1. chemistry

    how much heat energy would it take change the temperature of 50 mL of water from 23 C to 28 C?

    asked by S on June 26, 2011
  2. Chemistry

    A type of heat that involves no contact at all would be ?? Radiation

    asked by Boberto on April 21, 2016
  3. science

    During condensation, what must be changed, temperature or heat energy?

    asked by kate on March 25, 2013
  4. science

    an iron calorimeter has a heat capacity of 68.85 kJ/oC. what is its mass

    asked by PurpleDinosaur54 on February 18, 2013
  5. Chemistry

    How much heat is produced by the complete reaction of 5.29 kg of nitromethane?

    asked by Isaac on July 28, 2016
  6. biology

    Show that germinatingseeds produce heat energy.

    asked by Anonymous on January 20, 2013
  7. SCIENCE

    HOW MUCH HEAT ENERGY TRANSFERRED TO THE COLD WATER

    asked by LINDSEY on November 15, 2011
  8. science

    HOW MUCH HEAT ENERGY TRANSFERRED TO THE COLD WATER

    asked by LINDSEY on November 15, 2011
  9. Physics

    Why solids conduct better heat than liquids and gases ?

    asked by Anonymous on August 10, 2010
  10. physics

    The principle of conservation of heat energy states that

    asked by temmyth on March 30, 2015
  11. chemistry

    How much heat is needed to raise 300g of Ethanol from 0 C to 20 C?

    asked by Person on June 3, 2010
  12. Chemistry

    How much heat is given off by melting 155 grams of water?

    asked by Sarah on November 18, 2010
  13. physics

    how much energy is needed to heat 50 grams of ethanol

    asked by sas on July 21, 2010
  14. Math

    a rectangular block 16 cm long has two spare faces. A cube of volume 343 cubic centimetre is cut from the rectangular block. Find the volume of the remaining block. Help me pls^

    asked by 大S on June 4, 2012
  15. science

    2. A 75.0 g sample of a metal is placed in boiling water until its temperature is 100.00C. A calorimeter contains 100.00 g of water at a temperature of 24.40C. The metal sample is removed from the boiling water and immediately place in water in the

    asked by Lilian on April 22, 2015
  16. Thermodynamics

    27.300kg of Copper at 35.000 degrees Celsius receives 460.000kJ of heat. Calculate the final temperature of the metal. ANS = degrees Celsius Copper specific heat = 0.39kJ/kg degrees Celsius. Q = mc (t2 - t1) Q = 460.000kJ m = 27.300kg c = 0.39kJ/kg t1 = 35

    asked by Danny on July 5, 2013
  17. Physics (Thermodynamics)

    27.300kg of Copper at 35.000 degrees Celsius receives 460.000kJ of heat. Calculate the final temperature of the metal. ANS = degrees Celsius Copper specific heat = 0.39kJ/kg degrees Celsius. Q = mc (t2 - t1) Q = 460.000kJ m = 27.300kg c = 0.39kJ/kg t1 = 35

    asked by Danny on July 4, 2013
  18. Need 8 grade math help quick please!

    I don't understand this. I don't get exactly what I'm supposed to do with the P(parenthes) thingy or how each question differs from the next. Theoretical and Experimental Probability: A number cube with the numbers 1 through 6 is rolled. Find the given

    asked by Rainshine on March 28, 2014
  19. Chem

    4 NH3 + 3 O2 --> 2 N2 + 6 H2O a.) Assume 3.0 mol O2 completely reacts. Calculate the moles required for the other reactant. Calculate the moles that can be produced for each product. b.) Assume 8.0 mol NH3 completely reacts. Calculate the moles required

    asked by Deni on February 13, 2016
  20. English

    Can someone tell me what's the British for the words "common trash barrels", "sorted trash", "regular kitchen" trash or food/garden waste? Thank you I'm quite environmentally friendly. I have three containers at home into which to sort my trash. One is for

    asked by Frank on January 14, 2014
  21. chemistry 20 MC questions

    1- The equipment needed to carry out a titration is: A) hot plate, pipet, and filter paper B) heat source, test tube, and filter paper C) heat source, pipet, and burette D) erlenmeyer flask, pipet, and burette 2- A student correctly predicted that 10.0 g

    asked by memo on October 22, 2012
  22. Chemistry

    are these items belowed classified as a heterogeneous mixture, a solution, a compound or and element? chalk clear spring water oxygen tomato soup pencil ice and soda sterling silver iron

    asked by Courtney on September 28, 2010
  23. Chemistry

    Calculate the equilibrium concentration of each compound if 0.340 moles of HI are placed in a 5.90 liter container at 520°C. Kc = 0.170 for the reaction at this temperature. soo i tried doing this by setting up an ICE table and finding what x equaled

    asked by Michael on May 10, 2009
  24. Chemistry

    A 156.5 g piece of stainless steel was heated to 510 C and quickly added to 25.11 g of ice at -30 C in a well-insulated flask that was immediately sealed. What will be the final temperature of the system if there is no loss of energy to the surroundings?

    asked by Jerry on October 26, 2008
  25. Math

    For a period of time as an alligator grows, its mass is proportional to the cube of its length. When the alligator's length changes by 15.8%, its mass increases by 17.3kg. Find its mass at the end of this process.

    asked by Rob on August 19, 2008
  26. Geometry-Help PLZ

    Each of 6 cubes has a volume of 64 cubic units. If the figure is reduced in size such that the volume of each new cube is 1/8 the volume of the original, what is the surface area of the 6 cubes after the decrease? I came up with 96 sq units Is this

    asked by Mary on May 25, 2011
  27. Add Math(rate of change)

    The volume of a cylinder increases at a rate of 324cm cube per second. The height, h cm of the cylinder is twice the radius, r cm. Find the rate of change in radius when the radius is 6cm.(use 3over2 pai)

    asked by Michele on January 2, 2017
  28. Calculus

    A spherical fish tank of radius 8 meters is being filled with at a constant rate of Rπ meters cube of water per second. At height 3 meters, the rate of change of the height is 1 meter per second. What is the value of R?

    asked by Mark on July 7, 2013
  29. math

    a rectangular tank 10inches by 8 inches by 4 inches is filled with water if all of the water is to be transferred to cube shaped tanks each one 3 inches on a side how many of these smaller tanks are needed?

    asked by shubham on January 15, 2015
  30. english

    Is this a good sentence with good punctuation in it. For the party we brought cake and ice cream; fruit salad; and punch. Does this have good use of semicolon.

    asked by cindy on August 11, 2009
  31. Chem (HELP!!)

    Test tomorrow too! I don't understand how to do these at all! HELP PLEASE _______________________________ 3.) 11.45 L of milk spilled on the floor. How many gallons spilled? 6.) Suppose 19.0 quarts of water is consumed by a thirsty dessert traveler. How

    asked by Emily on September 22, 2015
  32. Healthcare Finances

    You are considering starting a walk-in clinic. Your financial projections for the first year of operations are as follow: Revenues (10,000 visit) $400,000 Wages and benefits $220,000 Rent $5,000 Depreciation $30,000 Utilities $2,500 Medical supplies

    asked by LaToya on July 21, 2012
  33. sci

    melissa burned her hand on the stove. why did putting her hand in a bowl of cold water make the burn less severe a. cold transferred to her hand from the water by convection. b. cold transferred to her hand from the water by conduction.

    asked by somebody help i am new on December 1, 2014
  34. physics-energy conservation

    a mordern power station,or, more correctly, an energy station, converts heat energy into electrical energy at an efficiency od 50% if the station produces electrical energy at a rate of 1.00GW from burning coal, calculate the mass of coal it burns each

    asked by Emma on May 9, 2007
  35. Science

    When you turn on a battery powered flashlight you transform... 1) heat into light chemical energy 2) chemical energy into electrical energy and light 3)heat into chemical energy and light 4) electrical energy and light energy into chemical energy

    asked by Hannah on January 28, 2016
  36. physics

    The figure here shows four penguins that are being playfully pulled along very slippery (frictionless) ice by a curator. The masses of three penguins and the tension in two of the cords are m1 = 12 kg, m3 = 16 kg, m4 = 21 kg, T2 = 101 N, and T4 = 202 N.

    asked by sara on March 1, 2016
  37. Math

    on july 16, 1882, a massive thunderstorm over Dubuque, Iowa, produced huge hailstones. The diameter of some of the hailstones was 17 in. ICe weighs about 0.033 lb/in^3;. Whas is the approximate weightof a 17 in. hailstone?

    asked by Ellie on January 13, 2011
  38. Chemistry

    Calculate the concentrations of all species present in a 0.33 M solution of ethylammonium chloride (C2H5NH3Cl). Okay so i tried doing HA = H + A ice table regular it doesnt work idk what Ka to use. b/c of the chloride. i have to find [C2H5NH2][H+][OH

    asked by Spencer on February 15, 2009
  39. Physics

    It is probably easy, but i don't know where to start A hockey puck leaves a player's stick with a speed of 9.50 m/s and slides 27.0 m before coming to rest. Find the coefficient of friction between the puck and the ice. Thank You for helping me!!!

    asked by matt on February 25, 2008
  40. social studies

    Despite temperatures of more than 5,000º F, Earth's inner core is solid because of _____________________. a layer of ice just above it. the fact that Earth rotates so quickly. a thickness of over 1,000 miles. great pressure from the layers around it.

    asked by Sammy, !!!Please Answer!! on December 4, 2012
  41. chemistry

    The Ksp for calcium fluoride (CaF2) is 3.9 x 10^–11 at 25°C. How many moles of solid NaF must be added to 1.00 L of 0.100 M CaCl2 in order to precipitate CaF2? Please help me set up this ICE table and understand how to solve this!! thank you!!

    asked by kellie on July 28, 2012
  42. science

    Which group of words names the three states of matter you can observe? a) ice water air b) juice milk water c) solid liquid gas d) hard soft light

    asked by checking hw on February 18, 2009
  43. Science

    Which group of words names the three states of metter you can observe? 1 ice water air 2 juice water milk 3 solid liquid gas 4 hard soft light

    asked by HELP on February 18, 2009
  44. Physics - Heat and phase change

    Consider a 14.3 g sample of steam initially at 100*C. How many kilojoules equal the amount of energy emitted by this sample as it condenses, cools to it's freezing point, and subsequently freezes to form ice at 0*C

    asked by Jos on March 19, 2013
  45. science

    which group of words names the three states of matter you can observe? a ice water air b juice milk water c solid liquid gas d hard soft light

    asked by checking hw on February 18, 2009
  46. physics

    A Hg thermomtr is calibrated by immersing it in melting ice and thn in boiling H20.The column of the Hg is respctively 2.9cm &29cm.Find the temperature whn the column is 10cm long

    asked by Luc on March 27, 2012
  47. Chemistry

    Question: How many grams of AgI can be dissolved in 150.0 mL of a solution that initially contains NaCn at a concentratoin of .440 M? Would the equation be Ag(Cn)2 -> Ag+ 2CN? What numbers go into what place in the ice table. does the .440 M of CN get

    asked by Anonymous on May 11, 2009
  48. Physics

    he weight of the block in the drawing is 77.0 N. The coefficient of static friction between the block and the vertical wall is 0.490. (a) What minimum magnitude of the force is required to prevent the block from sliding down the wall? (Hint: The static

    asked by Samantha on November 7, 2013
  49. Chemistry

    I did a lab today in class and part of the lab is to experimentally find the enthalpy for the dissolution of ammonium chloride by dissolving 4.0 g of NH4Cl(s) in 50.0 mL of H2O(l). I got a -5°C temperature change and calculated delta H to be 15 kJ/mol.

    asked by a Canadian on February 13, 2013
  50. Geology

    Can someone please look this over and let me know if I described the Plate Tectonic Theory? Thanks. Write a 200-300-word summary about two historical figures and the process of mantle convection and plate movement. Two historical figures that contributed

    asked by A.W. on April 8, 2009
  51. science

    Specific heat capacity of solid ethanol is 2.419 J/g C. Melting point temperature of ethanol is -114.4 C/ 158.8 K. Enthalpy of fusion of ethanol is 106.4 J/g. Specific heat capacity of liquid ethanol is 2.440 J/g C. 44.0 g of solid ethanol at -134.4 C is

    asked by Kat on November 23, 2015
  52. math

    A number cube with the numbers 1 through 6 is rolled. find the given probability P(number < 2) (1 point) 1/6 2/6 *** 4/6 3/6 2. P(number ≥ 3) (1 point) 4/6 1/6 2/6 5/6 I think it's A .. I'm not quiet sure. please help 3. P(complement of 4) (1 point) 1/6

    asked by anonymous on March 25, 2015
  53. math

    how do you solve this can you do this with the steps do I an understand them,please. 3 outside the square root like a cube. (square root start) 64x^6/27 (square root end)

    asked by Anonymousab on June 15, 2013
  54. Math

    Wooden blocks are stacked to form a cube 3 block wide, 3 block long, and 3 block high. How many blocks are used? 27 blocks are used

    asked by Jamar on December 14, 2014
  55. Chemistry

    A 100.0 ml sample of 0.300 M NaOH is mixed with a 100.0 ml sample of 0.300 M HNO3 in a coffee cup calorimeter. Both solutions were initially at 35.0 degrees celcius; the temperature of the resulting solution was recorded at 37.0 degrees celcius. Determine

    asked by Kristy on November 10, 2010
  56. Chemistry

    New problem. Any assistance is greatly appreciated. 22.5 ml of ethanol (density=0.789 g/ml) initially at 7.7 deg. C is mixed with 31.6 ml of water (density=1.0 g/ml) initially at 27.1 deg. C in an insulated beaker. Assuming that no heat is lost, what is

    asked by Ben on September 4, 2011
  57. Chemistry

    New problem. Any assistance is greatly appreciated. 22.5 ml of ethanol (density=0.789 g/ml) initially at 7.7 deg. C is mixed with 31.6 ml of water (density=1.0 g/ml) initially at 27.1 deg. C in an insulated beaker. Assuming that no heat is lost, what is

    asked by Ben on September 4, 2011
  58. Calculus

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

    asked by Pauline on March 1, 2016
  59. math

    The volume of a box is the number of cubes it would take to fill it up. If each cube is a centimeter on the edges, the volume would be given in cubic centimeters. What is the volume of the 4cm x 4cm x 6cm box to the right?

    asked by Anonymous on January 17, 2010
  60. Chemistry

    25g of a sample of ferrous sulphate was dissolved in water containing dilute h2s04 and the volume made up to one litre. 25ml of this solution required 20ml of N/10 kmn04 solution for complete oxidation. Calculate the percentage of f2s04 7h20 in the sample

    asked by Ken Hung on January 11, 2014
  61. Chem

    I'm unbelievably stuck on this problem. Any help would be appreciated. Red phosphorous is formed by heating white phosphorous. Calculate the temperature at which the two forms are at equilibrium, given white P: (heat of formation)= 0.00 kj/mol; standard

    asked by Chris on March 4, 2007
  62. Physics 101

    What is the net force of a 5.0 N force and an 7.0 N force acting on an object for each of the following conditions? (a) The forces act in opposite directions. ( )N (b) The forces act in the same direction.( )N ----------------------------------------------

    asked by reda on January 24, 2013
  63. Physics

    On a frozen pond, a person kicks a 10.0 kg sled, giving it an initial speed of 12.2 m/s. How far does the sled move if the coefficient of kinetic friction between the sled and the ice is .10?

    asked by Nicole on December 11, 2009
  64. chem 203

    Br2=2Br When 1.05 mol of br2 is placed in a .950L flask, 1.20% of Br2 undergoes dissociation. Calculate the equilibrium constant Kc, for this reaction. Use ICE table.

    asked by ron on April 13, 2008
  65. Chemistry

    2 Al(s) + 3 Cl2(g) → 2 AlCl3(s) Into a cylinder with a moveable piston (pressure stays constant), a piece of aluminum is placed and chlorine gas is added. After they react, the temperature inside the piston is considerable higher than its initial

    asked by tatyana on October 14, 2017
  66. Physics

    1) On the construction site an electric crane is used to lift materials to the 10th floor. A 180 kW motor requires 2.0 minutes to lift a 10500 kg load if bricks 218 m. How efficient is the crane? 2. Burning 1.0 kg of coal releases 33 MJ of energy. This

    asked by Lucina on December 31, 2014
  67. Chem

    What would a titration curve look like for 25 mL of 0.400 M NH3 (aq) with 0.200 M HCl (aq) -find initial pH -find 1/2 equivalence point pH and volume of HCl required to reach this point -find equivalence point pH and volume required to reach this point

    asked by Sharon on July 18, 2011
  68. MATH

    LAST YEAR BOB'S AGE WAS A SQUARE NUMBER AND NEXT YEAR IT WILL BE A CUBE NUMBER. HOW OLD IS BOB NOW ? PLEASE EXPLAIN HOW YOU WORK IT OUT ,THANKS

    asked by wan on November 14, 2012
  69. maths

    a cube of sides 5 cm is painted on all its faces.if it is sliced in to a 1 cm3.cubes how many 1cm3 cubes will have exactly one of their faces painted?

    asked by shehzad on September 2, 2018
  70. math

    a cube is painted blue,then cut into 27 smaller cubes.how many of the smaller cubes have only two side painted/ggggggggggg

    asked by chrisopher on February 13, 2011
  71. maths

    A box of height 8cm has a volume of 320cm cube.What is the volume of a similar box of height 6cm

    asked by Riliwan on November 22, 2016
  72. L.A.

    which statement best summarizes chapter 11, the Giver 1. Jonas and the Receiver read about snow and other types of weather not found in the community. 2. Jonas experiences tiny pinpricks of snow that touch his body and melt on his tongue. 3. The Receiver

    asked by Halp pls on May 14, 2016
  73. L.A PLEASE HELP

    which statement best summarizes chapter 11, the Giver 1. Jonas and the Receiver read about snow and other types of weather not found in the community. 2. Jonas experiences tiny pinpricks of snow that touch his body and melt on his tongue. 3. The Receiver

    asked by please help on May 19, 2016
  74. HELP ITS LA

    which statement best summarizes chapter 11, the Giver 1. Jonas and the Receiver read about snow and other types of weather not found in the community. 2. Jonas experiences tiny pinpricks of snow that touch his body and melt on his tongue. 3. The Receiver

    asked by Wheee on May 15, 2016
  75. math

    What is the monomial if a cube of a monomial is:1/8 a^27

    asked by maria on December 16, 2016
  76. I'm really stuck on math!

    One-half of the students at Greendale Middle School take art. Two-thirds of the students take Spanish. Deshawn uses a coin and a standard number cube as a simulation of the students at Greendale Middle School. Deshawn lets “T” represent a student

    asked by Ember on February 18, 2016
  77. Math

    One-half of the students at Greendale Middle School take art. Two-thirds of the students take Spanish. Deshawn uses a coin and a standard number cube as a simulation of the students at Greendale Middle School. Deshawn lets “T” represent a student

    asked by Ember on February 18, 2016
  78. math

    One-half of the students at Greendale Middle School take art. Two-thirds of the students take Spanish. Deshawn uses a coin and a standard number cube as a simulation of the students at Greendale Middle School. Deshawn lets “T” represent a student

    asked by heeeeelpppp please on May 6, 2016
  79. Science (Energy)

    Ok i have done 2 experiments (See below) the question i need help with is i need to explain the difference for the two combustions and i just don't know, please help me and thankyou for your help. The Combustion Of Marshmallows Aim To investigate how much

    asked by Paul on December 17, 2010
  80. Math

    How many different combinations can you make with 3 types of ice cream, 2 types of sauce and 2 types of toppings?

    asked by Anonymous on August 4, 2013
  81. Chemistry

    1. The reaction of fluorine with ammonia produces dinitrogen tetrafluoride and hydrofluoric acid. F2(g) + NH3(g) „³ N2F4(g) + HF(g) a. If you have 66.5g NH3, how many grams of F2 are required for complete reaction? b. How many grams of NH3 are required

    asked by Sulon on March 26, 2011
  82. physics

    Water at 50 degrees C can be obtained by mixing together which one or more of the following combinations? Which of the others would have final temperatures higher than 50 degrees C and which lower than 50 degrees C? What will be the final temperatures for

    asked by fifii on November 1, 2011
  83. Physics HELP!!

    The pressure increases by 1.0 x 104 N/m2 for every meter of depth beneath the surface of the ocean. At what depth does the volume of a Pyrex (bulk modulus 2.6 x 1010 N/m2) glass cube, 6.4 x 10-2 m on an edge at the ocean's surface, decrease by 5.8 x 10-10

    asked by James Houl on March 29, 2016
  84. English

    1. He begged me a book. 2. He begged a book of me. 3. He inquired me a question. 4. He inguired a question of me. 5. He required me a pen. 6. He required a pen of me. 7. He demanded me a notebook. 8. He demanded a notebook of me. (Are the pairs all

    asked by rfvv on December 11, 2009
  85. Chemistry

    A 50.0 mL sample containing Cd2 and Mn2 was treated with 49.1 mL of 0.0700 M EDTA. Titration of the excess unreacted EDTA required 17.5 mL of 0.0300 M Ca2 . The Cd2 was displaced from EDTA by the addition of an excess of CN–. Titration of the newly freed

    asked by Chris on October 25, 2012
  86. Chemistry

    Help needed with a calorimeter lab. I have to measure the enthalpy of a neutralization reaction between NaOH and HCl as well as find the concentration of NaOH the following ways. - using the mass and volume of NaOH - Using calorimetric data assuming no

    asked by Bibi on November 17, 2014
  87. chem

    1. Calculate the heat (calories) produced by the solution of 3.75 g of NaOH Hint: Remember that the reaction is exothermic. 2. Calculate the number of calories that would be produced if one mole of sodium hydroxide was dissolved. (ΔHsolnNaOH) For #1.

    asked by Maria on October 19, 2006
  88. geology(this correct)

    Where do metamorphic rocks originate? How are they formed? What are the two categories of metamorphic rocks? What are the distinguishing characteristics between the two categories of rocks? Metamorphic gets their name from change which is called "meta" and

    asked by scooby9132002 on June 12, 2009
  89. chemistry(check my work)

    The freezing point of a solution is A. lower than the freezing point of the solvent alone because higher temperature is required to accelerate solvent molecular motion enough to overcome obstructon by solute particles.. B. higher than the freezing point of

    asked by eng on April 6, 2010
  90. chemistry

    The freezing point of a solution is A. higher than the freezing point of the solvent alone because higher temperature is required to accelerate solvent molecular motion enough to overcome obstruction by solute particles. B. lower than the freezing point of

    asked by allan on April 2, 2008
  91. Math

    Suppose the ice cream shop offers 9 different flavours, and we share 5 scoops. How many ways of ordering are there if All different any combination two scoops of one flavour, two scoops of 2nd, and one of third first one, i did 9! / 5!? second one and

    asked by Elle on November 13, 2016
  92. science

    hey guys, im kinda stuck on my science hw. i don't remember wut condensation is, i think it is when water turns into a water vapor or when ice melts into water.

    asked by A7X a.k.a Aaron on October 7, 2009
  93. physics

    Doug hits a hockey puck, giving it an initial velocity of 6.0 m/s. If the coefficient of kinetic friction between ice and puck is 0.032, how far will the puck slide before stopping? A) 19 m B) 25 m C) 37 m D) 57 m E) 68 m

    asked by anonymous on June 14, 2010
  94. math

    Ben rolls a standard number cube (sides labeled with numbers 1 through 6). Find the probability that Ben rolls a number greater than 2 or an even number.

    asked by please help...thank you on March 27, 2011
  95. math

    a memo cube is1 cubic unit. christine packs 6 memo cubes into a box. there is room in the box for 8 more cubes.what is the volume of the box?

    asked by unsure on March 1, 2013
  96. math

    a memo cube is1 cubic unit. christine packs 6 memo cubes into a box. there is room in the box for 8 more cubes.what is the volume of the box?

    asked by unsure on March 2, 2013
  97. math

    Ben rolls a standard number cube (sides labeled with numbers 1 through 6). Find the probability that Ben rolls a number greater than 2 or an even number.

    asked by becca on July 3, 2012
  98. Chemistry

    How many moles of Cu are required to produce 16.25 g of H2O

    asked by Annette on July 13, 2017
  99. Chemistry

    How many moles of Cu are required to produce 16.25 g of H2O

    asked by Annette on July 13, 2017
  100. chemistry

    how many ml of 6m hcl aq are required to react with .10g of mg?

    asked by reciee on March 21, 2011