Questions Asked on
May 24, 2008

  1. chemistry

    what is the molecular geometry of trans-difluroethylene: trans-C2H2F2? I know how to draw the lewis structure but I'm not sure how to find the molecular geometry. I think it's a tetrahedral

    asked by Cabel
  2. chemistry

    what is the molecular geometry of trans-difluroethylene: trans-C2H2F2? i want to say it is a tetrahedral because it has four atoms and no lone pairs, but im not sure. the bond angles of this is 109.5 and that is is the bond angles for tetrahedrals so is it

    asked by john
  3. chemistry

    What is the bond order of OH- and OH+? I tried to solve it but couldn't so Im about to give up. Help me please.

    asked by Tom
  4. chemistry

    In the reaction 2HNO3(aq) + Cu(s) + 2H+(aq) ¨ 2NO2(g) + Cu2+(g) + 2H2O(l) Which of the following statements is correct? A.HNO3 is the reducing agent, and Cu is the oxidizing agent B.HNO3 is the reducing agent, and H+ is the oxidizing agent C.Cu is the

    asked by Rapinder S.
  5. chemistry

    The oxidation number of chromium (Cr) in the dichromate ion (Cr2O72-) is A. +2 B. +4 C. +6 D. +7 E. -2

    asked by Rapinder S.
  6. math

    a plane with an airspeed of 192mi/h is headed on a bearing of 121 degrees. a north wind is blowing (from north to south) at 15.9 mi/h . find the ground speed and the actual bearing of plane.

    asked by T
  7. math

    A girl reads 3/5 of a book. She finds that there are still 80 pages left to be read .how many pages are there in the book?

    asked by vijay
  8. Polish -> English translation

    What does "badz chiho" mean?

    asked by Anonymous
  9. chemistry

    How many grams of copper is deposited from an aqueous solution of copper sulfate, (CuSO4(aq)), by passing one mole of electrons into a copper plating cell? A. 254g B. 127g D. 42.3g E. 31.8g

    asked by Mable
  10. chemistry

    How many grams of copper is deposited from an aqueous solution of copper sulfate, (CuSO4(aq)), by passing one mole of electrons into a copper plating cell? A. 254 g B. 127 g C. 63.5 g D. 42.3 g E. 31.8 g

    asked by Rapinder S.
  11. physics

    TRUE OR FALSE The virtual image formed by a convex mirror is always enlarged. A convex mirror never forms a real image of a real object. When the object of a concave mirror is inside the focal point, the image is virtual. The image produced by a convex

    asked by help?
  12. SCIENCE

    I have to find research about Jan van Helmont's work on Spontaneous Generation and I am having trouble finding info. about it and how he conducted the experiment..also i have to figure out the strengths and weaknesses of the experiment and is it considered

    asked by Amanda
  13. chemistry

    what is the molecular geometry of trans-difluroethylene: trans-C2H2F2? i want to say it is a tetrahedral because it has four atoms and no lone pairs, but im not sure.

    asked by john
  14. Math

    a plane with an airspeed of 192mi/h is headed on a bearing of 121 degrees. a north wind is blowing (from north to south) at 15.9 mi/h . find the ground speed and the actual bearing of plane.

    asked by Tareena
  15. Redox Half Reactions

    Half reaction of 2 Al2O3 + 3 C → 4 Al + 3 CO2

    asked by Jonathan
  16. spainish 7 grade

    I am trying to translate the following sentence from english to spanish is there a web- site that may be able to help me thanks The family will wash clothes. Please do not send any clothes to be washed thanks.

    asked by lucindia
  17. math

    A man spends 2/5 of his money and had Rs.30 left .how had he initially?

    asked by vijay
  18. Math

    Two Planes leave an airport at the same time, one flying 300km/h and the other at 420km/h The angle between their flight paths is 75 degrees after three hours, how fart apart are they?

    asked by Tareena-- check my answer please
  19. chemistry

    An electrolytic cell transferred 0.10 mol of electrons when a constant current of 2.0 A was applied. How many hours did this take? A. 4800h B. 80h C. 1.3h D. 0.75h E. 0.012h

    asked by Rapinder S.
  20. grade 12 chem - check my answer again please

    Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS + 7O2 --> 2Fe2O3 + 4SO2 Calculate the % yield. My Answer: nFeS=23.4g/87.92 g/mol =0.266 mol 4mol FeS /

    asked by Sarah H
  21. physics one more

    A dime .334 m away from, and on the optical axis of, a concave spherical mirror produces an image on the same side of the mirror as the source. The image is .093 m away from the mirror. If the dime is moved on the axis to .229 m from the mirror, how far

    asked by help?
  22. chemistry

    Experiments show that chlorine is reduced by both Br-(aq) and I-(aq); bromine is reduced by I-(aq) only; iodine is not reduced by either Br-(aq) or I-(aq). Which of the following is the strongest oxidizing agent? A. Cl2 B. Br2 C.I2 D.Cl^- ion E. I^- ion

    asked by Rapinder S.
  23. Math

    A traingle has an area 48sqaure cm and its shorter sides have lenghts 9 cm and 12cm. Find the largest angle of the triangle

    asked by Tom
  24. MATH

    a traingle has an area 48 square cm and its shorter sides have lengths 9cm and 12cm. find the lagest angle of the traingle.

    asked by T
  25. gr. 12 chemistry

    Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS = 7O2 --> 2Fe2O3 + 2SO2 Calculate the % yield. My Answer: nFeS=23.4g/87.92 g/mol =0.266 mol 4mol FeS /

    asked by Sarah H
  26. MATH

    Two Planes leave an airport at the same time, one flying 300km/h and the other at 420km/h The angle between their flight paths is 75 degrees after three hours, how fart apart are they? answer: so it would be c^2=a^2+b^2-2ab cos C

    asked by T
  27. Social Studies

    How was/is the law and order kept in the society? We're learning about the government of Ancient Rome. Full Question: How was/is the law and order kept in the society of Ancient Rome and how did the government ensure the society would follow the law?

    asked by Tracey
  28. writing

    Thesis help, please? for a research paper, the assignment is to write about the portrayal of injustice in "how the garcia girls lost their accents". ....i have made up a horrible thesis. lol. Can anybody either help me fix it, or if you know the book well,

    asked by Anonymous
  29. Chemistry - Bob Pursley

    Posted by Sarah H on Friday, May 23, 2008 at 8:10pm. Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS = 7O2 --> 2Fe2O3 + 2SO2 Calculate the % yield. My

    asked by Sarah H
  30. Statistics

    Does the null hypothesis for a nondirectional alternative hypothesis differ from the null hypothesis for a directional alternative hypothesis? Explain. I have no idea how to state the answer for this.

    asked by Christine
  31. Physics

    I'm doing a report on my experiment right now where you had to test out the voltage and current of 2 resisters and a light globe with an ammeter and voltmeter. We had to graph the results, and the reisistors had a linear relationship between voltage and

    asked by TP
  32. ecology

    what are some of the abiotic factors of the coelacanth fish

    asked by bentley
  33. Math

    Two Planes leave an airport at the same time, one flying 300km/h and the other at 420km/h The angle between their flight paths is 75 degrees after three hours, how fart apart are they? answer: so it would be c^2=a^2+b^2-2ab cos C

    asked by Tareena-- drwls check my answer please
  34. Math

    a traingle has an area 48 square cm and its shorter sides have lengths 9cm and 12cm. find the lagest angle of the traingle.

    asked by Tareena
  35. sociology

    What measurements do sociologist use to calculate prejudice?

    asked by Paul
  36. Science

    I have to research about Francisco Redi's Spontaneous Generation. I am having a hard time finding info. about it and how he did the experiment. I have found a little bit but not enough. I was wondering if someone could help me find info. about it. Also I

    asked by Amanda
  37. physics

    At 08:00hrs a 2.0- m-long vertical stick in air casts a shadow 1.8 m long. If the same stick is placed at 08:00hrs in air in a flat bottomed pool of salt water half the height of the stick, how long is the shadow on the floor of the pool? (For this pool, n

    asked by help?
  38. physics

    A laser beam enters a .125 m thick glass window at an angle of 39° (from the normal). The index of refraction of the glass is 1.46. At what angle from the normal does the beam travel through the glass? that answer is 25.53 deg the second part asks How

    asked by help?
  39. History

    How did the Cold War affect Turkey? :)

    asked by Abby
  40. Amanda

    For Francisco Redi's Spontaneous Generation. Which would be considered the control group of the experiment and which would be the variable group? The jars that were sealed shut and the jars that were left open. which is which? Thanks

    asked by Science
  41. Math

    The Captain of a freighter 8km fromthe nearer of two unloading docks on the shore finds that the angle between the lines of sight to the docks is 35 degrees. if the docks are 10km apart, how far is the tanker from the farther dock? My answers : idont know

    asked by Tareena-- check my answer please
  42. chem

    what is the common name for ethane and propene? I think propene is propylene but i don't know about ethane.

    asked by Sarah H
  43. science

    I don't understand what this question is asking (what does it mean by physiology) Explain the physiology of sickle cell anemia.

    asked by kate
  44. MATH

    The Captain of a freighter 8km fromthe nearer of two unloading docks on the shore finds that the angle between the lines of sight to the docks is 35 degrees. if the docks are 10km apart, how far is the tanker from the farther dock? The Captain of a

    asked by T
  45. History

    Hi again, thank you for your help on Nellie McClung, the sites were great. Here's another question; for my culminating activity i have to write an argumentative essay on Women's Rights featuring four events but i only have 1 event in 1918 when women got

    asked by Sabrina
  46. trig

    using the unit circle evaluate cos and sin for 30

    asked by kim
  47. math

    if p has coordinates (x, y) and is located on the unit circle, what is the highest value that the x-coordinate can take? Hence, what is the largest value that the cosine of an angle can take?

    asked by kim
  48. physics

    1. A 70 kg uniform 4.0 m long beam is attached to a vertical wall and is supported by a wire. The beam makes an angle of 45 degrees with the horizontal and the wire is horizontal. The horizontal component of the force that the wall exerts on the lower end

    asked by Sandhya
  49. geography/history

    who discovered the arctic circle

    asked by dillon
  50. physics

    By what length is a light ray displaced after passing through a 4.7 cm thick sheet of material (n=1.38) with an incident angle of theta = 33.5°.

    asked by help?
  51. physics

    An object whose height is 3.5 cm is at a distance of 8.5 cm from a spherical concave mirror. Its image is real and has a height of 11.2 cm. Calculate the radius of curvature of the mirror. How far from the mirror is it necessary to place the above object

    asked by help?
  52. Math

    Need help I have to find a pattern for 8, -1, 2, -1 I know the answer is 1/3 but have no idea how I get there...I am trying to multiply each by -1/2 but I can't get the 1/3 at the end for some reason and I have the similar problem as well: 8, -4, 2, -1

    asked by Maggie
  53. social studies

    Land higher than the land around it?

    asked by Gino Bicardi
  54. Psychololgy

    I have to trace the memory system from stimuli into long term memory and I'm having trouble finding information to help me with that. Can anyone help?

    asked by Lynn
  55. Religion Exam

    I am trying to find online materials such as old exams that I can use to prepare for my religion exam. I am looking for ones that are non-PDF, as my computer can't open PDF files.

    asked by Anonymous
  56. Algebra

    Approximate square root of 12 by giving the two whole numbers that it lies between.

    asked by Mary
  57. Anthropology

    Instructions: create a chart of Pre history by arranging the characteristics listed below into the cultural periods of Prehistory, oldest at the bottom and most recent at the top, as follows: Lower Paleolithic at the bottom, then middle Paleolithic, upper

    asked by Roseline
  58. English Grammar

    What is the definition of 'two-word verb"? Would you name two-word verbs?

    asked by John
  59. Latin

    1.'hic Danaos ad tecta ruentes 2.cernimus,obsessumque acta testudine limen. 3.haerent parietibus scalae;postesque sub ipsos 4.nituntur gradibus,clipeosque ad tela sinistris 5.protecti obiciunt,prensant fastigia dextris. 6.Dardanidae contra turres ac tecta

    asked by Anonymous
  60. health

    Identify and describe three causes for the increasing costs of health care

    asked by Pete
  61. Macroeconomics

    Assume that preferencse are given by u(c,L) = 2*ln(c) +ln(L). The wage rate is $15 and the person has 120 hours of time available. Profits are 0. Taxes are 0. Write down two equations that describe the constraints faced by this consumer. Find an equation

    asked by Kayla
  62. Algebra

    Which two triangles are similar? 48,69 Degrees, 48, 63 Degrees and 78, 63 degrees.

    asked by Bernie
  63. Math

    The Captain of a freighter 8km fromthe nearer of two unloading docks on the shore finds that the angle between the lines of sight to the docks is 35 degrees. if the docks are 10km apart, how far is the tanker from the farther dock? The Captain of a

    asked by Tareena-- check my answer please
  64. Algebra

    Is 5 the answer to : y < -3

    asked by Ashley
  65. History

    Hi there, for my history assignment i must prove how Nellie McClung was the greatest Canadian. Could you point me to any videos, clips on the internet or great sites that will be to my assistance. Your efforts are greatly appreciated. -Thanks

    asked by Sabrina
  66. Statistics - Excel

    Can anyone help me with finding Standard Deviation in Excel? I have about 20 entries of different house prices, and I need to find the standard deviation. I know you had to enter something like 'SDEV=" but I can't remember.

    asked by TP
  67. maths - series

    U1=3 (take them both into consideration) Un+1=Un /2 List the first five terms, and if possible, describe the type of progression

    asked by Anonymous
  68. Math

    64 is 8% of what number?

    asked by Nenny
  69. business ethics

    Does affirmative action programs, reverse discrimination and criteria of comparable are appropriate remedies of discrimination in a work atmosphere?

    asked by guest
  70. science

    Name a dried vegetable whose inside is used to scrub our bodies while bathing

    asked by Ashita
  71. English Grammar

    The record shop is across from KFC. The record shop is across from the KFC. The record shop is across from a KFC. Which expression is grammatical?

    asked by John