Questions Asked on
June 30, 2010

  1. chemistry

    for a homework problem it says to build both the high spin and low spin complex ion and it gives me spin of Fe (ox)3 3- low high I don't understand what high spin and low spin is and I don't know what Fe (ox)3 3- is suppose to be

    asked by Judy
  2. Chemistry

    Calculate Delta H for 4NH3 + 5O2 --> 4NO + 6H2O using: N2 +O2 --> 2NO DH= -180.5 kJ N2 + 3H2 --> 2NH3 DH= -91.8 kJ 2H2 + O2 --> 2H2O DH= -483.6 kJ

    asked by Taylor
  3. Physics

    Two vectors A. and B have magnitude A = 3.00 and B = 3.00. Their vector product is A x B= -5.00k + 2.00i. What is the angle between A and B?

    asked by Jay
  4. Physics

    A stone is dropped from the top of a cliff. The splash it makes when striking the water below is heard 3.5 s later. How high is the cliff

    asked by Gary
  5. chemistry

    for SCN- if S-C has a bond order of 1, S=C and C=N have bond orders of 2, and C triple bond N hasa bond order of 3, ... Do the bond length in SCN- point to one resonance structure over the other? Which one?

    asked by Jin
  6. equilibrium constant

    WHat is the accepted equilibrium constant for ferric thiocyanate [FeSCN2+]? I can't find a reliable number anywhere. Thanks in advance.

    asked by CHeem
  7. Geometry

    Which statement is true? A. The altitude drawn to the leg of a right triangle forms two triangles that are similar to each other and to the given triangle. B. The altitude drawn to the hypotenuse of a right triangle forms two triangles that are similar to

    asked by Superman
  8. Chem 1C

    What is the electron configuration of an isolated Fe atom (no ligands bound to it)? (Use notation like [Ne]3s^23p^6 for your answer) B. What is the electron configuration of an isolated Fe3+ cation? (Use notation like [Ne]3s^23p^6 for your answer)

    asked by M.R.
  9. geometry

    the base of an isosceles triangle is 18 centimeters long. The altitude to the base is 12 centimeters long. What is the approximate measure of a base angle of the triangle?

    asked by SL
  10. Physics

    Using Planck’s constant as h = 6.63 E-34 J*s, what is the wavelength of a proton with a speed of 5.00 E6 m/s? The mass of a proton is 1.66 E-27 kg. Remember to identify your data, show your work, and report the answer using the correct number of

    asked by Haley
  11. Organic Chemistry

    Which hybrid orbitals would NOT be possible in electrically neutral molecules containing the elements shown? 1. sp3/Al and H 2. sp2/B and F 3. sp3/O and F 4. sp2/N and O 5. sp/C and H

    asked by Sarz
  12. biology

    in a vacuum the coloured particles of potassium manganate(vii)would move very quickly in water. why would it move slow at room temperature?

    asked by Mary
  13. consumer math

    Jan borrowed $1,200 at 11.5% interest for three months. How much does she have to repay under a single-payment plan?

    asked by gabe
  14. chemistry

    he Fe(ox)33– complex ion creates an emerald green solution when dissolved. The observed solution color of the complex indicates the size of o is: A. large. B. small. C. in between. D. inconclusive, more information is needed. The observed solution color

    asked by ....
  15. science

    what volume of benzene ( C6H6 d=0.88g/ml molar mass = 78.11) is required to produce 1.5*10^3 kj of heat

    asked by na
  16. Individual Income

    1. Ann Bolen's husband died last year. Ann maintains a household where she and her 8-year-old daughter reside for the tax year. On her tax return, she properly claims a dependency exemption for her daughter. For the current year, Ann should file her tax

    asked by Kheang
  17. Chemistry

    25.0 mL of 0.100 M acetic acid (Ka= 1.8 x 10^-5) is titrated with 0.100 M NaOH. Calculate the pH after the addtion of 27.00 mL of 0.100M NaOH. my work CH3COOH + H2O H3O^+ + CH3COO^- 25mL x 0.100 mmol/ml = 2.5mmol CH3COOH 27mL x 0.100 mmol/ml = 2.7mmol NaOH

    asked by Anonymous
  18. Chemistry

    An excess of zinc metal is added to 50.0 mL of a 0.100 M AgNO3 solution in a constant-pressure calorimeter. Assuming that the density of the solution is the same as for water, calculate the mass of the solution.

    asked by Haley
  19. american government

    Voter registration in the United States: a)was introduced as a means of keeping white males without property from voting b)applies to voting in general elections but not primary elections c)has been a device by which official have discouraged some groups

    asked by vedrana
  20. English

    Revise the following sentences to create parallel constructions. (Question) Some students hate math; some students dislike math, and math is liked by other students. (my answer) Some students hate math, some dislike math, and some like math. every way I

    asked by Rita
  21. Geometry

    I have a pizza. The radius is 10 inches long. The pizza was cut into 16 equal slices. When 1 slice was left, my sister and I both wanted it, so we agreed to cut it in half, but I like the crust more than she does, so we decided to cut it the "other way."

    asked by Kathy
  22. Algebra I

    Pump A, working alone, can fill a tank in 3 hours, and pump B can fill the same tank in 2 hrs. If the tank is empty to start and pump A is switched on for one hour, after which pump B is also switched on and the two work together, how many minutes will

    asked by Meredith
  23. English 101

    Sports fans may disagree about whether going to baseball games or to watch football is more fun, but few people can ignore the importance of sports in America. A This sentence is parallel. B This sentence is not parallel. Some sports fans argue endlessly

    asked by Deedward
  24. Algebra 1

    what's the LCM of: 2r-1 , r+4

    asked by Ana
  25. Calculus

    If a ball is thrown into the air with a velocity ofc 40ft/s,its height in feet after t seconds is given by y=40t-16t^2. Find the velocity when t =2. Could you please show the steps

    asked by Eileen
  26. chemistry

    The Fe(ox)33– complex ion creates an emerald green solution when dissolved. The observed solution color of the complex indicates the size of o is: A. large. B. small. C. in between. D. inconclusive, more information is needed. The observed solution color

    asked by Jin
  27. half-life

    ok so i got... the half life of carbon-14 is 5730 years, the relation c+(1/2)^ N/5730 is used to calc. the concentration, c, in parts per trillion remaining n years after death determine the carbon concentration in a 11460 year old bone. please help :)

    asked by bubb
  28. Algebra

    Library Research Assignment Please help with Discussion board problem Suppose that the number of new homes built, H, in a city over a period of time, t, is graphed on a rectangular coordinate system where time is on the horizontal axis. Suppose that the

    asked by Mayl
  29. AP chemistry

    If 5.00 103 kg each of NH3, O2, and CH4 are reacted, what mass of HCN and of H2O will be produced, assuming 100% yield? 2 NH3(g) + 3 O2(g) + 2 CH4(g) 2 HCN(g) + 6 H2O(g)

    asked by Kelli
  30. Calculus-implicit differentiation

    How do I find the normals to the curve xy+ 2x - y = 0 that are parallel to the line 2x + y = 0

    asked by John
  31. Chemistry

    A buffer prepared by mixing equal amounts of the salts Na2HPo4 and NaH2PO4 to give a total phosphate concentration of 0.1M. What is the concentration of Na ions? I believe it is 0.3M but am having trouble understanding why when I write out the dissociation

    asked by Richard
  32. Science

    Two equal and opposite forces of 5.0 N act on an object. What is the unbalanced force on the object?

    asked by Mary
  33. half-life

    ok so i got... the half life of carbon-14 is 5730 years, the relation c+(1/2)^ N/5730 is used to calc. the concentration, c, in parts per trillion remaining n years after death determine the carbon concentration in a 11460 year old bone. please help :)

    asked by bubb
  34. Calculus

    How do I find the normals to the curve xy+ 2x - y = 0 that are parallel to the line 2x + y = 0

    asked by John
  35. alg

    multiply: 15a^2 / 14 * 7 / 5a a) 3a^2 / 2 b) 6a c) 21a / 2 d) 3a / 2

    asked by anth
  36. Geometry

    Which statement is true? A. The altitude drawn to the leg of a right triangle forms two triangles that are similar to each other and to the given triangle. B. The altitude drawn to the hypotenuse of a right triangle forms two triangles that are similar to

    asked by Superman
  37. math

    what does term "factor each expression" mean in 8th grade math?

    asked by girly t.
  38. childcare

    I have to do a lesson plan on diversity for my class and im not sure what kind of lesson plan to do and i cant find any websites that help me can some please give me suggestions on diversity

    asked by karrie
  39. quadratics

    a firework is modelled by the relation h=-4.9(t-9)^2+170 h=height above ground in metres and t=time in seconds what are the co-ordinates of the vertex of this parabola?

    asked by kyle
  40. Geometry

    Which is the hypotenuse-angle theorem? ________________________________________ A. If the hypotenuse and an acute angle of a right triangle are congruent to the corresponding parts of another right triangle, then the triangles are congruent. B. If the

    asked by Superman
  41. math

    There are five girls and five boys at a party. In how many ways can they be seated in a row of six?

    asked by Leslie
  42. math

    x+3=-(2x+2)

    asked by lisa
  43. Calculus

    Find the Limit lim as t approaches 1 of (t^3+5t^2-13t+7)/(t^3-3t+2)

    asked by Kelly
  44. chemistry

    How much ammonia is produced if 1.80 m3 of hydrogen reacts with 0.5m3 of nitrogen? Also state which reagent is in excess and by how much? Question is related to the Haber process. Please can anyone answer this for me by 02 July 2010. Thanx

    asked by Anonymous
  45. Chemistry

    How much ammonia is produced if 1.80 m3 of hydrogen reacts with 0.5m3 of nitrogen? Also state which reagent is in excess and by how much? Question is related to the Haber process. Please can anyone answer this for me by 02 July 2010. With all equations.

    asked by Matt
  46. Math

    Find a polynomial of degree 3 with roots 3, 4 - i. Which one is it? A.x3 - 10x + 15 B.x3 + 15x2 + 4x - 50 C.x3 - 11x2 + 41x - 51 D.x3 + 24x2 + 3x - 12

    asked by Paul
  47. math

    Find the balance in Myra's account after 1 year if her bank paid 5.75% simple interest on her deposit of $6,000

    asked by ange
  48. Chemisrty

    If you were balancing a chemical equation that contained the substance sodium nitrate, NaNO3, composed of a sodium ion, Na+1, and a nitrate ion, (NO3)-1, what number or numbers could you change in order to balance the equation?

    asked by Liz
  49. biology

    the observations that led to the formation of the cell theory occured whithin a 17-year period.why do you think that more than one scientist made critical observations about cells within this period?

    asked by amanda
  50. biology

    what general statement about the conditions necessary about enzyme-catalysed reactions can be written as a result of the experiment To Investigate the action of an Enzyme?

    asked by Mary
  51. Physics

    You shoot an arrow into the air. Two seconds later (2.00 {\rm s}) the arrow has gone straight upward to a height of 32.0 m above its launch point. What is the initial velocity and how long did it take for the arrow to reach 16.0 m above the launch point?

    asked by Todd
  52. math

    in a skew symmetric, how do we explain that its diagonal entries has to be all 0 without giving examples to support it

    asked by eng
  53. Physics

    An automobile with a mass of 100kg is moving north on a level straight highway with a constant velocity of 80km/h. What is the unbalanced force acting on the automobile?

    asked by savey
  54. Organic Chemistry

    Which of the following minor products could NOT arise from the halogenation rxn below? 2-methylpropane + Br2 -> 1-bromo-2-methylpropane + HBr + minor products a) 2,5-dimethyl hexane b) 2-bromo-2-methylpropane c) 1,3-dibromo-2-methylpropane d)

    asked by Sarz
  55. health

    When comparing hemodialysis and peritoneal dialysis, it can be said that A. hemodialysis takes longer than peritoneal dialysis. B. peritoneal dialysis involves the removal of blood from the patient. C. hemodialysis is a step closer to the need for

    asked by Linda
  56. Algebra

    Hi, Any help on this would be very much appreciated. The graph y=3x^2+6x+9 is a parabola, I need to use algebra to find the equation of the axis of symmetry, I then need to use this information to find the coordinates of the vertex. Any ideas? Many thanks

    asked by Sam
  57. Geometry

    Hello, can someone help me with the following? I don't quite understand it 'Write the hypothesis, the conclusion, and the converse of the conditional statement' If R =180 Hypothesis_________ Conclusion_________ Converse___________ Thanks in advance.

    asked by Tamir
  58. Algebra

    In a certain soccer league, each of the five teams plays every other team in the league exactly three times each season. How many games are played in total in one season? a) 15 b) 24 c)30 d)60 e)120

    asked by Pomi
  59. business

    Can anyone help me with this, i spent 1 hour trying to search this on google but nothing pops up. This is about self monitoring blood glucose at home who donated the startup costs(it would be great to include the amount) for development and prodution of

    asked by flame
  60. physics

    During a particular thunderstorm, the electric potential between a cloud and the ground is Vcloud - Vground = 2.9 x 108 V, with the cloud being at the higher potential. What is the change in an electron's potential energy when the electron moves from the

    asked by Debi
  61. business ethics

    which of the following is NOT one of the key requirements for auditor independence?

    asked by Tu'Lyishus
  62. math

    Describe a simple process for using rates and unit prices that might help someone who is having difficulty understanding these concepts. Include either an example from the text or one of your own examples to explain the solution process. I need help

    asked by
  63. Communication and Gender Studies

    How Could this dilemma be resolved?: A porcupine is looking for a place to live in the winter. A family of moles invites the porcupine to stay with them. But after a while, they discover that they are constantly being pricked by the porcupine's quills.

    asked by Alicia
  64. GEOMETRY

    Which of the following are measurements of the sides of a right triangle? ________________________________________ A. 10, 8, 6 B. 13, 12, 5 C. 26, 24, 10 D. all of the above IDK HOW TO PUT THEM N2 THE PATHAGOREAM THEOREM.

    asked by Superman
  65. alg

    simplify: 10^C6 a) 60 b) 210 c) 151,200 d) 1,000,000 c

    asked by sean
  66. Math

    Determine the slope of the tangent line to the curve y=2x^3-3x^2+1 at the point (1,0)

    asked by Eileen
  67. English

    1. A rainbow is an arch of seven different colors, red, orange, yellow, green, blue, indigo and violet. (is this grammatically correct?) 2. What is the color of the tulip? 3. What's the tulip's color? 4. It's pink. 5. It's the color pink. 6. It's the pink

    asked by rfvv
  68. math

    What can be concluded about a rectangle's width if the ratio of length to perimeter is 1 to 3? Make some sketches and explain your reasoning.

    asked by Dborah
  69. chemistry

    how do you know which bonds have a more pie bonding character than the other bond? and how do you know if it point to one resonance structure over the others?

    asked by Jin
  70. american government

    Public opinion is ordinarily used in reference to whole society.This perspective is: a)accurate,since Americans are one people and indivisible b)less accurate than a view of public opinion based on the majority,since the political system operates on the

    asked by vedrana
  71. Math

    How do you convert a number to whatever base it indicates? For example: convert 252 base six to base five. I have tried posting for my teacher to help me, but he doesn't seem to get what I am asking. Can someone please explain the process and not just the

    asked by Heather
  72. Physics

    Two vectors A and B have magnitude A = 3.00 and B = 3.00. Their vector product is A x B= -5.00k + 2.00i. What is the angle between A and B?

    asked by Francis
  73. English

    pronoun antecedent agreement how can you rephrase this sentences into a more meaningful one. I really need this. Thank you for your help. :) 1. Before she could to her mother, she fainted. 2. Pamela bought a bracelet for her sister which she liked very

    asked by Cassandra
  74. learning and memory

    what are examples of conditioned stimuli, unconditioned stimuli, conditioned response, and unconditioned response?

    asked by denise
  75. business

    Construction of a new plant: Architect's fees $ 4,000 Cash paid for land and run-down building thereon 120,000 Removal of old building 18,000 Salvage from sale of old building parts (4,000) Survey to site the new building 800 Legal fees for title search

    asked by aa
  76. chemistry

    how do you know which bonds have a more pie bonding character than the other bond? and how do you know if it point to one resonance structure over the others?

    asked by Judy
  77. Physics

    You shoot an arrow into the air. Two seconds later (2.00 {\rm s}) the arrow has gone straight upward to a height of 32.0 m above its launch point. What is the initial velocity and how long did it take for the arrow to reach 16.0 m above the launch point?

    asked by Todd
  78. Statistics

    Using the major League Baseball Data set available through the "Data Sets" lin in the materials section, answer the research question of whether the number of wins of a team can be explained linearly by the size of stadium, ERA, and stolen bases. Prepare a

    asked by Melissa
  79. health

    When comparing the flow of lymph in the lymphatic system with the flow of blood in the circulatory system, it can be said that the lymphatic system also A. uses a pump. B. contains fluid that travels in only one direction. C. uses valves to prevent

    asked by Linda
  80. Science

    Distance covered per unit of time is called what.

    asked by Mary
  81. physics

    Distance covered per unit of time is called _________.

    asked by Mary
  82. geometry

    Which of the following are measurements of the sides of a right triangle? ________________________________________ A. 10, 8, 6 B. 13, 12, 5 C. 26, 24, 10 D. all of the above

    asked by Superman
  83. american government

    Why has the Commerce Clause been used to target agriculture, transportation, finance, labor relations and the workplace?

    asked by Anonymous
  84. american government

    All of the following are characteristcs of a realigning election EXCEPT: a)sharp divisions between the parties b)major policy initiatives by the winning party c)a very close electoral result d)the disruption of the existing political order ID C CORRECT

    asked by vedrana
  85. alg

    Dwanye has 18 shirts hanging in his closet. He is going to donate 4 of them to a clothing drive. How many combinations of shirts can Dwanye use for his donation? a) 73,440 b)72 c) 104,976 d) 3060 b

    asked by sean
  86. math

    multiply -7(2a-4)

    asked by hally
  87. alg

    which expression represents the sum of the following? 7 / a - 1 + 3 / 2a - 2 a) 10 / 3a - 3 b) 17 / 2(a - 1) c) 17 / 2(a -1)^2 d) 10 / 2a - 2

    asked by sean
  88. English

    1. Blue helps with headaches. (What is the meaning of 'with' in this sentence?)

    asked by rfvv
  89. chemistry

    how do you know which resonance structure is more stable according to the energy? does higher energy mean more stable?

    asked by Jin
  90. BIOLOGY

    what is the result if an enzyme reacts with crushed tissues?

    asked by Mary
  91. Geometry

    I have a 45-45 special right triangle who's hypotenuse is 12, how do I find the other two side lengths?

    asked by Ana
  92. Finance

    You are the supervisor for a large technology-based corporation. One of your subordinate managers, Carly, is heading up a project for a new system that is scheduled to market on the 1st of the year. It is August and things are not progressing at the pace

    asked by mee
  93. English grammar

    How to phrase this sentence in a better way? "This is to ensure stable and high level performance in the branch¡¯s developing stages."

    asked by B.
  94. Phy

    You shoot an arrow into the air. Two seconds later (2.00 {\rm s}) the arrow has gone straight upward to a height of 32.0 m above its launch point. What is the initial velocity and how long did it take for the arrow to reach 16.0 m above the launch point?

    asked by Todd
  95. english

    Which sentence below contains a dangling modifier? Finding a place to sleep, the bed was comfortable. The bed was a comfortable place to sleep. Finding a place to sleep was difficult. Finding a place to sleep, the children thought the bed was comfortable

    asked by Anonymous
  96. Math

    I need to describe what the graph of interval [-4, 10] looks like. I have a really hard time explaining math in words.

    asked by C.J
  97. alg

    X Y 15 N 18 8 1/3 24 6 1 / 4 The table above represents an iverse vartiation. What is the value of N? a) 15 b) 10 c) 12 1 /2 d) 5 1 /2

    asked by anth
  98. business ethics

    which instance is an example of internal mechanisms working to prevent criminal behavior?

    asked by Tu'Lyishus
  99. health

    When comparing the blood smears of patients with intact spleens to those of patients without spleens, the blood smears of patients without spleens will likely reveal A. many more fragile and old erythrocytes. B. many more lymphocytes and monocytes. C. many

    asked by Jackie
  100. health

    When comparing hemodialysis and peritoneal dialysis, it can be said that A. hemodialysis takes longer than peritoneal dialysis. B. peritoneal dialysis involves the removal of blood from the patient. C. hemodialysis is a step closer to the need for

    asked by Jackie
  101. English

    I forgot to include the following sentences which are part of the same reading comprehension. Thank you very much. 8) Why couldn't they fly to Merida? Because their seats hadn't been booked. 9) Does the tourist regret going to Merida? Yes, he/she does. He

    asked by Franco
  102. intermediate algebra

    3(5-7)^8 divide 4

    asked by David
  103. Science

    A car is moving down a freeway in a straight line at a constant rate of 25 m/s. What is its acceleration?

    asked by Mary
  104. Algebra 1

    Is this correct? (3m^2/2n )* (n^2/12) = m^2*n/8

    asked by Ana
  105. Algebra 1

    Is this correct? (3m^2/2n )* (n^2/12) = m^2*n/8

    asked by Ana
  106. alg

    find the LCD for the following rational expressions. -3 / (x^2 - 2x) + 1 / 2x (x^2 - 5x + 4) a) ( x - 1) (x - 4) b) (x - 1)^3 (x - 40 c) (x - 1) (x + 4) d) (x - 1)^2 (x - 4) did i write it the correct way

    asked by sean
  107. Algebra 1

    What's the answer to [(x-2)(x+2)/x(8x+3)]*[2(8x+3)/(x-2)] is it 2x+4/x or 6?

    asked by Ana
  108. Math

    P/3 - 3P/8 =

    asked by Angela
  109. Percentages

    20 is what percentage of 372

    asked by John
  110. history

    What were John !@#$%^&ennedy's key legislation?

    asked by kelly
  111. math

    8m+n=12 m-5n=22 solve using substitution method

    asked by Anonymous
  112. geometry

    What are corresponding sides?

    asked by Alisha
  113. biology

    what would occur if an acid is mixed with an enzyme?

    asked by Mary
  114. chemistry

    how do you know which resonance structure is more stable according to the energy? does higher energy mean more stable?

    asked by Judy
  115. QUADRATICS.

    so given the relation y=34(1.04)^x state the initial value and also is this relation growth or decay? how do you know?

    asked by kyle
  116. business ethics

    Select the option that can be used to illustrate a utilitarian argument concerning ethical issues in marketing.

    asked by Tu'Lyishus
  117. MATH PERCENTAGES

    HOW TO FIND THE PERCENT SAVED DIFFERENCE OF 310,951.00 ALLOWED 214,546.60 USED ----------- 96404.40 TOTAL SAVED

    asked by ELTINYO VT
  118. algebra 2

    if (x-8)(x+5)=0 what are 2 possible values of x

    asked by uniqua
  119. English

    Thank you vey much for helping me! I still have some doubts about the use of passive and reported speech.I also hope you can check the following reading comprehension. 1) I had lunch at five. Lunch was had at five?? 2) "How do you do?" She asked me how I

    asked by Franco
  120. health

    The Papanicolaou test is used to detect A. conization in situ. C. minimal cervical dysplasia. B. protein in the urine. D. colonic polyposis Would this be A. Conization in situ?

    asked by Penny
  121. health

    what happens when a patient is not aware of their rights?

    asked by cortez