1. Science

    I conducted an experiment of the heat of combustion for three alcohol fuels, methyl, propyl and ethyl. The results were: Methyl - mass before was 231.81g temp of water before heating was 15 deg c. temp of water after heating was 40 deg c. mass of methyl

    asked by Paul on November 8, 2010
  2. Science

    The solubility of potassium nitrate is 40 at 30 degree celcius. Calculate the mass of water required to make a saturated solution by dissolving 15 gram of potassium nitrate at that temperature. Could u guys help me to get answer of this question. Plz help

    asked by Dõniyā on March 29, 2016
  3. Chemistry

    Calculate the total heat (in Joules) needed to convert 1.602 x 101 grams of ice at -1.383oC to liquid water at 8.554 x 101oC. Melting point at 1 atm 0.0oC Cwater(s) = 2.09 J/goC Cwater(l) = 4.18 J/goC delta Hofus = 6.02 kJ/mol

    asked by Devin on January 12, 2015
  4. chemistry (moles)

    2.5g of a mixture of anhydrous BaOH and BaCl2 was dissolved in distilled water and made up to 250cm3. 20cm3 of this solution required 19cm3 of 0.1moldm3 of dilute nitric acid for complete reaction. Calculate the percentage by mass of BaCl2 present in the

    asked by joseph on January 22, 2016
  5. Chemistry - Please help!!

    I did a lab for Organic Chemistry We did a simple distillation of an unknown alcohol to determine the boiling point, which was found to be 74*C The four possibilities for the unknown were methanol, ethanol, 1-propanol and 2-propanol. So from the boiling

    asked by Laura on October 6, 2010
  6. Chemistry

    I did a lab for Organic Chemistry We did a simple distillation of an unknown alcohol to determine the boiling point, which was found to be 74*C The four possibilities for the unknown were methanol, ethanol, 1-propanol and 2-propanol. So from the boiling

    asked by Laura on October 6, 2010
  7. physics

    A ball is thrown horizontally of a cliff. If the initial speed of the ball is 24.0 m/s and the cliff is 124.0 m high, how far from the base of the cliff will the ball land in the water below? Calculate the answer in meters (m) and rounded to three

    asked by Dalia on January 31, 2017
  8. classical mechanics

    enturi Flow Meter (19 points possible) A Venturi flow meter is used to measure the the flow velocity of a water main. The water main has a diameter of 40.0 cm, and the constriction has a diameter of 10.0 cm. The two vertical pipes are open at the top, and

    asked by socorro on December 10, 2013
  9. math

    A group of people planned to contribute equally towards a water project which needed Ksh 200,000 to complete, however, 40 members of the group without from the project. As a result, each of the remaining members was to contribute Kshs 2,500. (a) Find the

    asked by kudu on February 21, 2015
  10. Chemistry

    Heat from burning a fuel is absorbed by a copper calorimeter. The calorimeter has a mass of 81.34 g and contains 200.0 g of water initially at 21 degrees Celsius. a) How much heat was absorbed by the calorimeter and the water if the final temperature of

    asked by lomonoyan on October 20, 2016
  11. AP Calculus.HELP!

    Water runs into a conical tank with radius 5 and altitude 10 at a constant rate of 2 cu.ft. per min. How fast is the water rising in the tank at any instant? You want dh/dt, given dV/dt. so write an equation relating V to h. V= 1/3 Areatop*h, in this case

    asked by Sarah on October 27, 2006
  12. NU

    The end of a thin glass-wall tube with an inside diameter of 1-mm is inserted into a reservoir of pure water with a temperature of 25 degree C. What is the surface tension (adhesoin) force on the water inside the tube? To what height will the water rise in

    asked by LaToya on March 17, 2011
  13. physics

    the velocity of the water jet discharging from the orifice can be obtained from v = (2gh)^(1/2), where h = 2m is the depth of the orifice from the free water surface. determine the time for a particle of water leaving the orifice to reach point B and the

    asked by - on April 3, 2011
  14. chemistry

    can some one help me with a few chem questions please. A chunk of iron weighs 4.32 g. a) How many iron atoms are there in this sample? 55.85 g Fe = 1.00 mol Fe = 6.022 x 1023 atoms Fe b) How many moles of iron are there in this sample? 2. . You have a

    asked by anna on November 13, 2015
  15. Physics

    Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. (a) Calculate the

    asked by Caleb on December 4, 2012
  16. physics

    Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. (a) Calculate the

    asked by Danny on December 6, 2012
  17. English

    If there is much running water from the faucet, the water becomes lukewarm. So you should turn down the faucet a little so that it has little running water, and then the water will become more warm or hot. Then the baby in the bath tub will not feel cold.

    asked by rfvv on November 21, 2012
  18. Physics

    A sound wave travels in air toward the surface of a freshwater lake and enters into the water. The frequency of the sound does not change when the sound enters the water. The wavelength of the sound is 3.52 m in the air, and the temperature of both the air

    asked by Abdul on April 9, 2018
  19. Chemistry

    A Chemist wanted to determine the percentage of calcium carbonate in a sea shell. He collected a number of sea shells which he crushed into a fine powder. To 2.65 grams of sea shell powder he added 25.0mL of 5.0M Hydrochloric acid. When all the fizzing

    asked by James on June 13, 2016
  20. Chemistry

    Sea water conducts electricity. Which statements give the best explanation for this a) Ions are able to move around in sea water b) Electrons can pass from ion to ion in the sea water c) The sea water contains more ions with positve charges than ions with

    asked by peter on November 6, 2010
  21. Physics

    Given: cp,ice = 2090 J/kg◦C cp,water = 4186 J/kg ·◦C cp,steam = 2010 J/kg ◦C Lf = 3.33 × 105 J/kg Lv = 2.26 × 106 J/kg How much energy is required to change a 37 g ice cube from ice at −10◦C to steam at 116◦C? Answer in units of J. ok.. so

    asked by Claudia on February 1, 2009
  22. Physics

    A trunk of mass m = 1.100 kg is pushed a distance d = 32.0 cm up an incline with an angle of inclination theta = 26.0 ° by a constant horizontal force P = 150. N. The coefficient of kinetic friction between the trunk and the incline is 0.330. a) Calculate

    asked by Steeve on October 19, 2012
  23. Chemistry

    Iron metal is dissolved in dilute aqueous HCl. The resulting solution is warmed with dilute nitric acid and then treated with aqueous potassium iodide. Write equations for the reactions. Ok so for the first step I got: Fe + 2HCl --> FeCl2 + H2 I'm guessing

    asked by Alice on March 2, 2010
  24. math

    Water is poured into a right circular cone with a height of 10 cm and diameter of 8 cm until it is three-fourths full. All this water is then poured into an empty cylindrical container with a radius of 5 cm and height of 9 cm. What is the height of the

    asked by Anonymous on August 20, 2015
  25. calculus

    Water is being filled into a water tank at 22 liters/second. The base of the tank has dimensions w = 1 meter and L = 2 meter . What is the rate of change of the height of water in the tank? (express your answer in cm/sec).

    asked by kchik on November 9, 2012
  26. maths help!!!!!!!!

    An empty 5-gal water jug weights 0.75lb. with 3 c of water inside, the jug weighs 2.25 lbs. Predict the weight of the jug with 5 c of water inside. Plz explain how to do this.....

    asked by anjali on October 7, 2008
  27. Math

    The depth d in feet of the water in a bay at is given by d(t) = 3/2 sin (5πt/31) + 23 where t is time. Graph the depth of the water as a function of time. What is the maximum depth of the water to the nearest tenth of a foot?

    asked by Anonymous on October 2, 2014
  28. calculus

    Water is being filled into a water tank at 22 liters/second. The base of the tank has dimensions w = 1 meter and L = 2 meter . What is the rate of change of the height of water in the tank? (express your answer in cm/sec).

    asked by kchik on November 9, 2012
  29. Physics(Please help)

    A paperweight, when weighed in air, has a weight of W = 6.95 N. When completely immersed in water, however, it has a weight of Win water = 4.26 N. Find the volume of the paperweight. Would I multiply the two values of weight and then by the density of

    asked by Hannah on June 20, 2012
  30. Science (Chemistry)

    "Calculate the amount of heat (kcal) released when 18.0 g (grams) of steam are condensed at 100.0 C and the resulting water is frozen and cooled to 25.0 C." The only problem that I'm having is the amount of physical and temperature changes that there are.

    asked by Sebastian on October 10, 2016
  31. Science (Chemistry)

    "Calculate the amount of heat (kcal) released when 18.0 g (grams) of steam are condensed at 100.0 C and the resulting water is frozen and cooled to 25.0 C." The only problem that I'm having is the amount of physical and temperature changes that there are.

    asked by Sebastian on October 10, 2016
  32. Chemistry

    Calculate the molarity of the solutions made by dissolving the following amounts of solute in water and making the volume up to the stated value. 5.0mol nitric acid in 2.0L Do I just find the molarity for nitric acid only, because when I write out the

    asked by Jiskhaa on August 28, 2012
  33. Maths

    The internal diameter of a spherical bowl half full is 20cm. The contents is poured into an empty cylindrical bottle with internal diameter 10cm. Calculate correct to one decimal places the depth of water in the bottle

    asked by Andrea on November 7, 2017
  34. Environmental Science

    Can someone please help me match up my vocad since I've gotten them all wrong in class the other day? 1.__Mississippi River 2.__Area above an aquifer 3.__Bottled water 4.__Bacteria 5.__multiple sources 6.__fertilizer runoff 7.__law designed to improve

    asked by Mack on April 21, 2007
  35. Mathematics

    15 liters of water is poured from container A to Container B and 10 liters of water is poured from container A to container C. If C had 20 liters of water less than A, how many more liters of water does C have than A? A. 10L C. 20L B. 15L D. 25L What

    asked by Mary Rose on January 27, 2017
  36. Energy

    174520 = (massboiled) (2260) .1716 = massboiled so .1716? Suppose a burner transfers 325 kJ of energy to 450 kg of liquid water at 20 C degrees. What mass of the water would be boiled away? The first energy going in heats the water: energy=mass*c*(100-20)

    asked by Min on December 17, 2006
  37. Chemistry

    Hello, I just finished an experiment in class dealing with the separation of a sand and salt mixture through the means of filtration (with filter paper and water) and evaporation (using a hotplate). As I was calculating the percent recovery, I yielded

    asked by Anna on September 12, 2018
  38. physics

    There is a small amount of water at the bottom of a sealed containerof volume 4.3 liters which is otherwise full of an ideal gas. A thin tube open to the atmosphere extends down into the water, and up to a height of 238 cm. The system is initially a

    asked by Noodle on April 7, 2010
  39. Physics

    There is a small amount of water at the bottom of a sealed containerof volume 4.3 liters which is otherwise full of an ideal gas. A thin tube open to the atmosphere extends down into the water, and up to a height of 238 cm. The system is initially a

    asked by Noodle on April 6, 2010
  40. Physics

    At a nuclear power plant, water at 6degress Celius from a nearby lake is used in a heat exchange to condense spent steam at a temperature of 115 degees C to water at 80 degrees C. If the cooling water returns to the lake at a temperature of 18 degrees C,

    asked by alex on April 20, 2017
  41. periodic functions(math)

    A vessel is crossing a channel. The depth of the water(measured in metres) varies with time and is represented by the following equation: d(t)=2.5sin(0.523t)+2.9 a. create a graph showing the depth of the water over 24 hours. b. what is the period of this

    asked by Kelly on March 12, 2015
  42. Algebra

    Here is the problem: A two-digit number is eight times the sum of its digits.When the number is added to the number obtained by reversing the digits,the sum is 99. Find the original number. Please explain hot to solve it and it would help a lot to if you

    asked by Please help on June 1, 2010
  43. Algebra

    Here is the problem: A two-digit number is eight times the sum of its digits.When the number is added to the number obtained by reversing the digits,the sum is 99. Find the original number. Please explain hot to solve it and it would help a lot to if you

    asked by Anonymous on May 31, 2010
  44. Ap Biology

    We performed a lab that studied osmosis in potato cells. We put cylinders of potato into varying molar Sucrose solutions and after recording different types of data were able to find the osmotic and water potential of the sucrose solution and potato cells.

    asked by Jessie on November 25, 2007
  45. science

    1. The surface tension in a cup of water is caused by _____. (1 point)attractive forces between the water and its container attractive forces between water molecules adhesive forces between water molecules adhesive forces between the water and its

    asked by NIKE on April 10, 2012
  46. Chemistry

    So this is a three part question. I solved the first part correctly but I need help with the second and third. Q: The dissociation equilibrium constants for the protonated form of of alanine (a diprotic amino acid, H2X+)are Ka1 = 4.6 x 10^-3 and Ka2 = 2.0

    asked by Maria on May 9, 2017
  47. Chemistry Lab

    Which of the following would NOT be a factor for a solute to dissolve in water? A. A solute separates into ions which are supported by hydration. B. Electrostatic attraction between the partially charged atoms in water molecules and the solute. C. A solute

    asked by Natasha on January 12, 2011
  48. Chemistry Lab

    Which of the following would NOT be a factor for a solute to dissolve in water? A. A solute separates into ions which are supported by hydration. B. Electrostatic attraction between the partially charged atoms in water molecules and the solute. C. A solute

    asked by Natasha on January 12, 2011
  49. physics

    Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. a.) Calculate the

    asked by Jordan on December 1, 2011
  50. Physics

    Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. a.) Calculate the

    asked by Matt on December 1, 2011
  51. physics

    Rotating blade (body force in axial loading) blade is fixed to a rigid rotor of radius R spinning at ω rad/sec around the vertical z-axis. Neglect the effects of gravity. Calculate the peak stress in the blade: σmaxn Calculate the blade elongation: δ

    asked by rka on May 3, 2013
  52. physics

    Rotating blade (body force in axial loading) A blade is fixed to a rigid rotor of radius R spinning at omega(w) rad/sec around the vertical z axis, neglect the effect of gravity, calculate the peak stress in the blade calculate the blade elongation.

    asked by mehwish on May 1, 2013
  53. Physics

    A cannon ball is fired at 50 m/s at a 37 degree angle above the horizontal. Calculate the time the cannon ball in the air, calculate how high it rises and calculate how far from the cannon the ball lands? Answers: 6.14 s, 46.2 m, 245.2 m

    asked by Victoria on November 14, 2012
  54. Chemistry

    When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced. CaCO3 + 2HCl -> CaCl2 + H2O + CO2 How many grams of calcium chloride will be produced when 27.0 g of calcium carbonate are combined with 14.0 g

    asked by Anonymous on October 3, 2012
  55. physics

    A fire hose ejects a stream of water at an angle of 37.9 ° above the horizontal. The water leaves the nozzle with a speed of 25.5 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the

    asked by frost on February 10, 2011
  56. Chemistry help please!

    Why does a clear, saturated solution of PbI2 form a yellow precipitate when a small amount of KI is added to the solution? A. KI is insoluble in PbI2. B. PbI2 is always insoluble in water. C. Adding KI is like adding I-, which drives the reaction toward

    asked by Laura on September 19, 2016
  57. programming

    Peter decided to save money to buy a house. Enter this amount as well as the amount he will be able to save each month. He earns 0.8% interest per month while the amount is less than R70,000 and 0,7% interest per month if the amount is equal to or more

    asked by joyce on March 29, 2015
  58. physics- energy and work

    A 47.6-kg diver steps off a 10.82 m high diving board and drops straight down into the water. If the diver comes to rest 5.3 m below the surface of the water, determine the average resistance force exerted on the diver by the water. What is the total

    asked by Hi on November 12, 2014
  59. Chemistry

    If the solubility of arsenic trioxide in water at 25 C is 20g/1L water, would 250mL of water at 25 C containing 3.5g of arsenic trioxide be saturated, unsaturated, or supersaturated?

    asked by Sarab on April 27, 2011
  60. math!!!!!!! help 3

    a water cooler contains 5 gallons of water.if drink 3/5 gallon for each of the next 6 days how many gallons will be left in water cooler at the end of the sixth?

    asked by niki on October 28, 2010
  61. College Algebra 2

    The number of kilograms of water in the human body varies dirctly as the mass of the body. An 84-kg person contains 64-kg of water. How many kg of water is in a 63-kg person?

    asked by Francine on September 26, 2011
  62. Algebra 1

    Thank you in advance for your kind help! How much fresh water should be mixed to a 30% salt water solution, to obtain 90 gallons of a 23% salt water solution?

    asked by Matt on May 4, 2016
  63. Marine Science

    What happens to the majority of water at the poles and at the equator? My answer was that at the poles the water gets cold and at the equator the water gets hot but my teacher said this was wrong. Please help!

    asked by Kim on March 18, 2009
  64. physics

    A sonar signal of frequency 1.00 106 Hz has a wavelength of 1.40 mm in water. (a) What is the speed of the signal in water? (b) What is its period in water? (c) What is its period in air?

    asked by Anonymous, on February 4, 2013
  65. physics

    A sonar signal of frequency 1.00 106 Hz has a wavelength of 1.40 mm in water. (a) What is the speed of the signal in water? (b) What is its period in water? (c) What is its period in air?

    asked by noah on February 1, 2013
  66. English

    1. I will drink enough water. 2. I will dring water enough. 3. I will eat enough water. ---------------------------------- Are #1 and #2 correct grammatically? What about #3? Can we use 'eat' instead of 'drink'? In a basic grammar test, can we use both #2

    asked by rfvv on July 5, 2017
  67. desity

    A fish tank holds 35 {\rm gal} of water. Using the density of 1.0 {\rm g/mL} for water, determine the number of pounds of water in the fish tank

    asked by Anonymous on January 28, 2011
  68. Algebra 1

    Thank you in advance for your kind help! How much fresh water should be mixed to a 30% salt water solution, to obtain 90 gallons of a 23% salt water solution?

    asked by Matt on May 4, 2016
  69. 6th grade math

    the water level of a river is 50 feet. After one day,the water level has decreased to 38,5 feet. After two days, the water level is 37 feet,and after three days,the water level is 35.5 feet. write an equation to represent the water level,L after d days.

    asked by dashana on September 29, 2010
  70. 6th grade math

    the water level of a river is 50 feet. After one day,the water level has decreased to 38,5 feet. After two days, the water level is 37 feet,and after three days,the water level is 35.5 feet. write an equation to represent the water level,L after d days.

    asked by dashana on September 30, 2010
  71. physics

    A solid right circular cone of uniform mass density is initially at rest above a body of water so that its vertex is just touching the waters surface with its axis of symmetry along the vertical. Now, the cone falls into the water, and has zero speed at

    asked by unowen on June 15, 2017
  72. science

    When substances such as sugar and table salt are dissolved in water, the freezing points of the new solutions are lower than the freezing point of water. Also, the more material dissolved, the lower the freezing point. The boiling points of these

    asked by kayci on May 13, 2010
  73. Math

    What is the amount of sales tax owed on a $39 jacket if the tax rate is 5%? $1.85 $1.90 $(1.95) $195.00 A flower arrangement was marked down 12.5%. If the flowers originally cost $20, what is the amount of the discount? $2.40 $(2.50) $2.05 $17.50 Find the

    asked by Help I need somebody not just anybody on February 14, 2017
  74. chemistry

    What is the expected freezing point of a 3.50 m (m standing for molality)aqueous solution of BaCl2(Kfp= 1.86 degrees Celsius/m)? What is the expected boiling point(Kbp= 0.512 degrees Celsius/m)? which is effected to the greater extent, the boiling point or

    asked by Patricia on April 8, 2013
  75. Biology

    a. A human cell is placed in a container of sugar water. Explain what would occur, if the cell membrane is impermeable to sugar. I know that the water in the cell is the high concentration and will go to the sugar water which is the low concentration. b.

    asked by Judy on October 5, 2015
  76. physics (mirrors)

    An object is placed from a concave mirror with a radius of curvature of 50cm. The object has a height of 5cm. a)Calculate the focal lenght of the mirror. b)Calculate the position of the image formed by the mirror. Is the image real or virtual? c)Calculate

    asked by amy on April 25, 2017
  77. Physics

    A 245 g particle is released from rest at point A inside a smooth hemispherical bowl of radius 35.0 cm, as shown in Figure 5-21. (a) Calculate the gravitational potential energy at A relative to B. 1 . (b) Calculate the particle's kinetic energy at B. 2

    asked by Brooks on October 20, 2011
  78. science

    In an experiment to determine the solubility of lead chloride (PbCl2), 5.6g of (NH4)2SO4 was added to a 250ml solution containing an unknown amount of dissolved lead chloride (PbCl2) resulting in the formation of Lead sulfate precipitate. The mass of the

    asked by nelo on July 28, 2014
  79. chemistry

    what is the final temperature of amixture containning 25 grams of ice at -20 degree celciusadded to water at room temperature 22oC mass of water is 50g followed the steps given by you but not getting the answer (0degree celsius) ice at -20 to ice at 0

    asked by treasa on May 13, 2014
  80. English

    1. The water in the glass is fresh. 2. The water of the glass is fresh. [which preposition should we use?] 3. He is swimming in the water. 4. He is swimming in the river. 5. He is swimming in the sea. 6. He is swimming in the lake. 7. He is swimming in

    asked by rfvv on October 19, 2017
  81. Chem(again)

    What is the relationship between the amount of solute and the amount of freezing point depression? delta T = kf m where delta T is the difference between the normal freezing point and the f.p. with a solute, kf is the freezing point constant, and m is the

    asked by Chrissy on February 6, 2007
  82. Chemistry

    Explain clearly which out of the following combinations of solutes would result in the formation of a buffer solution? A) NH3 and HCl in a 2:1 molar ratio B) HCl and NaOH in a 1:2 molar ratio C) NH3 and NH4Cl in a 2:1 molar ratio D) NaOH and CH3COOH in a

    asked by Jill on April 2, 2013
  83. chemistry

    To prepare the titrant fo amonia nitrogen analysis an analyst weight out 1.20 grams of concentration 98% sulfuric acid and brings to 1000 ml in lab pure water. if the molecular weight is 98 calculate the normality of the solution this analyst has prepare.

    asked by Faye on March 26, 2011
  84. physics

    A Nile cruise ship takes 21.7 h to go upstream from Luxor to Aswan, a distance of 208 km, and 19.4 h to make the return trip downstream. Assuming the ship's speed relative to the water is the same in both cases, calculate the speed of the current in the

    asked by stephanie on October 4, 2007
  85. Chem 112

    Calculate the pH of a buffer solution prepared by dissolving 0.12 mole of cyanic acid, HCNO and 0.65 mole of sodium cyanate, NaCNO in enough water to make 1.0 liter of solution. [Ka(HCNO) = 2.0 × 10-4] I know that this question has something to do with

    asked by Bridget on March 21, 2011
  86. PHYSICS

    2.- A man of 73 kg has a volume of 75 l, of which 5 l correspond to the lungs. (a) Calculate the volume of the lungs when going in apnea underwater to a depth of 10 m, assuming that the density of sea water is 103 kg/m3 . (b) At that depth, will the total

    asked by ROB on December 11, 2014
  87. chemistry

    0.550g sample containing only nacl and kbr.it dissolved in water and titrated with a 0.0322M solution of agno3. complete titration of both halides was found to require 30.45ml of agno3 solution. calculate the weight percent of cl in the solid sample.

    asked by jacque on March 28, 2009
  88. physics

    A boat traveling at 116.5 m/s relative to the water aims to go straight across a river. If the river is 153 m wide and the current in the river is 3.50 m/s, how far downstream will the boat land on the other side of the river? Calculate the answer in

    asked by Dalia on January 29, 2017
  89. chemistry

    1.how do you calculate the specific heat of a metallic element if 314 joules of energy are needed to raise the temperature of a 50.0 g sample from 25.0 degrees c to 50.0 degrees c. 2. how do you propose a method for determining the specific heat for a

    asked by S on October 2, 2007
  90. Physics

    A Nile cruise ship takes 21.7 h to go upstream from Luxor to Aswan, a distance of 208 km, and 20.3 h to make the return trip downstream. Assuming the ship's speed relative to the water is the same in both cases, calculate the speed of the current in the

    asked by Shannon on September 11, 2014
  91. Physics

    A cylindrical container 1.5m tall contains mercury to a certain depth, d. The rest of the cylinder is filled with water. If the pressure at the bottom of the cylinder is two atmospheres, what is the depth d? I used this equation: 2atm = 1atm + (density of

    asked by Lhaedy on December 11, 2013
  92. computer

    If you want to insert a column into an existing table, you would click A. on the New Column key. B. the appropriate icon in the Rows & Columns group. C. over the table title. Then you would press the Backspace key. D. in the top cell of the extreme right

    asked by saint on December 17, 2010
  93. Physics

    The mass of a density bottle is 20g when empty,70 g when full of water and 55 g when full of a second liquid.calculate the density of the liquid

    asked by Asha on April 23, 2018
  94. momentum and it's conservation physics

    when a fire hose is hook up to a water supple and the water is turn on the it frequently takes a firefighter to control the hose. why does a fire hose "recoil" when the water is turned on?

    asked by blaz3 on January 15, 2010
  95. Physics , static fluids

    The density of ice is ρ(ice) = 920 kg/m3, and the average density of water is ρ(water) = 1.00 g/cm3. What fraction of the total volume of a block of ice is exposed when floating in water? what does this even mean?

    asked by Andrea on November 26, 2016
  96. AP Chemistry

    Which action(s) will decrease the equilibrium concentration of a non-reacting gas in water? 1. decreasing the temp. of the water 2. decreasing the volume of water 3. decreasing the pressure of the gas above the liquid a. 1 only b. 2 only c. 3 only d. 1 and

    asked by Joe on April 4, 2008
  97. Thermochemistry

    A piece of tin is heated to 695 °C and dropped into 158 g of water at 23.2 °C. The temperature of the system rises to 30.7 °C. What is the mass of the tin dropped into the water? (C = 0.227 J/g°C for tin, C = 4.18 J/g°C for water)

    asked by Brybo on May 30, 2017
  98. science

    when 1 gram of water evaporated the volume of the water vapor increases but the mass remains constant. why does the water remain constant i think because the number of atoms remain constant

    asked by jeff on March 31, 2013
  99. Thermochemistry

    A piece of tin is heated to 695 °C and dropped into 158 g of water at 23.2 °C. The temperature of the system rises to 30.7 °C. What is the mass of the tin dropped into the water? (C = 0.227 J/g°C for tin, C = 4.18 J/g°C for water)

    asked by Brybo on May 30, 2017
  100. MATH

    Chemistry of Life Multiple Choice 1. Which of the following form the main components of our body cells? carbohydrates and proteins fat and phosphorous proteins and iron nucleic acids and calcium 2. Organic compounds always contain______. water oxygen

    asked by Help!!!!!!!!!!!!!! Fast its urgent Please!!!!!!!!! on December 7, 2012