Questions Asked in February 2009

Most Popular Questions of February 2009

  1. algebra 1 page 167 did you hear about...

    i need to finish the riddle. did you hear about... who knows this?

    asked by faith on February 22, 2009
  2. spanish help quick!!! i have to submit my answers!

    so we are learning the pred. v imperfect but i don't know when to use which i sort of have an idea like habitual inturrupting etcetc but i get them all wrong El lunes pasado yo _tuvé__ una discusión con un compañero de clase. La discusión __comenzaba_

    asked by hayden on February 21, 2009
  3. Chemistry

    Le Chateleir`s Principle Please check if my answers are right and i dunt know some of them: Consider the following system at equilibrium: A(aq)+B(aq) 2C(aq) Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or

    asked by Saira on February 5, 2009
  4. chem

    Arsenic acid (H3AsO4) is a triprotic acid with Ka1 = 5 10-3, Ka2 = 8 10-8, and Ka3 = 6 10-10. Calculate [H+], [OH -], [H3AsO4], [H2AsO4-], [HAsO42-], and [AsO43-] in a 0.20 M arsenic acid solution. i cant do this. i don't even know how to start.

    asked by Cab on February 15, 2009
  5. 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
  6. music

    What is the main difference between Baroque and Classical music? I think barouge music is based on emotion but am not sure.

    asked by heather on February 4, 2009
  7. physics

    please show me in steps how to solve this thanks alot! A bobsled zips down an ice track, starting from rest at the top of a hill with a vertical height of 150m. Disregarding friction, what is the velocity of the bobsled at the bottom of the hill? (g=9.81

    asked by y912f on February 14, 2009
  8. Chemistry: help please

    What is the millimolar solubility of oxygen gas,O2, in water at 20 degree celsius, if the pressure of oxygen is 1.00atm?

    asked by Erin on February 1, 2009
  9. english

    What is a simile, idiom, or metaphor for relief?

    asked by Dani on February 3, 2009
  10. Chemistry

    For the reaction shown, compute the theoretical yield of product (in grams) for each of the following initial amounts of reactants. 2Al(s) +3 Cl2(g) ---> 2 AlCl3(s) A. 2.5gAl , 2.5g Cl2 B. 7.7 g Al , 25.2 g Cl2 C. 0.240 g Al , 1.10 g Cl2

    asked by anonymous on February 11, 2009
  11. Calculus

    How do I solve lim(x-->pi/4)(sinx-cosx)/cos(2x) The (x-->pi/4) goes below the lim. Should i just substitute the x's with pi/4??

    asked by Alex on February 21, 2009
  12. statistics help needed

    In the game of roulette, a steel ball is rolled onto a wheel that contains 18 red, 18 black, and 2 green slots. If the ball is rolled 24 times, find the probability of the following events. A. The ball falls into the green slots 4 or more times.

    asked by Jordana on February 22, 2009
  13. Pre-Calculus

    A road sign at the top of a mountain indicates that for the next 4 miles the grade is 12%. Find the angle of the grade and the change in elevation for a car descending the mountain.

    asked by Henry on February 5, 2009
  14. Alegra II

    Why isn't a snowman very smart?

    asked by Sue on February 10, 2009
  15. chemistry

    A sample of 1.00 mol H2O(g) is condensed isothermally and reversibly to liquid water at 100°C. The standard enthalpy of vaporization of water at 100°C is 40.656 kJ mol−1. Find w, q, ∆U, and ∆H for this process. ------------- I can solve for ∆H: n

    asked by chemstudent on February 5, 2009
  16. U.S History

    Which factor, self-interest or idealism, was more important in driving American foreign policy in the years 1895-1920? Thanks for the info :)

    asked by Jimmy on February 26, 2009
  17. math

    he said to his sister, he siad to his brother. What did the witty raindrop exclaim to all the others?

    asked by breanna on February 19, 2009
  18. Chemistry

    I'm going over some post-laboratory questions for Conductivity of Solutions. One of the questions is... From your measurements, what can you say about a) the presence of ionic impurities in tap water? b) the presence of molecular impurities in tap water? I

    asked by Jake on February 18, 2009
  19. science

    Locate the James, Roanoke, and savannah rivers. In what topographical feature do these rivers roiginate?

    asked by Anonymous on February 9, 2009
  20. Physics

    I need help with this physics problem: A child slides down a playground slide; the coefficient of kinetic friction is uk=0.25, and angle that the slide makes with the horizontal is 28.0 degree. She begins from rest and slides through a vertical height of

    asked by Amy on February 25, 2009
  21. accounting

    What would you pay for a $50,000 debenture bond that matures in 15 years and pays $5,000 a year in interest if you wanted to earn a yield of: (Round computations to 2 decimal places and use the rounded amounts to calculate the final answer. Round the final

    asked by joe on February 23, 2009
  22. physics

    A 0.10 kg piece of copper at an initial temperature of 95degC is dropped into 0.20 kg of water contained in a 0.28 kg aluminum calorimeter. The water and calorimeter are initially at 15degC. What is the final temperature of the system when it reaches

    asked by y912f on February 18, 2009
  23. statistics

    Fast Auto Service provides oil and lube service for cars. It is known that the mean time taken for oil and lube service at this garage is 15 minutes per car and the standard deviation is 2.4 minutes. The management wants to promote the business by

    asked by Karinna on February 14, 2009
  24. chem

    Arrange the following amines in order of decreasing base strength. NH3, NH2Br, CH3NH2, (CH3)2NH

    asked by help!!! on February 16, 2009
  25. Physics

    How is Snell's law being used in real life application?

    asked by Lena on February 9, 2009
  26. Spanish

    Tell what the following people have to do in order to get good grades. Write complete sentences. modelo: Jorge/tomar apuntes (siempre) Jorge siempre tiene que tomar apuntes. 1. María Elena y Nor/estudiar (mucho) María elena y Nora tienen que estudiar

    asked by Larry on February 18, 2009
  27. last calc question, i promise!

    given the curve x + xy + 2y^2 = 6... a. find an expression for the slope of the curve. i got (-1-y)/(x + 4y) as my answer. b. write an equation for the line tangent to the curve at the point (2,1). i got y = (-1/3)x + (5/3). but i didn't any answer for c!

    asked by jane on February 20, 2009
  28. chemistry

    Hydrogen cyanide is produced industrially from the reaction of gaseous ammonia, oxygen, and methane. 2 NH3(g) + 3 O2(g) + 2 CH4(g) 2 HCN(g) + 6 H2O(g) If 5.00 x 10^3 kg each of NH3, O2, and CH4 are reacted, what mass of HCN and of H2O will be produced,

    asked by lyne on February 1, 2009
  29. physics

    a remote controlled car's wheel accelerates at 22.4 rad/s^2. if the wheel begins with an angular speed of 10.8 rad/s what is the wheel's angular speed after exactly 3 full turns?

    asked by luke on February 12, 2009
  30. Chemistry

    Given the two reactions 1.PbCl2 Pb^2+ + 2 Cl^-, K1= 1.82×10^−10 2. AgCl Ag^+ + Cl^-, K2 = 1.15×10−4 what is the equilibrium constant Kfinal for the following reaction? PbCl2+ 2 Ag^+ 2AgCl+ Pb^2+ This is what i have soo far: PbCl2Pb2+ + 2Cl- K1=

    asked by Saira on February 5, 2009
  31. science...URGENT

    How are well developed soils similar to young soils? How are they different? Please help... i don't knoiw anything about it. pleae don't ask me to refer to my book... i don't have it with me...i googled it but i don't get any specific answer....plz help

    asked by Anonymous on February 2, 2009
  32. Physics

    Light that is polarized along the vertical direction is incident on a sheet of polarizing material. Only 94% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. No light passes through the second sheet.

    asked by Delli on February 15, 2009
  33. Chemistry

    For each of the following unbalanced equations, suppose that exactly 15.0g of each reactant is taken. Determine which reactant is limiting, and calculate what mass of each product is expected. assume the limiting reactant is completely consumed.

    asked by Megan on February 16, 2009
  34. Spanish #2

    Para sacar una buena nota en el examen...Look at the drawings and write two complete sentences about what the following people have to do. 1. There is a boy reading and he is sitting on a puffy cushion. I wrote: El chico tiene que leer. Él tiene que

    asked by Larry on February 18, 2009
  35. chemistry

    A current of 0.965 A is passed through 500 ml of 0.2 M solution of ZnSO4 for 10 min. The molarity of Zn2+ after deposition of Zn is 1. 0.1M 2. 0.5M 3. 0.8M 4. 0.194M

    asked by hriday on February 19, 2009
  36. chemistry

    0.10 M methylamine (CH3NH2) kb= 4.38e-4 calc the percent ionization so i did the ICE table to find that x=6.26e-3 and then i divided by .1 and then multiplied by 100. but i got the wrong answer whats did i do wrong?

    asked by Spencer on February 14, 2009
  37. science

    Locate the rivers in Central Nevada. Why are these rivers not part of a larger river system?

    asked by Anonymous on February 9, 2009
  38. physics

    please tell me if this is done correctly Find the final equlibirum temperature when 10.0 g of milk at 10.0 degrees C is added to 1.60 * 10^2 g of coffee with a temperature of 90.0 degrees C. Assume the specific heats of coffee and milk are the same as for

    asked by y912f on February 23, 2009
  39. algebra I

    what where the headlines after a mad scientist trained two eggs to attack a candy store with sharp sticks Pg 161-162

    asked by Mimi <3 on February 18, 2009
  40. physics

    You are designing a hydraulic lift for an automobile garage. It will consist of two oil-filled cylindrical pipes of different diameters. A worker pushes down on a piston at one end, raising the car on a platform at the other end. To handle a full range of

    asked by kate on February 23, 2009
  41. english

    can someone help me with this question?At several points in Sherman Alexie's "Indian Education" essay, Alexie uses comparison and contrast. Locate at least two examples and explain what each contributes to the essay? I just don't see a point of comparison

    asked by kayla on February 7, 2009
  42. Spanish

    Can someone please check my work? Answer the following questions in complete sentences. 1. ¿Adónde vas los lunes a las 8:30 de la mañana? Yo voy a la clase de historia los lunes a las ocho y media de la mañana. 2. ¿Adónde vas los lunes a las 3:30 de

    asked by Larry on February 26, 2009
  43. College Math

    A bucket contains orange tennis balls and yellow tennis balls from which 5 balls are selected at random, but assume that the bucket contains 7 orange balls and 6 yellow balls. (1) What is the probability that, of the 5 balls selected at random, at least

    asked by Sigmund on February 28, 2009
  44. college math - biostatistics

    hey... first time user and really lost. wondering if someone can help: Based on data from the Statistical Abstract of the United States, 112th Edition, only about 14% of senior citizens (65 years old or older) get the flu each year. However, about 24% of

    asked by will on February 18, 2009
  45. Physics

    A box slides down a 30.0 degree ramp with an acceleration of 1.20 m/s^s Determine the coefficent of kinetic friction between the box and the ramp How on earth do I do this with only this amount of information???

    asked by Physics on February 3, 2009
  46. Spanish

    Can someone please check my work? Write questions about Guillermo and his friends. Follow the model. modelo: guillermo está en la oficina. ¿Está Guillermo en la oficina? 1. Jorge está en el pasillo. ¿Está Jorge en el pasillo? 2. Luisa está muy

    asked by Larry on February 26, 2009
  47. chem

    Methyl violet is an indicator that changes color over a range from pH=0 to pH=1.6. What is the Ka of methyl violet?

    asked by che, on February 28, 2009
  48. Please Help Fast

    A student placed 10.5g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mL mark on the neck of the flask was reached. The flask was then shaken until

    asked by anonymous on February 12, 2009
  49. Spanish

    Can someone please check my work? These students are at school. Put the senence in the correct order using the correct form of the verb ir. 1. Sandra y Pablo/gimnasio (ir) Sandra y Pablo van al gimnasio. 2. yo/todos los dís/a la escuela (ir) Yo estoy a la

    asked by Larry on February 27, 2009
  50. Chem

    Determine the energy required to remove the electron from the 1s orbital of a Helium ion (He+).

    asked by Ashley on February 9, 2009
  51. Physics

    calculate the following, expressing the answer in scientific notation with the correct number of significan figures: (8.86 + 1.0 * 10^-3) / 3.610 *10^-3 2454.57?

    asked by y912f on February 15, 2009
  52. Chem

    Some very effective rocket fuels are composed of lightweight liquids. The fuel composed of dimethylhydrazine (CH3)2N2H2 mixed with dinitrogen tetroxide was used to power the Lunar Lander in its missions to the moon. The two components react according to

    asked by Samantha on February 24, 2009
  53. Physics

    please check these answers for me When an object is moving with uniform circular motion, the centripetal acceleration of the object a. is circular b. is perpendicular to the plane of motion c. is zero d. is directed toward the center of motion D What is

    asked by teamjakeward on February 15, 2009
  54. math

    what multiplication fact can you double to find 4X7?

    asked by Carol on February 25, 2009
  55. science

    Identify 3 rivers for which mississippi river is the base level.

    asked by Anonymous on February 9, 2009
  56. chemistry

    I am confused on how to even start this problem... A ground state H atom absorbs a photon of wavelength 94.91 nm, and its electron attains a higher energy level. The atom then emits two photons: one of wavelength 1281 nm to reach an intermediate level, and

    asked by Candace on February 8, 2009
  57. algebra with pizzzaz worksheet

    does anyone know why do girls like guys who wear shirts with eight buttons? I have tried all of the problems two times each and still cannot make any sense of it. thanks!

    asked by jackie on February 3, 2009
  58. Finite Math

    A producer wants to put on a variety show on television. Assume that the producer has 9 skits and 6 commercials available. In how many ways can the producer create a television show? We assume that a skit is never repeated, but (unfortunately) commercials

    asked by Rory on February 17, 2009
  59. Spanish

    Can someone please check my work. Write four sentences describing what you do after school. Después de la escuela, soy miro la televisión. Después de, soy tener que hacer la tarea y estudio. También soy uso la computadora y escucho música. Por

    asked by Larry on February 22, 2009
  60. Poem/Daybreak in Alabama

    In Hughe's Poem whichof the following things is not something the composer says he is going to put into his music? a. tall trees b. swamp mist c. the smell of red clay after rain d. the scent of pine needles B to what does Hughes compare the color of

    asked by Bella on February 17, 2009
  61. chemistry

    Calculate the mass of the solid you must measure out to prepare 100 mL of 0.025 M CuSO4. Note that this salt is a hydrate, so its formula is CuSO4⋅5H2O. You must include the waters of hydration when calculating the formula weights. Would the following

    asked by Jake on February 11, 2009
  62. Thermodynamics

    What is the temperature of a two-level system of energy separation equivalent to 300 cm^−1 when the population of the upper state is one-half that of the lower state? What does this "energy separation equivalent to 300 cm^−1" mean? I can get this far:

    asked by chemstudent on February 23, 2009
  63. Chemistry

    Calculate the entropy change in the surroundings when 1.00 mol N2O4(g) is formed from 2.00 mol NO2(g) under standard conditions at 298 K. I get +192 J/K. The book says -192 J/K. Here is my work, where am I going wrong? Standard Enthalpy of NO2(g) = 33.18

    asked by chemstudent on February 21, 2009
  64. chemistry

    Potassium nitrate has a lattice energy of -163.8 kcal/mol and a heat of hydration of -155.5 kcal/mol. How much potassium nitrate has to dissolve in water to absorb 114 kj of heat?

    asked by reese on February 15, 2009
  65. Chemistry

    The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione, better known as luminol, is used by forensic scientists in analyzing crime scenes for the presence of washed-away blood. Luminol is so sensitive that it can detect blood that has been diluted 10,000

    asked by Danielle on February 11, 2009
  66. chemistryyy

    Germanium has a cubic unit cell with a side edge of 565pm. The density of germanium is 5.36g/cm^3. What is the crystal system adopted by germaium.

    asked by Anonymous on February 6, 2009
  67. Physics

    There are six books in a stack, and each book weighs 5 N. The coefficient of static friction between the books is 0.2. With what horizontal force must one push to start sliding the top 5 books off the bottom one. my answer is 3N but i don't think that's

    asked by Bella on February 20, 2009
  68. please revise my essay

    There are many reasons why a person should go to college, aside from receiving a college degree. Many people have their own personal beliefs about why a person should attend college but I will share my own views on why college is important. The reasons I

    asked by Jackson on February 10, 2009
  69. Spanish #1

    Can someone please check my work? Write questions about Guillermo and his friends. Follow the model. modelo: guillermo está en la oficina. ¿Está Guillermo en la oficina? 1. Jorge está en el pasillo. ¿Está Jorge en el pasillo? 2. Luisa está muy

    asked by Larry on February 26, 2009
  70. Chemistry

    Based on the balanced equation Al2S3 + 6H2O → 2Al(OH)3 + 3H2S calculate the number of excess reagent units remaining when 4 Al2S3 formula units and 30 H2O molecules react? Molar Mass (g/mol) Al2S3 150.16 H2O 18.015 Al(OH)3 75.361 H2S 34.082 Avogadro's

    asked by SIMON on February 20, 2009
  71. science

    what is the ionization of hclo3 in water

    asked by jamarr on February 20, 2009
  72. chemmm helppppppppp

    Consider the following reaction: 2N2O(g)--->2N2(g) + O2(g) a. express the rate of the reaction with respect to each of the reactants and products. b.In the first 10.0 s of the reaction, .018 mol of O2 is produced in a reaction vessel with a volume of

    asked by Natash on February 1, 2009
  73. math

    what did they call the duck who became a test pilot

    asked by Anonymous on February 27, 2009
  74. physics

    A force of 40.0N is required to pull a 10.0kg wooden block at a constant velocity across a smooth glass surface on Earth. What force would be required to pull the same wooden block across the same glass surface on the planet Jupiter.

    asked by Rena on February 22, 2009
  75. physics

    A potential energy function for a two-dimensional force is of the form U = 3 x2y - 6 x. Find the force that acts at the point (x, y). (Use x and y as appropriate.)

    asked by Jessi on February 24, 2009
  76. CHEM-vaporization

    A 50.0g piece of iron an 152°C is dropped into 20.0g H2O(l) at 89°C in an open, thermally insulated container. How much water would you expect to vaporize, assuming no water splashes out? The specific heats of iron and water are 0.45 and 4.21

    asked by - on February 6, 2009
  77. Math

    when 3g^2-4g+2 is subtracted from 7g^2+5g-1, what is the difference?

    asked by Angie on February 28, 2009
  78. chemistry

    Precipitation Reactions Write a molecular equation for the precipitation reaction that occurs (if any) when the following solutions are mixed. If no reaction occurs, write NO REACTION. Express your answer as a chemical equation. Identify all of the phases

    asked by Jake on February 9, 2009
  79. chemistry

    Lead metal is added to 0.100M Cr3+(aq) Pb(s) + 2Cr3+(aq) -> Pb2+(aq) + Cr2+(aq) What is [Pb3+] when equilibrium is reached? What is [Cr2+] when equilibrium is reached? What is [Cr3+] when equilibrium is reached? i solved it buh for sum reason am not

    asked by help!!! on February 9, 2009
  80. math

    (a) Use the Midpoint Rule and the given data to estimate the value of the integral I. (Give the answer to two decimal places.) I = int_0^3.2 f(x)dx 1 x f(x) x f(x) 0.0 7.3 2.0 8.8 0.4 6.8 2.4 7.3 0.8 8.1 2.8 7.6 1.2 7.6 3.2 7.3 1.6 8.2 (b) If it is known

    asked by josh on February 3, 2009
  81. Ionic Crystal Structures

    Calculate the density of CsCl. Use 169pm as the radius of Cs+. rCs+= 169pm length= 2*169= 338pm= 3.38*10^-8 v= l^3= (3.38*10^-8)^3 = 3.86*10^-23 m= 2* 168.36 g/mol / 6.022*10^23 = 5.59*10^-24g d= m/v d= 5.59*10^-24g/ 3.86*10^-23 d= 14.48 g/cm^3 BUT the

    asked by -- on February 6, 2009
  82. chemistry

    A student prepared aspirin (C9H8O4) in a laboratory experiment using the following reaction. C7H6O3 + C4H6O3 C9H8O4 + HC2H3O2 The student reacted 2.00 g salicylic acid (C7H6O3) with 2.67 g acetic anhydride (C4H6O3). The yield was 2.00 g aspirin. Calculate

    asked by lyne on February 4, 2009
  83. Chemistry

    Depict the hydrogen bonding between two ammonia molecules and between one ammonia molecule and one water molecule?

    asked by anonymous on February 9, 2009
  84. chemistry

    what are the symmetry elements for: cis-CoCl2(NH3)4 and trans-CoCl2(NH3)4 would it be C2 S2?

    asked by erin on February 25, 2009
  85. Ms. Sue - ACT Test

    I was wondering if you had any experiences with the english part of the ACT test. About 3 hours ago, I took a pratice test on the english part of it, and got like 20/35. That's like 57% right. I want to know how to tackle those sections where they have a

    asked by Chopsticks on February 22, 2009
  86. analogies

    What is the analogy for South America: Brazil :: North America:

    asked by Bob on February 2, 2009
  87. Chemistry

    C7H6O3(s) + C4H6O3(l) → C9H8O4(s) + HC2H3O2(l) is the equation. At 20 degree celsius, how many liters of acetic acid, HC2H3O2, would be formed? The density of acetic acid is 1.05g/cm3.

    asked by Emat on February 19, 2009
  88. chemical kinetics

    2H2O2 --->2H2O + O2 What is the instantaneous rate of formation of O2 at 50s? THeres a graph with the concentration of H2O2 as a function of time. at 50s the conc. is .2 But isnt this the concentration of H2O2, I don't understand. Also what is the

    asked by Natash on February 4, 2009
  89. Chemistry- please check my work

    Question: The following equilibrium was studied by analyzing the equilibrium mixture for the amount of HCL produced. LaCl3(s)+ H2O(g) goes to LaOCl(s)+2HCl(g). A vessel whose volume was 1.25L was filled with 0.0125 mol of lanthanum (III)chloride and 0.0250

    asked by eliz on February 25, 2009
  90. probability/stat

    A lottery draws n numbers, values 1-N , from a hopper that replaces the number after it is drawn, i.e. probability of each number appearing remains constant. At the end, the winning number is drawn from the same hopper. What is the probability that the

    asked by rose on February 7, 2009
  91. Organic Chemistry Please help!

    1. How could you distinguish between cyclohexane and cyclohexene using IR only?

    asked by ladi on February 18, 2009
  92. Science

    identify the bay, sound, or gulf that serves as base for a) the Sacramento and San Joaquin rivers b) the Alabama River system c) the Connecticut River system Thanks for your help!!!

    asked by ana on February 9, 2009
  93. Composite Materials

    Can someone please help with this problem? A burnout test was performed to determine the volume fractions of constituents in a glass/epoxy composite. The following observations were made: Weight of empty crucible = 47.6504 g Weight of the crucible and

    asked by Jim on February 26, 2009
  94. Chemistry

    At 25°C, K = 0.090 for the following reaction:H2O(g) + Cl2O(g) 2 HOCl(g) Calculate the concentrations of all species at equilibrium for each of the following cases. (a) 1.2 g H2O and 1.6 g Cl2O are mixed in a 1.4 L flask. (b) 1.2 mol pure HOCl is placed

    asked by Lindsey on February 15, 2009
  95. Physics

    Find the resultant of these two vectors: 2.00 * 10^2 units due east and 4.00 * 10^2 units 30.0degrees north of west. please SHOW me how to do this

    asked by y912f on February 5, 2009
  96. Chem

    A molecule of oxygen gas (O2) has a velocity of 2800 m/s. What is its de Broglie wavelength?

    asked by Ashley on February 9, 2009
  97. Organic Chemistry

    What product is expected from the reactino of fumaric acid (trans-2-butenedioic acid) with 1,3-butadiene?

    asked by Blair on February 27, 2009
  98. Chemistry

    is CH3CH2N or NO2 a lewis acid?

    asked by Anonymous on February 12, 2009
  99. ALGEBRA 2

    THERE ARE 6 PEOPLE IN A GARDENING CLUB. Each gardener orders seeds from a list of 11 different types of available seeds. What is the probability that at least 2 gardeners order the same type of seeds?

    asked by BETTY on February 24, 2009
  100. chemistry

    a 50.0 ml sample of water is heated to its boiling point. how much heat (in KJ) is required to vaporize it? (assume a density of 1.00g/ml).

    asked by reese on February 7, 2009