1. Mathematics

    The height in metres of the water in a harbour is given approximately by the formula d=6+3cos30t, where t is the time in hours from. Find a) The height if the water at 9:45pm b) The highest and the lowest water level and occur

    asked by David on September 20, 2017
  2. physical science

    A rectangular container measuring 16cm times 46cm times 67 cm is filled with water what is the mass of this volume of water in kilograms and grams? (take the density of water to be 1000 kg/m cube

    asked by vicky on January 26, 2012
  3. chem 101

    A one pound piece of iron was heated to 1000 °C and then quenched in a bucket containing one gallon of water at 25 °C. What was the temperature of the water after the iron and the water came to thermal equilibrium? correct answer is 37C

    asked by Anonymous on April 11, 2012
  4. Physics

    A 123 g cube of ice at 0◦C is dropped into 1.9 kg of water that was originally at 81◦C. What is the final temperature of the water after after the ice melts? The latent heat of fusion of water is 3.33 × 105 J/kg . Answer in units of ◦C

    asked by Tiffany on January 30, 2013
  5. science

    ms. janick's class wants to measure how quickly water evaporates. they measure the level of some water in a glass for 4 days and record the levels. which graph shows that the water evaporated over time?

    asked by Anonymous on October 17, 2018
  6. Chemistry

    Glycerol is a nonvolatile water soluble material. It's density is 1.25g/ml. Predict the vapor pressure of a solution of 2.40E2 ml of glycerol, in 385ml of water, at the normal boiling pt of water.

    asked by Jonah on April 7, 2013
  7. chemistry

    24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5.

    asked by Ericka on April 19, 2008
  8. chemistry

    24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5.

    asked by Ericka on April 19, 2008
  9. chemistry

    24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5.

    asked by Ericka on April 19, 2008
  10. chemistry

    24 mL of 0.39 mol/L acetic acid is titrated with a standardized 0.33 mol/L KOH solution. Calculate the pH of the solution after 17 mL of the KOH solution has been added. Assume the Ka of acetic acid is 1.8 x 10-5.

    asked by Chaitanya on April 20, 2008
  11. Chem 2

    So i need to calculate the pH of 50ml water (de-ionized) with 1 ml of 1M HCl. So the moles of HCl i think is .001 divided by the total amount of solution (.051). I get 0.0196, then i take the negative log of this number and it comes out to 1.71 roughly.

    asked by Kyle on October 15, 2013
  12. Chemistry

    What mass of silver chromate can be dissolved in 125 mL of water? How do I find this out? Ag2CrO4 is not very soluble. Look up the solubility product and calculate the solubility from Ksp. Wow, thank you so much. I realised that I wrote my chemical formula

    asked by HelpMe on October 30, 2006
  13. physics

    Supertank has engine exerting a 75x10 cube N, Force against water drag at 40x10cubeN, Calculate tensions in tugs cable, Supertank is 1piont5x10eight kg 30 degrees vertical pull, Acceleration 2x10negative3 m/s?

    asked by june on March 2, 2012
  14. CHEMISTRY

    18cm^3 of 1.0M H2SO4 just reacted with 24cm^3 of 1.5M NaOH to form sodium sulfate & water. Calculate the amounts in moles of sulfuric acid & sodium hydroxide reacting & write an equation for the reaction.

    asked by Janey on October 13, 2013
  15. chemistry

    the fictitious compound pandemonium carbonate has a ksg=3.091*10^-9 M 3 in water at poor temperature .calculate the solubility of PnCo3 in an aqueous solution of 1.11 M pandemonium sulfate. express your answer in units of molarity.

    asked by himani. on May 5, 2013
  16. physics

    swimmers often notice that when they start to swim in a still body of water after a hot sunny day the surface water is warm but the deeper water is cold. why this happens?explain. (is it that the heat of the sun can only heat up the surface of the water?)

    asked by Pauline on May 3, 2007
  17. chemistry

    1. When gases are collected using displacement of water, some water vapor mixes in with the gas being collected. A student performed a similar experiment in which 35.2 ml of H2 gas was collected over water at a temperature of 21 degrees Celsius. If the

    asked by preshi on May 2, 2012
  18. Physics

    A flying squid (family Ommastrephidae) is able to "jump" off the surface of the sea by taking water into its body cavity and then ejecting the water vertically downward. A 0.80 kg squid is able to eject 0.32 kg of water with a speed of 20 m/s. (a) What

    asked by xxxxxxx on April 11, 2016
  19. Chemistry - Science

    A 6.70 g sample of a binary mixture of silver (I) nitrate and sodium nitrate is completely dissolved in water to make a solution. Aqueous barium chloride is then added to this solution in excess to form 3.60 g of silver chloride solid. What is the percent

    asked by Anonymous on March 25, 2014
  20. Chemistry

    A salt may be prepared by the reaction of one salt with another salt, particularly if one of the products is insoluble. In which one of the following reactions is this demonstrated? (NH4)2CO3 + K2SO4 \(->NH4)2SO4 + K2CO3 CuCl2 + 2 NH4NO3 \->Cu(NO3)2 + 2

    asked by Anna on November 8, 2014
  21. Chemistry

    When ammonia was reacted to copper(ll)oxide at a high temperature, it will produce nitrogen gas, copper metal and water vapour. an experiment was done with 18.0g of ammonia was reacted with 90.0g of copper(ll)oxide. (a)Write balance chemical equations for

    asked by Reezyy on December 1, 2016
  22. physics

    at a picnic a frind asks you for advice about cooling his warm bottle of soft drink.he can submerge the bottle in a bucket of water, or wrap the bottle in a cloth and then wet it with the water from the bucket.which should he do? i think the first option

    asked by Emma on May 14, 2007
  23. Chemistry Homework Help Please!

    1.) Quantify the pH for a solution prepared by dissolving 0.050 moles of Acetic Acid (CH3COOH) and 0.20 moles of Sodium Acetate (CH3COONa) in water and adjusting the volume to 500 mL. The pka for Acetic Acid (CH3COOH) is 4.75. 2.) Should 0.010 moles of

    asked by Always on November 24, 2014
  24. CHEMISTY HOMEWORK HELP ASAP

    1.) Quantify the pH for a solution prepared by dissolving 0.050 moles of Acetic Acid (CH3COOH) and 0.20 moles of Sodium Acetate (CH3COONa) in water and adjusting the volume to 500 mL. The pka for Acetic Acid (CH3COOH) is 4.75. 2.) Should 0.010 moles of

    asked by Always on November 24, 2014
  25. math

    A tank was 3/5 filled with water. After removing 120 litres of water from the tank it was 1/5 filled. a)Find the amount of water the tank can hold when completely filed. b)If one litre of water has a mass of 1 kg, find the mass of water in the tank when

    asked by sherika on February 13, 2013
  26. ELECTROLYSIS OF ZnI2

    ELECTROLYSIS OF ZnI2 if you have done this experiment Please help me answer these questions as i missed the last half of my chem lab today. 1. What color change occurred when the wire is first heated. -next question is... What is the identity of the

    asked by sean on April 18, 2013
  27. General Chemistry

    When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced. CaCO3(s)+2HCl(aq)--> CaCl2(aq)+H2O (l)+CO2(g) How many grams of calcium chloride will be produced when 32.0 g of calcium carbonate are combined

    asked by Alexis on February 6, 2013
  28. Biology

    In class, I did an experiment with water and iodine solution in a beaker and also starch in a dialysis tube tied and placed in the beaker. There were discussion questions I couldn't answer surely... please check my answers. 1. a)Use your results to

    asked by CrissyXD on April 3, 2012
  29. Physics

    A person takes in a breath of 13*C of air and holds it until it warms to 36.5*C. The air has an initial volume of 0.24 L and a mass of 0.00077kg. a. Determine the work done by the air on the lungs if the pressure remains constant at 1 atm. Answer in units

    asked by Laura on January 3, 2011
  30. Math PLZ HELP!!!!

    A tank that holds 4000 gallons of water will drain completely into a reservoir in 32 minutes. The volume of remaining water in tank after time t is given by the function: V(t)=4000(1-t/32)^2, 0

    asked by Jessy on December 18, 2013
  31. Chemistry

    Can you explain the process for solving this problem (this one is more complicated than the example in our book): A solution contains both I^- and Cl^-, each at a concentration of 3.0x10^-2M. What concentration of Pb^+2 is required to precipitate the

    asked by Lacey on February 19, 2007
  32. geometry

    A rectangular container is 5 cm. wide and 12 cm. long and contains water to a depth of 7 cm. A stone is placed in the water and the water rises 1.7 cm. Find the volume of the stone.

    asked by Anonymous on August 7, 2012
  33. physics

    A .5kg cup of water is swung around in a vertical circle just fast enough so the water can't fall out. What's the least amount of acceleration this water and cup would have on them?

    asked by Anonymous on December 18, 2012
  34. physics

    A 10 cm by 10 cm by 10 cm wood block with a density of 700 kg/m^3 floats in water. a. What is the distance from the top of the block to the water if the water is fresh? b. If it's seawater?

    asked by luma on January 26, 2016
  35. Chemistry

    A student mixes 95.1g of water at 77.5 degree C with 42.7g of water at 141.1 degree C in an insulated flask. What is the final temperature of the combined water?

    asked by Linetta De La Cruz on November 1, 2010
  36. chemistry

    A cylindrical glass of water (H2O) has a radius of 6.12 cm and a height of 9.91 cm. The density of water is 1.00 g/cm3. How many moles of water are contained in the glass?

    asked by Anonymous on November 28, 2013
  37. math

    a picher cotained 2 liters of water justin drank 355 milliliters of the water how many milliliters of water were left in the pitcher

    asked by courtanay on January 5, 2011
  38. math

    a water pump has a capacity to fill water at 10 liters per second. How much time will it take to fill the water tank of 80cm .60cm.50cm?

    asked by ajAy on June 5, 2016
  39. physics

    A cylindrical glass of water (H2O) has a radius of 6.12 cm and a height of 9.91 cm. The density of water is 1.00 g/cm3. How many moles of water are contained in the glass?

    asked by Anonymous on November 28, 2013
  40. Physics please help

    A cylindrical glass of water (H2O) has a radius of 3.49 cm and a height of 9.85 cm. The density of water is 1.00 g/cm3. How many moles of water are contained in the glass?

    asked by Bobby on October 27, 2014
  41. chem

    The pH of saturated Sr(OH)2 is found to be 13.12. A 15.0ml sample of saturated Sr(OH)2 is diluted to 250.0ml in a volumetric flask. A 15.0ml sample of the diluted Sr(OH)2 is transferred to a beaker, and some water is added. The resulting solution requires

    asked by tomi on April 2, 2009
  42. Chemistry

    A 5.00 gram sample of aluminum pellets (specific heat capacity = 0.89 J/g*C) and a 10.00 gram sample of iron pellets (specific heat capacity = 0.45 J/g*C) are heated to 100.0 *C. The mixture of hot iron and aluminum is then dropped into 97.3 gram of water

    asked by Anonymous on October 13, 2010
  43. Physics

    A pipe carrying water is laid out over level ground. One segment of the pipe has a diameter of 2.22 cm and the next segment has a diameter of 1.82 cm. In the wider segment, the water pressure is 83,700 Pa and the water is moving at 2.77m/sec. 1-what is the

    asked by Anonymous on December 8, 2017
  44. 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 1.5L of water upon warming from 25C to 50C . Assume that the water is initially saturated with nitrogen and oxygen gas at

    asked by Anonymous on May 9, 2015
  45. chem

    Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.2L of water upon warming from 25C to 50C . Assume that the water is initially saturated with nitrogen and oxygen gas at

    asked by rc on January 26, 2010
  46. math

    A shop keper buy 40kg of fruits for #120. he sells 20kg at #5 per Kg, 10kg at #2 per kg and the remaining 5kg at 50kobo. calculate amount he realise from d sales .calculate total profit. calculate percentage on his outlay of #120

    asked by opeoluwa on November 22, 2018
  47. math,help,bobpursly

    What are some challenges for rational expressions? Also on my previous question about why are polynomials important bobpursly can you expalin it to me towards what you ment about your responce because i still do not undertand...thanks when you get a

    asked by jas20 on March 5, 2007
  48. Physics

    a tourist drops 1-liter water filled baloon from the top of the Washington monument (170 m high).If air resistance is negligible and almost all the motion energy heats the water,find the increase in temperature of water when it hits the pavement?

    asked by Fildzah Istiqomah on November 12, 2011
  49. Physics

    a tourist drops 1-liter water filled balloon from the top of the Washington monument (170 m high).If air resistance is negligible and almost all the motion energy heats the water,find the increase in temperature of water when it hits the pavement?

    asked by Izthy Fildzah on November 12, 2011
  50. Thermodynamics

    12 kg of water in an insulated container is at 30 C. Initially, only 18 percent of the water is in the liquid phase. An electric heater, connected to a 120-V source and 9 A, is used to heat the system. Determine the time required to vaporize the entire

    asked by Anonymous on November 5, 2014
  51. math

    Initially a pool contains 350 gallons of water. A hose is placed in the pool, and the water is turned on. The hose adds 4.8 gallons of water per minute. Write an equation that shows the relationship between the total amount of water in the pool, V, and the

    asked by jeng on November 15, 2009
  52. chem 102

    Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.1L of water upon warming from 25 ∘C to 50 ∘C. Assume that the water is initially saturated with nitrogen and oxygen

    asked by ieshia on February 19, 2014
  53. Chemistry

    How much boiling water would you need in order to raise the bath to body temperature (about 37)? Assume that no heat is transferred to the surrounding environment. Imagine that your water heater has broken, but you want to take a bath. You fill your

    asked by Bella on November 4, 2010
  54. chemistry

    In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

    asked by Janice on February 19, 2012
  55. Chem

    In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 41.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

    asked by Andrew on February 22, 2012
  56. chemistry

    In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

    asked by Sarah on February 19, 2012
  57. Chemistry

    In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

    asked by Ariel on February 19, 2012
  58. Chemistry

    In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 59.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse

    asked by Melody on February 18, 2012
  59. ocean county college

    A 150 g sample of metal at 55.0 C raises the temperature of 150 g of water from 23.0 C to 35.0 C. Determine the specific heat of the metal in J/g C. Hint: #1 First find heat absorbed by water using formula q = mass x specific heat x change in temp (of

    asked by adina on March 22, 2010
  60. Physics

    Water flows at 0.25L/s through a 9.0-m-long garden hose 2.0cm in diameter that is lying flat on the ground.The temperature of the water is 20degC. What is the gauge pressure of the water where it enters the hose? in Pa

    asked by Cassie on December 5, 2012
  61. Physics

    What is the total amount of potential energy that can be stored in a 10,000 gallon water tower built with the water tank 61.50 m above ground level?

    asked by Matt on February 15, 2017
  62. Chemistry

    5.00 liter steel cylinder is filled with water vapor at 100 °C and 650 mm Hg. Determine the mass of water that condenses to a liquid when the closed system is cooled to 20 °C. The vapor pressure of water at 20 °C is 18 mm Hg. 6.

    asked by Anonymous on July 12, 2011
  63. chemistry

    The heat of vaporization of water is 40 kJ mol-1 at 100oC. What percentage of the heat supplied to vaporize the water can be converted into work if the water is vaporized at 100 degrees C against a constant pressure of 1 atm?

    asked by nath on November 9, 2011
  64. Chemistry

    A chunk of copper weighing 18.9 grams and originally at 97.63oC is dropped into an insulated cup containing 77.9 grams of water at 22.44oC. Assuming that all of the heat is transferred to the water, the final temperature of the water is what in C.

    asked by Jackson on February 19, 2010
  65. Chemistry

    I am designing a lab right now, and I want to know: if I fill a beaker with cold water from the tap and submerge a sample of solid metal, after a couple of minutes, the metal should be the same temp as the water, right? Would it be quicker to use hot water

    asked by Stuck on February 20, 2010
  66. Science

    Determine the final temperature when 100 g of water absorbs 1000 J of thermal energy, given that the initial temperature of the water is 20.0°C. The theoretical specific heat capacity of water is 4.19 J/g·°C. Show your work below.

    asked by Desirae on May 23, 2015
  67. chemistry

    The fermentation of sugar (C6H12O6) to form ethanol (C2H5OH) and carbon dioxide (CO2) occurs according to the following equation: C6H12O6(aq) ¡ú 2 C2H5OH(aq) + 2 CO2(g) kJ mol¨C1 ¦¤Hf (C6H12O6(s)) is ¨C1275 ¦¤Hf (C2H5OH(l)) is ¨C277 ¦¤Hbond

    asked by mailyn on November 3, 2010
  68. physical geoprahy

    Assume that a parcel of air is forced to rise up and over a 6000-foot high mountain (shown below). The Initial temperature of the parcel at sea level is 76.5 F, and the lifting condensation level (LCL) of the parcel is 3000 feet. The DAR is 5.5 F/1000' and

    asked by lost on May 28, 2013
  69. Science

    Assume that a parcel of air is forced to rise up and over a 6000-foot high mountain (shown below). The Initial temperature of the parcel at sea level is 76.5 F, and the lifting condensation level (LCL) of the parcel is 3000 feet. The DAR is 5.5 F/1000' and

    asked by Itzel on October 12, 2014
  70. Physical Geography

    Assume that a parcel of air is forced to rise up and over a 6000-foot high mountain (shown below). The Initial temperature of the parcel at sea level is 76.5 F, and the lifting condensation level (LCL) of the parcel is 3000 feet. The DAR is 5.5 F/1000' and

    asked by jorge on January 20, 2014
  71. Chemistry

    Objectives To determine the molecular weight of a volatile liquid. Discussion [This laboratory exercise was adapted from one in Beran and Brady's Laboratory Manual for General Chemistry , John Wiley & Sons, 1982] The Dumas Method for determining the

    asked by Veronica on November 28, 2012
  72. Physics

    A fire hose can project water at a rate of 6.00x10^2 litres per minute to a height of 40.0m. Find: a) the velocity with which the water leaves the tube b) the kinetic energy of the water as it leaves the hose c) the kinetic energy of the water at 40.0m.

    asked by Jane on August 26, 2012
  73. Microbiology

    2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2-fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each

    asked by Anonymous on November 25, 2014
  74. Science

    2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2-fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each

    asked by Anonymous on November 25, 2014
  75. Chemistry

    2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2-fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each

    asked by Anonymous on November 25, 2014
  76. geometry

    Denise poured milk into a glass shaped like a right circular cylinder with a radius of 2 inches. When she added chocolate syrup to the milk, the height of the liquid in the glass increased by 1/2 inch. What was the volume of the chocolate syrup that Denise

    asked by Slacker on April 22, 2012
  77. APChem

    Hi I tried to understand this but I don't know why the answer is B: Which one of the following pairs cannot be mixed together to form a buffer solution: A) NaC2H3O2, HCl B)RbOH, HBr C) NH3, NH4Cl D) H3PO4, KH2PO4 E) KOH, HF The answer is B but could you

    asked by Kiki on March 22, 2010
  78. chemistry hw

    SOMEONE PLEASE HELP AND CONFIRM THE RIGHT ANSWER FOR ME...I HAVE ONE MORE ATTEMPT TO THIS PROBLEM AND I NEED HELP!!!!! PLEASE!!!!!!!!!!!!!!!!!!!! THANKS! In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution

    asked by Ariel on February 19, 2012
  79. Physics

    One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x

    asked by Andrea on October 6, 2010
  80. Physics

    One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x

    asked by Angel on October 7, 2010
  81. Physics

    One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x

    asked by Angel on October 7, 2010
  82. Physics

    One gram of water is placed in a cylinder and the pressure is maintained at 2.0 x 105 Pa. The temperature of the water is raised by 31oC. Determine the change in internal energy when, a) the water is in its liquid phase and causes an expansion of 1.0 x

    asked by Angel on October 7, 2010
  83. chemistry

    Suppose that after measuring the pH of 1.05 M HCl solution, three drops (0.20 mL) of the solution remain behind on the pH electrode. a) When this electrode is then dipped into 100 mL of pure distilled water, show by calculation that the pH of the water is

    asked by Nicollette on September 29, 2015
  84. chemistry

    ok im not sure how to do this 15.00ml of acetic acid is pipetted into a flask 0.35 grams of sodium acetate trihydrate is added and mixed then 0.75 of the hydrate is added 1)i assumed that the volume(s) are additions. 15.00ml x .35g *m/1.45g and for the

    asked by Jim_R on July 16, 2009
  85. calc

    I would greatly appreciate your help with a math equation needed for a science experiment I'm researching. The case is the following: there is a pit full of juice and a stream of water is flowing through the pit (so that the amount of water which enters

    asked by Joseph on February 22, 2011
  86. Chemistry

    What formula do I use to figure. 16.5 g of KCL (MM=74.55 g/mol) is dissolved in enough water to make 575 mL of solution. Calculate the molarity of the KCl solution.

    asked by Norma on July 25, 2010
  87. 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
  88. Chemistry

    Calculate the final temperature (once the ice has melted) of a mixture made up initially of 75.0 mL liquid water at 29.0 Celsius and 7.0 g ice at 0.0 Celsius?

    asked by Briza Brooks on February 24, 2015
  89. Chemistry

    Calculate the final temperature of a mixture of 200.0g of ice initially at -16.5 Celsius and 406.0g of water initially at 84.5 degrees Celsius.

    asked by Brittany on November 9, 2012
  90. physics

    The horizontal door of a substance at a depth of 500m has an area of 0.4m^2 . Calculate the force exerted by the sea water on the door at this depth.

    asked by somay on June 14, 2016
  91. chemistry

    how do you calculate the empirical formula of the barium hydroxide hydrate if a sample consists of 3.70 grams of barium hydroxide and 2.64 gras of water???

    asked by Marissa Turner on February 3, 2012
  92. 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 7, 2016
  93. Chemistry

    Calculate the final temperature (once the ice has melted) of a mixture made up initially of 75.0 ml liquid water at 29.0 degrees C and 7.0 g ice at 0.0 degrees C.

    asked by Jaclyn on February 26, 2010
  94. physics

    A bucket of water with a mass of 20.0 kg is being pulled up from a well with a single massless rope. If the tension in the rope is 200 N, calculate the acceleration of the bucket.

    asked by lol on August 11, 2015
  95. Chemistry

    Calculate the heat of solution of LiOH if addition of 25.0g of LiOH causes the temperature of 120.0ml of water to rise from 20.0 celcius to 29.0 celcius.

    asked by Aditi on January 25, 2013
  96. chemistry

    The Ksp for silver sulfate (Ag2SO4) is 1.2 10-5. Calculate the solubility of silver sulfate in each of the following. A)water B)0.14 M AgNO3 C)0.33 M K2SO4 the answer in mol/L

    asked by melissa on December 2, 2011
  97. Physics

    The freezing point depression of a .100 m solution of NaCl solution is .34C. Calculate the percent dissociation of NaCl.( Kf for water=1.86) Please help

    asked by Sammy on August 28, 2009
  98. acid vs base

    Calculate the pH of a solution that obtained by diluting 0.015 mol acetic acid with water to 250 cm3 (the Ka - value for acetic acid is 1.74 x 10-5 M).

    asked by Anonymous on February 18, 2011
  99. chemistry

    the vapor pressure of water at 45.0 °c is 71.93 mmhg. Calculate the vapor pressure of a solution of 1.50 m Al(NO3)3 at this temperature (assume 100% dissociation)

    asked by michael on July 16, 2013
  100. Chemistry

    In each of the following, determine how much solute (in g or mL) must be added to the correct quantity of water to make the given amount of solution at the correct concentration. a)KI to make 50.0mL of a 0.50 M solutioon b)12.0 M HCL to make 500 mL of a

    asked by Kim on May 2, 2010