1. Chemistry

    If the thermometer reads 22 c and this corresponds to 19.8mmhg of water pressure , what is the pressure of a pure gas collected over water if the total pressure is 760 mmhg?next calculate the pressure of the gas and lets assume its hydrogen gas in atm.

    asked by Flor on March 25, 2017
  2. math

    you are responsible for buying supplies for an upcoming camping trip. you can buy packages of stew that just need water added and then are heated. Each package costs $4.95 and contains enough stew for 2 people. You need to buy enough packages so that you

    asked by Taylor on September 9, 2013
  3. math

    you are responsible for buying supplies for an upcoming camping trip. you can buy packages of stew that just need water added and then are heated. Each package costs $4.95 and contains enough stew for 2 people. You need to buy enough packages so that you

    asked by Taylor on September 9, 2013
  4. physics

    a) 2.0 kg of molten copper at its melting point of 1083 ºC (the copper is 100% liquid) is poured into a mold in a cooling water bath at 20 ºC. What mass of water is needed to bring the solidified copper and water to an equilibrium temperature of 30 ºC,

    asked by Eric on December 12, 2006
  5. physics

    Water is leaking out of an inverted conical tank at a rate of 10700.0 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height 7.0 meters and the diameter at the top is 4.0 meters. If the

    asked by emily on December 11, 2015
  6. chemistry

    2. Bromine can be added to limonene to create a brominated compound. The balanced equation is shown below. When 613 mg of limonene and 3.5 mL of a 10% (v/v) solution of Br2 in dichloromethane (a solvent) are combined, 959 mg of the product is isolated.

    asked by Grace on February 23, 2010
  7. Chem

    In the previous experiment, you recrystallized salicylic acid. If you were askedto take melting point of your crystals, would it be necessary to dry the salicylicacid crystals thoroughly first? What result would you expect from your melting point

    asked by Jason on October 14, 2008
  8. College Chemisty

    The pH of water collected in a stormwater run-off downstream from a Union Carbide chemical factory is 4.82. Calculate the H+ ion concentration of rainwater. The problem may start with: pH= -log H+ = 4.82. The answer is 1.5x10 power -5. Again, Can you

    asked by Elleni on October 22, 2010
  9. Scince

    am having trouble with Restate the problem in terms of the following: Manipulated variable Constant (control) variables Principles of experimental design State in correct form the hypothesis you intend to demonstrate. I have conducted the experiment but I

    asked by pookie on December 16, 2008
  10. Chemistry

    Please help me with these questions: 1. Consider the equation:2Na+ 2H2O-->2NaOH +H2 -If 92.0g of sodium is reacted with 76.0g of water until the reaction goes to completion, which reactant will remain and in what quantity? A: I know that H20 is the

    asked by Sally on January 28, 2011
  11. science chemistry

    1000g of a 55%(mass percentage) nitric acid solution is to be diluted to 20%(mass percentage) nitric acid solution.how many liters of water should be added to the starting solution?

    asked by Muhammad on November 5, 2012
  12. Chemistry

    1000 g of 55%(mass percentage) nitric acid solution is to be diluted to 20%(mass percentage) nitric acid solution. How many liters of water should be added to the starting solution?

    asked by Wube on May 2, 2012
  13. science chemistry

    1000g of a 55%(mass percentage) nitric acid solution is to be diluted to 20%(mass percentage) nitric acid solution.how many liters of water should be added to the starting solution?

    asked by Muhammad on November 5, 2012
  14. !chemistry !experiment!

    Design an experiment which is not a tritation, you could use to calculate the percentage of water of crystalallization in NA2CO3.xH20. Need apparatus, detailed method including precutions and assumptions, how the results are recorded and how the percentage

    asked by Cameron on June 1, 2010
  15. Chemistry

    Assuming that seawater has a total ion concentration (aka colligative molarity) of 1.10 M conc, calculate how many liters of seawater are needed to produce 68.7 L of fresh water at 20 C with an applied pressure of 51.0 bar.

    asked by Michael Stoll on January 11, 2014
  16. Chemistry

    Calculate the molar solubilty of CaC2O4 in a solution that has been buffered to a pH of 4.00 Remember to account for reactions involving H2C2O4 acting as an acid in water. To account for the buffer, simply assume that H+ = 1.00X 10^-4

    asked by Matt on October 31, 2007
  17. Science

    Chemistry Enthalpy Calculations? Given the equation: CaO + H2O ----> Ca(OH)2 A 1 g sample of CaO is dissolved in 100 ml water with density 1.00g/ml. The temperature rise is 3.7 degrees C. The specific heat is 4.00 J/g*deg. 1. Calculate the heat (in J)

    asked by Pablo on October 18, 2012
  18. Algebra 2

    Damon thank you for the previous help. A geyser sends a blast of boiling water high into the air. During the eruption, the height (h) (in feet) of the water (t)seconds after being forced out from the ground could be modeled by h = -16t*t + 70t. The last

    asked by Adam on March 13, 2008
  19. physics

    (a) Assuming that each cubic centimeter of water has a mass of exactly 1 g, find the mass of 3.76 cubic meter of water in kg. (b) Suppose that it takes 10.4 hours to drain a container of 59.1 m^3 of water. What is the “mass flow rate,” in kg/s, of

    asked by sagara on January 27, 2011
  20. science

    a u-tube is partially filled with water.oil which does not mix with water is next poured into one side until water rises by 2.5cm on the other side.if the density of oil be 0.8 ,the oil level will stand higher than the water level by how much?

    asked by abuobaida johar on May 17, 2012
  21. Physics

    A body of volume hundred centimetre cube is immersed completely in water contained in a jar containing water. the weight of the jar and the water before immersion was 700 grams. After immersion weight of the jar and the water will be

    asked by Vidhi on July 27, 2016
  22. Chemistry(Please check, thank you)

    For an experiment on the effect of a buffer solution, I need to calculate the expected pH of the buffer. I know that I have to make an amounts table and use the Hasselbalch equation to find the pH. For the first part, 0.10M HCl was added to a buffer. The

    asked by Hannah on March 29, 2012
  23. Ap Biology

    In the case of water, solid water is less dense then liquid water. What is happening at the molecular level? a. Molecules move faster in ice than water. b. Hydrogen bonds break more easily in ice. c. Hydrogen bonds break more easily in water. d. Molecules

    asked by Carol on May 24, 2017
  24. Chemistry

    Given the reaction: Cu2+(aq) + S2-(aq) CuS(s) What will happen (a) if CuSO4(aq) is added? And (b) if Na2SO4(aq) is added? A. (a) Nothing; (b) Less product will form B. (a) Less product will form; (b) Nothing C. (a) Nothing; (b) More product will form D.

    asked by Laura on September 18, 2016
  25. chemistry

    Given the reaction: Cu2+(aq) + S2-(aq) CuS(s) What will happen (a) if CuSO4(aq) is added? And (b) if Na2SO4(aq) is added? A. (a) Nothing; (b) Less product will form B. (a) Less product will form; (b) Nothing C. (a) Nothing; (b) More product will form D.

    asked by erika on September 15, 2016
  26. chemistry -3.2.4

    Given the reaction: Cu2+(aq) + S2-(aq) CuS(s) What will happen (a) if CuSO4(aq) is added? And (b) if Na2SO4(aq) is added? A. (a) Nothing; (b) Less product will form B. (a) Less product will form; (b) Nothing C. (a) Nothing; (b) More product will form D.

    asked by erika on September 15, 2016
  27. physics

    The amount of heat Q needed to turn a mass m of room temperature T_1 water into steam at 100degrees C T_2 can be found using the specific heat c of water and the heat of vaporization H_v of water at 1 atmosphere of pressure. Suppose that a commercial

    asked by Anonymous on November 28, 2008
  28. Chemistry

    Experiment 1 results: mass of crucible 88g mass of hydrate 93g mass of salt 91.196g 1. Calculate the following: a:mass of water in the hydrate sample (g) b:number of moles of water in the sample c:mass of pure salt in the sample (g) d:number of moles of

    asked by Leanna on March 8, 2015
  29. Chemistry

    O.k. I am confused. So here is what I did. Mass of empty flask plus stopper: 37.34g mass of stoppered flask plus water: 63.67g Mass of stoppered flask plus liquid: 52.01g Mass of water: 63.67 - 37.34= 26.33 Volume of Flask(density of H20 at 25*C, 0.9970

    asked by Sara on August 22, 2007
  30. Chemistry

    Is the following a physical or chemical separations: salt water --> water+ sodium chloride Do you change the composition of the water? Do you change the composition of the salt. I can't say which because you don't tell me how you separated them. For

    asked by George on September 10, 2006
  31. Chemistry

    Experiment Na2C2O4 is added to Pb(NO3)2.Precipitate forms (I think its PbC2O4). After the liquid above was decanted to another container. Dilute HNO3(aq) was added to it. The decanted cloudy solution cleared up a little but it was kinda cloudy still. Im

    asked by Andy on April 1, 2012
  32. Math

    A juice concentrate containing 65% solids is added to a single-strength juice solution(containing 15% solid), in order to generate a final product which contains 45% solids. Calculate the amounts required for the concentrate and for the single strength

    asked by Janice on February 8, 2012
  33. Math

    The school is having a big event in the gym and wants to use their rectangular tables. 6 people can sit together at one rectangular table. If 2 tables are placed together, 10 people can sit together. So the pattern I noticed is 4 people added whenever a

    asked by John Dosley on July 27, 2016
  34. chemistry

    What is the percent by mass of 3.55 g NaCl dissolved in 88 g H2O? 2. A solution is made by adding 1.23 moles of KCl to 1000.0 g of water. What is the % by mass of KCl in this solution? 3. If you have 100.0 mL of a 25% aqueous solution of ethanol, what

    asked by Anonymous on February 11, 2011
  35. chemistry

    What is the percent by mass of 3.55 g NaCl dissolved in 88 g H2O? 2. A solution is made by adding 1.23 moles of KCl to 1000.0 g of water. What is the % by mass of KCl in this solution? 3. If you have 100.0 mL of a 25% aqueous solution of ethanol, what

    asked by Anonymous on February 11, 2011
  36. CHEMSTRY

    . A small amount of solid Hg2Cl2 and 25 ml of metallic mercury were added to a solution of 5.03 x 10-2 M NaCl. A platinum electrode immersed in the layer of mercury was connected to a reference half-cell whose electrode potential was 0.222V. The voltage of

    asked by ABDULALEH on November 22, 2008
  37. calculus

    A water-trough is 10m long and has a cross-section which is the shape of an isosceles trapezoid that is 30cm wide at the bottom, 80cm wide at the top, and has height 50cm. If the trough is being fi lled with water at the rate of 0.2 m3/min, how fast is the

    asked by asdf on December 1, 2012
  38. chem 101

    Concentrated sulfuric acid is 18.0 M. If you are asked to make a 1L solution of 6M sulfuric acid. How much water (L) and how much acid (L) should be added to make this solution?

    asked by gale on November 23, 2015
  39. Chemistry

    Mass of an empty flask and stopper is 55.844g. 5mL of an unknown liquid is added and heated in a water bath at 99.7 degrees C. It then cools down. The stopper is removed and then replaced. The weight of all of this is 56.101g. The volume of the flask is

    asked by Gg on October 21, 2014
  40. AP CHEM

    Kc = 1.87 10-3 for the following reaction. PH3BCl3(s)=>PH3(g) + BCl3(g) (a) Calculate the equilibrium concentrations of PH3 and BCl3 if a solid sample of PH3BCl3 is placed in a closed vessel and decomposes until equilibrium is reached. (b) If the flask has

    asked by Ashley on February 7, 2009
  41. Calculus 1

    Water is leaking out of an inverted conical tank at a rate of 9,500 cm^3/min at the same time that water is being pumped into the tank at a constant rate. The tank has height 6 m and the diameter at the top is 4 m. If the water level is rising at a rate of

    asked by TayB on October 8, 2015
  42. math

    Water is leaking out of an inverted conical tank at a rate of 11400 cm^3/min at the same time that water is being pumped into the tank at a constant rate. The tank has height 8.0m and the the diameter at the top is 3.5m. If the water level is rising at a

    asked by shelby on March 25, 2008
  43. math

    Water is leaking out of an inverted conical tank at a rate of 10600.0 cm3/min at the same time that water is being pumped into the tank at a constant rate. The tank has height 14.0 m and the the diameter at the top is 6.0 m. If the water level is rising at

    asked by Anonymous on April 12, 2015
  44. calc rates

    Water is leaking out of an inverted conical tank at a rate of 10600.0 cm3/min at the same time that water is being pumped into the tank at a constant rate. The tank has height 14.0 m and the the diameter at the top is 6.0 m. If the water level is rising at

    asked by Anonymous on April 12, 2015
  45. science

    I am still new to physics, so I'm having a rough time. When a 1kg metal pan containing 1kg of cold water is removed from a refrigerator onto a table which absorbs more heat from the room, the pan or the water? I thought it was the water, because I thought

    asked by bbragg on October 25, 2013
  46. College Physics

    2 questions: a)Assuming that water has a density of exactly 1 g/cm3 (cubed), find the mass of one cubic meter of water in kilograms. b)Suppose that it takes 10 hours to drain a container of 5700m3 (cubed) of water. What is the "mass flow rate," in

    asked by Frank on August 22, 2010
  47. Chem

    A Texas Aggie buys 12 cans of dehydrated water. The cans weigh an average of 63.46g each before the dehydrated water is removed. If the density of pure distilled water is 0.9979 g/mL and each can has a volume of 3.154L, what is the total mass of the cans

    asked by Mercedes on February 28, 2007
  48. chemistry

    Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.8 of water upon warming from 25degree C to 50degree C . Assume that the water is initially saturated with nitrogen and

    asked by bf on January 25, 2010
  49. science (physic)

    An expansible ballon filled with air floats on the surface of a lake with 2/3 of its volume submerged .How deep must it be sunk in the water so that it is just inequilibrium neither sinking further nor rising? It is assumed that the temperature of the

    asked by Aryan on January 22, 2017
  50. Chemistry

    Why are the hydrogen bonds of a certain molecule weaker in solution (with water as a solvent) than in a vacuum? I'm supposed to have three reasons, and so far all I can come up with is that the water lowers the activation energy required to form the bond

    asked by Sarah on December 14, 2017
  51. Chemistry

    If 226 g of water is contained in a 311 g alu- minum vessel at 11◦C and an additional 92 g of water at 91◦C is poured into the container, what is the final equilibrium temperature of the mixture? The specific heat of aluminum is 900 J/kg · ◦C and of

    asked by Eliza on August 26, 2017
  52. Chemistry

    If 226 g of water is contained in a 311 g alu- minum vessel at 11◦C and an additional 92 g of water at 91◦C is poured into the container, what is the final equilibrium temperature of the mixture? The specific heat of aluminum is 900 J/kg · ◦C and of

    asked by Eliza on August 26, 2017
  53. Chemistry

    Suppose you have two 100-{\rm mL} graduated cylinders. In each cylinder there is 58.5mL of water. You also have two cubes: One is lead, and the other is aluminum. Each cube measures 2.0cm on each side. After you carefully lower each cube into the water of

    asked by Wendy on September 8, 2014
  54. chemistry

    Suppose you have two 100-{\rm mL} graduated cylinders. In each cylinder there is 58.5mL of water. You also have two cubes: One is lead, and the other is aluminum. Each cube measures 2.0cm on each side. After you carefully lower each cube into the water of

    asked by Jennifer on September 5, 2011
  55. Chemistry

    How much energy (heat) is required to convert 248 g of water from 0oC to 154oC? Assume that the water begins as a liquid, that the specific heat of water is 4.184 J/g.oC over the entire liquid range, that the specific heat of steam is 1.99 J/g.oC, and the

    asked by Jimmy on September 17, 2008
  56. Chem

    How much energy (heat) is required to convert 248 g of water from 0oC to 154oC? Assume that the water begins as a liquid, that the specific heat of water is 4.184 J/g.oC over the entire liquid range, that the specific heat of steam is 1.99 J/g.oC, and the

    asked by Dan on February 5, 2012
  57. Chemistry

    If 395 grams of water at 21 Celsius absorbs 285kJ of heat from a mountain climbers stove at an elevation where the boiling point of water is 87 Celsius, is this amount of energy sufficient to heat the water to its boiling point? How many kJ are required to

    asked by Kay on November 6, 2011
  58. math help please !!!

    i really neeed help, i have no idea how to answer this question ! i tried everything i know! A stone is thrown off a cliff. it reaches a maximum height of 30m after 2 seconds, then falls into the water below. it hits the water after 5 seconds a) how high

    asked by melissa on May 17, 2011
  59. Chemistry

    Suppose you have two 100- graduated cylinders. In each cylinder there is 37.0 of water. You also have two cubes: One is lead, and the other is aluminum. Each cube measures 1.2 on each side.After you carefully lower each cube into the water of its own

    asked by Hailey on September 7, 2012
  60. science

    dust is often light in color,while soot from fires is generally dark.what would happen to the amounts of solar radiation reflected and absorbed if a large amount of light-colored dust was added to the air?what if a large amount of dark soot was added?

    asked by bob on August 31, 2011
  61. Science

    Dust is often light in color, while soot from fires is generally dark. What would happen to the amounts of solar radiation reflected and absorbed if a large amount of light-colored dust was added to the air? What if a large amount of dark soot was added?

    asked by Bobert on September 16, 2010
  62. Chemistry

    What is the numerical relationship between the volume of base added to reach the first endpoint and the volume added to reach the final endpoint in the titration of a diprotic acid? What is the relationship for a triprotic acid?

    asked by Lyndsay on February 10, 2018
  63. chem

    I am posed with a question which, in order to be solved, needs the Van't Hoff Factor of ethylene glycol. Some research has shown me that ethylene glycol is an electrolyte, but I don't know how it dissociates in water. Any help would be appreciated. It is

    asked by Jakob on March 24, 2007
  64. Organic chemistry!!!Need helpp!!!

    1. Consider the effect of water concentration on rate of the reaction in water and acetone. WOuld you predict that the rate would be greater or less in the presence of a higher concentration of water? Explain your answer, using the structure of the

    asked by Jamie on December 11, 2006
  65. Organic chemistry!!!Need helpp!!!

    1. Consider the effect of water concentration on rate of the reaction in water and acetone. WOuld you predict that the rate would be greater or less in the presence of a higher concentration of water? Explain your answer, using the structure of the

    asked by Jamie on December 11, 2006
  66. algebra word problems

    1) tina has 48 mL of a solution that is 25% acid. how much water should she add to obtain a solution that is 15% acid? 2) how many grams of sugar must be added to 60 grams of a 32% solution to obtain a 50% solution?

    asked by mike on November 21, 2010
  67. physics

    The specific heat capacity of ice is about 0.5 cal/g degree C A)Supposing that it remains at that value all the way to absolute zero, calculate the number of calories it would take to change a 0.50g ice cube at absolute zero (-273 degree C}) to 0.50 g of

    asked by christy on April 4, 2012
  68. chemistry

    A camper obtained a sample of water from a mountain stream for cooking, but the water appeared to be cloudy with silt. What would be the best method of separating the silt from the water?

    asked by CeeCee on February 3, 2014
  69. chemistry

    The experiment Water solubility, used three compounds Ethanol, Hexanol and Cyclohexene. Hexanol was unsoluble in water. suggest a solvent would dissolve this compound in water?

    asked by Hasina on March 25, 2007
  70. Science

    Where is most of the surface water on earth found? a) as freshwater in rivers b) as frozen water near the pole c) as groundwater under the surface d) as salt water in oceans I think its either A or D. Am I correct?

    asked by Val on May 12, 2016
  71. Chemistry

    Water drips from a faucet into a flask at the rate of two drops every 3 seconds. A millimeter of water is 20 drops. What volume of water, in liters, will be collected in 2.5 hours?

    asked by Gabrielle on September 27, 2015
  72. Calculus

    An inverted conical water tank with a height of 16 ft and a radius of 8 ft is drained through a hole in the vertex at a rate of 5 ft^3/s. What is the rate of change of the water depth when the water is 4 ft

    asked by Ashlyn on April 10, 2018
  73. phyiscs

    Many kayaks are made of plastics and other composite materials that are denser than water. How are such kayaks able to float in water? Does the kayak displace water? What exactly is Archimedes's Principle?

    asked by Anonymous on May 9, 2007
  74. math

    A rectangular tank measures 30cm by 15 cm by 20 cm. It contains water to a depth of 15 cm. How many metal cubes of edge 5 cm need to be placed in the water to raise the water level to the brim of the tank?

    asked by bob on March 5, 2015
  75. Algebra 2

    A bottling company is filling 32 oz bottles of water. A bottle is accepted if it contains between 32.85 and 31.15 oz of water. What absolute value inequality describes the tolerance of volume of water in the bottle?

    asked by Cassie on August 18, 2014
  76. chemistry

    A 375 g piece of iron was heated to 975 °C and then quenched in a bucket containing one gallon of water at 20 °C. What was the temperature of the water after the iron and the water came to thermal equilibrium?

    asked by Whitney on April 10, 2011
  77. math

    a 2000 l.tank containing 550 l. of water is being filled with the water at the rate of 75 l. per minute from a full 1600 l tank. How long will it be before the two tanks the same amount of water?

    asked by rica on September 12, 2013
  78. chemistry

    A 375 g piece of iron was heated to 975 °C and then quenched in a bucket containing one gallon of water at 20 °C. What was the temperature of the water after the iron and the water came to thermal equilibrium?

    asked by Whitney on April 10, 2011
  79. chemistry

    a pool is 39.8 m long and 28.2 m wide. if the average depth of water is 4.90 ft, what is the mass (in kg) of water in the pool? enter your answer in scientific notation. the density of water is 1.0 g/mL

    asked by Sabrina on February 4, 2015
  80. Chemistry

    Water drips from a faucet into a flask at the rate of two drops every 5 seconds. A milliter of water is 20 drops. What volume of water, in liters, will be collected in 2.5 hours.

    asked by Tyler on September 26, 2016
  81. physics

    A fountain sends water to a height of 116 m. What is the difference between the pressure of the water just before it is released upward and the atmospheric pressure? (The density of water is 1000 kg/m2.)

    asked by HELP!!!! on April 16, 2011
  82. Physics

    A sprinkler mounted on the ground sends out a jet of water at a 30 ∘ angle to the horizontal. The water leaves the nozzle at a speed of 11 m/s . How far does the water travel before it hits the ground?

    asked by raquel on October 16, 2015
  83. chemistry

    Assume that the pressure is one atmosphere and determine the heat in joules required to produce 3.23 kg of water vapor at 100.0 °C, starting with (a)3.23 kg of water at 100.0 °C and (b)3.23 kg of liquid water at 0.0 °C

    asked by need on December 14, 2010
  84. BIOLOGY!

    In order to keep veggies crisp, grocery stores use coold water or ice. Which would keep veggies crisper, tap water or distilled water? Explain. I have no idea...

    asked by Anonymous on December 17, 2010
  85. PHYSICS

    A sprinkler mounted on the ground sends out a jet of water at a 20 ∘ angle to the horizontal. The water leaves the nozzle at a speed of 11 m/s . How far does the water travel before it hits the ground?

    asked by Meg on October 16, 2015
  86. chemistry

    2H2O(l)=2H2(g) +O2(g) if water is removed, the direction of equilibrium is unaffected since liquid water is not in the equil equation. What if large amount of water is removed, is the answer still the same

    asked by bme1 on April 25, 2010
  87. physics

    The speed of sound in water is 1498 m/s. A sonar signal is sent straight down from a ship at a point just below the water surface, and 1.95 s later, the reflected signal is detected. How deep is the water?

    asked by kara on March 6, 2012
  88. physics

    The speed of sound in water is 1498 m/s. A sonar signal is sent straight down from a ship at a point just below the water surface, and 1.95 s later, the reflected signal is detected. How deep is the water?

    asked by kara on March 6, 2012
  89. Physics

    Assume that the pressure is one atmosphere and determine the heat in joules required to produce 2.99 kg of water vapor at 100.0 °C, starting with (a)2.99 kg of water at 100.0 °C and (b)2.99 kg of liquid water at 0.0 °C.

    asked by Tim on May 5, 2013
  90. algebra

    the water ina beaker has of18g electeicity is passed thought the water for two hours afterward the water has a mass of only 16g what happen to the missing mass?

    asked by mary on September 17, 2014
  91. Chemistry

    A flask partially full of liquid water is heated to boiling and capped cold water is poured over the flask. The water boils even more vigorously explain

    asked by Noel on April 11, 2011
  92. Chemistry

    Consider a segment of water in the ocean that has a saturation solubility of 7.5 mg/L of O2. If there are algae in this body of water consuming CO2 at 1.0 mg/hr, how quickly will the water reach saturation if it starts at no O2 dissolved?

    asked by Anonymous on July 17, 2012
  93. physics

    The speed of sound in water is 1498 m/s. A sonar signal is sent straight down from a ship at a point just below the water surface, and 1.62 s later, the reflected signal is detected. How deep is the water?

    asked by Anonymous on February 20, 2012
  94. chemistry

    sample of liquid water at 100 degrees C absorbs 113 kJ of heat. HOw much water will be converted to steam heat vaporization if water is 2.26 kJ/g I just need help with what formula to set this up

    asked by LG on July 21, 2011
  95. TTM

    You drained the water from your pool at the end of the summer. It took 60 minutes to drain 1,800 gallons of water. On average, by what amount did the water in the pool change per minute?

    asked by Animegirl on November 6, 2015
  96. math fractions

    The teacher gives each pair of students one and fourteen-fifteenths liters to water their plants in the garden. If the pairs of students share the water evenly how much water does each student get

    asked by Kiki on September 30, 2015
  97. Physics

    The speed of sound in water is 1498 m/s. A sonar signal is sent straight down from a ship at a point just below the water surface, and 1.65 s later, the reflected signal is detected. How deep is the water?

    asked by Kalley on May 11, 2010
  98. physics

    Assume that the pressure is one atmosphere and determine the heat in joules required to produce 3.23 kg of water vapor at 100.0 °C, starting with (a)3.23 kg of water at 100.0 °C and (b)3.23 kg of liquid water at 0.0 °C

    asked by Help on December 14, 2010
  99. calcus

    water partially fills a hemispherical bowl of radius 40cm so that the depth of the water is 20 cms. write down an integral representing the volume of the water in the bowl

    asked by john on April 14, 2016
  100. Physics

    What size motor [W] is required to pump 12,000 gallons of water up a water tower (with a height of 25 ft.) in 25 minutes? The density of water is 1,000 kg/cubic meter.

    asked by Brianb on October 18, 2011