osmotic pressure chemistry

10,971 results, page 80
  1. Science

    What weather would it be when: 1. A thunderstorm is developing spinning winds at it's center 2. A low-pressure center is over the Atlantic Ocean where the water temperature is above 27°C 3. Cold air is pushing warm air where the air is 2°C and the ground

    asked by Dhaulagiri on September 18, 2010
  2. Physics

    a) A microphone has an area of 5cm^2. It receives during a 4.0 s time period a sound energy of 2.0*10^-11 J. What is the intensity of the sound? b) using intensity from a) what is the variation in pressure in the sound wave, delta P ? Use T=293 K and

    asked by Dean on February 22, 2010
  3. Chemistry

    Could you please give me a discriptive answer and explain what each term means? I have a hard time understanding chemistry. Thanx q1 In a reaction between aqueous solutions of calcium chloride and sodium carbonate, a precipitate is formed. The experimental

    asked by Brittany Rusk on September 28, 2006
  4. Chemistry - v/v versus w/w

    Thanks a lot:) So just to confirm: normally for any chemical bought from manufacturer, if it is not stated, the % usually means v/v? Seems like for conc sulphuric acid, when it is stated 97% sulphuric acid, it means 97% w/w sulphuric acid? Thank you very

    asked by annie on September 20, 2010
  5. chemistry

    Can anyone help me with these Chemistry questions? I am trying to study for an upcoming test and its just not sinking in as well and I thought. This is Thermochem for a heads up: Suppose 33mL of 1.20M HCl is added to 42mL of a solution containing excess

    asked by Dina on December 4, 2009
  6. physics

    A package weighing 75 N is sitting on a coffee table. The package is cubic with edges of 10 cm. How much pressure does the package exert on the table?

    asked by josh on May 21, 2013
  7. Chemistry

    A 2.5 L sample of gas at 25 degrees Celsius is heated to 50 degrees celcius at constant pressure. What would the volume be at 50 degrees celcius?

    asked by Deana on March 27, 2012
  8. Chemistry

    Consider the evaporation of methanol at 25.0 C: CH3OH(l)--->CH3OH(g) Delta G= 4.3 kJ Find Delta G at 25.0 C under the following nonstandard conditions: Pressure of CH3OH= 15.0 mmHg.

    asked by Kyle on April 18, 2010
  9. chemistry

    If you collect hydrogen gas over water at a temperature of 85*C, what is the volume of just the water if the pressure of hydrogen is 1.23 atm and the grams of hydrogen was 2.6

    asked by brandie on May 6, 2014
  10. college chem

    At 750°C, the Kp for the reaction 2 CO + O2➞ 2 CO2 is 2.72 x 10^11. ( 2.72 times ten to the eleventh) At that temperature, CO and O2 are added to a constant volume vessel. The initial pressure of the CO is 2.00 atm, and that of the O2 is 1.50 atm.

    asked by josh on February 28, 2010
  11. 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 410 ? This is how I am solving this problem, ln(415/760)= (30720/8.314)*(1/80.1 - 1/T2) It is

    asked by Lost on January 26, 2009
  12. science

    Identify 2 everyday things affected by change in altitude. One I have as airplanes. boiling temperature of water. air pressure The type of plant growth would be another factor. Since the animal life depends on the plants, animals present at various

    asked by Ginevra on May 21, 2007
  13. chemistry

    2. Zinc metal reacts with HCL similarly to magnesium: Zn(s) + 2HCL(aq) = ZnCl2(aq) + H2(g). the H2 gas produced was collected over water at 25 degrees Celsius and had a volume of 7.80L at 0.980 atm. How many grams of Zn were consumed in the reaction?

    asked by preshi on May 2, 2012
  14. Chem

    What is the change in entropy when 6.03 mL of liquid benzene (C6H6, d = 0.879 g/mL) is combusted in the presence of 26.8 L of oxygen gas, measured at 298 K and 1 atm pressure? (R = 0.0821 L · atm/(K · mol)) 2C6H6(l) + 15O2(g) → 12CO2(g) + 6H2O(l);

    asked by Anonymous on April 10, 2015
  15. Physical Chemistry1

    One mole of an ideal monatomic gas at 300 K and 1 atm is compressed adiabatically by application of a constant external pressure of 25 atm until mechanical equiliibrium is achieved. Calculate the final temperature of the gas, as well as q, w, deltaU and

    asked by Amber on September 29, 2008
  16. physics

    Calculate the mass of nitrogen present in a volume of 3000 cm^3 if the temperature of the gas is 22 degrees Celsius and the absolute pressure is 2.00 * 10^-13 atm, a partial vacuum easily obtained in laboratories. The molar mass of nitrogen (N2) is 28

    asked by Jen on November 16, 2007
  17. chemistry

    What is the pressure in millimeters of mercury of 0.0115mol of helium gas with a volume of 211ml at a temperature of 25 degrees celsius? Ok so I've come up with many different answers but none are right. You convert the mL to L and the temperature to

    asked by claire on February 20, 2013
  18. chemistry

    1. the volume of an idea gas is 2.06L at standard temperature and pressure. Calculate the volume at 1.75 atm and 27CELCIUS. 2. Ethane, C2h6 has a molar heat of vaporization of 15kj/mole. How many kilojoules or energy are required to vaporize 5 g of ethane?

    asked by stephanie on December 2, 2009
  19. Chemistry

    At 298K and 1bar pressure, the density of water is 1.00 g/cm^3 , Cpm = and 75.3 J/Kmol. The change in volume with temperature is given by delta V = ViB(deltaT), where B, the coefficient of thermal expansion, is 2.07 * 10^-4 K^-1. If the temperature of 350g

    asked by Danielle on September 24, 2012
  20. chemistry 102

    The following decomposition reaction SO2Cl2-->SO2 + Cl2 was run in a laboratory. Following data collected: Time(s) Pressure SO2Cl2 (ATM) 0 1 2500 .947 5000 .895 7500 . 848 10000 .803 What is the overall order of reaction?

    asked by vika on September 18, 2011
  21. chemistry

    A saturated solution was formed when 4.48×10−2 L of argon, at a pressure of 1.0 atm and temperature of 25 C, was dissolved in 1.0 L of water. Calculate the Henry's law constant for argon in mol/atm. I got an answer of 1.4*10^-3, maybe my units are

    asked by RE on September 18, 2009
  22. Chemistry

    I live in an area of 1014 millibars barometric pressure and I have an imaginary balloon with 22 grams of CO2 and a temperature of 61 degrees Fahreheit. What is the volume of the gas in liters. I know to use the Ideal gas law but how do I convert millibars

    asked by Robert on April 22, 2010
  23. Statistics

    The mean of a distribution of 1000 individuals' blood pressure is 85. If this number were translated into a Z score it would be equal to +1 standard deviations. True or False? I know to calculate a Z score the formula is Z= (X-sub-i minus the mean)/

    asked by Jeff on February 11, 2014
  24. Chemistry

    How many liters of Carbon Dioxide are formed by burning 6011.0 grams of C3H7OH with excess of oxygen gas and is carried out at 20.00 degrees Celsius, and 1.150 atm of pressure. I know this needs PV=nRT but the burning and excess part is throwing me off.

    asked by Alicia on August 16, 2015
  25. chem

    In the formation of sulfur hexaflouride, does the reaction at constant pressure or volume proceed more spontaneously? I've done the calcs to show that at constant volume, it is slightly more spontaneous, but I can't seem to find a good reason why... it

    asked by xX_Supaman_Xx on January 28, 2008
  26. Chem-Help Please!!!

    a correction needs to be made to the calculations for real gases as compared to ideal gases. apply these corrections and calculate the real pressure expected for 5 mole of nitrogen in a 1.5L container at a temp. of 20C. Note: I tried to find right formula

    asked by Amanda on April 19, 2012
  27. chemical experiment

    If a 200-mm test tube is substituted for the gas buret in a Aluminum Analysis experiment ( collect H2 from the sample ,and measure its pressure and volume , then, find out its number of moles and Aluminum's percent in the sample) ,indicate the additional

    asked by lamis on October 4, 2011
  28. Health

    Why is it important to learn refusal skills? A) in order to understand how peer pressure works B) so you can feel accepted by others around you C) to avoid situations in which alcohol is present and remain alcohol free D) you will feel worse about yourself

    asked by Brooklyn on December 14, 2017
  29. physics

    The equation given is 2SO2(g)+O2(g)->2SO3(g), and if 224L/h of O2 (at standard temp and pressure) is consumed by the reaction, how much power is produced? I can't go further than P=Work/Time and Work=P times change in V I've tried 224x2-224x3/60^2 but

    asked by Sally on February 19, 2015
  30. AP Chemistry

    A 34.05 gram liquid sample of an unstable compound is deposited in a metal piston assembly that has a cylinder with a diameter of 20.0 cm. After the sample is added, the piston is placed in contact with the liquid and the piston vent is closed. This

    asked by Jack on September 27, 2012
  31. Chemistry

    -CORRECTION- N2 + O2 --> 2 NO change in heat (delta H)= 43.2 kcal based on the reaction, which statement is true? a) 43.2 kcal are consumed when 1.00g of O2 reacts b) 43.2 kcal are consumed when 1.00g of N2 reacts c) 43.2 kcal are consumed when 1.00g of NO

    asked by Katie Y. on November 2, 2009
  32. Chemistry

    Please let me know how I'm doing with the following chemistry problems. I appreciate your imput. Here's problem 1: A sample of Helium gas occupies a volume of 29.4mL AT 18deg.celcius. (a)Would the volume of this gas sample be doubled at 36deg.celcius?

    asked by Cliff on November 24, 2010
  33. English Pls Ms. Sue help me by checking my work

    Please replace the incorrect words with correct words in the following sentences using AP Style. There may be more than one error per sentence; all sentences contain at least one error. Use correct AP style, punctuation, grammar and spelling errors.) 11.

    asked by Mary 2 on June 10, 2013
  34. chem

    8.10-L container holds a mixture of two gases at 45 °C. The partial pressures of gas A and gas B, respectively, are 0.153 atm and 0.882 atm. If 0.110 mol a third gas is added with no change in volume or temperature, what will the total pressure become?

    asked by dinah on December 2, 2013
  35. chem

    A 9.80-L container holds a mixture of two gases at 39 °C. The partial pressures of gas A and gas B, respectively, are 0.426 atm and 0.832 atm. If 0.250 mol a third gas is added with no change in volume or temperature, what will the total pressure become?

    asked by dinah on December 1, 2013
  36. physics

    The gauge pressure in both tires of a bicycle is 720 kPa. If the bicycle and the rider have a combined mass of 87.0 kg, what is the area of contact of each tire with the ground? (Assume that each tire supports half the total weight of the bicycle.)

    asked by Anonymous on January 23, 2013
  37. chemistry

    A 7.30-L container holds a mixture of two gases at 45 °C. The partial pressures of gas A and gas B, respectively, are 0.410 atm and 0.620 atm. If 0.150 mol of a third gas is added with no change in volume or temperature, what will the total pressure

    asked by grace on February 5, 2016
  38. Chem Home Work Help!

    I am a bit confuse with a question from a home work that I need to do by today please help! HW question... 1) A sample of neon gas occupies 8.77 L at 20°C. What is the pressure, in atmospheres, exerted by 1.45 mol of this gas? When you've gotten the

    asked by Sujeil on April 29, 2008
  39. Chemistry

    at 25C and 795 torr, carbon dioxide has a solubility of 0.0356 M in water. What is the solubility at 25 C and 2070 torr? ____ M I know that at a given temperature, the solubility of a gas in a liquid is directly proportional to its pressure but how would

    asked by David on February 17, 2012
  40. Chemistry

    At 25oC, the equilibrium pressure of ammonia vapour above a 0.500 M aqueous ammonia solution is 0.84 kPa. Calculate the Henry's law constant for ammonia in M/bar. Do not include units. Include 4 significant figures.

    asked by Joseph on February 8, 2018
  41. Chemistry

    A 7.30-L container holds a mixture of two gases at 45 °C. The partial pressures of gas A and gas B, respectively, are 0.342 atm and 0.527 atm. If 0.250 mol a third gas is added with no change in volume or temperature, what will the total pressure become?

    asked by Garcia on November 1, 2012
  42. Chemistry

    Hi! I have another question. So 1 kcal of heat is added to 1.5 L of oxygen in a container at constant pressure. (1atm). Then volume increases to 3.1L. they want to know total energy change. Now i think the formula is DH=DU + PDV so what i did was DH = 1

    asked by Dave on June 11, 2009
  43. chemistry

    A 8.75-L container holds a mixture of two gases at 23 °C. The partial pressures of gas A and gas B, respectively, are 0.317 atm and 0.755 atm. If 0.100 mol of a third gas is added with no change in volume or temperature, what will the total pressure

    asked by sam on July 21, 2015
  44. Chemistry

    Hi! I have another question. So 1 kcal of heat is added to 1.5 L of oxygen in a container at constant pressure. (1atm). Then volume increases to 3.1L. they want to know total energy change. Now i think the formula is DH=DU + PDV so what i did was DH = 1

    asked by Dave on June 10, 2009
  45. chem

    A 8.00-L container holds a mixture of two gases at 23 °C. The partial pressures of gas A and gas B, respectively, are 0.349 atm and 0.819 atm. If 0.210 mol of a third gas is added with no change in volume or temperature, what will the total pressure

    asked by rachel on March 8, 2018
  46. chemistry

    A 8.90-L container holds a mixture of two gases at 45 C. The partial pressures of gas A and gas B, respectively, are .294 atm and .860 atm. If .100 mol of a third gas is added with no change in volume or temperature, what will the total pressure become?

    asked by Annie on June 21, 2013
  47. chemistry (science)

    What volume of methanol is formed if 2.86×10^11 of methane at standard atmospheric pressure and 25 degree celcius is oxidized to methanol? The density of CH3OH is 0.791g/mol . Assume that the oxidation of methane to methanol occurs in a 1:1 stoichiometry.

    asked by beeni on February 15, 2010
  48. chemistry

    1.0 mol of nitrogen oxide NO and 1.0 mol of oxygen were mixed in a container and heated to 450 oC. At equilibrium the number of moles of oxygen was found to be 0.70 mol. The total pressure in the vessel was 4.0 atm. Calculate the value of Kp for the

    asked by jemy on July 6, 2010
  49. statistics

    A researcher at a major hospital wishes to estimate the proportion of the adult population of the U.S. that has high blood pressure. How large a sample is needed in order to be 99% confident that the sample proportion will not differ from the tgrue

    asked by chalulu on March 13, 2011
  50. CHE MISTRY

    149ml bubble of hot gases at 217 degrees celcius and 1.78 atm escapes from an active volcano. What is the temperature, in celcuis, of the gas in the bubble outside the volcano if the new volume of the bubble is 164ml and the pressure is 0.770atm?

    asked by Jen on December 13, 2012
  51. Intro to Chemistry

    A 9.40-L container holds a mixture of two gases at 47 °C. The partial pressures of gas A and gas B, respectively, are 0.344 atm and 0.520 atm. If 0.160 mol of a third gas is added with no change in volume or temperature, what will the total pressure

    asked by Richard on March 10, 2016
  52. Chemistry

    A 8.25-L container holds a mixture of two gases at 39 °C. The partial pressures of gas A and gas B, respectively, are 0.186 atm and 0.884 atm. If 0.120 mol of a third gas is added with no change in volume or temperature, what will the total pressure

    asked by Amber on November 6, 2015
  53. Chemistry

    A 9.00-L container holds a mixture of two gases at 43 °C. The partial pressures of gas A and gas B, respectively, are 0.257 atm and 0.579 atm. If 0.110 mol a third gas is added with no change in volume or temperature, what will the total pressure become?

    asked by Kara on October 16, 2013
  54. Chemistry

    Hi! I have another question. So 1 kcal of heat is added to 1.5 L of oxygen in a container at constant pressure. (1atm). Then volume increases to 3.1L. they want to know total energy change. Now i think the formula is DH=DU + PDV so what i did was DH = 1

    asked by Dave on June 10, 2009
  55. Sentence Completion

    Demonstrate your understanding of the Word Bank words by completing each sentence in the space provided. Word Bank: aerodynamics; hydraulic; pursue; improbable; derides; legacy; riveting; ruminative; adept; compelling 1. Aerodynamics affect flight

    asked by Victoria on April 10, 2014
  56. Quemistry

    L has twice the volume of container J. Container J is at a temperature of 100 K, and container L is at 200 K. How does the pressure in container J compare with that in container L

    asked by JJ on June 24, 2012
  57. Chemistry

    In a constant-pressure calorimeter, 65.0 mL of 0.330 M Ba(OH)2 was added to 65.0 mL of 0.660 M HCl. The reaction caused the temperature of the solution to rise from 23.85 °C to 28.35 °C. If the solution has the same density and specific heat as water,

    asked by Nate on October 22, 2013
  58. chemistry

    At 1225 kpa, the temperature of a hot air balloon is about 500 degrees Celsius and is inflated to 200 cubic centimeters. Upon descending the pressure is decreased to 9 atm and 300 degrees Celsius. What is the new volume? Round to the nearest whole number,

    asked by sarah a on April 15, 2013
  59. Life science

    are humans subject to the same pressure of natural selction as other organism Humans show signs of natural selection occuring, according to these studies. http://www.news.cornell.edu/stories/Oct05/Bustamante.kr.html (Broken Link Removed)

    asked by q on July 25, 2007
  60. General Chemistry 1

    Gaseous hydrocarbons, which contain only carbon and hydrogen, are good fuels because they burn in air to generate large amounts of heat. A sample of hydrocarbon with mass 1.48 g exerts a pressure of 1.32 atm in bulb with volume 967 mL at 21.5 oC. Molar

    asked by Dan on March 4, 2012
  61. chemistry

    Given the following chemical reaction: Zn+HCl-->ZnCl2+H2(g) If you measured the total volume of collected gas over water at 20 degrees celcius t be 428ml at a total pressure of 845 torr, how many milliliters of 2.6M HCl would be required to produce the

    asked by regina on December 5, 2010
  62. Science/Weather

    Satellite images help meteorologists in all the following ways except: a) monitoring changes in the strength of storms b) locating areas of high and low pressure systems. c) predicting rainfall amounts d) recording daily high and low temperatures. I think

    asked by HiHi12345Kate on February 13, 2017
  63. organic chemistry

    Calculate the weight of benzene codistilled with each gram of water and the percentage composition of the vapor produced during a steam distillation. The boiling point of the mixture is 69.4°C. The vapor pressure of water at 69.4°C is 227.7 mmHg. Compare

    asked by victoria on June 8, 2013
  64. Chemistry

    A 0.60 L portion of a 1.2 M AgNO3 solution is mixed with a 0.3 L potion of a 1.2 M Na2CrO4 solution in an constant pressure calorimeter. Upon mixing, the solid Ag2CrO4 is formed and the heart released is 48.2 kJ. The specific heat of the solution is 4.18

    asked by Kyo on June 9, 2010
  65. Chemistry -buffers.

    The pH of an arterial blood sample is 7.15. upon acidification of 10 ml of the plasma 5.91ml of CO2 is produced at standard temperature and presure. Calculate-a) total CO2 in the specimen b)the individual concentration of disolved CO2(H2CO3) and HCO3-

    asked by Maria on November 6, 2011
  66. Health

    This can be C. OR D. couldn't it be? A second hand statement? Dang! or even B. Keep running this through my head Which one of the following statements is an example of hearsay? A. I saw the doctor administer the injection. B. I checked the patient’s

    asked by Jessica on July 6, 2010
  67. Honors English 10A

    Which of the following generalizations BEST applies to "The Third Bank of the River"? a. Family members often know each other the least. b. The bond between a father and his son is unbreakable. c. Sons feel the pressure to follow in their father's

    asked by Batman Baby on October 11, 2017
  68. chem

    A) Athletes that have to compete at high altitudes often go to the location and train for a month or so at these reduced pressures. This would be true of mountain climbers as well. What happens to the body that allows it to compensate ( over this period of

    asked by G on November 28, 2011
  69. 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 445 ? This is how I am solving this problem, but when I enter the answer it says im wrong. Can

    asked by confused on January 25, 2009
  70. chem

    A child receives a balloon filled with 27 L of helium from a vendor at an amusement park. The temperature outside is 304 K. What will the volume of the balloon be when the child brings it home to an air-conditioned house at 294 K? Assume that the pressure

    asked by reis on May 31, 2014
  71. Chemistry

    How many liters of gasesous methane (CH4) must be burned in oxygen to produce enough H2O and CO2 to fill a 3.0 L balloon? Assume that H2O and CO2 are the only combustion products and that the temperature and pressure remain constant. How would I solve

    asked by Amy~ on August 30, 2010
  72. Chemistry

    Given that 10.0 atm each of NO and O2 are introduced into a reaction vessel at room temperature. Calculate the partial pressure of each gas at equilibrium. 2NO(g)+O2 (g)---> 2NO2 (g) Kp =4.2x1012. at. roomtemperature. To solve this question I need to find

    asked by Larin on March 7, 2017
  73. Chemistry

    The reaction NO2(g) + NO2(g) → N2O4(g) is second order with a rate constant of 0.044 /M·s at a particular temperature and pressure. If the initial concentration of NO2(g) is 0.100 M, what is the concentration of NO2 after 20 minutes?

    asked by Albert on February 27, 2018
  74. SCIENCE???????/

    a region has a geothermal gradient of 180 ˚C km^-1.what type of metamorphism will occur at a pressure of 1.2×10^8 pa? answer the question by completing the sentence below. In these condition there would be ........??? metamorphism. I would appreciate if

    asked by centya on April 19, 2013
  75. chemistry

    a gas occupies a volume of 50.0mL at degrees Celsius and 630mmHg.at what temperature in degrees Celsius would the pressure be 101.3kPa if the volume remains constant?

    asked by charles on December 19, 2016
  76. physics, fluids

    would I be correct if I explained the 3 expressions in Bernoulli's equation as representing: P is the pressure 1/2*rho*v squared is the kinetic energy rho*g*h is the gravitational kinetic energy. Or is it more complicate than that. Thanks

    asked by charlie on January 24, 2009
  77. CHEMISTRY

    At 285mmHg +25 degrees celsius,a gas sample has a volume of 2270ml. what is the final pressure in mmHg at a volume of 1250ml and a temperature od 175 degrees celsius?

    asked by TERI on August 20, 2011
  78. Chem

    A balloon contains 30.0 L of helium gas at 103 kPa. What is the volume of the helium when the balloon rises to an altitude where the pressure is only 25.0 kPa? Assume that the temperature remains constant

    asked by Shrell on January 19, 2011
  79. Chem

    A balloon contains 30.0 L of helium gas at 103 kPa. What is the volume of the helium when the balloon rises to an altitude where the pressure is only 25.0 kPa? Assume that the temperature remains constant

    asked by Shrell on January 19, 2011
  80. Chem

    A balloon contains 30.0 L of helium gas at 103 kPa. What is the volume of the helium when the balloon rises to an altitude where the pressure is only 25.0 kPa? Assume that the temperature remains constant

    asked by Shrell on January 19, 2011
  81. Physics

    A mixture of gasoline vapor and air is placed in an engine cylinder. The piston has an area of 7.4 x 10^-3 m^2 and is displaced inward by 7.2 x 10^-2 m. If 9.5 x 10^5 Pa of pressure is placed on the piston, how much work is done during this process? Is

    asked by Edward on March 29, 2010
  82. science

    a ballon is filled with hydrogen at given pressure at 20 degree celsius .what fraction of gas will escape out of the ballon if temperature rises to 40 degree celsius at constant pressue.

    asked by anubhav on July 15, 2013
  83. chem

    A balloon occupies a volume of 352 cm3 at 615 Torr and 19 oC. If the pressure is changed to 410 Torr, what temperature must the gas in the balloon have to occupy the same volume?

    asked by mia on March 6, 2013
  84. Science

    Make a solutions by dissolving 4 lbs of sulfur dioxide in 100 lbs of water then heat to 30 degress C. what is the partial pressure of the sulfur dioxide over the solution specified?

    asked by Ann on April 13, 2013
  85. Chem

    A gas has density of 1.977 g/dm3 at STP (a) what is its molecular mass? (b) what is its density at 77¢XC and 0.95 atm pressure? (c)If the gas is an oxide and has the formula XO2, what is the atomic mass of X

    asked by Janice on November 15, 2015
  86. chem

    Consider 4.80 L of a gas at 365 mmHG and 20 c. . If the container is compressed to 2.90 L and the temperature is increased to 36 c , what is the new pressure, , inside the container? Assume no change in the amount of gas inside the cylinder

    asked by hanah on November 4, 2012
  87. Math, Physics

    The pressure in a fire hose is 20 atm. How high can a firefighter spray water from this hose? One atm is about 1×105 Pa. The density of water is 1.0 g/ml, or 103 kg/m3. The acceleration of gravity, g, is 9.8 m/s2.

    asked by Willie on November 13, 2012
  88. physics

    The pressure in a fire hose is 20 atm. How high can a firefighter spray water from this hose? One atm is about 1×105 Pa. The density of water is 1.0 g/ml, or 103 kg/m3. The acceleration of gravity, g, is 9.8 m/s2.

    asked by matt on November 13, 2012
  89. ap physics

    A 6.2 cm diameter pipe gradually narrows to 4.0 cm. When water flows through this pipe at a certain rate, the gauge pressure in these two sections is 30.0 kPa and 24.0 kPa, respectively. What is the volume rate of flow?

    asked by Anonymous on April 14, 2010
  90. ap physics

    A 6.2 cm diameter pipe gradually narrows to 4.0 cm. When water flows through this pipe at a certain rate, the gauge pressure in these two sections is 30.0 kPa and 24.0 kPa, respectively. What is the volume rate of flow?

    asked by Anonymous on April 14, 2010
  91. chemistry

    A high-altitude balloon contains 97.5 L of helium gas at 95.8 kPa. What is the volume when the balloon rises to an altitude where the pressure is only 21.5 kPa? (Assume that the temperature remains constant.)

    asked by lisa on March 2, 2011
  92. Chemistry

    An experiment shows a 144mL sample of gas has a mass of 0.173g at a pressure of 720mmHg at a temperature of 31 degrees celsius. what is the molar mass of the sample of gas?

    asked by Sally on March 19, 2013
  93. Chemistry

    A sample gas has a volume of 200 cm^3 at 25 degrees celsius and 700 mmHg. If the pressure is reduced to 280 mmHg, what volume would the gas occupy at the same temperature?

    asked by B on April 4, 2011
  94. chemistry

    Equilibrium is established between Br2(l) and Br2(g) at 25.0 (degrees)C. A 250.0 ml sample of the vapor weighs 0.486g. What is the vapor pressure of bromine at 25.0 (degrees)C, in millimeters of mercury.

    asked by Jim on June 21, 2010
  95. Chemistry

    The gaseous product of a reaction is collected in a 25 L container at 27 degrees Celsius. The pressure in a container is 300 kPa and the gas has a mass of 96 g. What is the formula mass of the gas?

    asked by Tania on February 24, 2011
  96. SCIENCE///////////

    a region has a geothermal gradient of 180 ˚C km^-1.what type of metamorphism will occur at a pressure of 1.2×10^8 pa? answer the question by completing the sentence below. In these condition there would be ........??? metamorphism. I would appreciate if

    asked by centya on April 18, 2013
  97. chemistry

    A sample of gas occupies 17mL at -112 degrees Celsius. Assuming the pressure is held constant, what volume does the sample occupy at 70 degrees Celsius?

    asked by Sophie on September 28, 2014
  98. College Chem

    The boiling point of water at 756 mm Hg is 99.85 degree C. What mass percent of surcrose (C12H22O11) should be present to raise the boiling point to 100.00 degree C at this pressure?

    asked by Donna on March 28, 2010
  99. Chemistry

    The boiling point of alcohol is 78.3 degrees Celcius at 760 mm atm pressure. Would the boiling point be higher or lower than 78.3 degree Celcius at hugher altirudes? Why?

    asked by Chen on July 19, 2016
  100. Chemistry

    Octane has a vapor pressure of 40 torr at 45.1 degrees Celsius and 400 torr at 104 degrees Celsius. What is its heat of vaporization? (Given R=8.314J/mol*K) Please explain.

    asked by Dayton on December 14, 2012