistry

A mixture of gases collected over water at 14C has a total pressure of 1.198 atm and occupies 72 mL. How many grams of water escaped into the vapor phase?

asked by Megan on October 15, 2010
97. ## Chemistry

Given the reaction NH3(g) + O2(g)--> NO(g) + energy, in what direction will the reaction shift if you: a)remove O2 (g) b)increase the pressure by decreasing the volume c)decrease the temperature d)add a catalyst

asked by Arianna on April 9, 2012
98. ## chemistry

Carbon disulfide,CS2, is a volatile, flammable liquid. It has a vapor pressure of 426.6 mmHg at 29.8C and 760.0 mmHg at 46.5C. What is the heat of vaporization of this substance?

asked by patty on January 17, 2011
99. ## Physics

A sample of a monatomic ideal gas is originally at 20 °C. Calculate its final temperature of the gas if the pressure is doubled and volume is reduced to one-fourth its initial value.

asked by nbi on October 15, 2013
100. ## Physics

A sample of a monatomic ideal gas is originally at 20 °C. Calculate its final temperature of the gas if the pressure is doubled and volume is reduced to one-fourth its initial value.

asked by Anon on October 15, 2013