Questions Asked on
April 8, 2010

  1. chemistry

    What is the complete ionic equation for CaS(aq) +CuCl2(aq)=CuS(s)+CaCl2(aq)

    asked by lupe
  2. Chem

    Calculate delta H for the formation of one mole of N2O5 from the elements at 25 degrees C using the following data. 2H2 + O2 - 2H2O delta H = -571.6 kJ N2O5 + H2O - 2HNO3 deltaH = -73.7 kJ 1/2N2 + 3/2O2 + 1/2H2 - HNO3 delta H = -174.1 kJ

    asked by Anonymous
  3. CALCULUS

    A ruptured oil tanker causes a circular oil slick on the surface of the ocean. When its radius is 150 meters, the radius of the slick is expanding at 0.1 m/min, and its thickness is .02 m. At that moment: a. How fast is the area of the slick expanding? b.

    asked by MILEY
  4. chemistry

    what is the pressure exerted by a 0.500 mol sample of nitrogen in a 10.0 L container at 20 degrees C?

    asked by james
  5. college Chem

    A diver exhales a bubble with a volume of 250 mL at a pressure of 2.4 atm and a temperature of 15 °C. How many gas particles are in this bubble?

    asked by Russell
  6. PHYSICS

    A ball of mass m at rest at the coordinate origin exploded into three equal pieces. At a certain instant, one piece is on the x-axis at x=40cm, and another is at x=20cm, y= -60 cm. Where is the third piece at that instant.

    asked by Student
  7. chemistry

    what volume of oxygen gas is needed to completely combust 0.202 L of butane (C4H10) gas?

    asked by mary
  8. government

    Constitutional scholars have pointed out there is an inconsistency in Justice Marshall's opinion with respect to what the constitution specifically provides. What is that inconsistency?

    asked by susie
  9. math Please help me with part b

    The average cost per item, C, in dollars, of manufacturing a quantity q of cell phones is given by C= (a/q) + b where a and b are positive constants a.Find the rate of change of C as q increases. What are its units? b. Currently, 5000 phones are being made

    asked by joelle
  10. Chemistry

    "Given that the bond enthalpy of the carbon-oxygen bonds in carbon monoxide and carbon dioxide are 1073 kJ/mol and 743 kJ/mol respectively, and that of the bond in the oxygen molecule is 496 kJ/mol, calculate the enthalpy change for the combustion of 1

    asked by Stuck
  11. Math

    With time, t, in minutes, the temperature, H, in degrees Celsius, of a bottle of water put in the refrigerator at time t=o is given by H = 4 + 16e-.02t How fast is the water cooling initially? After 10 minutes? Include units in your answer

    asked by piper
  12. Chemistry

    A reaction of 1 L of chlorine gas (Cl2) with 3 liters of fluorine gas (F2) yields 2 liters of a gaseous product. All gas volumes are at the same temperature and pressure. What is the formula of the gaseous product? So it would look roughly like this? Cl2 +

    asked by Anonymous
  13. Physics

    An unstable high-energy particle enters a detector and leaves a track 1.35 mm long before it decays. Its speed relative to the detector was 0.992c. What was its proper lifetime? That is, how long would the particle have lasted before decay had it been at

    asked by Hercules
  14. Physics

    Two Q = +6.72 mC charges are placed at opposite corners of a square d = 1.5 m on each side, and -Q = -6.72 mC charges are placed at the remaining corners, as shown in the figure. Q___________-Q | | | | | | | | -Q__________Q

    asked by DJ
  15. chem

    A metal oxide reacts with water to produce a metal hydroxide. What additional information would you need to determine the percent yield of metal hydroxide from this reaction?

    asked by Marc
  16. CALCULUS

    A gas station stands at the intersection of a north-south road and an east-west road. A police car is traveling towards the gas station from the east, chasing a stolen truck which is traveling north away from the gas station. The speed of the police car is

    asked by MILEY
  17. chemistry

    Excess florine, F2(g) reacts at 150 degrees celius with bromine, Br2(g) to give the compound BrF(n). If 423 mL of Br2 at 150 Degrees and 748mmHg produced $.20 g BrF(n), what is it? describe the bonding in the molecule, using valence bond theory.

    asked by Emily
  18. Chemistry

    Determine the mass of gold that can be extracted if 25.0g of sodium cyanide is used. 4Au+8NaCN+O2--->4NaAu(CN)2+4NaOH

    asked by Lauren:)
  19. Chemistry

    how much heat is required to vaporize 343 g of liquid ethanol at its boiling point?

    asked by Anonymous
  20. chemistry

    How many grams of oxygen are required to react with 0.128 lead(II) sulfide?

    asked by jeff
  21. econimics

    Why might price collusion occur in oligopolistic industries? Assess the economic desirability of collusive pricing. What the main obstacles to collusion? Speculate as to why price leadership is legal in the United States, whereas price fixing is not.

    asked by Erick
  22. Chemistry

    Identify the balanced net ionic equation for the reaction 2Na3PO4(aq) + 3CaCl2(aq)¨ 6NaCl(aq) + Ca3(PO4)2(s)

    asked by Dan
  23. economics

    . If the government wanted to encourage a monopoly to produce the socially efficient quantity, should it use a per-unit tax or a per-unit subsidy? Explain how this tax or subsidy would achieve the socially efficient level or output. Among the various

    asked by Kim
  24. Science-Periodic Table

    starting from carbon what occurs to the ion charge as u move it to right? In my periodic table Carbon does not have a charge at all; there is just a dash in place of where a charge should be, I'm not really sure what that means. starting from carbon, what

    asked by Sara
  25. Technology

    23. List two examples of tools used in each of these major areas of processing: material, energy, and information processing. I'm stuck! :(

    asked by y912f
  26. chem101

    will the following reaction take place nh3+h2o= nh2 + h3o

    asked by wendy
  27. MATH

    It is a well-known fact that homing pigeons fly faster over land than over water. Assume that they fly at 10 metres per second over land, and only 8 metres per second over water. A pigeon is located at the edge of a straight river bank, 500 metres wide,

    asked by EMILY
  28. statistics

    the ages of five randomly chosen cars in a parking garage are determined to ,be and , years old. if we consider this sample of in groups of , how many groups can be formed?

    asked by Anonymous
  29. Math

    Graph the inequality on a plane. y>5x. I think that it should be a dashed line that should be a horizontal line but I'm not totally sure. Could you please help me with this graph? Thanks.

    asked by B.B.
  30. Chemistry

    The half-life for radioactive decay of 14C is 5730 years (it emits β-particles with energy of 0.16 MeV). An archaeological sample contained wood that had only 72% of the 14C found in living trees. What is its age?

    asked by Zoa
  31. Chem

    How many lone pairs of electrons are on the central atom in the water molecule

    asked by Lynn
  32. College Mathematics

    A survey of 300 parks showed the following 15 had only camping 20 had only hiking trails 35 had only picnicking 185 had camping 140 had camping and hiking trails 125 had camping and picnicking 210 had hiking trails Find the number of parks that: Did not

    asked by Michele
  33. Chem

    calculate the amount of heat involved in the conversion of 25.00 g of water at 100 *C to steam at 100 *C. ( delta H vaporization = 40.7 kJ/mol)

    asked by Anonymous
  34. math

    list the possible valures of sin a if a is a quadrental angle

    asked by Anonymous
  35. calculus

    Sketch the region enclosed by x+y^2=42 and x+y=0. Decide whether to integrate with respect to x or y, and then find the area of the region.

    asked by lssa
  36. math/probability

    find the number of possible choices when you choose one item from each category. 1. 3 hats, 7 shirts, 13 scarves 2. 6 pens, 2 nbk 3. 4 cars, 2 colors i don't get the question

    asked by Jane
  37. Chemistry

    A solution is prepared by mixing 13.00 ml of .0021 M aqueous Hg2(NO3)2 with 25 ml of .015M HCL. Assme that volumes are additive. a) Will precipitation occur? b) Calculate [HG2 2+], [CL-], and [NO3] after equilibrium is established.

    asked by Anmol
  38. science

    does everything you see fit the definition of matter? can you see all kinds of matter? how can helium take up space?

    asked by jeremias
  39. economics

    How does monopolistic competition differ from pure competition in its basic characteristics? From pure monopoly? Explain fully what product differentiation may involve. Explain how the entry of firms into its industry affects the demand curve facing a

    asked by Erick
  40. Algebra 2

    16x^2+16y^2-16x+24y-3=0 How do I solve this?

    asked by Soto
  41. Chemistry

    How many moles of NaBH4 are needed to generate one mole of B2H6 if the reaction gives an 80% yield? 3NaBH4 +4BF3 ¨ 3NaBF4 + 2B2H6

    asked by Dan
  42. Calculus

    How would I solve this: -A particle moves along a line so that, at time t, its position is s(t)=8 sin2t. a) For what values of t does the particle change direction? b) What is the particle's maximum velocity?

    asked by Terry
  43. physics help

    A flywheel turns through 32 rev as it slows from an angular speed of 2.1 rad/s to a stop. How much time is required for it to complete the first 16 of the 32 revolutions?

    asked by stanely
  44. math please help

    A ruptured oil tanker causes a circular oil slick on the surface of the ocean. When its radius is 150 meters, the radius of the slick is expanding at 0.1 m/min, and its thickness is .02 m. At that moment: a. How fast is the area of the slick expanding? b.

    asked by joelle
  45. Physics

    In one model of the hydrogen atom, the electron revolves in a circular orbit around the proton with a speed of 2.9x10^6 m/s. Determine the radius of the electron's orbit.

    asked by Anonymous
  46. Physics

    In order to keep a leaking ship from sinking, it is necessary to pump 15.0 {\rm lb} of water each second from below deck up a height of 2.00 {\rm m} and over the side.What is the minimum horsepower motor that can be used to save the ship? What is the

    asked by Physics
  47. classroom management

    Write a one-sentence goal for each of the seven assumptions that will support a productive and positive learning atmosphere. Your goals should focus on how you can achieve the demands of each assumption. Here are the seven assumptions. 1. Successful

    asked by scooby
  48. economics

    Why is there so much advertising in monopolistic competition and oligopoly? How does such advertising help consumers and promote efficiency? Why might it be excessive at times?

    asked by Erick
  49. Pre-Cal

    A piece of charcoal of mass 35g is found in the ruins of an ancient city. The sample shows a carbon-14 activity or R(t)=4.167 decays/sec. Convert the decay constant of ^14C from (1)(a)in terms of seconds instead of yrs. Find the number of atoms N(t)using

    asked by Moe
  50. Chemisty

    In an experiment, 23.0 g of ice at –25°C is converted into steam with a temperature of 124°C. How much heat is required for the process? The following data may be of use: vap = 2260 J/g; Hfus = 334 J/g; Cp(ice) = 2.06 J/g • °C; Cp(water) =

    asked by Stephen
  51. econmics

    Why do oligarchy exist? List five or six oligopolists whose products you own or regularly purchase. What distinguishes oilgopoly from monopolistic competition?

    asked by Erick
  52. economics

    What firm dominates the U.S. beer industry? What demand and supply factors have contributed to "fewness" in this industry?

    asked by Erick
  53. Algebra

    In 1994 the life expectancy of males in a certain country was 61.6 years. In 1999, it was 63.8 years. Let E? represent the life expectancy in year t and let t represent the number of years since 1994. 1) The linear function E(t) that fits the data is:

    asked by Mary
  54. chemistry

    What is the pH of a solution prepared by dissolving 8.40 g of aniline hydrochloride C6H5NH3Cl in 750 mL of 0.210 M aniline,C6H5NH2? i kno to use the ph = pka + log (base/acid). getting pka isnt the issue, but what do i put into the log (base/acid)?

    asked by anonymous
  55. Science-Periodic Table

    whats the connection/relationship between the # of protons in the nucleus of an atom & and atomic # of the element? The atomic number tells you the number of protons in the nucleus of the atom. The atomic number is the number of protons in the nucleus of

    asked by Sara
  56. Anatatomy and Physiology

    The ability of a specific tissue or organ to respond to the presence of a hormone is dependent on:

    asked by Joe
  57. Physics

    Four equal charges Q=2*10^-8coulumb are placed at the corners of a square of side 60cm.calculate the potential at the centre of the square.

    asked by Ayodele
  58. Chemistry

    Is Zn+2 diamagnetic or paramagnetic? I am a little confused on how to figure this out and I'm finding inconsistent answers when I tried to look this up. Thanks!

    asked by Trixie
  59. Chemistry

    Given the enthalpies of formation for the following substances, determine ƒ´Hrxn for Cl2(g) + C2H2Cl2(g) „_ C2H2Cl4(g) Substance ƒ´H (kJ/mol) Cl2 0 C2H2Cl2 4.27 C2H2Cl4 ¡V155.6

    asked by Stephen
  60. Earth science

    what is the material between 2900 kilometers and 5200 kilometers below earths surface inferred to be

    asked by smiley
  61. Acc

    The comparative statements of Dillon Company are presented below. Analysis DILLON COMPANY Balance Sheets December 31 Assets 2009 2008 Current assets Cash $ 21,000 $ 18,000 Short-term investments 18,000 15,000 Accounts receivable (net) 86,000 74,000

    asked by Anonymous
  62. chemistry

    how do we calculate bond order of a molecule that has 3 different elements, like for example C-N-O

    asked by phys
  63. math

    The average cost per item, C, in dollars, of manufacturing a quantity q of cell phones is given by C= (a/q) + b where a and b are positive constants a.Find the rate of change of C as q increases. What are its units? b. Currently, 5000 phones are being made

    asked by piper
  64. accounting

    The partners in New Yorker Company decide to liquidate the firm when the balance sheet shows the following. NEW YORKER COMPANY Balance Sheet May 31, 2010 Assets Liabilities and Owners' Equity Cash $27,700 Notes payable $13,140 Accounts receivable 24,790

    asked by mayasa
  65. math

    how to find the period of y = cos(6x)from your graph. what is the period of y=cos(6x) in radians?

    asked by subash
  66. english

    for the word mustang.... which syllable is accented.... first or second

    asked by maco
  67. chemistry

    I was having trouble with this problem. initial pressure for the compounds involved in the reaction displayed were determined to be P(CO(g)) = 0.5794 atm, P(H2O(g)) = 0.5662 atm, P(CO2(g)) = 0.7950 atm, P(H2(g)) = 0.2754 atm. Calculate the value of the

    asked by andy
  68. physics

    A student proposes to measure the gravitational constant G by suspending two spherical objects from the ceiling of a tall cathedral and measuring the deflection of the cables from the vertical. Draw a free-body diagram of one of the objects. (Do this on

    asked by phys
  69. calculus

    Sketch the region in the first quadrant enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. y=10cosx, y=10sin2x,x=0

    asked by lssa
  70. chemistry(check my answer)

    how do resonance structure related to its real structure? resonance structure is just another way to write the lewis dot with different formal charges and bond order

    asked by phys
  71. Geography

    52. Do you think that the British influence in India was positive or negative? Explain your answer. 52. Even though the British rule on India benefited it in a few ways, I believe that the British influence in India was more negative than it was positive.

    asked by y912f
  72. chemistry

    I also had a problem with this type of questionthe initial pressure of NOCl(g) is 4.329 atm, calculate the % of NOCl(g) left over after the reaction reaches equilibrium according to the balanced equation. The value of Kp at 400.0 °C is 1.99. The initial

    asked by andy
  73. Math

    Write a brief scenario that can modeled with a linear equation. AND Summarize a situation modeled by a quadratic equation. I am completly lost with these two questions. I understand the difference between these two functins but don't know how to come up

    asked by Carrie
  74. Science-Periodic Table

    describe how to verify the # of electrons in the ion of an element. Can you please correct some of my wordings in here. I don't really get how to explain it. You look at the atomic number which is the same number of protons as electrons; but if there is a

    asked by Sara
  75. Physics

    A radio station broadcasting on a frequency of 106 MHz is received by an astronaut headed toward the station at a speed 4.0×107 m/s. To what frequency must the astronaut's radio be tuned?( use MHz for final unit answers)

    asked by Archillis
  76. chemistry

    I have a chemistry project where I need to make an object move using my knowledge of chemistry. The object os a small ball the size of a large marble. It must be moved using chemistry and NOT physics (ie slope wind etc). I am 15 and in grade 11.

    asked by Didier
  77. Physics

    A spherical steel ball has a diameter of 2.540cm at 25 degree Celsius. (a)What is its diameter when the temperature is raised to 100 degree Celsius? (b)What temperature change is required to increase its volume by 1%?

    asked by Vanessa
  78. chemistry

    At room temperature the equilibrium constant Kc for the reaction: 2NO(g)=N2(g)+O2(g) is 1.4x10^30. In the atmosphere at room temp. the concentration of nitrogen gas is 0.33 mol/L and the concentration of oxygen gas is about 25% that value. Calculate the

    asked by curtis
  79. Chemistry

    What will be the final temperature of a 22.0 g piece of iron (Cp = 25.09 J/K • mol), initially at 25°C, if it is supplied with 28.2 J from a stove?

    asked by Stephen
  80. Chemistry

    How many moles of PCl3 can form from a mixture of 5 mol of P and 6 mol of Cl2 according to the equation 2P + 3Cl2 ¨ 2PCl3

    asked by Dan
  81. Chemistry

    What colors would you expect to see in a flame for the following compounds: potassium chloride, potassium nitrate, and potassium sulfate. Explain your answer

    asked by Sarah
  82. 12th grade

    The radioactive isotope of Carcon (^14C)has a half life of 5730. What is the decay constant of ^14C? If we start with a sample of 1000 carcon nuclei, how many will be left in 22920 years time?

    asked by Moe
  83. English

    What does the green light symbolize in the Great Gatsby when Gatsby vanishes in chapter 1?

    asked by Kathleen
  84. Pre-Cal

    The radioactive isotope of Carcon (^14C)has a half life of 5730. What is the decay constant of ^14C? If we start with a sample of 1000 carcon nuclei, how many will be left in 22920 years time?

    asked by Moe
  85. geography / 8 grade

    I am looking for Japan Now. Ethnicity, languages, religion, education,male/female roles and expectations,type of gvt.,foreign aid,and financial status. I need any magazine or newspapers sources can you help me find these information please.

    asked by marie
  86. 3rd grade

    how do I figure out 3/5 of 15?

    asked by Darius
  87. Chemisty

    In an experiment, 230 kJ of heat energy are released to the surroundings when steam is converted to liquid water. Calculate the number of grams of water condensed. The following data may be of use: vap = 2260 J/g; Hfus = 334 J/g; Cp(ice) = 2.06

    asked by Stephen
  88. Chemistry

    Alum is a hydrated compound containing 45.5% water. How many moles of water are contained in one mole of this hydrate. Data for alum M= 474 g∙mol-1

    asked by Dan
  89. Physics

    Can a person, in principle, travel from Earth to the galactic center (which is about 2.30×104 lightyears distant) in a normal lifetime? Explain, using either time-dilation or length contraction arguments. If they want to make the trip in 26 y what

    asked by Leonidas
  90. 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
  91. Economics

    The nation experiences a major hurricane that destroys significant capital stock. Policymakers in the federal government reason that the destruction caused by the hurricane will reduce national income and that this should be counteracted through an

    asked by Nicole
  92. Accounting

    I know that you cannot answer homework questions directly, but in my accounting class we have to do a financial statement for Arcadia Hospital which is our checkpoint for Axia College of University of Phoenix. I did see previous question hoping to get more

    asked by ADA
  93. physics

    Pls help me out. Four positive and equal charges are located dt the corners of a square of side 20cm.if each charge has a magnitude 2microcoulumb,calculate the force acting on the charge at the lower left corner of the square.

    asked by Ayodele
  94. social studies

    i am asked to plan a port town like William Penn did however, I am not sure how the original layout of such a town may have looked like? Where can I see an actual early town plan(1700's)that might have been located near river?

    asked by hugh
  95. Physics

    A spherical steel ball has a diameter of 2.540cm at 25 degree Celsius. (a)What is its diameter when the temperature is raised to 100 degree Celsius? (b)What temperature change is required to increase its volume by 1%?

    asked by Vanessa
  96. geography

    The factor that is forcing many South Asians to move to cities is a. religious conflict in rural areas. b. the threat of landslides in coastal areas. c. lack of arable land due to a growing population. d. dry conditions in the Indo-Gangetic Plain C?

    asked by Maggie
  97. Chemistry

    Given the reaction shown below, calculate: (a) The amount of NO2, in grams, generated from reactants if 300.23 kJ of heat energy is released during the course of the reacton. (b) The heat energy released if 33.23 grams of O2 is consumed in the reaction. 2

    asked by Stephen
  98. Business Law

    What is one way the U.S. legal system impacts U.S. businesses

    asked by Tennyson
  99. 9th grade science

    what is the loudness of sound called?

    asked by Lisa Camp
  100. english

    How should start my comapre & contrast essay on Mariah Carey & Whitney Houston? like can I get an example of an attention getter?

    asked by tash
  101. Undamped, forced oscillation

    Undamped, forced oscillation?!?!? I have this question and can't seem to get the right answer. Damping is negligible for a 0.130 kg object hanging from a light 6.30 N/m spring. A sinusoidal force with an amplitude of 1.70 N drives the system. At what

    asked by bre
  102. calculus

    Show that the curves (y= √2sinx) and (y=√2cosx) intersect at right angles at a certain point with 0

    asked by Imad
  103. science

    Ions are electrically charged particles that are formed when certain compounds are dissolved in water. These solutions will conduct electricity. The Swedish scientist Svante Arrhenius coined the term ion (which means wanderer) to explain why solutions of

    asked by courtney
  104. 1st grade math

    find 4 ways to show 25 cents..

    asked by lee
  105. web design

    Final Project: Web Site Analysis · Analyze the Web site you selected for the Capstone Discussion question. · Use on your knowledge gained from the past 9 weeks. · Evaluate the current design of the site. · Identify recommendations for redesign. ·

    asked by mary
  106. chemistry

    can you tell me what i did wrong on this problem Rigid rods of negligible mass lying along the y axis connect three particles. The system rotates about the x axis with an angular speed of 3.30 rad/s. 4kg,y=3.00m 2kg,y=-2.00m 3kg,y=-4.00m a)Find the total

    asked by phys
  107. math

    Imagine a small chess board, 3 x 3. If you place a knight on the top left hand corner, how many different squares can the knight reach in less than 4 moves?

    asked by Sandy
  108. chemistry

    I keep getting the wrong answer for this one can someone help. The initial concentration for the compounds involved in the reaction displayed were determined to be [NOCl(g)] = 0.1738 mol/L, [NO(g)] = 0.1991 mol/L, [Cl2(g)] = 0.000005938 mol/L. Calculate

    asked by andy
  109. geometry

    the lengths of the sides of a triangle are y,y+1, and 7 centimeters. if the perimeter is 56 centimeters, what is the value of y?

    asked by Anonymous
  110. geometry

    the lengths of the sides of a triangle are y,y+1, and 7 centimeters. if the perimeter is 56 centimeters, what is the value of y?

    asked by Anonymous
  111. Physics

    A charge q=3*10^-6coulumb is placed at the centre of a cube of edge L.Determine the electric flux through each of the cube faces.

    asked by Ayodele
  112. ECONOMICS

    As the economy expands, it requires les and less investment.

    asked by Paul
  113. Chem 106

    Calculate the grams of HNO3 in 35.0 ml of a 6.00 M HNO3 solution

    asked by jessica
  114. Science, gr9

    Hi, I have to write an opinionated article on the safety problems in space. I have to wrtie the issues that occur during a lift-off which are ignored I have been unable to find a website that tells me issues that occur but are ignored or thought that

    asked by Fresh
  115. calculus

    Find the equation of the following. The locus of all points in a plane such that the sum of the distances from points (-2,-1) and (-10,-1) is equal to 6.

    asked by Jamie
  116. Algebra 2

    The sequence a is defined recursively by: a_1 = 6, and a_(i+1) = a_i + 8 for all i >= 1. Then a_5 = Choose one answer. a. 38 b. 22 c. 30 d. 46 I chose a. Is that right?

    asked by Gianna
  117. math

    There are five math teachers at Nate Elementary. The ages of four of the teachers are 32, 26, 35, and 27. If the mean of the ages is 31, what is the mode?

    asked by Anonymous
  118. math

    austin invests 4500 with first national bank at 5 1/4% simple interest. how much interest does austin earn after one year?

    asked by michele
  119. business

    what are the importance of business math to the business education students?

    asked by Zaharaddeen
  120. math 12

    The mean and standard deviation of a set of data are two measurments that describe the data. A certain student has written 8 out of 10 unit exams, which are equally weighted. The student misses the ninth exam and receives a score of 0. However, for the

    asked by Leigh
  121. chemistry

    I was having trouble with this problem. initial pressure for the compounds involved in the reaction displayed were determined to be P(CO(g)) = 0.5794 atm, P(H2O(g)) = 0.5662 atm, P(CO2(g)) = 0.7950 atm, P(H2(g)) = 0.2754 atm. Calculate the value of the

    asked by andy
  122. Biology Research Paper

    I need to make my conclusion bigger; how can I do that? What more information can I add in it? Thanks Burning of fossil fuels is considered to be the largest contributing factor to the release of greenhouse gases in the atmosphere. There are many types of

    asked by mysterychicken
  123. chemistry

    Use the combined gas law to solve the following problem: Calculate the volume of helium gas that results when 0.550 L of the gas is heated from 22.0 degrees C at 1.00 atm to 30.0 degrees C at 1.50 atm .

    asked by Anonymous
  124. Chemistry

    How can you tell if [ MnCl6]4- or [ Mn(CN)6 ] 4- has the longer wavelength of light? and then how do you figure out how many unpaired electrons each has?

    asked by Trixie
  125. Chemistry

    Combustion analysis of 0.284 g of a compound containing C, H, and O produces 0.623 g of CO2 and 0.340 g of H2O. Mass spectral analysis shows that the compound has a molar mass around 120 g mol-1. What is the compound's: Empirical Formula: Molecular

    asked by Darali
  126. psychology

    What is the name of the type of thinking that humans do naturally? What is the weakness of this type of thinking?

    asked by Komal
  127. math

    I need a sketch and label of a figure that has an area of 47 sq. cm.

    asked by mariah
  128. math

    Hi, for the question, "the sum of two numbers is equal to a third number(x+y=z). The sum of twice the first, three times the second, and twice the third is 7(2x+3y+2x=7). The third number is 3 more than the first(3+z=x), have I set the equations right? I

    asked by Me
  129. introduction to university studies

    how might knowing factors that influence behavior change help you with personal development

    asked by Anonymous
  130. chemistry

    On this problem I keep getting the wrong answer. I am subtracting the initial concentration of Cl2 by the equilibrium concentration then using the difference to subtract for the rest using the mole ratios. Then i used the keq constant equation of

    asked by andy
  131. chemistry

    Calculate the value of the equilibrium constant (Kp) for the reaction shown, if F(g) was found to be 96.80 % decomposed at 1000 K when its initial pressure was 4.638 atm. The initial pressure of the reaction products is 0 atm. 2F(g) = F2(g)

    asked by andy
  132. Math

    Design a rational function with the following characteristics: three real zeros, one of multiplicity 2; y-intercept 1; vertical asymptotes x=-2 and x=3; oblique asymptote y=2x+1.

    asked by I Need Help
  133. PHYSICS Gr.11

    Objects which are at rest or moving at constant velocity, may have forces acting on them. However the forces are said to be balanced. QUESTION: Which special force is zero, when the forces are balanced? thank you :)

    asked by NINI
  134. world liturature and language

    Write a three-paragraph comparison between themes in Márquez's "Old Man" and Kafka's "The Metamorphosis".

    asked by shannon
  135. chem

    if the reaction type is Synthesis then what would be the product of.. Fe subscript 2 O subscript 3 + H subscript 2 O

    asked by Sienna
  136. physical science

    What subdivisions make up the geologic time scale? What is the primary basis for differentiating the eras?

    asked by gina
  137. English

    Hi there, I am writing a english essay on 'Sophocles Oedipus the King' and I am trying to prove that Oedipus is not responsible for what happens to him. Could you help me come up with three strong arguments to support this.

    asked by Sarah
  138. Chemistry

    An alcohol will form an alkoxide ion when reacted with what?

    asked by Deirdre
  139. Science-Periodic Table

    Where r the elements that form ions with a positive charge located? where r the elements that form ions with a negative charge located? can someone please briefly explain this whole positive and negative charge thing to me. I kind of get it, but the

    asked by Sara
  140. Chemistry

    How can you tell if [ MnCl6]4- or [ Mn(CN)6 ] 4- has the longer wavelength of light? and then how do you figure out how many unpaired electrons each has?

    asked by Trixie
  141. English

    Why does Nick the narrator refer to character differently every time he talks to them? For example, sometime he refers to Tom as "Tom" but other times, he refers to him as "Tom Buchanan"? is there a reason for this?

    asked by Kathleen
  142. Science-Periodic Table

    describ how to verify the number of electrons in the atom of an element. You look at the atomic number which is the number of protons. The number of protons equals the number of electrons. please correct me if I'm wrong, thanks

    asked by Sara
  143. math

    12. Determine all possible digits to fill in the blanks to make each of the following true. (a) 9 „º482____

    asked by Anonymous
  144. Physics

    A particle of mass m0 is given a kinetic energy equal to one-third its rest-mass energy. How fast must the particle be traveling? please include units

    asked by Kyle
  145. science

    explain why the pressure of the gas particles incfreases as the volume is decreased.

    asked by mic
  146. Math

    I have a question. I need to graph the compound inequality of x5 and this is how my graph looks like: -6 -4 -2 0 2 4 6 Is this correct? Thanks.

    asked by B.B.
  147. social studies

    Why should a political system be unitary, federal, or confederal? If the U.S. were to have another constitutional convention, would we keep a federal system or change it? Why or why not?

    asked by Anonymous
  148. crt 205

    what questions would you ask yourself when evaluating an action on utilitarian gro

    asked by Tina
  149. math

    estimate by rounding the fractions a. 7 8/9* 5 1/13 b. 34 9/10 divided by 4 9/10 c. 14 19/39 divided by 19/39

    asked by yolanda
  150. geometry

    An A-frame house is 45 feet high and 32 feet wide. Find the measure of the angle that the roof makes with the floor. Round to the nearest degree.

    asked by Roslyn
  151. computer

    why are natural language not be suited for programming computer.

    asked by Larner 05
  152. Physics

    Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of

    asked by Ron
  153. College Speech.

    How would you write a speech in a manuscript form. I have no idea how. Please help need to send in my rough draft saturday night

    asked by Karina Lugo
  154. English

    If there is a long written poem in only one stanza, then does that indicate, that it is only following one pattern? What else does it indicate? If a poem is written in one whole stanza than is the poet who wrote that just talking about one thing wither in

    asked by Sara
  155. grammar

    The coordinating conjunctions that can be used to combine two complete sentences with a comma are “for, and, nor, because, yet, so.

    asked by Anonymous
  156. Physics

    Can someone post numerical answers!! Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15

    asked by Ron
  157. Math-stats

    I am having so much trouble calculating Type 2 error in simple questions, can someone pleaseeeee help me by explaining what to do? Let ƒÊ denote the true average diameter for bearings of a certain type. A test of Ho: ƒÊ = 0.5 versus Ha: ƒÊ ‚ 0.5

    asked by Franky
  158. spanish

    List the command for the following verbs. Use the él/ella form for bailar, estudiar,caminar,beber,escuchar,ompartir?

    asked by Ashauntae
  159. Chemistry

    does oxyanion contain oxygen? I think it contains oxide, but I'm not sure about oxygen. Thanks in advance!

    asked by Carla
  160. 11th grade

    On the issue of segregation, compare the views of Martin Luther King Jr. to those of Malcolm X.

    asked by Cassie
  161. ENGLISH

    WE'LL, WON'T... WHAT IS THE PROPER PHRASE FOR THESE WORDS? IS IT A COMPOUND WORD?

    asked by MAX
  162. Organic Chemistry

    Propose a synthesis of 2-methylpentan-3-one from any haloalkane containing fewer than 5 carbons. You may use any additional carbon compounds if you need.

    asked by trilla
  163. algebra

    sam has a science test on thursday. on monday he studies 3/8 of the material. on tuesday he studies 1/3 of the material. how much material has he studied

    asked by vern
  164. Physics

    Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of

    asked by Ron
  165. CHEMISTRY

    is it reasonable to expect the heat of neutralization to be the same regardless of which acid is used? or should we expect each acid and base combination to have its own heat of neutralization?

    asked by Jane
  166. Physics

    Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of

    asked by Ronald
  167. OChem

    What's the purpose of "PREPARATION OF A SYNTHETIC PLANT HORMONE Adapted from "p-Chlorophenoxyacetic Acid – Preparation of a Synthetic Plant Hormone." thanks

    asked by mina
  168. African American History

    Due to the long stretch of years of oppression and torture African Americans hae gone through in this country, they want reparation similarly to other groups including the Jews, Japanese, and the Native Americans. What solutions or strategies would you or

    asked by gina
  169. Physics

    Can someone actually ANSWER the question pleas and post numerical answers. Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The

    asked by Ron
  170. Science

    Hi, I have to write an opinionated article on the safety problems in space. I have to wrtie the issues that occur during a lift-off which are ignored I have been unable to find a website that tells me issues that occur but are ignored or thought that

    asked by Fresh
  171. Math

    Media service charges $20 for a phone and $30/month for its economy plan. The equation c=30t +20 describes the total cost,c, of operating Media Services phone for t months. A) The total cost for 8 months of service is? My answer $260 If a customer has only

    asked by Richard
  172. math

    if a=2^3*3^7*5^3*11^4 and b=2^2*3^5*7^2*11*13,find the following.(leave your anwer written with exponents)a.GCD b.LCM

    asked by yolanda
  173. finance 200

    I really do not understand how to do this or set this up. Can you please help me? Pro Forma Statements a. Mike Epstein is very optimistic because sales for his feed store are expected to double from $800,000 to $1,600,000 next year. His net assets (Assets

    asked by annonomous
  174. advanced algebra

    Q. x^-4/5=16 What is x Q. Suppose 0

    asked by roy
  175. chemistry

    How many grams of water can be made by the reaction of 1.25 grams of ethanol with 2.50 grams of oxygen?

    asked by Lacy
  176. calculus one

    Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=x^4,y=1; about y=5

    asked by lssa
  177. healthcare

    need combining form for midsagittal

    asked by tom
  178. CP Physics

    Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of

    asked by Ronnie
  179. Technology: ms.sue, bobpursley

    24. From a technological viewpoint, explain why farming has gotten less labor intensive over the last hundred years. You two helped me on this yesterday, and I combined your answers and added my own to it. Please let me know if it is okay. 24. Farming has

    asked by y912f
  180. Physics

    Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of

    asked by Ronald
  181. To: DrBob222

    Can you please check my previous science post. As of right now, you are the only science teacher on this site--which is why I am pleading you to. Thank you very much:-)

    asked by Sara
  182. chem

    how many mL of .100 M of acetic acid and .100 M of NaOH, would be need to make the volume 1.0 liters and have a pH7.00 if Ka=1.8x10^-5 please write out the steps or eq for me im gettin stuck

    asked by phil
  183. Pysical Science

    Suppose I give you 2kg of a substance at 90 degree C with a specific heat of .75 cal/g degree C. How much ice water will it take to cool the sample to 20 degree C?

    asked by Andrea
  184. science

    why do crickets chirp louder when it is warm. I think it is because they are ectotherms but i really do not know how to explain why. Thanks.

    asked by summer
  185. chemistry

    at 2 atm of pressure the volume of a ballon is 4.7 L. Assuming that the temperature remains constant, what will the volume of the ballon be at 1 atm of pressure?.

    asked by Anonymous
  186. math

    a sale at carney's electronic offers a specific model of sony radio at 20% off the reg price. if the sale price is 45 what is the reg price? would the answer be 54?

    asked by monica
  187. 1st grade

    show 25 cents in several ways

    asked by gina
  188. chemistry(please clarify my thoughts)

    for MO between C-S, is the sigma bond higher in energy than pie bond since it is applied to C.So when we do MO for C-S,do we use that rule in this as well

    asked by phys
  189. Calculus

    Find dy/dx in the following: y=[x/√(1-x²)]- sin‾¹x y'={[(1-x²)^(1/2)-(-2x)(x)(1/2)(1-x²)^(-1/2)]/(1-x²)} - (1/√(1-x²)) Then I multiplied (-2x)(x)(1/2) together. How do I simplify the rest?

    asked by sh
  190. College Physics

    The three bodies in the figure each have the same mass. If one of the bodies is moved 11.3 cm in the positive x-direction, by how much does the center of mass move?

    asked by Tristen
  191. math

    a survey was made of 200 students to study their use of the public library. the findings were 60 used readers guide 28 used card cat and info booth 68 used info booth 83 did not use the library 43 used only the card cat explain how the info can be used to

    asked by jessica
  192. 8th grade

    is light from a fire matter

    asked by jeremias
  193. math

    is this correct? 1.a jar contains 5 white, 15 violet,and 21 blue marbles. a marble is drawn at random. P(violet or white) answer: 5x15x21= 1575 15x5=75 75/1575= 1/21 2. a number from 10 to 16 is drawn at random. P(a number greater than 14) answer: 2/7

    asked by Jane
  194. 2nd grade

    wha is a parallel sides

    asked by ryan
  195. French

    If you're using the future tense, should the second verb be in the future as well? I'm trying to say I would like to study journalism. Is it J'aimerais etudier journalisme OR J'aimerais etudierai journalisme? Merci beaucoup!

    asked by Leslie
  196. Bus 210

    I need to make a slide presentation one of the slides has to do with transaction processing system. Can someone tell me where I can start?

    asked by Tracie
  197. college

    Perform the indicated operation (x3 + 2X-5) + (3x3 - X2 - 7)

    asked by Anonymous
  198. CHEMISTRY (Help please)

    Compare the results of the two measurements of a heat of neutralization (HCl&NaOH=11.58 kcal/mol) (CH3COOH&NaOH=13.06kcal/mol). Estimate the error in this. How close would they have to be to be considered identical? Quote numbers to justify your answer

    asked by Michelle
  199. Physical Chemistry

    Assuming that the activation energy is about 111kjmol-1, calculate the fractional variation in the rate constant that would result from a temparature of 323.15 K

    asked by Teri
  200. Physics

    Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an angle of 15 degrees. He pushes w/ a steady force of

    asked by Ronald
  201. math

    how to find the period of y = cos(6x)from your graph. what is the period of y=cos(6x) in radians?

    asked by subash
  202. Hard Latin 2 translation no idea

    Primum octo paria servorum eiusdem gentis, ab ultima Sarmatia processerunt; sed minus acriter pugnaverunt quam populus exspectabat et, omnibus irridentibus, ex arena discesserunt. Postea decem Thraces !@#$%^& decem Britannis melius pugnaverunt. Unus e

    asked by alex Karp.
  203. Greenhouse effect

    im doin a project on da greenouse effect if you know any neat facts ill be happy to hear what u have 2 say

    asked by Anonymous
  204. Pre-Cal

    how do we put x^2-2y^2=4 into a standard equation???

    asked by Soto
  205. Math

    I have tried to figure out this problem and I just don't seem to understand. Could someone please help? I need to write a solution in interval notation for x

    asked by B.B.
  206. Science

    • Describe forces resulting from natural phenomena that can have severe consequences on structures in the environment and identify structural features that help overcome some of these forces

    asked by RJ
  207. 11th grade Algebra 2

    For each of the following sets determine it the represent the side lengths of a right triangle? A. 5, 6.5, 7.9 B. 1.6, 1.2, 2 C. 5, 1.3, 1.5 D. 1.5, 2, 2.5

    asked by David Nipp
  208. grammar

    In the following sentence, the comma is used correctly with an introductory clause: “Training for the upcoming ten-mile marathon, Lizette includes more protein and complex carbohydrates in her diet.

    asked by Anonymous
  209. grammar

    which is correct 1,2,or 3 Paloma did not make it to work for, her car broke down on the freeway. Paloma did not make it to work for her car, broke down on the freeway. Paloma did not make it to work, for her car broke down on the freeway.

    asked by Anonymous
  210. Bibliography

    How do you write in APA format a bibliography?

    asked by Fresh
  211. math

    paul paints a house in 4 hours, mike paints the same house in 6 hours. how long will it take them both to paints this house?

    asked by karen
  212. calculus high school

    7y^4+x^3y+x=4 using implicit differentation, how do i solve this problem. it is a textbook example but the partwhere i "use the chain rule on the first term" doesn't make sense to me because they get d/dx 7y^4+(x^3dy/dx +y d/dx x^3)+d/dx x

    asked by k
  213. Health

    (Patient Self-Determination Act) How do you think records management procedures have had to respond to this piece of legislation?

    asked by earth
  214. English

    Thank you very, very much for your last corrections! Can you tell me if the following expressions are possible and therefore correct? 1) When approaching/charging the dragon, Beowulf raised his shield and drew his sword. Differently, in contrast, (can you

    asked by Franco
  215. Science

    why do plastics have to be separated before recycled? Like different kinds of plastics are separated by why? Im on the organic chem unit right now.

    asked by Lena
  216. 3rd grade

    refer to the frequency table to anwser the questions

    asked by haley
  217. To: bobpursley

    Can you please check my other science posts as well. They are still on the 1st page, thank you very much:-)

    asked by Sara
  218. algebra

    Solve 0.3+4

    asked by jess
  219. VOCABULARY

    INCESSANT HAMMERING

    asked by MISS AYON
  220. spanish

    Form complete sentence using the imperfect: Cada semana/yo/asistir a/escuela primaria

    asked by daniel
  221. Physics

    What would be some everyday items that would be good insulators to protect three eggs that I have to drop from the top of the football bleachers in an approx. 2 quart size container? I can't use food or packing peanuts, bubblewrap, etc. Thanks.

    asked by Lynn
  222. Geology

    How can we calculate the volume of a cylinder without knowing the mole of He and applying ideal gas low with the variable of pressure.

    asked by Arijit
  223. Intro Chemistry

    Whats the name for HI(aq)? I thought it was Hydrogen Iodide, but that's incorrect, does the aq change the name?

    asked by echem
  224. math

    a 46 5/16 lb bag of nuts is packaged in 1 3/4 lb containers. the remaining nuts are given to the person packing the nuts. how much does the person get? justify your answer

    asked by michele
  225. math

    george owns a brick home that has a replacement value of $98,000. he insured it for 90% of its replacement value he lives in an area rated fire protection class 10. what is his annual policy premium?

    asked by kk
  226. math

    find the greatest possible area for the given perimeter for rectangular bumper car rides p=60in

    asked by janelle lopez
  227. Alkalis and Acid

    Two alkalis and two acid used in the labratory

    asked by Tiatun
  228. social studies

    How do people choose where to settle and live ?

    asked by hannah
  229. literary

    what is a good analogy for the word topic

    asked by harmony
  230. health management

    A health agency experience an average 150+ days in it's receivables. Would you look to a 90 day or 30 year mortgage fo financing

    asked by BarBara
  231. 3rd grade

    how do environmenys change?

    asked by valetino
  232. math/chem

    If a cube with edges of 1.000 cm weighs 25.68 g, what would the mass of a cube of the same material with sides 2.66 cm in length be? I got 68.301 but it was wrong... i basically made a ratio 25.68 g/1cm and did 2.66cm x 25.68 (dimensional analysis) This

    asked by echem
  233. math

    if your monthly net pay is $1500 what is the recommended FHA minimum

    asked by kk
  234. Literacy

    Do the benefits of the Basal Approach outweigh the drawbacks?

    asked by Anonymous
  235. Technology

    22. Telecommunications is a growing field of technology. We use such things as televisions, telephones, radios, and computers to communicate using electromagnetic waves. Take one of these devices and explain the five steps it must go through in the

    asked by y912f
  236. Mica

    Can someone factor this for me? y=x^4-4x^3+16 i could only get up to: y=(x-2)(x^3-2x^2-4x-8)

    asked by Math factoring
  237. Technology

    21. You have learned that there are seven inputs common to all technological systems. List these inputs and give an example for each one. 21. There are seven inputs that are common to all technological systems. These include people, materials, tools

    asked by y912f
  238. Chemsitry

    What is the phase of a compound at 600 mmHg and 32oC if it melts at 35oC when pressure is 760 mmHg? Its triple point occurs at 200 mmHg and 36oC.

    asked by Dan
  239. algebra

    x – 2y = 6

    asked by jeff
  240. Math

    The width of a rectangle is fixed at 16 cm. What lengths will make the perimeter greater than 78cm? Would the answer be 23 because 16*2+23*2=78cm or would the answer be 24. Because the perimeter is greater than 78cm

    asked by Richard
  241. Technology

    Is there anyone who can double check this for me? 21. You have learned that there are seven inputs common to all technological systems. List these inputs and give an example for each one. 21. There are seven inputs that are common to all technological

    asked by y912f
  242. english

    how do you write a survey questions

    asked by hemi
  243. history

    i need good references for political groups during the russian revolution

    asked by blue
  244. algebra 2

    t^2-11t+28=0

    asked by april
  245. math-please help

    if a=2^3*3^7*5^3*11^4 and b=2^2*3^5*7^2*11*13,find the following.(leave your anwer written with exponents)a.GCD b.LCM

    asked by yolanda
  246. math

    division (x to da 2nd power + x - 6) / (x - 2)= ?

    asked by crystal
  247. 4th grade

    what does 9 over 18 and 10 over 34 means?

    asked by kaleyah
  248. health

    why is a healthy lifestyle important in school

    asked by tiffany
  249. jsp

    can you modify an attribute of the application object after it has been set?

    asked by cl
  250. algebra

    x/x+3 + 2/5=0

    asked by Anonymous
  251. Europe

    is the european union federation, a confederation or something else?

    asked by kev
  252. Grade 12 English - College Assignment

    I have to mention the route I will take from my home to Seneca@York via public transit. Should I mention the route that takes me back home from the college?

    asked by AL 87
  253. 6th grade math

    7-6&4/9 please help!

    asked by Anonymous