1. bio

    why was it important to cover each beaker with a piece of aluminum foil?

    asked by Anonymous on December 19, 2007
  2. Chemistry

    The density of aluminum is . A square piece of aluminum foil, 20.02 on a side is found to weigh 2.573 .What is the thickness of the foil, in millimeters?

    asked by Lisa on February 2, 2013
  3. chemistry

    I did an experiment today called "removing tarnish". we removed tarnish from a fork wrapped in foil paper. Now i have to answer some questions. please correct me if i answer them wrong. im not the best in chemistry. thanks. 1. describe the odor of the

    asked by jontson on April 11, 2013
  4. math

    Volume of Aluminum Foil. One cubic centimeter of aluminum weighs 2.7 grams. If a piece of aluminum foil weighs 5.4 grams, find the volume of the aluminum foil.

    asked by tracey on March 31, 2011
  5. chemistry

    On an activity series for metals aluminum is more active than hydrogen. Write the correct reaction to describe putting a piece of aluminum foil (pure aluminum) in 100 mL of hydrochloric acid

    asked by bob on October 10, 2011
  6. Chemistry

    A 22.0 g piece of aluminum at 0.0°C is dropped into a beaker of water. The temperature of the water drops from 92.0°C to 77.0°C. What quantity of heat energy did the piece of aluminum absorb? Please Help, I'm so lost :( Thank you

    asked by Jane on May 25, 2011
  7. Chemistry

    A 22.0 g piece of aluminum at 0.0°C is dropped into a beaker of water. The temperature of the water drops from 92.0°C to 77.0°C. What quantity of heat energy did the piece of aluminum absorb? Please Help, I'm so lost :( Thank you

    asked by Morgan on May 25, 2011
  8. chemistry

    If your favorite silver jewelry ever tarnishes and you happen to have some aluminum foil on hand, you can actually get rid of some of that tarnish. The tarnish here is actually silver sulfide. If you put the jewelry and aluminum into a dish with enough

    asked by student in revolt on August 21, 2016
  9. AP Bio potato/osmosis lab

    If a potato core is allowed to dehydrate by sitting in open air, would the water potential of the potato cells decrease or increase? i think it decreases but i'm not sure. and if a plant cell has a lower water potential than its surroundings and if

    asked by lisa on October 25, 2006
  10. Physics

    A piece of aluminum is made with a cavity inside the aluminum. To find the volume of the cavity the piece of aluminum is weighed. In the air, the piece of aluminum has a mass of 29.1kg. In water, the piece of aluminum has an apparent mass of 16.2kg. What

    asked by physics on November 12, 2018
  11. Chemistry

    A square of aluminum foil measuring 3.20 inches on each side weighs 275 mg. The density of aluminum is 2.70 g/cm3. Find the thickness (in micrometers) of the foil.

    asked by Katie on February 11, 2011
  12. Chemistry

    A package of aluminum foil covers 75.0 ft^2 and weighs 12 oz. Aluminum has a density of 2.70 g/mL. What is the thickness of the foil in millimeters? (1 in = 2.54 cm, 1 oz = 28.4 g, 1 mL = 1 cm^3)

    asked by Lauren on January 25, 2011
  13. Physics

    A piece of aluminum is made with a cavity inside the aluminum. To find the volume of the cavity the piece of aluminum is weighed. In the air, the piece of aluminum has a mass of 29.1kg. In water, the piece of aluminum has an apparent mass of 16.2kg. What

    asked by Anonymous on November 12, 2018
  14. pvc aluminum charge

    If you rub a piece of PVC pipe with some wool and touch the PVC to Aluminum foil. Will the PVC be charged after rubbing it with wool?? Will the aluminum be charged? Finally can the PVC cause the aluminum to move. Please explain (hint: can the PVC give

    asked by kaylee on January 13, 2009
  15. physics

    If you rub a piece of PVC pipe with some wool and touch the PVC to Aluminum foil. Will the PVC be charged after rubbing it with wool?? Will the aluminum be charged? Finally can the PVC cause the aluminum to move. Please explain (hint: can the PVC give

    asked by kaylee on January 13, 2009
  16. pvc and wool

    If you rub a piece of PVC pipe with some wool and touch the PVC to Aluminum foil. Will the PVC be charged after rubbing it with wool?? Will the aluminum be charged? Finally can the PVC cause the aluminum to move. Please explain (hint: can the PVC give

    asked by kaylee on January 13, 2009
  17. Chemistry

    The dimensions of aluminum foil in a box for sale at a supermarket are 66.6 yards by 12 inches. The mass of the foil is .83kg. What is the thickness of the foil (in cm)? (1in = 2.54 cm)

    asked by Oliver on September 21, 2014
  18. Chemistry

    How can beta radiation be stopped by a piece of aluminum foil?

    asked by Jennifer on September 19, 2010
  19. Chemistry

    A sheet of aluminum foil has a total area of 1.000 ft squared and a mass of 3.636 grams. What is the thickness of the foil in millimeters? (Density of Aluminum is 2.699 grams/cm cubed.)

    asked by Paige on September 12, 2008
  20. Chemistry

    If aluminum has a density of 2.7g/cm^3,what is the mass,in grams of the foil? It states that a package of aluminum foil is 54.3 yd long, 14 inches wide, and 0.00035 inches thick.

    asked by TT on September 19, 2010
  21. Ions & Atoms-Lab Part 1

    We did a lab on Ions and Atoms. The purpose was basically to identify the properties of an ion and compare them to atoms. These were the Materials -safety goggles -apron -copper(II) chloride (CuCl2) -3 250-ml beakers -water aluminum foil -scissors

    asked by Sara on April 19, 2010
  22. algebra

    A rectangular sheet of aluminum foil is 50 centimeters long and 20 centimeters wide, and weighs 5.4 grams. Find the thickness of the aluminum foil in centimeters.

    asked by De Angelis on February 27, 2011
  23. Algebra

    A rectangular sheet of aluminum foil is 50 centimeters long and 20 centimeters wide, and weighs 5.4 grams. Find the thickness of the aluminum foil in centimeters.

    asked by Anonymous on February 13, 2011
  24. physics

    A square piece of foil with area A = 5.0 × 10^-4 m^2 and mass m = 5.0 × 10^-5 kg is suspended along one edge and hangs under its own weight. When light is incident perpendicular to the foil,the foil bends and reaches an equilibrium angle of 2 degrees. If

    asked by Rams on May 14, 2012
  25. physics- Electromagnetic waves

    A square piece of foil with area A = 5.0 × 10^-4 m^2 and mass m = 5.0 × 10^-5 kg is suspended along one edge and hangs under its own weight. When light is incident perpendicular to the foil,the foil bends and reaches an equilibrium angle of 2 degrees. If

    asked by Rams on May 11, 2012
  26. physics- Electromagnetic waves

    A square piece of foil with area A = 5.0 × 10^-4 m^2 and mass m = 5.0 × 10^-5 kg is suspended along one edge and hangs under its own weight. When light is incident perpendicular to the foil,the foil bends and reaches an equilibrium angle of 2 degrees. If

    asked by Rams on May 9, 2012
  27. Ions & Atoms-Lab Part 2

    For those who haven't seen my previous post; I request you to go and search for it, it says Lab part 1 on it. You will not know what I'm asking about, if you don't read it it. Overall nothing will make sense. Thank you very much for all your help. These

    asked by Sara on April 19, 2010
  28. AP Chemistry

    We were given a 12 cm by 12 cm area of aluminum foil (it weighed 0.60 g) and were told to calculate the atomic mass of Aluminum atoms given that the radius of 1 aluminum atom is 143 picometers and the density is 2.7 grams per centimeter cubed, without

    asked by BadatChem on November 15, 2012
  29. Algebra

    A sheet of aluminum (Al) foil has a total area of 2.119 ft2 and a mass of 2.714 g. What is the thickness of the foil in millimeters? (Density of Al = 2.699 g/cm3?

    asked by MissSixx on September 4, 2013
  30. physics

    A 75-g piece of aluminum at 89 °C is dropped in 1.0 L of water at 1.3 101 °C, which is in an insulated beaker. Assuming that there is negligible heat loss to the surroundings, determine the equilibrium temperature of the system

    asked by charles on December 8, 2014
  31. math

    Santana wants to cover a gift box shaped like a rectangular prism with foil. The foil costs $0.03 per square inch. Santana has a choice between Box A which is 8 inches long, 3 inches wide, and 6 inches high, and Box B which is 10 inches long, 3 inches

    asked by Cara on April 23, 2015
  32. Science

    Aluminum foil is lying on the sidewalk in the sun for approx 1 hr. Put an ice cube from a drink and put it on the foil.... Which direction wll the heat energy flow from?

    asked by Kel on January 6, 2008
  33. science

    kevin has a piece of aluminum which has a density of 2.7gms/cm3 and a mass of 63 grams what is the volume of the piece of aluminum

    asked by ricky on September 17, 2007
  34. Science

    A piece of aluminum has a mass of 39.15g and a volume of 14.5cm cube. Determine the density of the aluminum. What would the density be of a much larger piece of aluminum? explain. I established the density of the al. is 2.7g/ cm cube. I don't get the

    asked by Sally on September 23, 2014
  35. chemistry need help

    How many atoms of aluminum are there in 125 g of aluminum foil?

    asked by chrissy on March 25, 2009
  36. chem

    A 25.0 g aluminum block is warmed to 65.2 C and plunged into an insulated beaker containing 55.3g of water initially at 22.0C. the aluminum and water are allowed to come to thermal equilibrium. Assuming that no heat is lost, what is the final temperature

    asked by natash on October 17, 2008
  37. Chemistry

    A sheet of aluminum (Al) foil has a total area of 2.119 ft2 and a mass of 2.714 g. What is the thickness of the foil in millimeters? (Density of Al = 2.699 g/cm3? I got 5.108*10^-4 cm but that is wrong. (2.714g)/(2.699g/cm^3)/(2.119ft^2) * 1ft/30.48cm =

    asked by Andy on September 15, 2013
  38. science

    Two insulated beakers contain different amounts of identical liquids. Beaker A contains twice as much liquid as Beaker B. The temperature of Beaker A is 80°C. The temperature of Beaker B is 40°C. An aluminum rod connects the beakers, and the system is

    asked by Isabel on March 21, 2015
  39. Physics

    A piece of aluminum is attached to a string and suspended in a pool of oil with density 780 kg/m3. If the apparent weight of the aluminum is 590 N, what is the volume of the aluminum?

    asked by Wrenn on November 14, 2015
  40. Chemistry

    I need to determine the "percentage composition unknown" whatever that is. My current data: a) mass of test tube and foil cover: 7.5323 g b)temp of water bath: 375.65 K c) mass of test tube and foil and gas as sample: 7.5423 g d) barometric pressure:

    asked by Selina on November 4, 2010
  41. math

    From the Periodic Table, 1 mole of aluminum weighs 27.0 g., Therefore; If 54.0 g of aluminum are placed into the beaker to react with copper(II) chloride, how many grams of the metal product will be produced?

    asked by chris on January 12, 2012
  42. chemistry

    Surface tension explains which of the follow- ing phenomena? I) A piece of aluminum foil floating on a lake II) A bowling ball sinking more slowly through molasses than through water III) Separating ethanol from water by distillation IV) Water beading on a

    asked by Bob on November 14, 2010
  43. physics

    a 450 cm^3 of aluminum (D = 2.7 g/cm^3) is lowered carefully into a completely full beaker of water? what is the weight of the water, in newtons, that spills out of the beaker?

    asked by denise on October 28, 2015
  44. science

    The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 85°C. The temperature of Beaker B is 40°C. A metal rod connects the beakers. Five minutes later, the temperature of Beaker A is 75°C and the temperature

    asked by Isabel on March 21, 2015
  45. 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 27, 2012
  46. Chemistry

    If I'm going to transfer a piece of metal (a reasonable size) from a beaker of boiling water into a calorimeter, what should I use? Tweezers are too small...I can only think of a beaker clamp, but they are, after all, for beakers.

    asked by Stuck on February 19, 2010
  47. chemistry

    In the chemistry exp molar mass of a volatile liquid what will be the outcome if the hole in the aluminu foil was larger would it make the molar mass high or low. Or what will happen if yhr water vapors condensed under the aluminum foil before the final

    asked by tiffany on April 10, 2012
  48. Chemistry (URGENT)

    How many Al atoms thick is the aluminum foil if it is 0.00157cm thick. 1 Al atom = 286pm Convert pm to m 286pm = 2.86*10^-10m Convert m to cm 2.86*10^-10m = 2.9*10^-8cm Divide aluminum thickness and Al atom thickness 1.57*10^-3 / 2.9*10^-10 = 54138 So the

    asked by John on November 24, 2010
  49. Physics

    These are Thermodynamics questions: There is a 7 kg piece of aluminum at 80°C placed in a 3 kg water at 20°C what is the final temperature? There is a piece of aluminum at 90°C placed in 2 kg of water at 35°C how much energy is transferred if the final

    asked by Maddie on January 13, 2017
  50. Math

    A rectangle sheet of aluminum foilis 50 centimeters long and 20 centimeters wide, and weighs 5.4 grams. 6ind the thickness of the aluminum foil in centimeters.

    asked by madelyn on September 20, 2011
  51. Chemistry

    Two beakers are placed in a sealed container surrounded with air. In one beaker is pure H2O (Beaker A) and the other beaker is a 10% Sugar solution (Beaker B). As the system approaches equilibrium what change occurs to the volume of water in beaker A? What

    asked by Anonymous on January 17, 2008
  52. Chemistry

    A piece of metal A and a piece of metal B of the same mass and at the same temperature of 80°C are dropped into seperate beakers each containing 100.0 g of water at room temperature. Once they equilibrate, you find that the beaker with the sample of metal

    asked by Tatiyana on October 16, 2017
  53. Chemistry

    A piece of aluminum with mass of 5.0 g is immersed in 30.0 g of water. This system is heated electrically from 20.8 to 42.6°C. How many joules of energy are absorbed by the aluminum? (Cpaluminum = 24.4 J/mol-K; 1 mole of aluminum has a mass of 27.0 g)

    asked by Kales on October 23, 2014
  54. Physics

    A piece of aluminum has a volume of 1.55 x 10-3 m3. The coefficient of volume expansion for aluminum is = 69 x 10-6(C°)-1. The temperature of this object is raised from 25.9 to 406 oC. How much work is done by the expanding aluminum if the air pressure is

    asked by Jason on November 23, 2014
  55. Chemistry

    a 15.7 g aluminum block is warmed to 53.2 degrees celsius and plunged into an insulated beaker containing 32.5 g of water initially at 24.5 degrees celsius. the aluminum and the water are allowed to come to thermal equilibrium. assuming no heat is lost,

    asked by sukli on September 14, 2011
  56. Math

    A 515 cm3 block of aluminum (Density = 2.7 g/cm3) is lowered carefully into a completely full beaker of water. What is the weight of the water, in newtons, that spills out of the beaker?

    asked by Alaine' on March 28, 2012
  57. Physics

    A 515 cm3(cm cubed) block of aluminum (D = 2.7 g/cm3) is lowered carefully into a completely full beaker of water. What is the weight of the water, in newtons, that spills out of the beaker?

    asked by Alaine' on March 28, 2012
  58. Chemistry 211

    Which of the following statements is a reasonable explanation for why a percent yield may be less than 100% for the synthesis of the alum, select all that apply. a) The aluminium foil did not completely react b) Some alum sample remained in the beaker and

    asked by Joe on November 24, 2014
  59. chemistry

    valerie placed 1.0g of salt into one beaker, 1.0g of soil into a second beaker, and 2.0g of sugar in a third beaker. She then added 200mL of water to each beaker and stirred the contents for 3 mintues. How many compounds and how many mixtures did Valerie

    asked by callie on November 28, 2011
  60. chemistry

    A student is given 3 beakers: Beaker 1- 50.0 ml of a solution produced by dissolving 6.00 grams of a weak monoprotic acid ,HX, in enough water to produce 1 liter of solution. The empirical formula of HX is CH2O. The solution contains 3 drops of

    asked by ashley on February 12, 2012
  61. Physical Science

    Aluminum has a density of 2.70 g/cm^3. What is the mass of a piece of aluminum that has a volume of 100.0cm^3? How would I figure this out? Thanks so much. :)

    asked by Christy on October 5, 2009
  62. Math

    How much foil is required to cover a rectangular box that is 4 in by 8 in by 5 in?

    asked by Chelle on November 28, 2010
  63. geometry

    how much foil is required to cover a rectangular box that is 4 in. by 8 in. by 5 in.?

    asked by Anonymous on June 14, 2010
  64. physics

    Suppose 560.0 J of heat is added to a 111-g piece of aluminum at 23.0° C. What is the final temperature of the aluminum?

    asked by aok on December 7, 2010
  65. Science

    The density of aluminum is 2.7 the volume of a piece of aluminum if it mass 8.1 grams?

    asked by Fatima on September 5, 2018
  66. science

    A piece of Aluminum wire Android a 50-pound Aluminum both have the same density. Why?

    asked by fransico on June 9, 2011
  67. Science

    What absorbs more heat, aluminum foil or black paper?

    asked by Gopal on September 5, 2012
  68. Chemistry

    If aluminum has a density of 2.7g/cm3,what is the mass,in grams of the foil?

    asked by TT on September 19, 2010
  69. physics

    A beam of 8.3 Mev alpha particles is directed at an aluminum foil. it is found that the Rutherford scattering formula cease to be obeyed at scattering angles exceedin about 60 .if alpha particle is assumed to have a radius 2*10^-15m. find the radius of the

    asked by Asad Ali on June 22, 2017
  70. science

    why does the remote control of a televesion does not function if covered by an aluminum foil

    asked by shanel on October 12, 2016
  71. science

    The two systems shown below are identical except for the rod connecting the two beakers. Initially the temperatures of the beakers are as follows: Beaker A = 88°C Beaker B = 42°C Beaker C = 88°C Beaker D = 42°C Four minutes later the temperatures are

    asked by Isabel on March 21, 2015
  72. Biology Chemistry Part

    I'm trying to calculated the rate of reaction In this lab I took a 50 mL beaker and poured in 10 ml of cold distilled water into it, I then poured in 30 ml of original enzyme solution (I believed we used cold potato juice or something), I then took a piece

    asked by Kate on September 26, 2010
  73. Chemistry

    Would the molar mass become high or low if the hole in aluminum foil was quite large?

    asked by Linda on April 6, 2011
  74. physics

    a 200g aluminum container has 500g of water with an initial temperature of 22 degree celsius. The following heated pieces of metal are dropped into water at the same time as follows: 300g piece of aluminum heated at 100 degree celsius; a 50g piece of

    asked by Anonymous on July 31, 2012
  75. physics

    a 200g aluminum container has 500g of water with an initial temperature of 22 degree celsius. The following heated pieces of metal are dropped into water at the same time as follows: 300g piece of aluminum heated at 100 degree celsius; a 50g piece of

    asked by Anonymous on July 31, 2012
  76. journalism

    Select one of the following assignments and conduct background research online and in your local newspaper. Then write a 250-300 word memo describing what you expect the most important issues to be on your new beat and whom you expect to be your most

    asked by tracy on August 5, 2011
  77. Biology Chemistry Part

    I'm trying to calculated the rate of reaction In this lab I took a 50 mL beaker and poured in 10 ml of cold distilled water into it, I then poured in 30 ml of original enzyme solution (I believed we used cold potato juice or something), I then took a piece

    asked by Kate on September 26, 2010
  78. Geometry

    use 3.14. How much foil is required to cover a rectangular box that is 4in by 8in by 5in?

    asked by Anonymous on May 13, 2010
  79. math (algerbra)

    how do i find the thickness of aluminum foil that weighs 5.4grams and 50cm long and 20 cm wide.

    asked by Eric on June 22, 2011
  80. Chemistry

    Aluminum is more reactive than iron, yet it is used today for a variety of applications in which iron would corrode (cans, rain gutters,etc). The reason for the corrosion durability of aluminum is 1. all aluminum products are treated with a plastic

    asked by Sarah on October 20, 2010
  81. English

    1. The circle was missing a piece. 2. A piece was not in the circle. 3. A piece was missing from the circle. (Does #1 mean #2 or #3?) 4. Think of the after story of the missing piece. On the way the circle met an oval. The oval said, " You look ugly. You

    asked by John on June 14, 2009
  82. chemistry

    You have four beakers labeled A, B, C, and D. In beaker A, you place 100 grams of silver nitrate and enough water to make 50 mL of solution. In beaker D, you place 100 grams of KCl and enough water to make 100 mL of solution. You also pour 100 mL of water

    asked by brandi on April 24, 2008
  83. geometry

    How much foil is required to cover a rectangular box that is 4in. by 8in. by 5in.? use 3.14 as an aproximation for pi. where appropriate.

    asked by DJ on July 17, 2010
  84. Chemistry Stoichiometry

    1. Tin and oxygen gas are reacted together to form Tin (IV) oxide, a solid. If a piece of tin foil, 8.25cm x 21.5cm x 0.60mm (density = 7.28g/cm3) is exposed to oxygen and all the tin reacts, what is the mass of the oxidized tin foil? (98.4g) I am so

    asked by Gweedo8 on May 29, 2009
  85. Algebra

    One more rectangular-shaped piece of metal siding needs to be cut to cover the exterior of a pole barn. The area of the piece is 30 ft². The length is 1 less than 3 times the width. How wide should the metal piece be? Round to the nearest hundredth of a

    asked by Sandra on March 18, 2014
  86. chemistry

    Let's say for example I have 5g of copper in a beaker. Mass would be 5g + mass of beaker. If I add any given amount of water to the beaker containing the copper, that will change the mass of the beaker containing the copper. Am I correct so far? So then if

    asked by J on November 5, 2014
  87. Chem

    What is the balanced net ionic equation for aluminum foil reacting with hydrochloric acid ? (with steps please)

    asked by Amanda on September 8, 2015
  88. Physical Science

    Two identical beakers are both half filled with a liquid. Beaker A contains water and Beaker B contains a liquid that is denser than water. Which of the following is FALSE? a. The pressure at the bottom of Beaker B is greater than that at the bottom of

    asked by Ariel on March 20, 2012
  89. Chemistry

    Would the molar mass become high or low if water vapors condensed under the aluminum foil before the final weighing?

    asked by Linda on April 6, 2011
  90. math/chem

    If aluminum foil has a density of 2.70 g/ml, then how thick would be a 2.22 g sample of foilif it measures 5.0 cm on each side. PLEASE SHOW WORK THX!

    asked by john on September 27, 2013
  91. Math

    A piece of aluminum with an unknown mass ios at 85c and is placed in a 2.00 liters of water at 25.0c. The final temperature becomes 33c. What is the mass of aluminum?

    asked by Dave on November 8, 2012
  92. Chemistry

    Why is a beaker more acurrate to use when measuring the evaporation over a period of time of a liquid instead of an Erlenmayer flask??? I don't know that it is. It depends upon the size of the Erlenmeyer flask, the beaker, how much water is in the

    asked by John on April 19, 2007
  93. AP Chemistry

    The Synthesis of an Iron Oxalato Complex Salt (“Green Crystals”) In this experiment you will synthesize a compound that will contain the elements potassium, iron, carbon, hydrogen, and oxygen. Carbon and oxygen will be present in the compound as

    asked by Colin on October 17, 2012
  94. Math

    In a science experiment, Ms. Dixon's students find that there is 0.00385 times as liquid in Beaker A as in Beaker B after two days. There are 3.5 millimeters of liquid in Beaker B. How much Liquid is in Beaker A?

    asked by Anonymous on December 10, 2013
  95. Science (chemistry)

    Write a balanced chemical equation and state the reaction type for each of the following reactions: a.) nitrogen gas reacts with hydrogen gas forming ammonia (NH3) b.) carbonic acid breaks down to form carbon dioxide gas and water c.) aluminum foil reacts

    asked by Anonymous on April 2, 2014
  96. math

    Beaker A,B and C contain water with a total volume of 1 litre.Beaker B has 125 millilitres less water than beaker A. Beaker B has twice as much water than Beaker C.Find the volume of water in beaker B.

    asked by harry on September 3, 2015
  97. Math

    Vidya wants to cover a gift box whose dimensions are 20 cm,30cm and 8cm. She has a piece of paper of area 1 metre square. Will she be able to cover the gift? Explain.

    asked by Harjot on January 25, 2018
  98. AP Chemistry--gas law questions

    Hey, My AP Chem class did a lab for determing the molar mass of a volatile liquid by vapor density. There are a few calculations that I can't seem to get: 1.) The moles of air displaced by the volatile liquid vapor (at RT) 2.) The molar mass of air

    asked by Warren on November 25, 2006
  99. Chemistry

    Please help me with the questions at the end of this chemistry lab.Thank you for any help you can provide. 1. This experiment requires you to do 7 trials with varying amounts of Na©üCO©ý. 2. Take a clean 50 mL beaker from the Glassware shelf and place

    asked by Tony on January 19, 2012
  100. Chemistry

    The temperature of 100.0g of water initially at 25.0 degrees C in a calorimeter increases to 30.0 degrees C after adding a 20.0g piece of hot aluminum. What was the temperature of the aluminum before adding it to water? The specific heat of water and

    asked by Jaclyn on February 22, 2011