1. Chemistry

    What is the element whose 4+ cation has the following set of quantum numbers, n=3, l=2, ml=0, and m.s=+1/2 for its highest energy electron? I know, based on the quantum numbers, that its referring to a 3d sublevel. How can I find the solution? Thanks

    asked by Ceamus Angelina on April 6, 2018
  2. science

    Is ATP synthesized when chemical bonds between carbon atoms are formed during photosynthesis OR when energy stored in chemical bonds is released during cellular respiration?

    asked by ari on February 25, 2007
  3. Physics

    Electrons are accelerated in the picture tube through a potential difference of 8000 V. What is the change in the potential energy of each electron traveling in this tube? charge of -e is 1.6E-19 C and its mass is 9E-31 kg.

    asked by Mike on February 4, 2008
  4. physics

    Consider a ball of mass m1 moving with a velocity u1 collides elastically with a ball of mass m2 at rest.Show that the maximum energy transfer takes place when m1=m2.

    asked by Nantu on September 2, 2011
  5. Physics

    A hallway display of energy is constructed in which several people pull on a rope that lifts a block 1.15 m. The display indicates that 0.95 J of work is done. What is the mass of the block? Walk through would be great

    asked by Zdeno on November 2, 2011
  6. Science grd 9

    Determine which appliance uses the most electrical energy: a clothes dryer that operates for 30 min/day or a freezer that operates for 24h/day. Please show work

    asked by Gagan on December 2, 2010
  7. Basic science

    An orange of mass 40g falls freely from the tree to the ground through a distance of 2.5m. Calculate the potential energy of the orange before it hits the ground. g=10m/s²

    asked by Romeo on June 27, 2018
  8. Physical Science-Physics

    You need to pick up a book off the floor and place it on a table top that is 0.78 m above ground. You expend 1.56 J of energy to lift the book. The book has an acceleration of 1.54 m/s squared. What is the book's mass?

    asked by Gracie on October 23, 2015
  9. Chemistry

    Calculate the surface energy of the (100) surface of niobium. The enthalpy of atomization of niobium is 745 kJ/mole. Express your answer in units of J/cm2.

    asked by Ankur on January 11, 2013
  10. Chemistry

    Calculate the standard free-energy change for the following reaction at 25 C degrees. 2Au^3+(aq)+3Ni(s) 2Au(s)+3Ni^2+(aq) Ni2+(aq) + 2e¨C ¡ú Ni(s) E=¨C0.26 Au3+(aq) + 3e¨C ¡ú Au(s) E=+1.498 G= ? KJ Would it be G=1.758?

    asked by Anon on March 31, 2013
  11. Chemisty

    How much heat energy is released to surrounding when 15.0 g of water at 35°C is converted into ice with a temperature of -45°C? vap = 2260 J/g; Hfus = 334 J/g; Cp(ice) = 2.06 J/g • °C; Cp(water) = 4.18 J/g • °C; Cp(steam) = 1.99 J/g •

    asked by Stephen on April 8, 2010
  12. Chem

    Calculate the enthalpy change in the reaction of H2 with F2 to produce HF. The H–H and F–F bond energies are 436 and 155 kJ/mol, respectively, and the H–F bond energy is 567 kJ/mol H2 (g) + F2 (g) --> 2HF (g)

    asked by Erin on December 5, 2017
  13. Science

    Which of the following is NOT a characteristic that all organisms share? Select one: a. ability to taste and smell b. ability to use energy c. ability to grow and develop d. ability to sense and respond to change

    asked by Anonymous on January 25, 2013
  14. physics

    15.0 meters from a sound source that radiates freely in all directions, the intensity is 0.000550 W/m2. What is the rate at which the source is emitting sound energy? answer in Watts.

    asked by tariq m on April 5, 2011
  15. physical science

    If sam drops a 40 kg mass from a height of 20 meters on earth how much was the potential energy of the mass before he dropped it a-800 j b-784 n-m c-800 n-m d-7840 j e- 200 j

    asked by erika on March 14, 2017
  16. Chemisty

    For an electron in a hydrogen atom, the z component of the angular momentum has a maximum value of Lz = 4.22 x 10-34 J·s. Find the smallest possible value (algebraically) for the total energy (in electron volts) that this atom could have

    asked by Beth on July 29, 2012
  17. Physics

    a motor lifts a 12 kg mass to a height of 15 meters at a content velocity in 3.5 seconds. a) find the power b) if the motor is only 35% efficient find the input energy

    asked by Unknown on June 16, 2014
  18. chemistry

    Sodium chloride is decomposed into the elements sodium and chlorine by means of electrical energy. How many grams of chlorine gas can be obtained from 2.50 mol NaCl?

    asked by anna on May 4, 2010
  19. physics

    The specific heat capacity is 1800 J/Kg/K .Calculate the amount of energy liberated when 7kg of the liquid cools from 70 Degrees Celcius to 35 degrees celcius

    asked by zaheer on June 1, 2013
  20. Chemistry

    (a) Calculate the standard free-energy change (ΔG°) for the following oxidation-reduction reaction. Cu(s) + Br2(aq) → Cu2+(aq) + 2 Br−(aq) (b) Calculate the equilibrium constant for this reaction at 298 K.

    asked by Anonymous on April 16, 2018
  21. chemistry

    I'm so irritated i cannot come up with the right answer. When 1662 J of heat energy is added to 45.9 g of hexane, C6H14, the temperature increases by 16.0 °C. Calculate the molar heat capacity of C6H14.

    asked by smh on October 21, 2012
  22. Physics

    You have a 120g yoyo that you are swinging at 0.9m/s. How much energy does it have? How high can it get above the lowest point of the swing without your doing any additional work, or Earth? How high could it get on the Moon, where gravity is 1/6 Earth's?

    asked by Anonymous on July 20, 2018
  23. Physics

    Water is pumped at 120m^3/min from a lake into a tank 35 m above the lake. (a) What power, in kW, must be delivered by the pump? (b) What is the increase in potential energy of the water each minute?

    asked by Sotha Bun on March 30, 2017
  24. physics

    An unknown magnetic field produces a set of lines for a transition from a state with l = 3 to one with l = 2, between which there is a maximum energy difference of 6.1x10-4 eV. How many lines are there? What is the magnitude of the field?

    asked by alice on May 20, 2011
  25. Physics

    Assume a spring has an un-stretched length Xo. Write an expression for the elastic potential energy of the spring in terms of the position of the end of the spring X and its spring constant K.

    asked by Tim on March 14, 2014
  26. Chemistry

    How many grams of ethanol, C2H5OH, can be boiled with 343.0 kJ of heat energy? The molar heat of vaporization of ethanol is 38.6 kJ/mol I'm not sure how I am supposed to set this problem up. Can someone help me, please?

    asked by Chris on November 5, 2015
  27. Science

    The electron in a helium ion moves from a Bohr's orbit whose principal quantum number is 4 to another whose quantum number is 6.calculate the energy of transition in this process.

    asked by Olushola on April 14, 2015
  28. special relativity

    A projectile of rest mass M1, total energy E1, and momentum p1, is directed at a stationary target of mass m2. Find the the velocity of the centre-of-momentum frame .

    asked by Deforest on June 7, 2011
  29. PHYSICAL SCIENCE

    A 1.0 kg metal head of a geology hammer strikes a solid rock with a velocity of 5.0 m/s. Assuming all the energy is retained by the hammer head, how much will its temperature increase?

    asked by Sarah on November 2, 2007
  30. Physics-Heat

    Calculate and compare the temperature changes of copper (specific heat of 0.09c/gC) to glass (Specific heat of 0.20 c/gC) when 535 g of each substance are given 1,500c of thermal energy.

    asked by Anonymous on March 24, 2017
  31. Chemistry 101

    A piece of metal weighing 10.65 grams releases 3450 joules of heat energy when it is cooled from 99.9c to 28.5c. Wheat is the specific heat capacity of the metal in J/g c..

    asked by Lilly on January 28, 2016
  32. Chemistry

    A reaction : A(aq)+B(aq) --> C(aq) has a standard free-energy change of –4.01 kJ/mol at 25 °C. What are the concentrations of A, B, and C at equilibrium if, at the beginning of the reaction, their concentrations are 0.30 M, 0.40 M, and 0 M,

    asked by Alex on April 28, 2014
  33. Physics

    From a height of 30.5 , a 1.45 bird dives (from rest) into a small fish tank containing 49.0 of water. What is the maximum rise in temperature of the water if the bird gives it all of its mechanical energy?

    asked by Jack on May 16, 2013
  34. business

    college students purchase many more energy drinks during finals week than during the rest of the semester shift of the demand curve or movement along the demand curve

    asked by kussmodar on September 25, 2014
  35. college physics

    An 80kg man walks down a ramp that makes a 40 degree angle with the horizontal. By how much does his gravitational potential energy change (in kJ) when he walks 15m down the ramp?

    asked by neosha on June 24, 2010
  36. physics

    An aluminum block absorbs 1.0 x 104 J of energy from the Sun when its temperature increases by 5.0 °C. What is the mass of the block? the specific heat capacity of aluminum is 920

    asked by emily on December 19, 2017
  37. Physics

    A block on a spring moves in SHM with amplitude 0.23 m and period 3.8 s. The mass of the block is 2.1 kg. What is the total energy of the system? Can someone please take me step by step and show me what my answer should be? Thanks!

    asked by Kate on June 24, 2012
  38. Physics

    A battery charger is connected to a dead battery and delivers a current of 4.5 A for 6.0 hours, keeping the voltage across the battery terminals at 12 V in the process. How much energy is delivered to the battery?

    asked by Mary on September 6, 2007
  39. physics

    If you do 500J of work to elevate a bucket of water, what is its gravitational potential energy relative to its starting position? 500*10=5,000 5,000/500=10

    asked by Lara on March 13, 2015
  40. science

    Calculate the surface energy of the (100) surface of niobium. The enthalpy of atomization of niobium is 745 kJ/mole. Express your answer in units of J/cm2.

    asked by harry on January 12, 2013
  41. Physical Chemistry

    15.The Rydberg constant for the Be3+ ion is 109731 cm–1. Calculate the ionization energy of a ground-state Be3+ ion. 22.How many electrons can occupy the following subshells: (a) 2s, (b) 4d, (c) 6f, (d) 6g, (e) 6h?

    asked by S on August 8, 2017
  42. physics

    Calculate the cost of operating a 65 W light bulb continuously for a 30-day month when electrical energy costs $0.23/kW·h. $ 1 How do you calculate cost? whats the equation?

    asked by Alice on May 11, 2012
  43. science

    I am a main group element. I have 3 p-orbital electrons in my valence shell. I have a lower first ionization energy than arsenic. I am not the largest atom in my group. What element am I?

    asked by Mat on September 22, 2009
  44. Science

    Calculate the quantity of energy required to change 3.00 mol of liquid water to steam at 100°C. The molar heat of vaporization of water is 40.6 kj/mol

    asked by Emily on March 25, 2013
  45. Physics

    A blue supergiant star has a radius of 7.4 × 10^10 m. The spherical surface behaves as a blackbody radiator. If the surface temperature is 2.4 × 10^4 K, what is the rate at which energy is radiated from the star? 2 × 10^3 J/s 4 × 10^19 J/s 2 × 10^32

    asked by Anonymous on November 20, 2017
  46. Moorpark

    Ice has negative caloric content. How much energy, in each of the following units, does your body lose from melting 175g of ice? Express your answer in J, kJ, cal, Cal

    asked by Nicole on November 16, 2015
  47. Physics

    A certain material has a work function 0 (angle sign) = 1.5 eV. a)what is the frequency of a photon that ejects an electron from his material, giving the electron an energy of 1.6 eV? b)what type of EM radiation is this?

    asked by Jared on April 20, 2017
  48. chemistry

    calculate the heat energy required to raise the temperature of a 500 gram iron pipe from 25 degrees celcius to 100 degrees celcius

    asked by zigggy on January 6, 2010
  49. Physics

    Assume a spring has an un-stretched length Xo. Write an expression for the elastic potential energy of the spring in terms of the position of the end of the spring x and its spring constant k.

    asked by Tim on March 13, 2014
  50. Chemistry

    In a gaseous system at equilibrium with its surroundings, as molecules of A(g) collide with molecules of B(g) without reacting, the total energy of the gaseious system 1. decreases 2. increases 3. remains the same

    asked by A on April 13, 2009
  51. Chemistry

    calculate the amount of heat energy in joules to condense 125g of steam at 100 degrees celcius and cool to the liquid to 15 degrees celcius?

    asked by Kimberly on April 20, 2012
  52. Thermochemistry

    I'm confused about the difference between the q in q=mc(Tf-Ti) and (Delta)H, or enthalpy. What exactly does enthalpy mean and how is that different than q? (I'm also confused about what Gibbs Free Energy actually means; I know that if it's negative, the

    asked by Kevin on December 2, 2008
  53. college physics

    A horizontal spring with a spring constant k = 322 N/m is uncompressed from a length of 1.4 cm back to its unstretched length. Calculate the change in potential energy in Joules to 2 s.f.

    asked by wes on June 7, 2014
  54. chemistry

    The first order rate constant for the decomposition of N2O2 of 0Cis 5.2*10/6 per minute. If the activation energy is 6200J/mol, calculate the rate constant at 25C

    asked by hadiza on December 13, 2016
  55. Physics

    1) The speed of light in a certain liquid is 3/5 the speed in a vacuum. What is the index of refraction of the liquid? 2) A ray of light strikes a piece of glass (n=1.52) and makes an angle of 50 degrees with the surface. What angle does the refracted ray

    asked by Ninzy on February 16, 2011
  56. Physics

    1) The speed of light in a certain liquid is 3/5 the speed in a vacuum. What is the index of refraction of the liquid? 2) A ray of light strikes a piece of glass (n=1.52) and makes an angle of 50 degrees with the surface. What angle does the refracted ray

    asked by Ninzy on February 16, 2011
  57. A2 Chemistry

    This question is about the unnecessary production of carbon dioxide Outdoor flames, such as patio heaters and the Olympic flame, contribute to global warming. This is not only due to the heat released, but also due to the carbon dioxide produced from the

    asked by Chris on February 11, 2013
  58. calculus

    In February, 2002, each episode of "Becker" was typically seen in 8.3 million homes, while each episode of "The Simpsons" was seen in 7.5 million homes. Your marketing services firm has been hired to promote Bald No More, Inc.'s, hair replacement process

    asked by lc on December 7, 2011
  59. physics-mechanics-collisions,momentum, impulse

    You are at the controls of a particle accelerator, sending a beam of 2.40×107 protons (mass ) at a gas target of an unknown element. Your detector tells you that some protons bounce straight back after a collision with one of the nuclei of the unknown

    asked by HANNE on October 28, 2012
  60. physics

    A lazy Susan consists of a heavy plastic disk mounted on a frictionless bearing resting on a vertical shaft through its center. The cylinder has a radius R = 10 cm and mass M = 0.24 kg. A cockroach (mass m = 0.015 kg) is on the lazy Susan, at a distance of

    asked by marcel on May 22, 2012
  61. Chemistry

    Urgent! Considering the following equation. Na2Co3(s)+H3Po4(s)=>Na3Po4(s)+H2O(l)+CO2(g). a) what's the energy amount envolved in the reaction? b)what is the volum of the released gas? c)what the volum of the consumed phosphate acid, considering d=1,69g/ml?

    asked by Usuario on May 27, 2012
  62. Inorganic chemistry

    The standard free energy change for a chemical reaction is -18.3kJ/mole. What is the equilibrium constant for the reaction at 87 degrees Celsius? (R=8.314J/K*mol) Delta G = -Rtlnk -18,300/8.314/360 = -6.114

    asked by Steve on May 12, 2009
  63. Chemistry

    Tube worms that survive near geothermal vents of hydrogen sulfide rely on bacteria living inside them to obtain energy by the oxidation of H2S to SO4^2-. What is the overall change in the oxidation number of sulfur for this reaction?

    asked by Help on June 26, 2012
  64. Science

    Trees don’t eat like the sheep in the image above. Construct an explanation as to how they get the energy they need for survival. Be sure to include the organelles in the cells that contribute to these different functions. I don't under stand it and it

    asked by LOL on January 28, 2018
  65. Chem

    Directions: Use the principles of atomic structure and/or chemical bonding to explain each of the following. In each part, your answer must include references to both substances. Problem: The carbon-to-carbon bond energy in c2h4 is greater than it is in

    asked by Chemistry on November 19, 2007
  66. physics

    Describe the energy conversions that occur in each of the following devices: a. an incandescent lightbulb b. a clothes dryer c. a digital clock radio We will be happy to critique your thinking. Heat is produced in all, and some light is produced in two.

    asked by Ron on April 29, 2007
  67. Science Help Please

    Which of the following is not among the advantagees of generrating nuclear energy? A.it does not release carbon dioxide into the atmosphere B. it does not require a specialized process or involve any risk C. it does not release chemicals that cause acid

    asked by Callie on November 25, 2014
  68. Physics

    A 150g fircracker is thrown at 66km/h . It explodes in the air into two pieces, with a 42g piece continuing ahead at 93km/h.How much energy is gained in the explosion by the two pieces. I know you use k=1/2mv^2 though, do you use m1v1+m2v2=(m1+m2)vf I am

    asked by Jacob on April 13, 2009
  69. Physics 8B

    A 280 electric motor is 90% efficient, meaning that 90% of the energy supplied to it ends up as mechanical work. If the motor lifts a 210 weight at 3.5 , how much current does it draw? Express your answer using two significant figures. I= ? Amps

    asked by HELP on September 18, 2011
  70. physics

    A puck is released on an air table inclined by 0.1rd with respect to horizontal. By applying the principle of conservation of the mechanical energy of the system ,calculate the velocity of the puck after 40 cm journey along a line of greatest slope.

    asked by angy on September 19, 2016
  71. physics

    Calculate the change in internal energy of 2kg of water at 90 degree Celsius when it is changed to 3.30m3 of steam at 100oC . The whole process occurs at atmospheric pressure. The latent heat of vaporization of water is 2.26×106J/kg

    asked by NDuka on December 4, 2013
  72. phy

    Calculate the change in internal energy of 2kg of water at 90 degree celcius when it is changed to $3.30m^{3}$ of steam at $100 ^{o}$C. The whole process occurs at atmospheric pressure. The latent heat of vaporization of water is $2.26\times10^{6}$ J/kg.

    asked by Emma on March 18, 2015
  73. physics (please help I have a test tmrw)

    How much thermal energy is released when 500g of steam at 100 degrees C condenses into liquid water and then cools to 50 degrees C? I tried to solve q=mct for q and then use that in the q=mLv formula but it didn't work. The answer is 1.3x10^6J Help would

    asked by anon on April 20, 2017
  74. Biology

    A farmer sets up a buffalo farm in this ecosystem. Over time, the buffalo greatly reduce the grass biomass in the community. Explain how the introduction of this new species could affect the amount of energy transferred within the food chain.

    asked by Abigail on September 14, 2016
  75. chemistry 122

    81) According to the following thermochemical equation, what mass of HF (in g) must react in order to produce 345 kJ of energy? Assume excess SiO2. SiO2(s) + 4 HF(g) �� SiF4(g) + 2 H2O(l) DH°rxn = -184 kJ 81) A) 173 g B) 37.5 g C) 150. g D)

    asked by sean on December 11, 2012
  76. Chemistry

    Glucose, C6H12O6, is a good source of food energy. When it reacts with hydrogen, carbon dioxide, and water are formed. How many liters of Co2 are produced when ___ grams of glucose completely react with oxygen?

    asked by breanna on May 26, 2011
  77. science

    how many of its photons are required to ionize atomic hydrogen? Einstein quote for Lenard’s measurement of the “largest effective wavelength for air”=190 nm,, For this problem, take the energy of the ground state of the hydrogen atom to be

    asked by nnn on April 28, 2015
  78. Organic Chem

    Rank these conformational isomers in order of decreasing potential energy? Highest on the left and lowest on the right. To rank items as equivalent, overlap them. Here is a link to the picture of the problem: ht+tp+:/+/bit+.ly/+8ZHeDA Remove the '+' sign

    asked by Random User on April 19, 2010
  79. phy

    Calculate the change in internal energy of 2kg of water at 90 degree Celsius when it is changed to 3.30m3 of steam at 100oC . The whole process occurs at atmospheric pressure. The latent heat of vaporization of water is 2.26×106J/kg

    asked by christ on January 24, 2013
  80. Chemistry

    An electron ps from the 6th to te 3rd energy level in the hydrogen atom: a) calculate the wavelength b) calculate the frequency c) calculate te enrgy d) into which spectral series would the photon be grouped? (i really just need to formulas, then i could

    asked by Ella on May 23, 2011
  81. Physics

    A 3.00-g bullet (c = 0.0305 cal/g . C° = 128 J / kg . C°) moving at 180 m/s enters a bag of sand and stops. By what amount does the temperature of the bullet change if 80% its KE becomes thermal energy that is transferred to the bullet? Thank ´s fir

    asked by Ben on November 3, 2013
  82. physics

    Electronic flash units for cameras contain a capacitor for storing the energy used to produce the flash. In one such unit, the flash lasts for a time interval of 1.49×10−3 with an average light power output of 2.60×105 .

    asked by Anonymous on August 25, 2010
  83. Biology: Evolution

    Scientists suggest that two energy sources, __________ and __________, broke the bonds in the gases in Earth's primitive atmosphere, releasing atoms to form __________. Help! I forgot my book at school! Please!

    asked by MW on May 18, 2008
  84. computers

    a) Different types of storage devices are optimal for different situations. Explain what situations are appropriate for the following devices and explain why: Hard disk Floppy disk RAM CD ROM Tape b) Explain the role of each of the following in determining

    asked by ed on May 11, 2008
  85. science(chem)

    Consider the following errors that could be made when running the TLC. Indicate what should be done to correct the error. a) A 2 component mixture containing 1-octene and 1,4- dimethylbenzene gave only 1 spot with and Rf value of 0.95. The solvent used was

    asked by ~christina~ on October 8, 2007
  86. Math

    Amy and Ashley bike along the same trail. Amy bikes the entire trail at a speed of 20 mph and Ashley bikes it at a speed of 15 mph. Amy finishes biking the entire trail 8 minutes before Ashley. How many miles long is the bike trail?

    asked by Anonymous on June 5, 2016
  87. Maths

    Amy and Ashley bike along the same trail. Amy bikes the entire trail at a speed of 20 mph and Ashley bikes it at a speed of 15 mph. Amy finishes biking the entire trail 8 minutes before Ashley. How many miles long is the bike trail?

    asked by Simon on May 28, 2016
  88. Math

    Having a lot of trouble with this one: Q) Tidal volume is the volume of air displaced in the lungs between inhalation and exhalation (the amount of air in a breath). The residual volume is given by the remaining in the lungs even after the deepest

    asked by Anonymous on October 7, 2014
  89. physics

    the required takeoff speed for a large airplane is 180mi/hr(80m/s)the plane is capable of accelerating at a rate of 4m/s^2 assume the plane starts at rest, determine the minimum runway length required for this plane to safely take off, a smaller airplane

    asked by scott on August 1, 2016
  90. Physics

    A jet plane has a takeoff speed of Vto=125km/h (34.72 m/s) and it's engines can power it to accelerate with an average acceleration of 5.6 m/s^2. A.) what length of runway will it need to take off safely? B.) suppose it had an available runway length of

    asked by Michelle on February 8, 2014
  91. physics

    A 301-kg boat is sailing 16.5° north of east at a speed of 2.08 m/s. Thirty seconds later, it is sailing 37.2° north of east at a speed of 3.60 m/s. During this time, three forces act on the boat: a 32.7-N force directed 16.5° north of east (due to an

    asked by Anonymous on October 3, 2012
  92. Physics

    A 301-kg boat is sailing 16.5° north of east at a speed of 2.08 m/s. Thirty seconds later, it is sailing 37.2° north of east at a speed of 3.60 m/s. During this time, three forces act on the boat: a 32.7-N force directed 16.5° north of east (due to an

    asked by Anonymous on October 9, 2012
  93. physics

    A 48-kg box is being pushed a distance of 7.5 m across the floor by a force Upper POverscript right-arrow EndScripts ⁢ whose magnitude is 185 N. The force Upper POverscript right-arrow EndScripts ⁢ is parallel to the displacement of the box. The

    asked by Hannah on November 18, 2015
  94. physics

    While taking a plane flight to a meeting, a physicist decides to do a mental calculation of how much fuel the plane would consume in the absence of friction, assuming its engines have an efficiency of 22.0% and the mass of the plane is 200,000 kg. Each

    asked by Justin on July 26, 2013
  95. physics

    While taking a plane flight to a meeting, a physicist decides to do a mental calculation of how much fuel the plane would consume in the absence of friction, assuming its engines have an efficiency of 22.0% and the mass of the plane is 200,000 kg. Each

    asked by Justin on July 28, 2013
  96. chemistry

    Energy in the amount of 470 J is added to a 30.0 g sample of water at a temperature of 9.00 degrees C. What will be the final temperature of the water?

    asked by Mary on January 16, 2012
  97. chemistry

    how many joules of energy must be removed from 325g water at 35 degress celsius to form ice at 0 degress celsius?

    asked by tna on July 3, 2012
  98. Science

    When the energy of a sound wave is transferred to a particle of a medium and causes it to vibrate and generate heat, the sound wave is......

    asked by Mark Ronson on March 26, 2015
  99. Biochemistry

    Calculate the free energy of hydrolysis of ATP, ADP, Pi concentrations are 3.4, 1.3, and 4.8 mM respectively. (ATP hydrolysis has delta G= - kJ/mol)

    asked by Help Pleasssssssse!!! on October 6, 2010
  100. physics

    If 250 joules of work are performed by an engine using 600 joules of energy in 5 seconds, what is the efficiency of the engine?

    asked by anonymous on October 29, 2014

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