1. physic

    c. A 2 kg block of ice has been stored in a chiller at a constant 0°C. In order to carry out an investigation, the block of ice needs to be turned into water at a temperature of 75°C. Calculate how much heat energy is required to change the block of ice

    asked by Albert Einstein on June 22, 2017
  2. Math

    There were 35 gallons of water in a tank and 4.5 gallons of water in a pail. An equal amount of water was poured into the tank and the pail. The ratio of the water in the tank to that pail became 7:2. a. how much water was in the pail at the end? b.how

    asked by UnKnown on August 18, 2015
  3. math

    There were 35 gallons of water in a tank and 4.5 gallons of water in a pail. An equal amount of water was poured into the tank and the pail. The ratio of the water in the tank that in the pail became 7:2. (a) How much water was in the pail in the end? (b)

    asked by lillyyy on July 28, 2018
  4. math

    There were 35 gallons of water in a tank and 4.5 gallons of water in a pail. An equal amount of water was poured into a tank and the pail. The ratio of the water in the tank to the pail became 7:2. a) How much water was in the pail in the end? b) How much

    asked by Emilyyyyyyyyyyy on May 5, 2016
  5. Physics

    what is the general relationship between the density of solids and the density of liquids? Are you talking about the density of substance X in the solid state vs the density of the same substance in the liquid state. GENERALLY, solids have a higher density

    asked by Katrina on October 2, 2006
  6. Science (Physics)

    A motorist driving a 1200-kg car on level ground accelerates from 20.0 m/s to 30.0 m/s in a time of 5.0s. Neglecting friction and air resistance, determine the average mechanical power in watts the engine must supply during this time interval.

    asked by Anonymous on March 27, 2011
  7. Physics

    A motorist driving a 1200-kg car on level ground accelerates from 20.0 m/s to 30.0 m/s in a time of 5.0s. Neglecting friction and air resistance, determine the average mechanical power in watts the engine must supply during this time interval.

    asked by Anonymous on March 27, 2011
  8. phys3

    A motorist driving a 1100-kg car on level ground accelerates from 20.0 m/s to 30.0 m/s in a time of 5.6 s. Neglecting friction and air resistance, determine the average mechanical power in watts the engine must supply during this time interval.

    asked by opp on February 27, 2012
  9. Physics

    A motorist driving a 1200-kg car on level ground accelerates from 20.0 m/s to 30.0 m/s in a time of 5.0s. Neglecting friction and air resistance, determine the average mechanical power in watts the engine must supply during this time interval.

    asked by Work needed! on March 26, 2011
  10. Physics

    110 tonne steam engine uses a force of 400 kN to pull two coal trucks (each with a mass of 45 tonnes) up a 3.00° degree incline. If the coefficient of friction involved is 0.080, determine the tension, T, in the coupling between the trucks.

    asked by MOyahabo on April 1, 2012
  11. Physics

    A car with a mass of 1500kg starts from rest and accelerates to a speed of 18m/s in 12s. Assume that the force of resistance remains constant at 400N during this time. What is the average power developed by the car's engine?

    asked by Anonymous on December 10, 2011
  12. English

    Please Check, Thank You! When choosing your search strategy for a search engine, it's best to A. Combine keywords into phrases by using quotation marks B. Enter the least important word first C. use verbs, articles, and capitals D. Ignore alternate

    asked by Kourtney on March 31, 2012
  13. Physics Help Please!!!! Urgent!!

    In an experiment, a boar (2600 kg) slows down from 11 m/s to 8 m/s in 5 sec when the engine is stopped. a) Determine the drag force. b) Using this information, what is a good approximation of the forward thrust force needed to keep the boat cruising at a

    asked by Jesicca on October 16, 2014
  14. AP Physics

    A car with a mass of 1200 kg kg starts from rest and accelerates to a speed of 12 m/s in 12.2 s. Assume that the force of resistance remains constant at 328 N during this time. What is the average power developed by the car’s engine? Answer in units of

    asked by Anonymous on April 26, 2016
  15. physics

    0.1kg of ice initially at a temperature of -10 degrees Celsius is added to a cup with .5kg of water initially at 20 degrees Celsius. The water and ice are isolated thermally from their surroundings. The specific heat of ice is 2000 J/kgoC, the specific

    asked by Raquel on November 18, 2010
  16. Chemistry

    KClO3 decomposes in the presence of MnO2 to form oxygen gas, collected over H2O at 23.0 degrees C and a barometric pressure of 754.2 torr, as described in the experimental description. After the pressure of the oxygen gas is equalized with atmospheric

    asked by Anonymous on July 9, 2008
  17. physics

    A car with a mass of 1000kg is travelling at a constant velocity. The force from the engine is 200Newtons. Calculate the acceleration of the car using the formula f=ma. How long will it take this car to travel 0-60 mph (n.b. 1mph = 0.45m/s)

    asked by j on May 16, 2013
  18. physics

    a diesel engine rapidly compresses air in its combustion chambers. while this happens it squirtsa fine spray of diesel fuel into the chamber. explain why the diesel ignites. can someone please help? Compressing gases heats them.

    asked by Pauline on May 3, 2007
  19. Physics

    A rocket with a mass of 345 kg is launched vertically. the engine produces a thrust of 17000 N. Neglect air resistance. a. How would I determine the weight of the rocket? b. What is the net force being applied to the rocket?

    asked by Krista on November 24, 2009
  20. geography

    how much water do oyu need in wheat Please explain your question. Are you asking how much water is needed for wheat to grow? Or are you asking for the water content of wheat grains?

    asked by michelle on February 1, 2007
  21. math, please help!!!!

    Let t be time in seconds and let r(t) be the rate, in gallons per second, that water enters a reservoir: r(t)=700−40t. a) For 0≤t≤30, when does the reservoir have the most water? b) For 0≤t≤30, when does the reservoir have the least water

    asked by Maria on September 13, 2013
  22. math

    Let t be time in seconds and let r(t) be the rate, in gallons per second, that water enters a reservoir: r(t)=700−40t. a) For 0≤t≤30, when does the reservoir have the most water? b) For 0≤t≤30, when does the reservoir have the least water

    asked by Maria on September 13, 2013
  23. pre calc

    Let t be time in seconds and let r(t) be the rate, in gallons per second, that water enters a reservoir: r(t)=700−40t. a) For 0≤t≤30, when does the reservoir have the most water? b) For 0≤t≤30, when does the reservoir have the least water?

    asked by charlotte on September 13, 2013
  24. Physics

    Rain is falling steadily but there is no wind. You are in an automobile that moves on a straight, flat highway at a constant speed of 80 km/hr. You see from the drops on the side window that the rain is falling at an angle of 58° measured from vertical

    asked by josephz on September 21, 2012
  25. Physics (algebra-based)

    A child holds a candy bar 13.4 cm in front of the convex side-view mirror of an automobile. The image height is reduced by one fifth. What is the radius of curvature of the mirror? Answer in units of cm. I did 1/5=-image distance (i)/13.4-->i=-2.68

    asked by Rebecca on December 2, 2013
  26. ap chemistry

    A 115 mg sample of eugenol, the compound responsible for the odor of cloves, was placed in an evacuated flask with a volume of 500 mL at 280C. After the eugenol completely evap- orated, the pressure that it exerted in the flask under those conditions was

    asked by cheri on February 10, 2013
  27. chemistry

    In a constant-pressure calorimeter, 60.0 mL of 0.930 M H2SO4 was added to 60.0 mL of 0.320 M NaOH. The reaction caused the temperature of the solution to rise from 22.68 °C to 24.86 °C. If the solution has the same density and specific heat as water

    asked by Amy on May 18, 2016
  28. physics

    Firemen are shooting a stream of water at a burning building. A high-pressure hose shoots out the water with a speed of 24.0{\rm m}/{\rm s} as it leaves the hose nozzle. Once it leaves the hose, the water moves in projectile motion. The firemen adjust the

    asked by corrina on January 26, 2013
  29. help physcis

    At what cold-reservoir temperature (in degree C) would a Carnot engine with a hot-reservoir temperature of 350degree C have an efficiency of 70%?

    asked by Naso on March 31, 2010
  30. Aviation

    Does the engine of a Cessna 162 have an alternate air source? How many fuel pumps does the Cessna 162 have? Your help is very much appreciated!

    asked by Heather on May 31, 2013
  31. physics

    A 1200W engine supplies a force of 90N to move an object at a constant velocity. With what velocity will it move?

    asked by alice on August 15, 2013
  32. MATH I NEED HELP ASAP

    1.Use the formula V=lwh to find the volume of a rectangular prism with the following dimentions: Lenght=5m width=2m height=10m A. V=14 in.^3******* B. V=31 in.^3 C. V=49 in.^3 D. V=84 in.^3 2. Use the formula V=lwh to find the volume of a rectangular prism

    asked by Yolo on March 18, 2018
  33. Physics

    A pump is required to lift a mass of 750kg of water per minute from a well of depth 13.2m and eject it with a speed of 17.4m/s. A) How much work is done per minute in lifting the water? B) How much in giving the water the kinetic energy it has when

    asked by Garrett on March 17, 2014
  34. alg.

    A fountain shoots water from a nozzle at its base. The height h, in feet, of the water above the ground t seconds after it leaves the nozzle is given by the function h(t) = –16t2 + 17t + 8. What is the maximum height of the water? Round to the nearest

    asked by kellyM on April 8, 2014
  35. Chemistry

    Assume you are performing the calibration step and you begin with 70 g of water at 20*C and 70 g of water at 80*C. After adding the two portions of water into your calorimeter setup and following the procedure outlined in the experiment, you determine the

    asked by Rachel on April 5, 2017
  36. physics

    A 53.0-kg person jumps from rest off a 12.0-m-high tower straight down into the water. Neglect air resistance. She comes to rest 3.00 m under the surface of the water. Determine the magnitude of the average force that the water exerts on the diver. This

    asked by sal on July 10, 2013
  37. science

    we have a project. there are different kind of topics. mine is protecting our water. i had to find 10 questions answer. i couldn't find 2. they are: 1. why is water important to protect? 2. what are some negative and positive affect of protecting our

    asked by Shweta on March 30, 2011
  38. Chemistry

    45.0g Pb at 115C is added to 125 g of water at 25.0C in a well insulated calorimeter. What is trhe final temperature in C for the water? The Specific heat of lead is 0.129J/gC and the specific heat of water is 4.184 J/gC. Could someone please explain the

    asked by General Batman on June 25, 2017
  39. Physics

    What is the total charge on all of the electrons in two liters, 2 kg, of water? One mole of water has a mass of 18 g and each molecule of water contains 10 electrons. Way I worked problem: (2kg)(1000g/1kg)(1mol/18g)(10e-/1mol)(-1.60e-19/1e-) What I did do

    asked by Jane on January 14, 2008
  40. Physics

    Blue light (λ vac= 440 nm) shines onto a puddle of water (n water = 1.33). There is a thin layer of oil (n = 1.47) on top of this water. What is the minimum thickness of the oil if there is constructive interference for the light? I tried 2t=(m+

    asked by B on April 5, 2016
  41. Physics

    A swimmer dives off a block into the water. The block is 31 inches above the surface of the water. Using projectile motion, what angle did they dive to reach point A on the surface of the water? I don't know what the variables stand for in this problem. Xf

    asked by Samantha on May 2, 2016
  42. CHEM-vaporization

    A 50.0g piece of iron an 152°C is dropped into 20.0g H2O(l) at 89°C in an open, thermally insulated container. How much water would you expect to vaporize, assuming no water splashes out? The specific heats of iron and water are 0.45 and 4.21

    asked by - on February 6, 2009
  43. RATE, DISTANCE, TIME

    TIM PADDLED HIS KAYAK 12 KM UPSTREAM AGAINST A 3 KM/H CURRENT AND BACK AGAIN IN 5 HR 20 MINUTES. iN THAT TIME HOW FAR COULD HE HAVE PADDLED IN STILL WATER 12/(v+3) + 12/(v-3) = 5.33 hours Solve for this speed in still water, v. 12(v-3) + 12(v+3) = 5.33

    asked by CINDY on December 21, 2006
  44. Calculus

    A tank in the form of an inverted cone having an altitude of 2 meters and a base radius of 50 cm. Water if flowing into the tank at the rate of 10 cube centimeters/sec. How fast is the water level rising when the water level is 80 cm deep?

    asked by Pauline on March 1, 2016
  45. Physics

    Which requires more energy: to raise 1 kg of liquid water from 0 to 100 degrees (Celsius) or to turn that water to steam after it hits 100 degrees? Assume the specific heat capacity of water is approximately independent of temperature.

    asked by Anon on November 28, 2012
  46. Physics

    A cylinder has a diameter of 15cm. The water level in the cylinder is maintained at a constant height of .45m. If the diameter of the spout pipe is .50cm how high is the vertical stream of water?Assume water to be an ideal fluid

    asked by Lucy on April 11, 2018
  47. Chemistry

    The vapour pressure of pure water at 110 c is 1070 torr.A soln of ethyleneglycol in water has vapour pressure of 1 atm. Assuming that raoult's law is obeyed, what is the mole fraction of ethylene glycol in water?

    asked by Ethio on October 30, 2011
  48. Biology

    What will happen when deionized water is added to red blood cells and then left to sit for 15 minutes? Will the blood cells mix with the water immediately and make a paler solution or will they be more dense than the water and sink to the bottom?

    asked by Ejda on October 2, 2007
  49. chemistry

    does alka seltzer dissolve faster in hot water or cold water experimental errors that could take place? could it be the same water temperature different time that alka seltzer is placed

    asked by anonymous on September 20, 2014
  50. calculus

    Water is poured into a conical tank 6m across the top and 8m deep at the rate of 10m/min. How fast is the water level rising when the water in the tank is 5m deep?

    asked by Arvin on November 3, 2012
  51. Physics

    A point source of light is 96.7 cm below the surface of a body of water. Find the diameter of the circle at the surface through which light emerges from the water. Water has an index of refraction of 1.33.

    asked by Chirayu on May 13, 2009
  52. ***CHEMISTRY***

    Two pans of water are on different burners of the same stove. One pan of water is boiling vigorously while the other is boiling gently. Compare the temperature of the water in the two pans. (Are the temperatures the same, different, how?) ****PLEASE HELP!!

    asked by BRITTANY! on March 8, 2009
  53. Science

    24.62 g of nickel heated and then immersed in 200ml of water. the temperature of the water rose 22.50c to 32.20c.The specific heat of NI is .470J/g*C. What is the temperature of the Ni before it is immersed in the water?

    asked by Me on October 10, 2012
  54. chem - dry ice activity

    when you add dry ice to water, it seems to boil. why is that? You are then transfering heat from the liquid water to the solid dry ice, which sublimes gaseous CO2 into the water.

    asked by janis on April 22, 2007
  55. Physical

    A cubical block of wood of side 0.5 m floats in water. Given that the densities of wood and water are 800 and 1000 kg/m3 respectively Calculate the depth of the block immersed in water.

    asked by Edward on November 1, 2016
  56. Chemistry

    A 300 Calorie donut is used to heat 5.0 kg of water. If the initial temperature of the water is 20 degrees C what will the final temperature of the water be? Assume no heat loss to the surroundings

    asked by Kayla on March 11, 2009
  57. Science question

    Will the evaporation of ocean water at the equator cause the ocean water to become more or less salty, why? Wouldn't it be because it evaporates, it will be more salty cause the fresh water is evaporating and the salt is left behind? Thanks -Allyson

    asked by Allyson on March 29, 2011
  58. Biology

    What will happen to a turgid plant cell with an initial water potential of 0.5 MPa when dropped into a large beaker of water and solute that has a water potential of -1.5 MPa?

    asked by Leslie on March 27, 2011
  59. Geometry

    A flush tank on a toliet is rectangular with dimensions of 21 in. by 6.5 in. and contains water to a depth of 12 in. How many gallons of water per flush will be saved if the depth of water is reduced by one third? (231 in^3 per gallon.)

    asked by Ben on May 5, 2012
  60. Calculus

    Water is being poured into an inverted cone(vertex down) of radius 4 in and height 10 in at a rate of 3 in^3/sec. Find the rate at which the height of the water is increasing when the water is 5 in high.

    asked by Trevor on February 28, 2013
  61. pre calc

    Water is poured into a container in the sape of a right circlar cone with raiud 4t an heigh 16 feet. Express the volue (V) of the water in the cone as a funtio of the heigh (h) of the water. thanks

    asked by Rebekah on September 19, 2012
  62. chemistry homework help!!

    if you have 380.0mL of water at 25.00 degrees Celsius and add 140mL of water at 95.00 degrees Celsius, what is the final temperature of the mixture? Use 1.00 g/mol as the density of water.

    asked by danielle on February 26, 2012
  63. chemistry

    25.0 mL tap water is titrated with 0.00500 M EDTA 7.95mL EDTA is required for complete reaction with water hardness what is the molarity of the total water hardness

    asked by Kellie on April 26, 2012
  64. Physics multiple choice questions

    1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy -->

    asked by Jessica on April 8, 2014
  65. Physics multiple choice questions

    1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy -->

    asked by Jessica on April 7, 2014
  66. calculus

    You are visiting your friend Fabio’s house. You find that, as a joke, he filled his swimming pool with Kool-Aid, which dissolved perfectly into the water. However, now that you want to swim, you must remove all of the Kool-Aid contaminated water. The

    asked by Sam on March 10, 2017
  67. CHE 111-03L

    The following system is at equilibrium: 2X(s)+4Y(g)⇌Z(g) Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or no shift in the direction of the net reaction. Half the Volume Remove Some X Double the Volume

    asked by Peter on October 2, 2016
  68. chemistry

    A gas is compressed from an initial volume of 5.60 L to a final volume of 1.22 L by an external pressure of 1.00 atm. During the compression the gas releases 128 J of heat. What is the change in internal energy of the gas?

    asked by jesse on March 20, 2012
  69. physics

    A fire fighter is trying to shoot water straight to the window located at the second floor of a house 6 m above the ground. The distance between the fire fighter and the house is 8 m and he holds the fire hose 1.8 m above the ground. The water leaves the

    asked by Phillip on September 20, 2015
  70. chemistry

    What is the volume of 6M H2SO4 required by the balanced equation to react with the CuO to produce 0.025 moles of copper(ii) sulfate. Report the volume needed BEFORE allowing for excess in milliliters to two significant figures. Don not include units in the

    asked by tj on October 2, 2014
  71. Science

    Say we have a jar of water, Is the angle of incidence, the angle that the the light enters the water, the angle above the water or the angle below the water?

    asked by Reeses on April 9, 2017
  72. math

    an 8oz cup of water contains 7.5 x 10^24 water molecules. the ocean contains 5.4 x 10^46 water molecules. about how many cups of water are in the ocean.

    asked by k on October 17, 2008
  73. Physics

    A raindrop (mass 1.00 g) is travelling at a speed of 40m/s when it hits the surface of 100 g of water contained in a drinking glass. What is the change in temperature of the water in the glass if we assume that a) all the kinetic energy of the raindrop is

    asked by Mark on April 7, 2011
  74. Chemistry

    Given that the solubility of sodium chloride is 36 grams per 100 grams of water. Which of the following solutions would be considered supersaturated? A. dissolve 5.8 moles of NaCl in 1 L of water B. dissolve 1.85 moles of NaCl in 300 ml of water C.

    asked by Coug on November 22, 2009
  75. physics

    A particular spiral galaxy can be approximated by a thin disk-like volume 35 Thousand Light Years in radius and 8 Hundred Light Years thick. If this Galaxy contains 790 Billion stars, estimate the average distance between the stars in this galaxy. Hint:

    asked by Space problem, show work on January 28, 2017
  76. physics

    A particular spiral galaxy can be approximated by a thin disk-like volume 35 Thousand Light Years in radius and 8 Hundred Light Years thick. If this Galaxy contains 790 Billion stars, estimate the average distance between the stars in this galaxy. Hint:

    asked by humbrey on January 28, 2017
  77. physics

    Water is circulating through a closed system of pipes in a two- floor apartment. On the first floor, the water has a gauge pressure of 3.4*10^5 Pa and a speed of 2.1 m/s. However, on the second floor, which is 4.0 m higher, the speed of the water is 3.7

    asked by Fluids, Pressure, Bernoulli’s Equation on April 17, 2012
  78. Chemistry

    A 0.1873 g sample of a pure, solid acid, H2X was dissolved in water and titrated with 0.1052 M NaOH solution. The balanced equation for the neutralization reaction occurring is H2X(aq) + 2NaOH(aq) ¨ Na2X(aq) + 2H2O(l) If the molar mass of H2X is 85.00

    asked by Lauren on May 12, 2011
  79. Math

    On an automobile assembly line, every third car is green. Every fourth car is a convertible. a) How many cars are out of the first 100 will be convertibles? b) Which number of car is First Green convertibles? Grade 7 Math Please answer, ASAP.

    asked by Vince on September 8, 2016
  80. IT

    9. Draw the flowchart or write the pseudocode for an application that allows a user to enter an automobile loan balance. Assume that the user pays 1/36 of the balance each month, and display the new balance after one month and after two months

    asked by jacob on September 5, 2012
  81. economics

    1) Recent trends toward trade restrictions have been to a) lower only those trade barriers related to technology. b)shield a country's automobile industries. c)increase trade barriers. d) decrease trade barriers

    asked by kelly on May 22, 2013
  82. physics

    a 1200kg car is moving at a steady speed of 25 m/s down a level road. The engine is exerting a steady force of 800N. What is the force of resistance the motor is overcoming?

    asked by Leanda on October 16, 2010
  83. Physics

    How long would it take a car engine, say 500 pounds of iron, to cool from 1,200 degrees F (exauhst manifold temp) to air ambient temp. of 75 degrees F.

    asked by David on August 11, 2012
  84. chemistry

    an engine operating between 100 degree celsius and 0 degree celsius takes 453.6 k cal of heat. The usefull work done by it is ? plz teach me the way of calculating it

    asked by star on June 3, 2012
  85. History

    Which accurately describe scientific advancements during the Renaissance?  (Select all that apply.) invention of the printing press invention of the microscope invention of the telescope invention of the steam engine i think its a,b,c

    asked by malia on October 13, 2017
  86. physics

    Using the inverse-square gravitational law, calculate the work required to lift a 1000-kg satellite from the earth's surface to an altitude of 100 mi and inject it into orbit at 17,500 mph. How long would a 300-hp engine have to be run to produce this much

    asked by paul smith on July 10, 2011
  87. English

    1. We can turn off the water when we are not using it. 1-1. We can turn off the water when we do not use it. 2. We can turn off the water when we are brushing teeth. 2-1. We can turn off the water when we do not brush teeth. ==================== Which ones

    asked by rfvv on April 14, 2015
  88. physics

    1. Where does sound travel fastest? water, salt water, steel, or wood 2. Does sound travel faster in salt water than water?

    asked by Sara on January 28, 2014
  89. commerce

    Prepare a project file on the following business industries of India (approximately one/two pages of information on each industry) a) Iron & Steel Industry b) Textile Industry c) Information Technology Industry d) Petroleum Industry e) Automobile Industry

    asked by Anonymous on July 6, 2017
  90. Chemistry

    A gas has a pressure of 4.62 atm when its volume is 2.33 L. If the temperature remains constant, what will the pressure be when the volume is changed to 1.03 L? Express the final pressure in mm Hg.

    asked by Suzanne on April 7, 2014
  91. Math

    The ratio of the sides of 2 similar cube dis 3:4 the smaller cube has a volume of 729 Wat is the volume of the larger cube

    asked by Gul on April 25, 2016
  92. algebra

    A cylinder has a radius of 4x + 2 and a height of 5x + 4. Which polynomial in standard form best describes the total volume of the cylinder? Use the formula v = pi r^2 h for the volume of a cylinder.

    asked by jared on February 22, 2012
  93. AP Chemistry

    Determine the pH of the following solutions. 1) 0.600 M HCl 2) 0.052 moles of H2SO4 dissolved in 4.2 L of water. 3)5.6 grams HNO3 dissolved in 450 ml of water. 4) 2.5 grams of NaOH dissolved in 500 mL of water. 5) adding 2 grams NaH dissolved in 0.56 L of

    asked by Tyra on February 20, 2016
  94. Chemistry

    A sample of silver with a mass of 63.3g is heated to a temperature of 384.4 K and placed in a container water at 290.0K The final temperature of the silver and water is 292.4K assuming no heat loss, what mass of water was in the container? the specific

    asked by Anonymous on February 22, 2010
  95. AP Chemistry

    Determine the pH of the following solutions. 1) 0.600 M HCl 2) 0.052 moles of H2SO4 dissolved in 4.2 L of water. 3)5.6 grams HNO3 dissolved in 450 ml of water. 4) 2.5 grams of NaOH dissolved in 500 mL of water. 5) adding 2 grams NaH dissolved in 0.56 L of

    asked by Tyra on February 20, 2016
  96. Chemistry

    I don't get how the intermolecular forces (Hydrogen bonding) relates to the heating curve of water. I read some stuff on intermolecular force for Hydrogen bonding and it said that the force between water molecules raise the boiling point of water. So would

    asked by Amy~ on June 11, 2010
  97. Calculus

    When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV^{1.4}=C where C is a constant. Suppose that at a certain instant the volume is 530 cubic centimeters and the pressure is 97 kPa and

    asked by Thomas on June 19, 2010
  98. History

    The fate of the Owens valley resulted in all of the following except a. the Owens River and Lake dried up. b. farmers no longer had adequate water for irrigation c. fire destroyed much of the towns of Lone Pine and Bishop d. within a few years Los Angeles

    asked by A on December 17, 2015
  99. Calculus

    An open hemispherical bowl of radius R is slowly draining through a small hole of radius r in the bottom of the bowl. Let g be the acceleration due to gravity and y be the depth of the water (which means the distance from the water surface to the hole).

    asked by chamy on April 8, 2012
  100. chem

    A sample of hydrogen with a volume of 800 mL exerts a pressure of 620 mm Hg at 5°C. Approximately what volume will it occupy at standard temperature and pressure? V2=800x620x273/760x278 =135,408,000/211,280 V2=640.9 mL Can someone tell me if I'm correct

    asked by t on May 19, 2015