# osmotic pressure chemistry

10,993 results, page 96
1. ## Chemistry

At a certain temperature, the solubility of gas in water at 2.04 is 48.0 . Calculate the solubility of gas in water, at the same temperature, if the partial pressure of gas over the solution is increased from 2.04 to 6.00 .

asked by Sam on February 8, 2013
2. ## chemistry

I have two Chemistry related questions that were in my AP Chem summer packet. The first has to do with Stoichiometry. It says, "Calculate the number of moles, molecules, and atoms in 60.0 g of boron triflouride. I calculated that there are .885 moles, and

asked by kelly on August 28, 2006
3. ## College Biology

A 21-year old brother of a person with insulin-dependent diabetes mellitus experienced increased urination and thirst for 6 weeks, along with a 15 pound weight losss, despitre a normal appetite. Fearing that these symptoms meant he also had developed

asked by Anonymous on October 27, 2010
4. ## chem

Forty miles above the earth's surface the temperature is 250 K and the pressure is only 0.20 mm Hg. What is the density of air (in grams per liter) at this altitude? (Assume the molar mass of air is 28.96 g/mol.) PV=nRT n/V= molar desity= P/RT mass

asked by Helpme on March 30, 2007
5. ## Chemistry

Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s. There was one problem I had no idea how to solve. What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve to make a

asked by Maggie on April 12, 2010
6. ## English

I've got a few sentence here, but I always get confused whether to use affect or effect. Can you help me out? 1. Furthermore, Lee and Hosseini illustrate the affect that the experiences their protagonists encounter during childhood have upon the characters

asked by TP on June 4, 2008
7. ## Thermodynamics

Consider a system consisting of 2.0 mol Carbon dioxide gas, inititially at 25 deg and 10 atm and confined to a cylinder of cross section 10.0square centimeters. lt is allowed to expand adiabatically against an external pressure of 1.0atm until the piston

asked by R. Kanukamwe on June 6, 2015
8. ## medical coding

This patient was admitted for treatment of a traumatic left second metatarsal fracture. The fracture site was opened and reduced, followed by placement of tree internal Kirshner wires. Two pins were then placed, and an external fixatror frame was connected

asked by Ace234 on October 16, 2013
9. ## science

1. the molar mass of helium is 4.00 g/mol. calculate the volume of 1 mol of helium at STP (T = 273, P = 1 atm) what is the density of helium at STP? 2. the density of an ideal gas is 1.35 kg/m^3. if the temperature is Kelvin and the pressure are both

asked by billystar on April 24, 2008
10. ## chemistry

A particular air sample at 1 atm pressure has a density of approximately 1.3 g/liter and contains SO2 at a concentration of 25 µg/m3 . What is this concentration in terms of: a) Parts per million (mass SO2 per 106 units mass of air) b) Moles SO2 per 106

asked by Mensah on October 16, 2015
11. ## HELLO I NEED HELP AND NOBODY EVER HELPS ME.

1. the molar mass of helium is 4.00 g/mol. calculate the volume of 1 mol of helium at STP (T = 273, P = 1 atm) what is the density of helium at STP? 2. the density of an ideal gas is 1.35 kg/m^3. if the temperature is Kelvin and the pressure are both

asked by billystar on April 24, 2008
12. ## Chemistry

If 6.0 liters of methane react with 12.0 liters of oxygen according to the equation CH4 + 2O2 → CO2 + 2H2O, and the temperature and the pressure are kept constant, which of the following is true? a. All the methane and oxygen react. b. Oxygen is in

asked by Helen on September 22, 2012
13. ## Chemistry

A student performed an experiment to determine the molecular weight of a gaseous compound. Using the ideal gas law PV = nRT, and knowing the pressure, temperature, and volume of the vapor, the student calculated the number of moles of gas, n, to be 0.0443

asked by Ericka on November 15, 2015
14. ## Chemistry..Please Help

HENRY'S LAW I did the first one im not sure how to do the 2 and the 3rd question. 1. What is the Henry's law constant for CO2 at 20{C}? C=kP K=c/p = 3.70*10^-2/1.00atm= 0.037 2. What pressure is required to achieve a CO2 concentration of 6.00×10−2 at

asked by Saira on May 29, 2009
15. ## chem

A sample of H2(g) expands adiabatically and reversibly from a state 1 where p1 = 200000Pa,V1 = 0.002m3 and T1 = 300K to a state 2 where V2 = 0.004m3.Assume the gas to behave as an ideal gas calculate the final temperature and its pressure.Use the constant

asked by kelvin on November 9, 2016
16. ## Physics

Collapsible plastic bags are used in hospitals for infusions. We want to use such a bag to infuse a electrolyte solution into the artery of a patient. For this we mount the bag at a height h above the arm of the patient. Assuming that the particular gauge

asked by Sam on November 26, 2009
17. ## physical science

imagine that you added helium gas to a partially inflated mylar ballon, and expanded as the gas was added. During this expansion process, do you think the pressure of the helium gas inside the ballon increased , decreased or remained fairly constant?

asked by ashlee on October 16, 2007
18. ## Math

The systolic blood pressures of a group of 18-year-old women are normally distributed with a mean of 120 mmHg and a standard deviation of 12 mmHg. What percentage of women in this group have a systolic blood pressure between 108 mmHg and 132 mmHg?

asked by Jacqueline on September 20, 2015
19. ## Chemistry

The equilibrium constant, Kp, equals 3.40 for the isomerization reaction: cis-2-butene trans-2-butene. If a flask initially contains 0.250 atm of cis-2-butene and 0.145 atm of trans-2-butene, what is the equilibrium pressure of each gas?

asked by Bob on December 2, 2014
20. ## math?

how do i figuire this problem out? .. A deep-sea diver must descend and ascend in short steps to equalize pressure on his body. If the diver rises toward the surface too fast, he may suffer from a physical condition called “the bends.” Suppose the

asked by matt on May 5, 2014
21. ## PHYSICS HELP PLEASE

A container is fitted with a movable piston of negligible mass and radius r = 0.061 m. Inside the container is liquid water in equilibrium with its vapor, as the drawing shows. The piston remains stationary with a 120-kg block on top of it. The air

asked by Anonymous on November 25, 2010
22. ## Physics

7.7mol of helium are in a 16L 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? Part A: so this is what i did T=PV/nR and C=T-273

asked by ana on November 20, 2009
23. ## physics

A bubble located 0.200m beneath the surface of a glass of beer rises to the top.the air pressure at the top of the glass is 1.01(10^5)pa.assume that the density of beer is the same as that of fresh water at 4 degrees celcius.if the temperature and number

asked by Neptoh on April 6, 2012
24. ## Physics

One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x

asked by Angel on October 7, 2010
25. ## Physics

One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x

asked by Angel on October 7, 2010
26. ## Physics

One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x

asked by Angel on October 7, 2010
27. ## Physics

One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x

asked by Andrea on October 6, 2010
28. ## Physics

An empty rubber balloon has a mass of 0.0120 kg. The balloon is filled with helium at 0 degrees celsuis, 1 atm pressure, and a density of 0.179kg/m^3. The filled balloon has a radius of .5m a)What is the magnitude of the net force acting on the balloon? b)

asked by Sara Draz on May 18, 2016
29. ## Physics

An empty rubber balloon has a mass of 0.012kg. the balloon is filled with helium at 0 degrees celcius, 1 atm pressure, and a density of 0.179 kg/m3. the filled balloon has a radius of 0.5 m. a)what is the magnitude of the buoyant force acting on the

asked by Taylor on March 5, 2010
30. ## Organic chemistry

Limone (MW 136g/mol) is a pleasant smelling liquid found in lemon and orange peels. The boiling point of limonene is 175 ˚C, but it co-distills with water at 97.5 ˚C. If the vapour pressure of water at 97.5˚C is 690 mmHg, what percent (by mass) of the

asked by Laura on March 9, 2016
31. ## chemistry

When nitroglycerin (C3H5N3O9) explodes, it decomposes into the following gases: CO2, N2, NO, and H2O. If 239g of nitroglycerin explodes, what volume will the mixture of gaseous produces occupy at 1.00 atm pressure and 2678oC? a. Write a balanced equation

asked by Suzanne on April 27, 2014
32. ## Physics

Each of the space shuttle's main engines is fed liquid hydrogen by a high-pressure pump. Turbine blades inside the pump rotate at 635 rev/s. A point on one of the blades traces out a circle with a radius of 0.021 m as the blade rotates. (a) What is the

asked by Jackson Kerr on October 2, 2012
33. ## chemistry

The first step in the process used to recover zinc metal from zinc sulfide ore is the reaction of zinc sulfide with oxygen gas to produce zinc oxide and sulfur dioxide. 2 ZnS(s) + 3 O2(g) → 2 ZnO(s) + 2 SO2(g) When the external pressure is 142700 Pa and

asked by windal on April 25, 2016
34. ## Chemestry

A cylinder with a movable piston contains 2.00 of helium, , at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the volume

asked by Monica on October 3, 2009
35. ## CHEM

A cylinder with a movable piston contains 2.00 of helium, , at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the volume

asked by Kara on October 24, 2008
36. ## Chemistry

A vessel containing 39.5 cm3 of helium gas at 25°C and 106 kPa was inverted and placed in cold ethanol. As the gas contracted, ethanol was forced into the vessel to maintain the same pressure of helium. If this required 17.8 cm3 of ethanol, what was the

asked by flame on January 24, 2013
37. ## Chemistry

A vessel containing 39.5 cm3 of helium gas at 25°C and 106 kPa was inverted and placed in cold ethanol. As the gas contracted, ethanol was forced into the vessel to maintain the same pressure of helium. If this required 18.8 cm3 of ethanol, what was the

asked by Hannah on September 22, 2013
38. ## Chemistry

A vessel containing 39.5 cm3 of helium gas at 25°C and 106 kPa was inverted and placed in cold ethanol. As the gas contracted, ethanol was forced into the vessel to maintain the same pressure of helium. If this required 17.8 cm3 of ethanol, what was the

asked by jacfar on January 21, 2013
39. ## chemistry

A cylinder with a movable piston contains 2.00 g of helium, He, at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the

asked by sargun on September 29, 2017
40. ## science

Here are all the word you can use chemical property mixture heatcapasity homogeneous viscosity sublimitation physicalproperty compound chemicalformula substance density mass tempurature pressure heterogenerous A _________ property of matter describes its

asked by jacob on April 11, 2016
41. ## AP Physics

A Physics book has a height of 26 cm, a width of 22 cm, and a thickness of 4 cm. Find the pressure that the Physics book exerts on a desktop when the book lies face up and when the book is balanced on its spine. I know that P=F/A, I am just not sure which

asked by JL on November 15, 2009
42. ## Chemistry

If 0.433 mol of gaseous CS2 and 1.62 mol of gaseous H2 are reacted according to the balanced equation at 454 K and in a 40.0 L vessel, what partial pressure (atm) of gaseous CH4 is produced? CS2(g) + 4H2(g) -> CH4(g) + 2H2S(g) Molar Mass (g/mol) CS2 76.143

asked by Luc on April 11, 2010
43. ## Chem

Cyclopropane (C3H6) reacts to form propene (C3H6) in the gas phase. The reaction is first order in cylclopropane and has a rate constant of 5.87*10^-4 at 485degreesC. If a 2.5L reaction vessel initially contains 724 torr of cyclopropane at 485degreesC, how

asked by Bryan on February 24, 2011
44. ## Thermal physics

when breathing slowly a person inhales air at room temperature and exhales it at body temperature. We may assume that the lungs maintain ordinary atmospheric pressure as they expand. If a resting person inhales 0.6L of air at 24 degrees what volume does

asked by Kelly on June 24, 2010
45. ## science

How many litres of oxygen are needed to react completely with 25.0L of H2S at STP according to the following reaction: 2H2S + 3o2 --> 2so2 + 2H2O At STP temperature is 273 K pressure is 101.3 Kpa R is 8.314 so PV=nRT 101.3×25= n× 8.314× 273 n= 1.11 so

asked by fayza on January 19, 2015
46. ## Chemistry

The combustion of 0.0222g of isooctane vapor, C8H18(g), at constant pressure raises the temperature of a calorimeter 0.400 degrees C. The heat capacity of the calorimeter and water combined is 2.48kJ/degrees C. Find the molar heat of combustion of gaseous

asked by Heather on October 9, 2012
47. ## chemistry 11

Hi, I am stuck on a couple questions in chemistry 11. The questions are 1. Calculate the number of moles of the anhydrous salt left behind 2. Calculate the number of moles of water removed by heat from your sample of hydrate. 3. Calculate the moles of

asked by Daniel on November 22, 2009
48. ## Physics Urgent

A container of volume V = 103 cm3 has a mass of 30.0042 g when evacuated. When the container is filed with an unknown gas of pressure p = 4.72 atm at temperature T = 20oC, the mass of the system increases to 30.9508 g. Assuming that the unknown gas behaves

asked by Sydney on November 9, 2010
49. ## Physics Urgent

A container of volume V = 103 cm3 has a mass of 30.0042 g when evacuated. When the container is filed with an unknown gas of pressure p = 4.72 atm at temperature T = 20oC, the mass of the system increases to 30.9508 g. Assuming that the unknown gas behaves

asked by Sydney on November 9, 2010
50. ## Chemistry

a. How many moles of N2 are present in a 1.00 qt flask that has a pressure of 425 torr at a temperature of 35°C? What is the mass in this na2? It would be much simpler to change quart to liters first, then torr to kpa PV=nRT n= PV/RT Temps in Kelvins, V

asked by Chelsey on February 26, 2014
51. ## Physics

A cylinder with a moveable piston holds 2.60 mol of argon at a constant temperature of 295 K. As the gas is compressed isothermally, its pressure increases from 101 kPa to 149 kPa. (a) Find the final volume of the gas. Answer in m3 (b) Find the work done

asked by steve on April 15, 2011
52. ## Chemistry

Can someone walk me through how to work this I have no clue where to start. I have converted grams to moles and Celsius to kelvin but I don't know where to go from there. Thank you! A piece of dry ice (solid CO2, d = 0.900 g/mL) weighing 21.0 g is placed

asked by James on October 5, 2013
53. ## Physics sph 212

A person takes in a breath of 0 degrees celsius air and holds it until it warms to 37 degrees celsius. The air has an initial volume of 0.700L and a mass of 9.00*10^-4kg. Determine a. the work done by the air on the lungs if the pressure remains constant

asked by Tiera on April 6, 2012
54. ## Chemistry Help.......

State the Le Chatelier's principle and explain the following i) The effect that incresing the pressure will have on the eaualibrium yield of methanol ii) The effect of increasing the temperature will have on the equalibrium yeild of methanol iii) The

asked by Lacey on March 12, 2007
55. ## Chemistry

1.) A vapor volume of 1.17 L forms when a sample of liquid CH3CN absorbs 1.00 KJ of heat at its normal boiling point (81.1 C and 1 atm). What is the heat of vaporization in KJ per moles of CH3CN? 2.) The vapor pressure of water at 25 C is 23.76 torr. If a

asked by joseph on February 15, 2010
56. ## Biology

Which one of the following statements about sense receptors is true? A)Chemicals, light and pressure convert stimuli into electrical implses. B) Electrical impulses within the nerve pathways trigger an awareness of stimuli in the sensory receptors

asked by Rena on September 1, 2010
57. ## chemistry

A sample of argon of mass 10.4 g occupies 2100 ml at 30 oC . (i) Calculate the work done by the gas when it expands isothermally against a constant external pressure of 31.1kPa until its volume has increased by 483.1ml. (ii) Calculate the work done by the

asked by sand on January 11, 2012
58. ## Chemistry

A 10.8g sample of a gas has a volume of 5.25L at 25 degrees Celsius and 766mmHg. If 2.3g of the same gas is added to this constant 5.25L volume and the temperature raised to 68 degrees Celsius, what is the new gas pressure?

asked by Jen on January 19, 2011
59. ## chemistry

What volume of a oxygen at STP was collected? oxygen gas is collected over water at a temperaturee of 10 degrees C and a pressure 1.2 atm. The volume of gas plus water vapor collected is 293ml.

asked by dee on April 6, 2016
60. ## physics

pls.. help me with this i really need it.. pls. A gas in a cylinder expands from a volume of 0.110 m3 to 0.320 m3. Heat flows into the gas just rapidly enough to keep the pressure constant at 1.65 x 105 Pa during the expansion. The total heat added is 1.15

asked by acinad on June 23, 2014
61. ## PHYSICS

Water flowing out of a horizontal pipe emerges through a nozzle. The radius of the pipe is 1.5 cm, and the radius of the nozzle is 0.42 cm. The speed of the water in the pipe is 0.68 m/s. Treat the water as an ideal fluid, and determine the absolute

asked by Anonymous on November 18, 2015
62. ## Chem

If 4.0 grams of hydroven, 6.02 x 10^22 atoms of helium and 4.48 liters of argon, measured at STP are placed in a 2.0 liter flask, at 27 degrees C, what is the final pressure? Under controlled conditions the velocity of hydrogen molecules was found to be

asked by Anonymous on November 23, 2008
63. ## Chemistry

I need help with this problem A 0.75–L bottle is cleaned, dried, and closed in a room where the air is 22oC and 44% relative humidity (that is, the water vapour in the air is 0.44 of the equilibrium vapour pressure at 22oC). The bottle is brought outside

asked by xavier on December 9, 2012
64. ## chemistry

The kinetic theory of gases is based on a number postulates from which the equation P= 1/3× N/V×m×µ² is derived (P is the pressure of the gas, N the number of molecules in the container, m the mass of each molecule and µ² is the mean square speed).

asked by Taylor on December 26, 2013
65. ## physics

1kg of ice at 0C is placed in a container with 2kg of water at 65C. The container is in an atmospheric pressure that remains at 15C. There is a free exchange of energy between all items so that a final temperature of 15C is reached. Calculate the amount of

asked by Ezekiel on February 21, 2016
66. ## Chemistry

The vapor pressure of water above a sugar water solution at 25.0 degrees C is 21.4 mmHg. What is the mole fraction of sugar in the solution? (assume sugar is a non-electrolyte, non-volatile solute and the vp of pure water at 25 degrees C is 23.8 mmHg)

asked by Jake on February 4, 2008
67. ## Physics

An airplane wing is designed so that the speed of the air across the top of the wing is 274 m/s when the speed of the air below the wing is 193 m/s. The density of the air is 1.29 kg/m3. What is the lifting force on a wing of area 25.0 m2?

asked by Jay on December 9, 2011
68. ## Physical Science

1. boyle's law states that the volume of a gas is inversely proportional to its pressure if the? A) temperature and number of particles are consistent** B) temperature reaches absolute zero C) number of particles are doubled D) temperature and number of

asked by ? on September 7, 2017
69. ## chemistry

Equal masses of gaseous N2 and Ar are placed in separate flasks of equal volume at the same temperature. Tell whether each of the following statements is true or false. Briefly explain your answer in each case. (a) There are more molecules of N2 present

asked by Gabriela on March 30, 2007
70. ## Chemistry

A compound containing boron and hydrogen has been synthesized. You perform two experiments to determine the molecular formula of the compound. A 0.492 g sample of the compound is burned in pure oxygen to produce B2O3 and 0.540 g of water. In the second

asked by Anna on October 16, 2014
71. ## chemistry

(a) Certain alloys such as LaNi5 can store hydrogen at room temperature. A plate of LaNi5 containing no hydrogen is placed in a chamber filled with pure hydrogen and maintained at a constant pressure. At what depth from the surface will the concentration

asked by kiril on December 7, 2012
72. ## Alpha decay

Hi I am working on a question which discusses ununhexium atomic number 116 atom weight 292. This isotope undergoes 7 alpha decay reactions. I have calculated that after seven reactions the product would be 102 nobelium. I cannot understand how the atomic

asked by Atom ant on January 17, 2007
73. ## Chemistry

The compound CH3F has van der Waals constants a = 5.009 atm•L2 /mol 2 and b = 0.0562 L/mol. Using both the ideal gas law and van der Waals’s equation, calculate the pressure expected for 25 mol of CH3F gas in a 5.00-L container at 75 °C. no idea how

asked by Sarah on December 2, 2012
74. ## Physics

As its volume is doubled from an initial value of 0.088 m3, a sample of gas is held at a constant pressure of 3.4 × 104 Pa by heating. Then, while a constant volume is maintained, the gas is cooled back to its initial temperature. The work that the gas

asked by Kaley on June 21, 2012
75. ## college chemistry

Consider the following equation: 4 NH3(g) + 5 O2(g)= 4 NO(g) + 6 H2O(s) a) HOw many liters of oxygen are required to react with 205 L NH3? Both gases are STP. b)How many grams of water vapor can be produced from 25 L NH3 if both gases are STP? c) How many

asked by la fonda on April 29, 2014
76. ## physics

A hydraulic cylinder has to overcome a force of 12,600 pounds on the extend stroke and 9,375 pounds on the return stroke. The maximum system pressure available is 2200 PSIG. What is the smallest diameter cylinder required to overcome the load and what is

asked by emma on April 1, 2015
77. ## equilibrium III

what's Kp if Cl2CO was found to be 7.46% decomposed at 395'C when initial pressure is 7.60atm. Cl2CO -->

asked by christine on April 11, 2007
78. ## physics

At a nuclear power plant water at 8°c from a lake is used in a heat exchanger to condense spent steam at a temperature of 120°c,to water at 85°c before it is recycled to the reactor. If the cooling water returns to the lake at a temperature of 19°c,how

asked by Riana on April 1, 2013
79. ## PHYSICS help please!!!!!!!!!!

At a nuclear power plant water at 8°c from a lake is used in a heat exchanger to condense spent steam at a temperature of 120°c,to water at 85°c before it is recycled to the reactor. If the cooling water returns to the lake at a temperature of 19°c,how

asked by Riana on April 1, 2013
80. ## PHYSICS

At a nuclear power plant water at 8°c from a lake is used in a heat exchanger to condense spent steam at a temperature of 120°c,to water at 85°c before it is recycled to the reactor. If the cooling water returns to the lake at a temperature of 19°c,how

asked by Riana on April 1, 2013
81. ## chemistry/math

The density of air at ordinary atmospheric pressure and 25°C is 1.19 g/L. What is the mass, in kilograms, of the air in a room that measures 12.0 ft 12.5 ft 7.3 ft? i made ft^3 into Liters and got 8,346,211.799 then I made the grams into kilograms and set

asked by Hannah on August 19, 2012
82. ## physics

At a nuclear power plant water at 8°c from a lake is used in a heat exchanger to condense spent steam at a temperature of 120°c,to water at 85°c before it is recycled to the reactor. If the cooling water returns to the lake at a temperature of 19°c,how

asked by Riana on April 1, 2013
83. ## Chemistry

Question: A sample of Freon-12 (CF2Cl2) occupies 2.261 x 101 L at 337 K and 2.917 x 102 kPa. Find its volume (in L) at standard temperature and pressure (STP). Equation: p1v1/t1=p2v2/t2 My Work: (2.917 x 102 kPa)(2.261x101 L)/337K = (101.3 kpa)( x )/273 k

asked by Bradley on July 13, 2011
84. ## chemistry

a balloonist is preparing a trip in a helium balloon. the trip begins in early morning at a temp of 15 degrees Celcius. By mid afternoon, the temp has increased to 30 degrees C. assuming the pressure remains constant at 1.00 atm, for each mole of helium,

asked by Joan on March 20, 2011
85. ## science

Some say that the hot air balloons with which the Montgolfier brothers performed their first flight had a volume of 1700 cubic metres and could lift 780 kilograms (that includes the balloon, basket and payload). Assume that the balloon took off on a day

asked by sakthi on July 15, 2015
86. ## physics

Some say that the hot air balloons with which the Montgolfier brothers performed their first flight had a volume of 1700 cubic metres and could lift 780 kilograms (that includes the balloon, basket and payload). Assume that the balloon took off on a day

asked by Nick on March 27, 2014
87. ## chemistry

Consider the conditions listed in the table below. Gas Temperature Pressure H2 100 oC 1 atm CH4 100 oC 20 atm O2 373 K 1 atm CO2 373 K 10 atm Which describes the characteristics of these samples? I. All molecules have the same kinetic energy II. The

asked by ... on November 14, 2012
88. ## Social Studies

What was Truman's response when communism began spreading beyond the soviet-run eastern Europe? A. He made a plea to the united nations to adopt the policy of containment B. He sent in military to the soviet union to pressure them to contain communism C.

asked by 1020304050 on March 19, 2017
89. ## physics

Two chambers are filled with a fluid. The ceiling of chamber 1 is at the same level as the floor of chamber 2. The pressure at the floor of chamber 2 is 1.2 × 105 Pa. If the area of the ceiling of chamber 1 is 2.0 m2, what is the magnitude F of the force

asked by Tyler on February 8, 2017
90. ## Intro to Technology

a short article of 200 to 300 words in your notebook, including the following information: · What are some uses for CAD in business, industry, or education? · Name two software programs that you could learn to use to create a CAD project. · Describe one

asked by Eduardo Gonzalez on March 4, 2010
91. ## Thermodynamics

a rigid vessel of volume 1m(^3) contains steam at 20bar and 400 degrees Celcius. The vessel is cooled until the steam is just dry saturated. Calculate the mass of steam in the vessel, the final pressure of the steam and the heat rejected during the

asked by Claire on March 12, 2010
92. ## Chemistry-gases

Nitrogen dioxide reacts with water and oxygen in the atmosphere to produce acid rain. 4NO2(g) + 2H2O(g) + O2(g) = 4HNO3(g) Assuming that the temperature and the pressure remain constant, calculate the volume of air at 1 atm, 20 C, necessary to dilute the

asked by Rose Bud on March 2, 2012
93. ## PRE-CALC still stuck

Write the statement as a power function equation. Use k for constant of variation if one is not given. a. Charles's law states the volume V of an enclosed ideal gas at a constant pressure varies directly as the absolute temperature T. b. The volume V of a

asked by Muffy on October 18, 2009
94. ## Chemistry-gases

Nitrogen dioxide reacts with water and oxygen in the atmosphere to produce acid rain. 4NO2(g) + 2H2O(g) + O2(g) = 4HNO3(g) Assuming that the temperature and the pressure remain constant, calculate the volume of air at 1 atm, 20 C, necessary to dilute the

asked by Rose Bud on March 2, 2012
95. ## Pre Calc (question was never answered)

Write the statement as a power function equation. Use k for constant of variation if one is not given. a. Charles's law states the volume V of an enclosed ideal gas at a constant pressure varies directly as the absolute temperature T. b. The volume V of a

asked by Muffy on October 18, 2009
96. ## Pre-Calc

Write the statement as a power function equation. Use k for constant of variation if one is not given. a. Charles's law states the volume V of an enclosed ideal gas at a constant pressure varies directly as the absolute temperature T. b. The volume V of a

asked by Muffy on October 17, 2009
97. ## English

I still have a sentence on the listening comprehension for you to check. Thank you. 1) It fights for the release of people imprisoned for racism and political prisoners. 2) Its local groups operate by collecting information about prisoners, and then make

asked by Matthew on April 15, 2012
98. ## chem

The decomposition of ammonium hydrogen sulfide that is shown below is an endothermic process. NH4HS(s) reverse reaction arrow NH3(g) + H2S(g) A 6.1589 g sample of the solid is placed in an evacuated 4.000 L vessel at exactly 24°C. After equilibrium has

asked by Anonymous on February 10, 2010
99. ## Chemisty

An ideal gas with an initial volume of 96L, temperature of 277K, and 7.3mol is permitted to come to a second state with a volume of 450mL and a temperature of 203C. Show the calculation for the final number of moles of gas in the system.

asked by Kevin on April 11, 2016
100. ## Physics

An ideal gas in a moveable piston is allowed to reversibly expand by slowly heating at constant pressure. a. Derive the equation for the work done reversibly as a function of the initial and final temperatures.( i have used w=-nrtln(v final/v intial) i

asked by Carlos on March 1, 2017