1. chemistry

    The heat of solution of potassium acetate in water is -15.3 ,What will be the final temperature when 0.132 is dissolved in 550 water that is initially at 25.1 ?
  2. chemistry

    water has a vapor pressure of 23.76 torr at 25C if 1.15 g H2O is enclosed in a 1.0 L container will any liquid be present if so what is the mass of the water?
  3. Science (Ecology)

    I need to search for an organization that works toward Water Development, other than World Water. I have to include what it does, countries of operation and funding
  4. geometry

    A spherical water tank has a diameter of 10 feet. How much water does it hold when half full (use 3.14 for , and round to the nearest hundredth)?
  5. chemistry

    The molar heat of fusion for water is 6.01 kJ/mol. How much energy must be added to a 75.0-g block of ice at 0°C to change it to 75.0 g of liquid water at 0°C? 1.44 kJ 10.18 kJ 12.48 kJ 25.04 kJ
  6. science

    Isn't part of my homework, but I'm curious- Does water evaporate faster from a body of water with a bigger surface area?
  7. Physics

    A hailstone traveling with a velocity of 43 meters/second comes to a virtual stop 0.28 seconds after hitting water. What is the magnitude of its acceleration in the water?
  8. geometry

    A spherical water tank has a diameter of 10 feet. How much water does it hold when half full (use 3.14 for , and round to the nearest hundredth)?
  9. Physical Science

    If you poked 3 holes in a vertical line in a bottle filled with water, which hole will spurt water the furthest? Why? -thanks so much for your help!
  10. Physics

    When 140000 joules of heat is removed from 0.60kg of water initially at 20Celsius, will all the water freeze? If not how much remains unfrozen
  11. chem

    A sample of silver with a mass of 63.3 g is heated to a temperature of 384.4 K and placed in a container of water at 290.0 K. How much heat is released into the water?
  12. Calculus

    An upright cylindrical tank with radius 3 m is being filled with water at a rate of 4 m3/min. How fast is the height of the water increasing?
  13. Physics

    A lukewarm bottle containing 800 grams of water is placed in a refrigerator. How many calories of heat must be removed from the water to chill its temperature from 55 C to 4 C?
  14. Science

    Which of the following is not needed to make a model of the water cycle? A. An energy source B. Water C. A closed container D. A drain D is correct
  15. thermochemistry

    The heat ofvaporization of water at 373K is40.7kj/mol. Find q for the evaporation of 491g of water at this temperation
  16. chemistry

    How much ice at zero degrees Celcius (in grams) would have to melt to lower the temperature of 351 of water from 25 to 5? (Assume the density of water is 1.0 .)
  17. Chemistry CP

    Water has a much higher specific heat capacity than most liquids. Explain in terms of the attractive forces between water molecules.
  18. physics

    A pebble drops straight down into a tub of water, setting off ____________________ waves that travel at the boundary between the water and air.
  19. Physics

    0.2 kg of water at 30 degrees celsius is put into a freezer to make ice. Hoe much energy has to be removed from the water to freeze it?
  20. geometry

    A spherical water tank has a diameter of 10 feet. How much water does it hold when half full (use 3.14 for , and round to the nearest hundredth)?
  21. science

    12-83. Determine the maximum height on the wall to which the firefighter can project water from the hose, if the speed of the water at the nozzle is 48ft/s
  22. Sacramento city college

    When a vacuum is pulled on the water with a 29.4 in.Hg,What is vapor created for each pound of water removed in cubic feet?
  23. chemistry

    The number of kilojoules needed to raise the temperature of 125 g of water from 20°C to 95°C is ________. The specific heat of water is 4.184 J/g °C.
  24. geometry

    A spherical water tank has a diameter of 10 feet. How much water does it hold when half full (use 3.14 for , and round to the nearest hundredth)?
  25. science

    What is the amount of water needed to obtain a saturated solution using 27g of barium nitrate? What mass of water is present
  26. Physics

    A pot contains 243 g of water at 78°C. If this water is heated and all evaporates to form steam at 100°C, what is the change in the entropy of the H2O?
  27. chemistry

    Determine the melting point of an aqueous solution containing 115 mg of saccharin (C7H5O3NS)added to 1.00 mL of water (density of water=1.00 g/mL, Kt=1.86 C/m)
  28. Physic

    If 0.045 kg of ice at 0 C is added to 0.390 kg of water at 34 C in a 0.150 kg aluminum calorimeter cup, what is the final temperature of the water? Please help!
  29. Science

    I can live in both fresh water and salt water. When full grown, I migrate long distaces to my place of birth. What am I?
  30. chemistry

    You have an aspirin dissolving in water, with this elements ( arthritis strength BC, arthropan and Ascripitin A/D), how can you separate them to find the amout of each on in water?
  31. Science

    When the temperature equals the dew point water vapor condenses back into water what is the relative humidity when this occurs
  32. physical science

    an object is observed to fall from bridge striking the water below 2.25s later with what velocity speed did it strike the water
  33. Physics

    A lukewarm bottle containing 800 grams of water is placed in a refrigerator. How many calories of heat must be removed from the water to chill its temperature from 55 C to 4 C?
  34. Chemistry

    A 45kg sample of water absorbs 364kJ of heat. If the water was initially at 28.2 Celcius, what is its final temperature? How do I figure this out....HELP!
  35. chem 1046

    Calculate the boiling point a. 10.5 g FeCl3 in 2.11 102 g water b.4.6% KCl by mass (in water) c.0.140 m MgF2
  36. chemistry

    why might heating hydrates in a crucible to find the percentage of water in the hyrate not be appropriate for all hydates? is it because some are flammable and water vapour might escape?
  37. algebra

    Joel has 2 gallons of water. He drinks gallon per day. How long will the water last? Express your answer in simplest form.
  38. ipc

    A hailstone traveling with a velocity of 43 meters/second comes to a virtual stop 0.28 seconds after hitting water. What is the magnitude of its acceleration in the water?
  39. Chemistry

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

    A lukewarm bottle containing 800 grams of water is placed in a refrigerator. How many calories of heat must be removed from the water to chill its temperature from 55 C to 4 C?
  41. physics

    when an aluminim is immersed in water it displaces 5 kg of water .how is the bouyant force acting on the aluminium object in newtons?(g=10m/s)
  42. geometry

    A spherical water tank has a diameter of 10 feet. How much water does it hold when half full (use 3.14 for , and round to the nearest hundredth)?
  43. physics

    A diver of mass 43.2 kg jumps off a high dive 10.0 m tall. If he comes to a stop 2.0 m below the surface of the water, what was his acceleration after he entered the water?
  44. physics

    A hailstone traveling with a velocity of 43 meters/second comes to a virtual stop 0.28 seconds after hitting water. What is the magnitude of its acceleration in the water
  45. Physics

    A garden hose has an inside diameter of 10 mm, and water flows through it at 4.0 m/s. At what rate does water leave the nozzle?. Answer in m3/s
  46. chemistry

    If 0.500 mol of nitrogen gas occupies a volume of 11.0 L at 0°C, what volume will 2.15 mol of nitrogen gas occupy at the same temperature and pressure?
  47. surface area and volume

    A rectangular prism has a volume of 48 cubic feet and surface area of 88 square feet. what are its dimensions? plz help me
  48. math

    length______ width 14 height 11 surface area_______ volume 2029.72 length*width*height gives you volume, which you know. But you can solve for length.
  49. geometry

    The volume of a basketball is 448.92 cubic inches, and the volume of a baseball is 12.77 cubic inches. How many baseballs would “fit” inside a basketball?
  50. Volume and surface area

    A rectangular prism has a volume of 48 cubic feet and surface area of 88 square feet. what are its dimensions? plz help me
  51. Math

    Find the volume of the figure if the radius of the hemisphere and cylinder is 6 inches and the height of the cylinder is 12 inches. Find the volume in terms of pi.
  52. ap chemistry

    a gas has a pressure of 1.1 atm occupies a volume of 24 liters. What will the pressure be if the gas has a final volume of 19 liters at constant temperature?
  53. Volume and Surface Area

    Find the exact surface area and volume of a right square pyramid with a radius of 2 inches and a height of 6 inches.
  54. Area/volume of hollow figure

    A hollow box 10x10in with a thickness of 1in with a length of 500 Would the area be (10*10) Would the volume be ((10*10)-(9*9))*500
  55. Physics

    a 50ml volume of gas is measured at 20 degree celsius,if the pressure remains constant what will be the volume of the gas at 0 degree celsius?
  56. Chem 105

    A gas has a volume of 36.0 L and a pressure of 750. torr when the temperature is 10. °C. What is the pressure if the volume changes to 15.0 L and the temperature changes to 78 °C, if the amount of gas stays the same?
  57. SCIENCE

    I need help. I cannot find an answer to this in my book. What would happen to a frog placed in seawater? What would happen to a sea cucumber put in fresh water? The concept here is osmosis. Bear in mind sea water is concentrated salt water. Then read the
  58. Science

    A sample of gas under a pressure of 622 kPa has a volume of 233 mL. The pressure is increased to 988 kPa, while the temperature remains constant. What volume will the gas occupy at this pressure?
  59. Physics

    The pressure of a gas in a cylinder with a movable piston is increased from 45 kPa to 90 kPa. If the temperature is held constant, and the initial volume of the gas in the cylinder is 0.5 m3, what is the final volume of the gas? a. 2 m3 b. 1 m3 c. 0.5 m3
  60. chemistry

    A sample of gas in a balloon has an initial temperature of 25\({\rm \, ^{\circ}C}\) and a volume of 1670\({\rm L}\) . If the temperature changes to 82\({\rm \, ^{\circ}C}\) , and there is no change of pressure or amount of gas, what is the new volume,
  61. chemistry

    An ideal gas is contained in a cylinder with a volume of 5.0 102 mL at a temperature of 30.°C and a pressure of 710. torr. The gas is then compressed to a volume of 27 mL, and the temperature is raised to 800.°C. What is the new pressure of the gas?
  62. Physics

    An ideal gas is compressed at constant pressure to one-half its initial volume. If the pressure of the gas is 120 kPa, and 760 J of work is done on it, find the initial volume of the gas.
  63. chemistry

    the gas contained in a piston is compressed from an original volume of 1.15 L to a new volume of 0.45 L. Assuming that the temperature of the gas remains constant what is the new pressure exerted on the gas if the original pressure was 2.15 atm?
  64. college Chemistry

    A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initial volume of H2SO4 was 13.28 and the final volume of H2SO4 was 28.29 mL when the solution turned very slightly pink. What is the concentration of NaOH?
  65. Physics

    The pressure of a gas in a cylinder with a movable piston is increased from 45 kPa to 90 kPa. If the temperature is held constant, and the initial volume of the gas in the cylinder is 0.5 m3, what is the final volume of the gas? a. 2 m3 b. 1 m3 c. 0.5 m3
  66. chemistry

    the gas contained in a piston is compressed from an original volume of 1.15 L to a new volume of 0.45 L. Assuming that the temperature of the gas remains constant what is the new pressure exerted on the gas if the original pressure was 2.15 atm?
  67. chemistry

    An ideal gas is contained in a cylinder with a volume of 5.0 102 mL at a temperature of 30.°C and a pressure of 710. torr. The gas is then compressed to a volume of 27 mL, and the temperature is raised to 800.°C. What is the new pressure of the gas?
  68. physics

    An object with a mass of 34.0 g and a volume of 41.0 + B cm3 is placed in a liquid with a density of 1.25 g/cm3. Find the volume of the part of the object that is NOT submerged in the liquid. Give your answer in cm3 and with 3 significant figures.
  69. Chemistry Help Pls!!!

    A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initial volume of H2SO4 was 13.28 and the final volume of H2SO4 was 28.29 mL when the solution turned very slightly pink. What is the concentration of NaOH?
  70. college Chemistry

    A 21.18 mL of 0.250 M NaOH is titrated with a H2SO4 solution. The initial volume of H2SO4 was 13.28 and the final volume of H2SO4 was 28.29 mL when the solution turned very slightly pink. What is the concentration of NaOH?
  71. science

    A gas sample has a volume of 150ml when the pressure is 175kPa. If the temperature and amount of gas remains constant, what volume will the gas sample occupy at a pressure of 120 kPa
  72. chemistry

    An ideal gas is contained in a cylinder with a volume of 5.0 102 mL at a temperature of 30°C and a pressure of 695. torr. The gas is then compressed to a volume of 25 mL, and the temperature is raised to 814.°C. What is the new pressure of the gas?
  73. physics help please

    How many grams of water at 20.0C are necessary to change 800.0g of water at 90.0C to 50.0C
  74. science

    what kind of change is it when water goes through a water cycle
  75. Science

    Why is 100g of water and 1000g of water the same density?
  76. Science

    What is more dense, fresh water or salt water and how do you know?
  77. Science

    What is the percent of fresh water and salt water?
  78. science

    What happen to the water in the basin when you placed a drop of water?
  79. Chemistry

    How many milliliters of water will it take to fill a 2.00 L bottle that already contains 1.87 L of water?
  80. physics

    A water tank measures 2m*4m*5m. what mass of water will it contain
  81. reading

    how is U.S. water use similar to that "water-poor" countries? how is it different?
  82. Science

    What is water treatment? Is it also the same with water filtration? Please answer! Thanks
  83. Science

    An object that floats in water has ___________ in water?
  84. science

    how to clean up a oil spill from water without getting any of the water out?
  85. chemistry

    How many moles of water are contained in 160ml of water at 4'c?
  86. chemistry

    Pipette 3 drops of oil into a test tube of water and shake. Describe what takes place and why? - Would it be the oil settles at the top of the water, because the oil is less dense, and its a non-polar substance, so it doesn't mix with a polar substance
  87. Calc AB

    I've been trying to solve this problem for the past 45 minutes and could really use some help. I'm given that water flows into a tank at a rate of (5t+4) gallons/min. Water flows out of the tank at a rate of 0.5(t^2) gallons/min. At t=0 min the tank
  88. science

    Which statement explains why light from sun can warm up water in a glass? a)light travels very fast. b)light travels in straight lines. c)water reflects light energy. d)water absorbs light energy.
  89. algebra2

    Tim has a pool slide that makes an angle of 25 with the water the top of the slide stands 4.5feet above the surface of the water A:how far out into the pool will the slide reach B:The slide makes a straight line into the water. How long is the slide
  90. physics

    Water is poured into a container that has a leak.The mass 'm' of the water is given as a function of time 't' by, m=5t^0.8 -3t + 20 , with t>=0, mass in grams and t in seconds A) at what time is the water mass greatest,and B) what is the greatest mass?
  91. please help me paraphrase

    "The Antartic is the vast source of cold on our planet, just as the sun is the source of our heat, and it exerts tremendous control on our climate,"[Jacques] Cousteau tole the camera. "The cold ocean water around Antartica flows north to mix with warmer
  92. calculus

    A 3-dimensional structure is obtained from rotating the parabola y=x^2 about the y-axis. Each second, 2π units^3 of water is being poured into the structure from the top. When 8π units^3 of water has been poured in the structure, the
  93. calculus

    A 3-dimensional structure is obtained from rotating the parabola y=x^2 about the y-axis. Each second, 2π units^3 of water is being poured into the structure from the top. When 8π units^3 of water has been poured in the structure, the
  94. Chemistry

    The concentration of Ca2+ in a particular water supply is 5.7×10−3M. The concentration of bicarbonate ion, HCO−3, in the same water is 1.7×10−3M. What masses of Ca(OH)2 and Na2CO3 must be added to 5.6×107L of this water to reduce the
  95. Physics 20

    1. How much heat energy is required to change 500 grams of water at 100 degrees Celsius to steam at 100 degrees Celsius? 2. How much energy is lost if 7kg of water is cooled from 46 degrees Celsius to 2 degrees Celsius? 3. How much energy is gained when a
  96. chemistry

    A sample of gold is at a initial temperature of 350 k. Once dropped into a coffe cup calorimeter of heat capacity 400 k^-1 it contains 50 g of water at 300 k. Specific heat capacity is 0.129 for gold and 4.18 for water. what is the final temp of all gold,
  97. chemistry

    The enthalpy of solution of nitrous oxide (N2O) in water is -12 kJ/mol and its solubility at 20 oC and 1.00 atm is 0.121 g per 100. g of water. Calculate the molal solubility of nitrous oxide in water at 1.600 atm and 20 oC. Hint, first find Henry's law
  98. CHEMISTRY

    The enthalpy of solution of nitrous oxide (N2O) in water is -12 kJ/mol and its solubility at 20 oC and 1.00 atm is 0.121 g per 100. g of water. Calculate the molal solubility of nitrous oxide in water at 1.600 atm and 20 oC. Hint, first find Henry's law
  99. College Algebra

    The per-capital consumption of bottled water wa 5 gallons in 1990 and has been increasingly yearly by a factor of 1.083. What was the per capital consumption of bottled water 13 years later? *round the answer to three decimal places * Water consumption in
  100. CHEMISTRY

    The enthalpy of solution of nitrous oxide (N2O) in water is -12 kJ/mol and its solubility at 20 oC and 1.00 atm is 0.121 g per 100. g of water. Calculate the molal solubility of nitrous oxide in water at 1.600 atm and 20 oC. Hint, first find Henry's law