Questions Asked on
March 22, 2014

  1. Chemistry

    Complete and balance the equation for this reaction in basic solution? Redox reaction Cr is oxidized to CrO42– and Fe3 is reduced to Fe2...? For a particular redox reaction Cr is oxidized to CrO42– and Fe3 is reduced to Fe2 . Complete and balance the

    asked by Mia
  2. Math

    Suppose that Ramos contributes $6000/year into a traditional IRA earning interest at the rate of 2%/year compounded annually, every year after 35 until his retirement age at age 65. At the same time, his wife Vanessa deposits $4900/year into a Roth IRA

    asked by Dee
  3. math

    solve the equation 5coshx + 3sinhx = 4

    asked by Alice
  4. Physics

    Consider two diffraction gratings. One grating has 3000 lines per cm, and the other one has 6000 lines per cm. Both gratings are illuminated with a beam of the same monochromatic light. Which grating produces the greater dispersion? Both gratings produce

    asked by Anonymous
  5. Urgent Chemistry

    The Heisenberg Uncertainty Principle: A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of mm = 0.100fg\rm fg (where a femtogram, fg\rm fg, is 10−15g\rm 10^{-15}\; g) and is swimming at a velocity of vv =

    asked by Anna
  6. Chemistry

    an extremely soluable salt is added to water, and all of it dissolves. is it at equilibrium? explin.

    asked by Anonymous
  7. chemistry

    calculate the freezing point of an aqueous solution of 15.5 grams of glucose dissolved in 150 grams of water

    asked by Sara
  8. physics

    A 2400 kg car moving at 11 m/s crashes into a tree and stops in 0.26 s. calculate the force the seat belt exerts on passenger in the car to bring him to a halt the mass of the passenger is 72 kg.

    asked by Mohanad
  9. college physics 2

    A double-slit diffraction pattern is formed on a distant screen. If the separation between the slits decreases, what happens to the distance between interference fringes? Assume the angles involved remain small. A double-slit diffraction pattern is formed

    asked by Anonymous
  10. physics

    In a double-slit experiment, two beams of coherent light traveling different paths arrive on a screen some distance away. What is the path difference between the two waves corresponding to the third bright band out from the central bright band? The path

    asked by Anonymous
  11. Calculus

    A rancher wants to build a rectangular fence next to a river, using 100 yd of fencing. What dimensions of the rectangle will maximize the area? What is the maximum area? (Note that the rancher should not fence the side next to the river.)

    asked by Anonymous
  12. BIOLOGY

    Which of the following statements is NOT true about gamete formation in mammals? a)In the female, the separation of cytoplasm is unequal during meiosis. b)Only one of the four cells resulting from meiosis goes on to become an oocyte. c)Only one of the four

    asked by TEESHAN
  13. Math

    If salesman earned a 6% commission on sales, and in one week he earned $300 in commissions, how much merchandise did he sell that week?

    asked by Rayne
  14. Chemistry

    When 24g of Magnesium reacts with oxygen gas the only product is magnesium oxide. If 40g magnesuim is produced how much oxygen was consumed?

    asked by Loren
  15. Algebra

    The number of visitors at a Web site over several days is shown in the table at the right. What is an equation that models the data? This is the given data: Days: 1, 2, 3, 4, 5 Visitors: 52, 197, 447, 805, 1270 How do you write the equation?

    asked by Anonymous
  16. statistics

    opinion polls find that 16 percent of americans adults claim that they never have time to relax. suppose you take a random sample of 400 american adults and count the number X in your sample and claim that they never never have time to relax.

    asked by kristina
  17. Biology

    Does it matter which strand is the 'code strand'? The following two sequences look identical, except one runs 3'-5' and the other 5'-3'. For each DNA sequence given below, write the mRNA sequence that would be coded from it. Make sure you indicate the

    asked by Danielle
  18. Behavior

    Animal researchers refer to the process of filtering out sights, scents, and sounds that have little impact on survival as A. desensitizing. B. nurturing. C. aggression. D. habituation

    asked by Kathy
  19. Chemistry - check answers

    1) Which element has the largest first ionization energy? A) Rb, B) Fr, C) K, D) Na, E) Mg Answer: E 2) Which has the highest electronegativity? A) Na, B) Cs, C) Si, D) Te, E) Cl Answer: E 3) In which of the following are the bonds arranged in order of

    asked by Amanda
  20. Chemistry

    1.350g of insoluble carbonate, MCO3 was dissolved in 250cm^3 of a 0.203 mol/dm^3 HCL solution. The resulting solution was boiled off to remove all carbon dioxide produced. 25.0 cm^3 of the solution required 24.10cm^3 of 0.100 mol/dm^3 sodium hydroxide

    asked by Ellen Cameron
  21. Chemistry

    The decomposition of hydrogen iodide on a gold surface at 150 oC HI(g) ½ H2(g) + ½ I2(g) is zero order in HI. In one experiment, when the initial concentration of HI was 0.206 M, the concentration of HI dropped to 3.71E-2 M after 898 seconds had passed.

    asked by kait
  22. Math

    solving applied problems two equations (Coles two student loans totaled $31,000. One of his loans was at 2.8% simple interest and the other at 4.5%. After one year, Cole owed $1024.40 in interest. What was the amount of each loan?)

    asked by Chris
  23. maths

    What is 9x²+3x-2=0

    asked by y
  24. Physics

    A single-slit diffraction pattern is formed on a distant screen. If the width of the single slit through which light passes is reduced, what happens to the width of the central bright fringe? Assume the angles involved remain small. The central bright

    asked by Anonymous
  25. Math (help)

    Nikki made 2 gallons of punch with fruit juice and ginger ale. The recipe requires 1 gallons of ginger ale. What percent of the total recipe is fruit juice? A- 50% B- 33 1/3% C- 25% D- 10% I got 50% because u need 1/2 more but the answer is 25 please

    asked by May
  26. Chemistry

    The decomposition of hydrogen iodide on a gold surface at 150 oC HI(g) ½ H2(g) + ½ I2(g) is zero order in HI with a rate constant of 1.20E-4 Ms-1. If the initial concentration of HI is 0.575 M, the concentration of HI will be 0.116 M after how many

    asked by kait
  27. Calculus

    A ball is thrown vertically upward with an initial velocity of 135 feet per second, the ball’s height after t second is s(t) = 135t – 22t How to calculate average velocity from 1 to 3 seconds?

    asked by Zack
  28. language arts

    rewrite each sentence, adding commas where needed. which i was researching skateboards i found an interesting old newspaper story?

    asked by james
  29. Chemistry

    The decomposition of hydrogen iodide on a gold surface at 150 oC HI(g) ½ H2(g) + ½ I2(g) is zero order in HI with a rate constant of 1.20E-4 Ms-1. If the initial concentration of HI is 0.575 M, the concentration of HI will be 0.116 M after seconds have

    asked by kait
  30. Math

    Write an equation to model the data. x: 0,1,2,3,4 y: 0,2.8,11.2,25.2,44.8 How do you do this?

    asked by Anonymous
  31. Biomechanics

    Flexion of the elbow and supination of the forearm occur about what axes respectively?

    asked by Evelyn
  32. Biology

    For the DNA sequence given below, write the complementary DNA sequence that would compliment the double-strand DNA 3'--ATTGCTTACTTGCATGGTACCTCTAGCGTTTAGGC--5'

    asked by Danielle
  33. life orientation

    Identify 3 study fields/paths in order of preference and provide two reasons for each choice

    asked by cynthia
  34. Biology

    The integumentary system includes • skin only** • hair only • nails only • skin, hair, and nails Is my answer correct? the **

    asked by Sandra
  35. human biology cardiology

    A flow of blood directly from the right atrium to left atrium is a dangerous complication of certain heart abnormalities. It can lead to cyanosis. What do you know about the flow of blood through the heart and lungs that would explain this? Yes, I do know

    asked by Samarkand
  36. PHYSICS

    A plane flying horizontally at 180 m/s drops a box just as it crosses a coastline. The box lands 3 kilometers from the coast. - At what height is the plane flying? - How long it takes to the box to reach the ground ?

    asked by LEZA91
  37. Biology

    Read the DNA sequence given below in the 3' to 5' direction and please tell me all of the potential start codons (i.e. every time you see the DNA version of a start codon, even if it does not immediately come after a promoter).

    asked by Danielle
  38. chemistry

    Calculate the molar conc. Of ethanoate acid needed to prepare ethonoic buffer of ph 6.8 using 0.5 molar solution of sodium ethanoic.pka of acid 0..127

    asked by Anonymous
  39. Expositon: How-to Essay

    I have been assigned to write an how-to essay that consists of 3 paragraphs. Should I number each paragraph?

    asked by Anonymous
  40. statistics

    The highest point in the scatter is the point for Illinois, at 1807. The two just below it, at 1778 and 1777, are for Minnesota and Iowa. The lowest points are at 1391 and 1385, for Maine and D.C. respectively. Pick all the options that are correct. The

    asked by keitanako
  41. PLG 209

    Summarize the Bill of Rights (and Amendments 13-15). Discuss why they apply to criminal law

    asked by Anonymous
  42. math

    regular selling price of A is 100. promo price of A is 85. New special price offered for A is 75. What will be the discount % of A

    asked by Anonymous
  43. Reading

    "Did you read his analysis in Sparknotes? What have you found about him by reading this novel? " he tries to see the good in everyone and never the bad he defends Tom Robinson Atticus practices the ethic of sympathy and understanding that he preaches to

    asked by anonymous
  44. math

    Jessica earns $53.35 in 5.5 hours. How much does Jessica earn in 1 hour?

    asked by kathy
  45. Science

    a layer of ice has an area of 35m2 and is 2.5cm thick and is -7.5'c. how much water (in kilograms) is needed to melt the ice?

    asked by Walter
  46. Accounting 205

    help with paper on basic transaction processing fr Richard Simmons

    asked by Gail
  47. science

    an object being pulled to earth by gravity will have the force of air pushing back opposite directions

    asked by james
  48. Biology

    (This question ties into the previous question I posted about mRNA). Use the Universal triplet code to determine the sequence of amino acids that would be generated for each of the mRNA sequences that you generated in question 2. Remember that the reading

    asked by Danielle
  49. Biology

    What 3' to 5' DNA sequence would correspond to a 5'-AUG-3' start codon?

    asked by Danielle
  50. Statisics

    4. The purpose of the investigation was to examine the effects of the Tweed edgewise technique on mandibular growth and rotation. It employed 36 Class II Tweed edgewise patients, all of whom had 4 bicuspids extracted during the course of treatment.

    asked by Daniya
  51. Physic II

    Why would you expect a plate to hold more excess charge on each of its conducting surfaces when the voltage difference between the two pieces of conductor increases?

    asked by ggulnebe
  52. focus high school

    What percentage of all infertile American women are infertile because of tubal damage caused by untreated STD?

    asked by Anonymous
  53. science

    what is the substance that melts at 10°C?

    asked by lusika tangoi
  54. Math

    Solve the system using elimination. y = -x + 3 y = x^2 + 1

    asked by Anonymous
  55. Math

    Doublets? Change one word to another word one letter at a time. Create linking words. DINNER serve COFFEE. Has anybody got a clue how to do this? You have to end with the word coffee? Any help would me much appreciated. Thank You

    asked by T J
  56. Math

    Thanks Steve, but can anyone else help? Start with the word dinner change one letter at a time to form new until you have the word coffee Thank soooooooo much to everybody.

    asked by T J
  57. Calculus Help Please!!!

    find y' and y” by implicit differentiation. 2x^3 + 3y^3 = 8

    asked by Tenshi
  58. english

    What are some websites that are against animal abuse & the actions they have taken to stop it. Thank you!

    asked by Anonymous
  59. Math

    -7x + 9y = -29 8x + 5y = -28

    asked by Chris
  60. Math

    What is 66 2/3 of 39?

    asked by Rayne
  61. math

    if f(x)=1-3x and g(x)=x^2-1, find : g(g(x)), and g(f(x))

    asked by Alice
  62. math

    if f(x)=1-3x and g(x)=x^2-1, find : f(g(x))

    asked by Alice