1. PHYSICS URGENT DUE IN 15 MINUTES

    The figure below (a) shows a sphere with a radius of r = 157 mm (density ñ = 1.24 g/cm³) suspended in water by a string. The ball is completely submerged in the water and the string is attached from the bottom of the water tank to the bottom of the

    asked by Anonymous on March 25, 2011
  2. chemistry

    a graduated cylinder containing 75.0 mL of water has a mass of 149.86 g. A piece of metal is added to the cylinder and the volume of the water changes to 86.3 mL. The mass of the graduated cylinder, water and metal rises to 218.90 g.

    asked by nicholas on September 18, 2016
  3. CHEMISTRY

    Nitric acid can be produced by the reaction of gaseous nitrogen dioxide with water. 3NO2(g) + H2O(§¤) −> 2HNO3(§¤) + NO(g) If 794 L of NO2 gas react with water, what volume of NO gas will be produced? Assume the gases are measured under the same

    asked by Morgan on May 9, 2015
  4. scdience

    the density of gas was done twice, but with the tablet and 15 cm^3 of water in each case.When the rubber tube was placed as shown , 435 cm^3 of gas was collected. When the tube reached only slightly beyond the mouth of the bottle, only 370 cm^3 of gas was

    asked by david on March 2, 2015
  5. Finance/Accounting

    I am not sure that I have these questions right, can someone take a look and see if they appear to be correct? Instructions: Each of the situations below may illustrate a violation of an accounting assumption or principle. Indicate the assumption or

    asked by mchawk on May 15, 2009
  6. math

    The interior of a typical mesung cup is a right circular cylinder of radius 6 cm. The volume of water we put in the cup is therefore a function of the level h to which the cup is filled. How closely do we have to measure h to measure out one liter of water

    asked by ibranian on August 8, 2012
  7. maths

    a solid cube of side l floats on water with 20% of its volume under water. Cubes identical to it are piled one by one on it. Assumes that the cubes do not slip or topple and contact between their surfaces is perfect. How many cubes are required to submerge

    asked by santosh on December 25, 2011
  8. niagara falls

    what are the Physical Featuers of Niagara Falls? The important features are the height of the drop, the widths of the several sections, and the water flow rate. You can find data on these easily with a search engine.

    asked by mariah on September 24, 2006
  9. Science : Chemistry

    The concentration of dissolved chlorine in tap water can be determined by adding excess potassium iodide and then using aqueous sodium thiosulphate to precipitate the resulting iodide ions. In Ontario, the aesthetic objective for chlorine in tap water is a

    asked by Maame on December 10, 2011
  10. physics(mechanics)

    how does the engines get cooled when the vehicle moves in a hill ramp.?i ask this question because its said that cooling fans are drived by the rotation of the engines sothat the cooling fans are mounted in the engine casing.If that's is the case then at

    asked by NANDHU on May 12, 2013
  11. chemistry

    I think, by convention, most would consider the solvent as the major component and the others as solutes. Actually, however, it dosesn't matter. I just read that when one liquid is dissolved in another, the minor component is usually considered the solute

    asked by DrBob222 on March 1, 2007
  12. Chemistry

    the volume of air in a balloon is more in a beaker of hot water than if the same balloon is in a beaker of ice water. why does this happen?

    asked by Mary on May 27, 2009
  13. Science

    a beaker has 130 ml of water in it. a rock is placed in the beaker and the water level rises to 148ml. what is the volume of the rock?

    asked by Mayra on October 12, 2016
  14. Math

    A rock is placed into a graduated cylinder containing 80 mL of water. What is the volume of the rock if the water level rises to the 120 mL level?

    asked by Miracle on September 29, 2011
  15. Science

    If I take a 1 liter water bottle filled with water, what will most likely happen to the water and why? A.The water will get warmer B.The water will get cooler C.The water will stay the same D.None of the above I've tried this and I think it's A;if so why?

    asked by mysterychicken on December 15, 2008
  16. chemistry

    Assume that 0.0200 mole of a gas is collected in the lab by water displacement. If the temperature of the gas is 26.0oC and the total pressure in the gas tube is 745 mm Hg (including water vapor), what is the volume in liters of the dry gas? (Use the ideal

    asked by Anonymous on March 31, 2014
  17. math

    A cubical water tank has edge 5m long. Find the volume of water in the tank if 1/5th of the tank is empty. Write down the equation of the line whose gradient is 3/2 and which passes through P, where P divides the line segment joining A(-2,6) and B(3,-4) in

    asked by reshma on November 22, 2015
  18. chemistry

    what would the final volume of water be if 80 kJ were added

    asked by ashley on April 28, 2010
  19. college chemistry

    A diving bell is a container open at the bottom. As the bell descends, the water level inside changes so that the pressure inside equals the pressure outside. Initially, the volume of air is 8.58 m3 at 1.020 atm and 20°C. What is the volume at 1.584 atm

    asked by Betty on December 10, 2011
  20. Physics Measurements

    How big is a ton? That is, what is the volume of something that weighs a ton? To be specific, estimate the diameter of a 1-ton rock, but first make a wild guess: will it be 1ft across, 3ft, or the size of a car? [Hint: Rock has mass per volume about 3

    asked by Phillip on August 11, 2009
  21. chemistry

    A gas 'X' is collected over water at 17 degree C and 750mm. pressure. If volume of the gas is 50cc., calculate the volume of the dry gas at S.T.P. (at 17 degree C the vapour pressure is 14mm.)

    asked by Anonymous on July 20, 2012
  22. chem

    A stack of 15 pennies is immersed into a 100 mL graduate initially containing 20.6 mL of water. The volume in the graduate cylinder increases to 26.0 after the pennies are added. Calculate the volume in mL of the stack of 15 pennies.

    asked by Anonymous on August 28, 2013
  23. Chemistry

    Sodium oxide, reacts with water to give NaOH. A) Write a balance equation? B)What is the pH of the solution prepared by allowing 1.55 g of Na2O to react with 500.0 ml of water? (assume there is no volume change) C) How many milliliters of 0.0100M HCL are

    asked by Ann on November 21, 2010
  24. programing logic and design

    I got high last night and feel terrible if someone could answer this question I would love them forever The Parasol Insurance Group sells a variety of insurance policy types. Design a flowchart for a program that accepts a client’s name and “Y’ or

    asked by arima on September 26, 2016
  25. English

    What can we do to save water? 1. We can turn off the water when we are not using it. 2. We can turn off the water when we are brushing teeth. 3. We can use only a little water when we wash face. 4. We can use a little water when we wash hair. 5. We can

    asked by rfvv on April 10, 2015
  26. chemistry

    The volume of an aqueous solution of NaCl at 25oC is expressed as a function of the amount m in 1kg of solvent in the following form; V/cm3 = 1000.94 + 16.4 (m/mol) + 2.14 (m/mol)3/2 - 0.0027 (m/mol)5/2 Find the partial molar volume of NaCl and water in 1

    asked by pritisha on August 13, 2018
  27. premise and conclude

    One might explain the difference in reaction by saying that we naturally respond more strongly to the deaths of Americans closer to home than to those of others halfway around the world. But then consider the fact that, every month during 2001 more

    asked by tommy evans on October 12, 2009
  28. Chem, could someone cheak my work please.

    I did this experiment where I filled a graduated cylinder with water. The I put a stopper on it and put it under water and removed the stopper. The with a modified lighter (that wouldn't release sparks) I added butane gas. I got the following results: mass

    asked by Lena on December 12, 2008
  29. physics

    Two circular holes, one larger than the other, are cut in the side of a large water tank whose top is open to the atmosphere. Hole 1 is the larger hole, and hole 2 is the smaller hole. The center of one of these holes is located 6 times as far beneath the

    asked by chel on March 11, 2013
  30. physics

    A paperweight weighs 6.9N in air. When it is completely submerged in water it appears to weigh 4.3N. A) What is the volume of the paperweight? B) What is the density paperweight? The density of water is 1000kg/m3.

    asked by Joe on November 4, 2012
  31. physics

    A paperweight weighs 6.9N in air. When it is completely submerged in water it appears to weigh 4.3N. A) What is the volume of the paperweight? B) What is the density paperweight? The density of water is 1000kg/m3.

    asked by Joe on November 4, 2012
  32. physics

    A paperweight weighs 6.9N in air. When it is completely submerged in water it appears to weigh 4.3N. A) What is the volume of the paperweight? B) What is the density paperweight? The density of water is 1000kg/m3.

    asked by Joe on November 4, 2012
  33. MATH WORD PROBLEM HELP PLEASE

    A water tank is in the shape of a right circular cylinder with a height of 20 feet and a volume of 320pi cubic feet. What is the diameter, in feet, of the water tank?

    asked by Anonymous on April 14, 2015
  34. physics

    an antifreeze solution is made by mixing ethylene glycol (density= 1116 kg/m^3) with water. suppose that the specific gravity of such a solution is 1.0730. assuming that the total volume of the solution is the sum of its parts, determine the volume

    asked by kai on November 21, 2010
  35. Excel Problem

    If the initial temperature is 115 F (46 degrees C), the cold water temperature is 1.7 (degrees C), and the volume and volumetric flow rate are 3,000 liters and 30 liters per minute, respectively, (a) Calculate the expected water temperature at 5-minute

    asked by Angel on September 19, 2011
  36. Chemistry 3A

    An aqueous solution contains the ions B, C, and D that are in equilibrium with one another according to the reaction B (aq) + C (aq) ->/

    asked by Sarah on July 21, 2013
  37. Calculus

    Water is draining at a rate of 2 cubic feet per minute from the bottom of a conically shaped storage tank of overall height 6 feet and radius 2 feet . How fast is the height of water in the tank changing when 8 cubic feet of water remain the the tank?

    asked by Vivi on February 13, 2013
  38. physics

    A car of mass 1.2tonnes is travelling up a slope of 1 in 150 at a constant speed of 10m/s. if the frictional and air resistances are 100 newton , calculate the power exerted by the engine. the car descends the same slope working at a rate of 2kw what will

    asked by asad on January 5, 2016
  39. math

    A car of mass 1.2tonnes is travelling up a slope of 1 in 150 at a constant speed of 10m/s. if the frictional and air resistances are 100 newton , calculate the power exerted by the engine. the car descends the same slope working at a rate of 2kw what will

    asked by asad on January 5, 2016
  40. Chem 2

    A 100-mL sample of water is titrated with EDTA solutions in problem 2. The same amount of Mg2+ is added as previously, and the volume of EDTA required is 31.84mL. What volume of EDTA is used in titrating the Ca2+ in hard water? Previous answers are: Moles

    asked by Carlye on February 12, 2014
  41. social studies

    1.) What influence did Henry Ford have on other industries of the time? A. His keenness for advertising began a marketing revolution? **** B. His creation of the automobile engine directly led to first flight. C. His production of passenger automobiles

    asked by plz check my answers! on January 23, 2017
  42. thermodynamics

    3.4 A heat engine operates between two heat reservoirs with temperatures of 560 and 280 K a) The heat engine itself has a temperature of 560 K during heat addition from the 560 K reservoir and a temperature of 280 K during heat rejection to the 280 K

    asked by jody on June 15, 2007
  43. Chem

    What volume of water, in mL, is needed to dissolve 8.7 mg of carbon monoxide gas when the partial pressure of carbon monoxide above the water is 1.6 atm at 25 °C? The Henry's constant for carbon monoxide gas in water at 25 °C is 9.5×10-4 M/atm.

    asked by SR23789 on September 12, 2017
  44. space

    A space capsule needs to have its speed inceased slightly to set it on course.A spaceship moves up slowly to the capsule, and makes contact with it.The spaceship's rocket engine is fired for 10s. The gases exert a forward force of 12000n on the spaceship

    asked by Nwabisa maswana on February 6, 2012
  45. Chem

    Ca(s) + 2H+(aq) → Ca2+(aq) + H2(g) An experiment is performed to determine the volume of hydrogen gas produced when calcium reacts with excess HCl(aq) as represented by the net ionic equation above. A 0.0720 g sample of pure calcium and a solution of 1.0

    asked by Jess on April 23, 2013
  46. chemistry

    Hi! i'm kinda having trouble getting this.. Don't understand it really from Ca(OH)2 + 2HCl-----> CaCl2 + 2H2O How do i calculate Ca+? :You need much more information. 1) do you mean the concentration of Ca+ ion? 2) is there excess HCl? What is given? ok It

    asked by Mallory on March 3, 2007
  47. Art

    How is graffiti typically used as an art form? Walls are painted to blend in with the surroundings History recorded in an open minded way Individuals express there social and political opinions*** Utilitarian art is crated two dimensions.

    asked by Kiru on September 27, 2016
  48. Art

    How is graffiti typically used as an art form? Walls are painted to blend in with the surroundings History recorded in an open minded way Individuals express there social and political opinions*** Utilitarian art is crated two dimensions.

    asked by Shalee ^~^ on September 28, 2015
  49. math

    An alcohol solution consists of 6 gallons of pure water and x gallons of alcohol, x > 0. Let f(x) be the ratio of the volume of alcohol to the total volume of liquid. [Note that f(x) is the concentration of the alcohol in the solution.] (a) Find a possible

    asked by emily on April 24, 2013
  50. math

    An alcohol solution consists of 6 gallons of pure water and x gallons of alcohol, x > 0. Let f(x) be the ratio of the volume of alcohol to the total volume of liquid. [Note that f(x) is the concentration of the alcohol in the solution.] (a) Find a possible

    asked by emily on April 23, 2013
  51. mangement science the art of modeling w/ spreadshe

    Five years ago, an automobile manufacturer started offering an extended warranty to buyers of its sport-utility vehicle.  The extended warranty covered defects occurring after the initial three-year warranty expired.  Of the 10,000 people who

    asked by melissa on February 20, 2011
  52. Chemistry

    Q1: You wish to prepare a buffer solution with pH = 11.10. What volume of 6.0 M HCl would you add to 500 mL of 0.10 M (C2H5)2NH to prepare the buffer? You may assume that the solution’s volume remains constant. Q2: What is the resulting pH when 20 mL of

    asked by David on February 24, 2013
  53. Chemistry

    Q1: You wish to prepare a buffer solution with pH = 11.10. What volume of 6.0 M HCl would you add to 500 mL of 0.10 M (C2H5)2NH to prepare the buffer? You may assume that the solution’s volume remains constant. Q2: What is the resulting pH when 20 mL of

    asked by Anonymous on February 24, 2013
  54. Chemistry

    A plumber installs a pipe that has a diameter of 10 cm and a length of 2.4m, Calcualte the volume of water(in cm3) that the pipe will hold. Express your answer to the correct number of significant digits. Note: The formula for the volume of a cylinder is

    asked by Jessica on September 13, 2014
  55. Chemistry

    The solubility of benzoic acid in water is 2.56g in 100cm3 at 79 C and 0.29g in 100cm3 at 20 C. What is the minimum volume of water in which 1g of benzoic acid can be dissolved at 79 C? I set up a dimensional analysis but since the question gives 2 sets of

    asked by Sophie on June 25, 2008
  56. Physics

    I'm super confused about how to approach this problem. Please help. A ball of Styrofoam (ρ = 100 kg/m3) is totally submerged in water. The ball has a mass of 300.0 g What is the volume of the ball? If a string holds the ball when it’s in the water,

    asked by Sandy on January 17, 2014
  57. Physics please help.

    A ball of Styrofoam (ρ = 100 kg/m3) is totally submerged in water. The ball has a mass of 300.0 g (it could be a pretty big block). What is the volume of the ball? If a string holds the ball when it’s in the water, what’s the tension in the string?

    asked by unknown on January 15, 2014
  58. O-Chem

    Find the minimum volume of hot water needed to dissolve 100 mg of salicylic acid. Can someone help me how to start this out? I would greatly appreciate it. The data is [temp] [amount of salicylic acid per 100 ml water, g] 0 0.10 10 0.13 25 0.23 50 0.63 75

    asked by Christine on August 30, 2009
  59. chemistry

    When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17 degrees C. Calculate delta H of this reaction. (Assume that the total volume is the sum of the individual volumes and that density

    asked by patrick on October 15, 2015
  60. chemistry

    A sample of hydrogen gas was collected over water at 36 degrees celsius and 855 mmHg. The volume of the container was 6.50 L. Calculate the number of moles of H2 collected. (vapor pressure of water is 44.6 torr at 36 degrees Celsius)

    asked by lavonne on October 20, 2010
  61. college- find domain and range

    y= X^2 + X - 500/10 and y is the number of milliliters of fuel consumed per second and X is the speed of the engine in revolutions per minute. If the engine operates between 100 revolutions per minute and 400 revolutions per minute what is the domain and

    asked by lucky bee on March 20, 2013
  62. Physics please help

    The engine of a train has a mass of 5x10^4 kg. it can accelerate six railway cars having a total mass of 3x10^5 kg by 0.4 m/s^2 (the 6 railway cars have a combined mass of 3x10^5). what acceleration can the same engine using the same force give to four

    asked by Jess J on April 26, 2011
  63. Physics please check repost

    The pressure and volume of a gas are changed along a path ABCA in the figure. The vertical divisions on the graph represent 4.0 x 10^5 Pa, and the horizontal divisions represent 4.5 x 10^-3 m3. The diagram is a upright rectangle divided into small squares

    asked by Mary on April 24, 2007
  64. Climate Change

    Water is a greater absorber of IR than CO2, it also makes up 4% of the air by volume. If 0.016% change in CO2 over 100 years can increase the temperature by 1 deg C, what is the effect of the 4% water vapour on the temperature? Also do you think that

    asked by Anon on July 15, 2018
  65. science

    use water displacement to find the volume of four marbles in ml

    asked by gina on August 30, 2008
  66. Chemistry

    what is the percent by volume of 15.0 mL of ethanol in 0.250 L of water?

    asked by LD on October 28, 2010
  67. chemistry

    1.0 of a 4.0 solution is added to water so that the final volume is 8.0 .

    asked by tasha on May 25, 2010
  68. chemistry

    how do you calculte the volume of a single drop of water??

    asked by teresa on September 9, 2011
  69. Physics

    what is the volume of water displaced for 1.1 of pure gold.

    asked by Era on March 2, 2013
  70. Physics

    magine a landing craft approaching the surface of Callisto, one of Jupiter's moons. If the engine provides an upward force (thrust) of 3270 N, the craft descends at constant speed; if the engine provides only 2190 N, the craft accelerates downward at 40

    asked by COFFEE on February 4, 2007
  71. Physics

    Can you please show all your work so that I can understand how the problem is solved? In the Challenger Deep of the Marianas Trench, the depth of water is 10.9 km and the pressure is 1.16 x 10^8 Pa. a) if a cubic meter of sea water is taken from the

    asked by Amanda on July 13, 2010
  72. chemistry

    When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17 degrees C. Calculate delta H of this reaction. (Assume that the total volume is the sum of the individual volumes and that density

    asked by patrick on October 16, 2015
  73. chemistry

    When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17 degrees C. Calculate delta H of this reaction. (Assume that the total volume is the sum of the individual volumes and that density

    asked by patrick on October 15, 2015
  74. chemistry

    When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17 degrees C. Calculate delta H of this reaction. (Assume that the total volume is the sum of the individual volumes and that density

    asked by patrick on October 16, 2015
  75. Chemistry

    A quantity of sulfuric acid is added to 100. mL of water. The final volume of the solution is 111 mL and has a density of 1.14 g/mL. What mass of acid was added? Assume the density of the water is 1.00 g/mL.

    asked by john on May 6, 2011
  76. chemistry

    50cm3 of hydrogen is collected over water at 17 degree celsius and 750 mm Hg pressure.Calculate the volume of dry gas at S.T.P.The water vapour pressure at 17 degree celsius is 14 mm Hg?

    asked by j on May 29, 2015
  77. physics

    A glass cylinder with a diameter 12 cm has initial water level at 120 cm. When a ball is totally immersed in it,the water level rises to 135 cm. What is the volume of the ball immersed?

    asked by aiminath on February 3, 2017
  78. physics

    A glass cylinder with A diameter 12 cm has initial water level at 120 cm. When a ball I totally immersed in it,the water level rises to 135 cm. What is the volume of the ball immersed?

    asked by aiminath on February 3, 2017
  79. Chemistry

    If there were two solutions- one with areagent(100% pure) mixed in water and the other solution containing the same reagent (99.9% pure) mixed in equal volume of water. How significant would the difference in concentration be between these two solutions?

    asked by Andrew on March 30, 2010
  80. AP CHEM

    Please help me with these AP CHEM homework problems problems and show me the steps: Mass per Volume Results for Titrations: Determine the mass per volume results requested in the following problems. #23) A particular water supply is found to contain

    asked by shylo on July 31, 2008
  81. Physics

    Two steam locomotives are approaching each other, each at 30 mi/hr, heading for a sure head-on collision. A rhinoceros beetle, who flies with a constant speed of 40 mi/hr, leaves the front of the first locomotive when the engines are just 2.000 miles

    asked by hi on October 16, 2014
  82. physics

    Two steam locomotives are approaching each other, each at 30 mi/hr, heading for a sure head-on collision. A rhinoceros beetle, who flies with a constant speed of 35 mi/hr, leaves the front of the first locomotive when the engines are just 2.000 miles

    asked by Anonymous on October 26, 2012
  83. chemistry

    a bottle has mass 81.509g when empty. a bottle with pure water has mass 610.5g (density=1.00g/mL). a bottle with isopropanol has mass 498.8g. what is the density of isopropanol? mass of water = 610.5 g - 81.50 g. Volume of water = mass/density. mass

    asked by Hawk on June 22, 2006
  84. physics

    2.A solid iron cylinder with a diameter of 150mm a height of 1m and a density of 7860 kg/m^3 is suspended in fresh water (density of fresh water is 1000 kg/m^3) calculate the tension in the supporting cable when two thirds of the volume of the cylinder is

    asked by moody on January 19, 2014
  85. Chem

    I did this experiment where I filled a graduated cylinder with water. The I put a stopper on it and put it under water and removed the stopper. The with a modified lighter (that wouldn't release sparks) I added butane gas. I got the following results: mass

    asked by Lena on December 12, 2008
  86. Physics

    A 60.0 kg runner expends 355 W of power while running a marathon. Assuming that 8.00% of the energy is delivered to the muscle tissue and that the excess energy is primarily removed from the body by sweating, determine the volume of bodily fluid (assume it

    asked by Kelsey on May 1, 2010
  87. physics

    The record for the largest glass bottle was set in 1992 by a team in New Jersey- they blew a bottle wit a a volume of 193 U.S. fluid gallons. a)How much short of 1.0 million cubic centimeters is that? b)If the bottle were filled with water at the leisurely

    asked by Brent on August 22, 2010
  88. Law

    If the above-described drug operation had been scheduled at a fully operational airfield staffed with airport personnel, it may be most effective to have law enforcement blend in with, or dress like, airport workers. This is an example of __________

    asked by Amy on November 11, 2013
  89. chemistry

    tell the taste of these types of water well water mineral water fresh water tap water earated water?

    asked by saim on May 14, 2011
  90. Astronomy

    The volume of a ball is given in terms of its radius by V=4π3R3. Use this to find the average density of Saturn, i.e. the mass per unit volume. Use Earth’s mass in kg from the Table of Constants to express your answer in kgm3. Note for comparison that

    asked by sam on December 23, 2012
  91. physics

    A catapult launches a rocket at an angle of 47.5° above the horizontal with an initial speed of 109 m/s. The rocket engine immediately starts a burn, and for 2.49 s the rocket moves along its initial line of motion with an acceleration of 30 m/s2. Then

    asked by tina on April 26, 2012
  92. physics

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

    asked by anonymous on February 9, 2007
  93. Chemistry

    0.0337g of a volatile liquid when vaporized completely at 100Pa and 300K occupied a volume of 20cm3. When this volume of vapor was completely burnt in an excess of oxygen, 40cm3 of carbon dioxide and 20cm3 of water vapor were formed. All volumes being

    asked by Shaun on February 18, 2012
  94. chemistry help DR. BOB

    When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17 degrees C. Calculate delta H of this reaction. (Assume that the total volume is the sum of the individual volumes and that density

    asked by patrick on October 16, 2015
  95. chemistry/check my work I have to submit today

    When 27.20mL of .5 M H2SO4 is added to 27.20 of 1M KOH in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17 degrees C. Calculate delta H of this reaction. (Assume that the total volume is the sum of the individual volumes and that density

    asked by patrick on October 16, 2015
  96. URGENT HELP: calculus - limits at inifinity

    1.The efficiency of an internal combustion engine is: efficiency (%) = 100 [1 - (1/(x/y)^c)] where x/y is the ratio of the uncompressed gas to the compressed gas and C is a positive constant dependent on the engine design. Find the LIMIT of the efficiency

    asked by Anonymous on December 14, 2007
  97. Chemistry

    Prepare a theoretical titration curve for titration of 25.0 mL of 0.1037 formic acid (HCOOH; pKa = 3.75) solution (diluted to 100 mL volume with deionized water) by 0.0964 M solution of KOH. I have to determine volume of KOH needed to reach equivalence

    asked by Clint on March 5, 2012
  98. Chemistry Help

    At room temperature, the surface tension of water is 72.0 mJ·m^–2. What is the energy required to change a spherical drop of water with a diameter of 1.80 mm to three smaller spherical drops of equal size? The surface area of a sphere of radius r is

    asked by Anonymous on November 18, 2012
  99. chemistry

    Nitric acid can be produced by the reaction of gaseous nitrogen dioxide with water. 3 NO2(g) + H2O(ℓ) −→ 2 HNO3(ℓ) + NO(g) If 900 L of NO2 gas react with water, what volume of NO gas will be produced? Assume the gases are measured under the same

    asked by Anonymous on December 3, 2016
  100. Chemistry

    At room temperature, the surface tension of water is 72.0 mJ·m^–2. What is the energy required to change a spherical drop of water with a diameter of 1.80 mm to three smaller spherical drops of equal size? The surface area of a sphere of radius r is

    asked by Anonymous on November 14, 2012