1. Chemistry

    Consider 57.5 mL of a solution of weak acid HA (Ka = 1.00 10-6), which has a pH of 3.800. What volume of water must be added to make the pH = 6.000? i made a ka for both of them to find out HA and i got .025M for fhte first one and 1E-6M for the second one

    asked by Carry on February 26, 2009
  2. physics

    After a shipwreck, a solid steel spoon lies at the bottom of the ocean, 5.75km below the surface. What's the water pressure at that depth? Find the fractional volume change in the spoon due to compression forces.

    asked by Tyler on December 11, 2011
  3. Chemistry - Heat of Fusion of Ice

    Conclusion question(s) from a lab we did to find the heat of fusion of ice: Does the value obtained for the molar heat of fusion depend on the volume of water used? Does it depend on the mass of ice melted? Does it depend on the final temperature of the

    asked by J.M. on October 1, 2006
  4. Math

    Byron’s house has a roof with dimensions shown. (Roof: 1m Height, 7m Hypotenuses, 12m length) He knows that the average rainfall in his suburb is 30cm per year. Byron would like to install a cylindrical rainwater tank to hold the water that runs off the

    asked by Alex on June 14, 2015
  5. Math

    Byron’s house has a roof with dimensions shown. (Roof: 1m Height, 7m Hypotenuses, 12m length) He knows that the average rainfall in his suburb is 30cm per year. Byron would like to install a cylindrical rainwater tank to hold the water that runs off the

    asked by David on March 21, 2017
  6. Physics

    Boyle's Law says that the volume of a gas varies inversely with the pressure. When the volume of a certain gas is 4L , the pressure is 165kPa (kilopascals). What is the volume when the pressure is 60kPa?

    asked by Rachal on May 23, 2011
  7. Chemistry

    Boyle's Law says that the volume of a gas varies inversely with the pressure. When the volume of a certain gas is 2 L, the pressure is 1065 kPa (kilopascals). What is the pressure when the volume is 15 L ?

    asked by Marie on February 8, 2016
  8. Physics

    Boyle's Law says that the volume of a gas varies inversely with the pressure. When the volume of a certain gas is 2 L, the pressure is 1065 kPa (kilopascals). What is the pressure when the volume is 15 L?

    asked by Marie on February 8, 2016
  9. Chemistry

    A 25.00mL sample of a household cleaning solution was diluted to 250.0mL in a volumetric flask. A 50.00mL aliquot of this solution required 40.38mL of 0.2506 M HCl to reach a bromocresol green end point. Calculate the weight/volume percentage of NH3 in the

    asked by Ellen on March 28, 2012
  10. physics

    Water waves in a shallow dish are 5.0 cm long. At one point, the water moves up and down at a rate of 5.2 oscillations per second. (a) What is the speed of the water waves? (b) What is the period of the water waves?

    asked by phillup on April 22, 2008
  11. math

    How many pounds of candy selling for $2.25 a pound should be added to four pounds of candy selling for $4 a pound to create a blend, which will sell for $3.25 a pound?

    asked by JJ on November 1, 2012
  12. Dynamics

    A 1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s. If the driver wishes to stop his car in a distance of 5m,determine the frictional force at pavement which must be supplied by rear wheels.

    asked by Anonymous on July 22, 2013
  13. Dynamics

    1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s. if the driver wishes to stop his car in a distance of 5m, determine the frictional force at pavement which must be supplied by rear wheels

    asked by basha on August 4, 2012
  14. dynamics

    a 1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s if the driver wishes to stop his car in a distance of a 5m, determine the frictional force at pavement which must be supplied by rear wheels.

    asked by Anonymous on July 22, 2013
  15. Ethics and Tech

    Computer simulations can: A. accurately predict the weather a month in advance. B. save automobile manufacturers time and money as they develop new cars. C. prove our planet is overpopulated. D. All of the above Im confused between A and D

    asked by Amy on April 21, 2015
  16. ECONOMICS

    UrGENT, PLS ANSWER MY QUESTION IMMEDIATELY!!! For each pair of commodities,state which do you think is more elastic and give your reasons:perfume and salt; penicillin and icecream; automobiles and automobile tires.

    asked by IVY on January 19, 2011
  17. social studies

    which of the following is an example of a natural hazard of the type and magnitude of those referred to in the article? 1)an automobile accident 2) a rain shower 3)a volcanic eruption 4) a falling tree limb 5)a fire in a restaurant please help meeeee

    asked by mirlaine on December 19, 2012
  18. Dynamics

    A 1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s. If the driver wishes to stop his car in a distance of 5m,determine the frictional force at pavement which must be supplied by rear wheels.

    asked by Anonymous on July 22, 2013
  19. dynamics

    the 1500 kg automobile is travelling up the 20 degree inclined at a speed of 6 m/s , if the driver wishes to stop his car in a distance of 5m , determine the frictional force at the pavement which must be supplied by the rear wheels.

    asked by umesh on December 30, 2012
  20. Dynamics

    a 1500 kg automobile is traveling up to 20 degree incline at a speed of 6 m/s. if the driver wishes to stop his car in a distance of 5m, determine the frictional force at pavement which must be supplied by rear wheels

    asked by DHilsath on July 30, 2012
  21. chemistry (continued)

    i kinda understand waht you're saying. to be a bit more clear this is from a lab, and here are the volumes we retrieved: Volume of Concentrated NaOH soultion (mL) = 9.00 mL Concentration of Concentrated NaOH soultuon (M) = 6.00 M Volume of Stock Solution

    asked by Vanessa on October 31, 2008
  22. science --- check my answers!

    help pls asap!!!!! check my answers!!! 4.) A certain object has a volume of 25.0 mL and a mass of 100g. What is the density of the object? a)0.250 g/mL b) 4.00/mL*** c)125 g/mL d) 2500 g/mL 5.)Which of the following is a chemical property of aluminum?

    asked by TTR+S<3 on January 30, 2014
  23. Chemistry

    Pure water is added to 25.0 mL of a 1.00 M HCL solution. The new solution has a volume of 2.00 L. What is the pH of the new solution.

    asked by Derrick on May 1, 2012
  24. chemistry

    SOMEONE CAN PLZ EXPLAIN IN DETAIL HOW TO SOLVE THIS PROBLEM..THNKS Molar Volume of Sodium If you assume that an atom is a hard sphere, you can estimate the average volume of space it occupies using basic geometry. Question Estimate the volume, V , of a

    asked by unkname on November 9, 2008
  25. biology

    Trophic Level Cylinder Volume of H2O Volume of Oil Total Volume % Oil 1st 1000 ml 1000 ml 2nd 100 ml 100 ml 3rd 10 ml 10 ml

    asked by kiesha on August 9, 2012
  26. algebra

    Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.42 * 10^5 watts cm^2 what is the db?

    asked by lisa on November 11, 2013
  27. Algebra

    Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.50 * 10^5 watts cm^2 what is the db?

    asked by Roger on November 7, 2014
  28. Internet Basics

    Which of the following tools is best for accessing Web pages and connecting to the Internet? ISP Modem Search Engine Browser

    asked by Karin on May 24, 2010
  29. Physics

    A car weighing 1000kg is going up an incline with a slope of 2 in 25 at a steady speed of 18kmph.If g=10m/s2, the power of its engine is

    asked by Thousif on August 1, 2017
  30. PHYSICS

    A 60.0 kg rocket accelerates upward from rest reaching a height of 23.4 m in 3.0 seconds. what is the thrust force produced by the engine?

    asked by yasmeen on June 10, 2012
  31. chemistry

    10g of nacl were added to 10ml of water. the resulting solution was diluted to be a final volume of 250ml. Given the density of the solution is 0.9864g/ml. Calculate the molality of the solution. Who helps

    asked by Fai on December 25, 2012
  32. physics

    A 48-N object floats in a pool. If 75% of the volume of the object is immersed in the water, which statement is true about the buoyant force FB on the object? A. FB=48N B. FB=36N C. FB=64N D. FB=12N E. This is not possible to answer with the information

    asked by Idali on April 9, 2017
  33. Chemistry

    Ive been trying to do my chemistry homework for the past few hours and I keep getting some of the questions wrong. These are the 2 questions i am having trouble with. 1. If 0.582 L of gaseous CO2 measured at STP dissolved in 920 mL of water is produced

    asked by Dil on January 13, 2009
  34. Physics- Fluids

    Please help! Any advice is appreciated A water faucet in a house is h=8 m below the water surface in the local water tower. The radius of the orifice in the fully opened faucet is r=0.01 m. We assume non-viscous flow in this problem. a) How long does it

    asked by Jamie on November 30, 2016
  35. Science ms sue please help

    True or false during dry weather the water level in a small pond drops because of runoff. I think it's true but I'm not sure And in the water cycle water returns to earth as condensation usually in the form of rain or snow. Is that true? And when water

    asked by Gaby on October 24, 2013
  36. Physics

    Please help! Any advice is appreciated A water faucet in a house is h=8 m below the water surface in the local water tower. The radius of the orifice in the fully opened faucet is r=0.01 m. We assume non-viscous flow in this problem. a) How long does it

    asked by Jamie on November 30, 2016
  37. science

    Why is the sperm of a guy thick? The sperm are not thick. Semen — the chalky to milky white, semi-viscous fluid that is ejaculated — contains sperm plus fluids from the seminal vesicles (almost 1/3 of the volume) and the prostate (about 2/3 of the

    asked by brenda on November 21, 2006
  38. ENGLISH HELP?? 2 QUESTIONS.

    Can you answer two questions for me? Thanks!! "On average each of us consumes nearly 53 gallons of water a day at home. Some citizens of water-poor countries survive on as little as 4 gallons a day. We've grown used to seeing water flow out of our taps and

    asked by JJ on January 29, 2013
  39. chemistry -drbob222

    I'm not sure if my 1 and 2 are correct, and I don't know how to do 3, 4, and 5. Any help is appreciated! 1) You wish to extract an organic compound from an aqueous phase into an organic layer. to minimizing the number of transfer steps, would it be better

    asked by Anonymous on October 9, 2009
  40. physics

    a car of mass 1200 kg starts from rest, accelerates uniformly to a speed 4ms-1 in 2 seconds and continues moving at this constant speed in a horizontal straight line for additional 10s. the brakes are then applied and the car is brought to rest in 4s. a

    asked by maximilian on December 15, 2017
  41. SCIENCE (correct I hope)

    Freshwater Resource Challenge: aquifer depletion overdrawing surface water saltwater intrusion Ocean Water Resource Challenge: Flooding (flood)is an overflow of an expanse of water that submerges land, a deluge. water pollution is the contamination of

    asked by scooby91320002 on September 12, 2008
  42. Chem

    The correction terms in the Van der Waals equation for a gas are designed to correct A. the pressure term (P +a/V2) for the attractive forces between particles. B. the volume term (V-b) for the finite volume of the particles. C. For the volume term (b) not

    asked by Mendi on October 18, 2006
  43. Trigonometry

    A car with a wheel of radius 14 inches is moving with a speed of 55 mph. Find the angular speed of the automobile to the nearest mile per hour. I got 55/14

    asked by Joe Smith on February 12, 2013
  44. Science

    An automobile starting from rest at t0 = 0 at x0 = 0 undergoes constant acceleration in a straight line. It is observed to pass two marks separated by 64 m, the first at t = 8s and the second at t = 12s. What is the value of the acceleration?

    asked by Josoap on April 10, 2017
  45. Legally Drunk?

    I cannot find the answer, ANYWHERE: Most of the states in the United States use what ratio of Blood Alcohol Content to declare an automobile driver legally drunk?

    asked by Bryce on September 10, 2012
  46. Physics

    A person has a reasonable chance of surviving an automobile crash if the deceleration is no more than 30 "'s." What distance is traveled if the person is brought to rest at this rate from 115 ?

    asked by Daniel Limon on February 11, 2013
  47. physics

    An automobile starts from rest and 110 ft attains a speed of 30 mi/h. In what time has it traveled this distance and the is the acceleration? -when is the acceleration of the object positive and negative?

    asked by zianna on July 30, 2012
  48. Chemistry

    Consider the burning of LPG (propane C3H8)which produces carbon dioxide (CO2) and water vapor (H2O). The balanced chemical equation involving the reaction is C3H8+5O2= 3CO2+4H2O Suppose 1.5 moles of C3H8 will be used, assume the following: a. How many

    asked by Tsunayoshi on February 10, 2014
  49. chemistry

    A tank holds 52.9 cm3 of water. What is the volume in in3? (2.54 cm=1 in, Remember significant figures, but this answer does not need units, since the answer must be in in3)

    asked by Erica on September 14, 2015
  50. chemistry

    A 1.10- sample contains only glucose and sucrose . When the sample is dissolved in water to a total solution volume of 25.0 , the osmotic pressure of the solution is 3.78 at 298 .

    asked by bf on January 24, 2010
  51. Chemistry

    78 mL of a 1.60M solution is diluted to a volume of a 238mL. A 119-mL portion of that solution is diluted using 133 mL of water. What is the final concentration

    asked by Sam on April 13, 2012
  52. chemistry

    mass of empty flask plus stopper 36.765 g mass of stoppered flask plus water 65.264 g Temperature 24.8 C calculate the volume? need help please

    asked by finny on September 6, 2016
  53. chemist

    What is the concentration of the hydroxide ion in a solution if 0.12 mol of strontium hydroxide are dissolved in water and the final solution volume is 500. mL?

    asked by Linnessa on April 28, 2013
  54. physical science

    120ml of a solution whose concentration is 30g/ml was diluted with distilled water by raising its volume to 160cm3. Calculate the concentration of the new solution.

    asked by grace on February 25, 2012
  55. College Physics

    assuming that sea water has a density of 1.05 g/cm^3, what is the density of a submarine running submerged? wouldn't you need to know some other information; like the mass or volume of the submarine?

    asked by Amy on November 21, 2011
  56. chemistry

    what is the concentration of the hydroxide ion in a solution if .12 mol of strontium hydroxide are dissolved in water and the final solution volume is 500. mL?

    asked by samantha on December 8, 2012
  57. chemistry

    balanced equation =2 H(2)+ 1 O(2) -> 2H(2)O A. What mass of H2O would be produced from7.4 mg of O2 B. What is the volume of H2O would be produced from 7.4kg of O2. Density of water = 1.000g/ml

    asked by frank on September 20, 2014
  58. Physics

    One gram of water changes from liquid to solid at a constant pressure of 1.00 atm and a constant temperature of 0°C. In the process, the volume changes from 1.00 cm3 to 1.14 cm3

    asked by Mike on November 14, 2010
  59. gr9 science

    a bar of steel has a mass of 277 g and a volume of 35.5 cm3. What is the density of the bar?Will it float in water?Will it float in mercury? could u please help me with this question?:)

    asked by beccaa on September 23, 2009
  60. chemistry

    Why is it possible to float a pin on the surface of water? A. The molecules of water on the surface change bonding as they dry out. B. The density of the pin is less than that of the water's surface. C. The surface tension of the water is so low. D. The

    asked by Cortney on March 18, 2015
  61. algebra

    A perfume maker wishes to blend perfume valued at $ 410 an ounce with perfume worth $ 250 an ounce to obtain a mixture of 40 ounce worth $ 300 an ounce. How much of the $ 410 perfume should he use?

    asked by Melvin on December 3, 2017
  62. chemistry

    If 100 mL of a 3 M solution of sodium hydroxide is diluted to a total volume of 600 mL with distilled water, what will the final concentration of sodium hydroxide be?

    asked by Brittany on February 17, 2010
  63. math

    An open steel tank measures 2m by 2.5m by 3m.It holds 7500 ml of water. What is the volume of steel,in cubic metres,making up the sides of the tank ?

    asked by charlie on November 17, 2012
  64. chemistry

    A 25.0-ml sample of 1.00M KBr and a 75.0-ml are mixed. The solution is then heated to evaporate water until the total volume is 50.0 ml. What is the Molarity of the KBr in the final solution

    asked by Mary on February 9, 2014
  65. chemistry

    What is the percent by volume (% v/v) of a solution made by mixing 12 ml of ethanol (C2H5OH) with 48 ml of water? b) Assuming the density of ethanol is 0.789g/ml, what is the molarity of this solution?

    asked by ben on March 19, 2013
  66. Chemistry

    54.0 mL of a 1.50 M solution is diluted to a total volume of 258 mL. A 129-mL portion of that solution is diluted by adding 165 mL of water. What is the final concentration?

    asked by Sara on February 2, 2013
  67. physics

    What percentage of a floating iceberg’s volume is above water? The specific gravity of ice is 0.917 and the specific gravity of the surrounding seawater is 1.025.

    asked by James on December 13, 2009
  68. chemistry

    How many grams of calcium chloride would you dissolve in water to make a total .111 M calcium chloride solution with 200 mL final volume?

    asked by fiath on July 13, 2010
  69. math

    an open steel tank measures 2m by 2.5m by 3m.It holds 7500 ml of water.What is the volume of steel,in cubic metres,making up the sides of the tank ?

    asked by WAN on November 22, 2012
  70. physics

    A solid aluminum ingot weighs 89 N in air. What is its volume? The ingot is suspended from a rope and totally immersed in water. What is the tension in the rope?

    asked by Anonymous on November 25, 2009
  71. physics

    A solid aluminum ingot weighs 89 N in air. What is its volume? The ingot is suspended from a rope and totally immersed in water. What is the tension in the rope?

    asked by Anonymous on November 25, 2009
  72. 5th grade Science

    A plastic boat has a mass of 3600g and a volume of 1200cm cubed; what is the density? I figured out the answer to this first ? is 3g/cm cubed I need help with Does the boat float in water? Why or Why not?

    asked by Dominic on March 8, 2015
  73. Chem3

    A solution is prepared by dissolving 22.8 mL of methanol (d = 0.782 g/mL) in 100 mL of water (d = 1.00 g/mL) so that the final volume of solution is 118 mL. What is the percent methanol by mass?

    asked by Ryan on May 2, 2011
  74. Chemistry

    75.0 mL of a 1.80 M solution is diluted to a volume of 258 mL. A 129-mL portion of that solution is diluted using 187 mL of water. What is the final concentration?

    asked by Amanda on August 26, 2012
  75. Chemistry

    75.0 mL of a 1.80 M solution is diluted to a volume of 258 mL. A 129-mL portion of that solution is diluted using 187 mL of water. What is the final concentration?

    asked by Amanda on August 26, 2012
  76. chemistry

    Assume that 268mL of 5.00M NaOH are diluted to a final volume of 574mL with water. What is the final molarity of NaOH (FM=40.0).

    asked by Morgan on November 8, 2015
  77. Chemistry

    72.0 ml of a 1.50 M solution is diluted to a volume of 288 mL. A 144 mL portion of that solution is diluted using 185 mL of water. What is the final concentration?

    asked by Anonymous on January 24, 2011
  78. Chemisty

    74.0 mL of a 1.80 M solution is diluted to a volume of 248 mL. A 124-mL portion of that solution is diluted using 135 mL of water. What is the final concentration?

    asked by Paul on January 14, 2013
  79. Chemistry

    72.0 ml of a 1.50 M solution is diluted to a volume of 288 mL. A 144 mL portion of that solution is diluted using 185 mL of water. What is the final concentration?

    asked by Anonymous on January 25, 2011
  80. chemisttry

    how many ml of a 1 M NaOH solution do you need to add to a 250 ml flask and bring it to volume with deionized water to make a 0.12 M NaOH solution

    asked by william on April 23, 2012
  81. Physics

    A rock, which weighs 350 lb in air, weighs 226 lb when submerged in fresh water (62.4 lb/ft3). The volume of the rock is:

    asked by Ken on December 16, 2010
  82. chemistry

    A 60.0-g sample of NaOH is dissolved in water, and the solution is diluted to give a final volume of 1.50 L. The molarity of the final solution is ?

    asked by Anonymous on December 10, 2009
  83. Geometry

    A rectangular aquarium has a length of 18 inches, and a height of 12 inches. What is the maximum volume of water that the aquarium can hold? Use V=lwh

    asked by Tiger on May 8, 2016
  84. Science

    A solution made up of 20ml of mythl alcohol and 50ml of water. What is the volume percent of ethyl alcohol in solution.

    asked by Araceli on July 7, 2014
  85. chemistry

    how to prepare and calculate 10%,20% and 30% of phosphoric acid from the concentrated? Meaning that if 10% = 10%phosporic acid+90% of water. let say i want to prepare in 250ml volume.

    asked by lala on January 29, 2013
  86. AP Physics

    A rock, which weighs 350 lb in air, weighs 226 lb when submerged in fresh water (62.4 lb/ft3). The volume of the rock is:

    asked by Tony on December 16, 2010
  87. Chemistry

    67.0 mL of a 1.50 M solution is diluted to a volume of 258 mL. A 129-mL portion of that solution is diluted using 163 mL of water. What is the final concentration?

    asked by Anonymous on October 2, 2012
  88. Chemistry

    75.0 mL of a 1.40 M solution is diluted to a volume of 248 mL. A 124-mL portion of that solution is diluted using 165 mL of water. What is the final concentration?

    asked by jessica on November 29, 2014
  89. Chemistry

    A water solution containing 25.0% sucrose by mass, has a density of 1.25g/mL. What volume of this solution in liters, must be in an application requiring 2.50 KG of sucrose?

    asked by Kate on September 27, 2010
  90. Chemistry

    A volume of 25.0 mL of 8.0 M acetic acid is diluted with sufficient water to prepare 1.00 liter of solution. What is the concentration of the diluted solution?

    asked by Allie on March 9, 2008
  91. Physics

    A rock, which weighs 350 lb in air, weighs 226 lb when submerged in fresh water (62.4 lb/ft3). The volume of the rock is:

    asked by Sammy on December 16, 2010
  92. Calculus

    1. Chris makes an open-topped box from a 30-cm by 30-cm piece of cardboard by cutting out equal squares from the corners and folding up the flaps to make the sides. What are the dimensions of each square to the nearest hundredth of a centimetre, so that

    asked by Icy on June 17, 2007
  93. Chemistry! urgent

    what volume of gas at 40°C and 1.50 atm is necessary to react with 300 L of hydrogen gas measured at the same conditions? 2H2 (g) + O2 (g) --> 2H20 (g) 1.50 atm= 151.KPa How would I solve this? Because I can't use: PV = nRT I have pressure, temperature,

    asked by Sarah on January 10, 2018
  94. Geometry

    Can someone please check these for me. I have to leave answers in Pi. Find the Volume of a right cone with radius 6 height 10 V=1/3 pi r squared*h =1/3pi (6)^2(10) =1/3(360)pi =120pi Find the volume of a sphere with radius 3cm V=4/3 pi r^3 =4/3 pi3^3

    asked by DANIELLE on July 9, 2007
  95. chemistry

    Couze The water in the buket has some energy (tempreture) it is absorbed by the water and the ice melts this way water cools...now if you consider the ice outside the bucket water will no longer be in tuch with ice ,since energy of water since must be

    asked by Rupali on September 14, 2010
  96. Physics

    A primitive diving bell consists of a cylindrical tank with one end open and one end closed. The tank is lowered into a freshwater lake, open end downward. Water rises into the tank, compressing the trapped air, whose temperature remains constant during

    asked by Jason on November 11, 2014
  97. Calculus

    1. Find the volume formed by rotating the region enclosed by x=5y and x=y^3 with y¡Ý0 about the y-axis. 2. Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis y=18x-6x^2 , y=0 : about the

    asked by jimmy on May 4, 2007
  98. Algebra

    A tank is filling with water from a natural spring. Three days ago the water was four feet deep, and yesterday the water was eight feet deep. Assume that the water depth continues to rise at this same rate after today

    asked by Anonymous on June 20, 2018
  99. calculus

    A 24ft high conical water tank has its vertex on the ground and radius of the base is 10 ft. If water flows into the tank at a rate of 20 ft3/min, how fast is the depth of water increasing when the depth of the water is 20 ft?

    asked by daani on October 19, 2010
  100. Calculus

    A water tank has a shape of an inverted circular cone with base radius 3 m and height of 5 m. If the water is being pumped into the tank at a rate of 2 m^3 /min, find the rate at which the water level is rising when the water is 3 m deep.

    asked by Jay on November 22, 2010