Popular questions and responses by Mohamed
  1. Chemistry

    What is the pH of 1.0M Na2SO3 (aq)solution at 25C? a) 3.40 b) 6.03 c) 10.60 d) 7.96 e) 10.40 How can I get ph from only the Molarity?

    asked on April 3, 2012
  2. Physics

    You throw a small rock straight up from the edge of a highway bridge that crosses a river. The rock passes you on its way down, 7.00 s after it was thrown. What is the speed of the rock just before it reaches the water 29.0 m below the point where the rock

    asked on January 8, 2016
  3. chemistry

    if you burn 20.2g of hydrogen and produce 1.80x10^2g of water, how much oxygen reacted?

    asked on January 29, 2015
  4. physics

    A spelunker is surveying a cave. She follows a passage 120 m straight west, then 210 m in a direction 45∘ east of south, and then 280 m at 30∘ east of north. After a fourth unmeasured displacement, she finds herself back where she started. A. Use a

    asked on January 9, 2016
  5. Science

    Mg3N2(s) + 6H20 = Mg(OH)2(s) + 2NH3(g) When 2 moles of H20 react How many grams of NH3 are produced ?

    asked on November 21, 2015
  6. Math

    If x+ay=b, then y equals

    asked on December 19, 2015
  7. grammar - conjanction

    Choose the following words to combine these sentence. words: after and till because as but for if when since so though unless until while or 1) The children went home. It was getting dark. 2) The boys were allowed to read books. The teacher was absent. 3)

    asked on April 8, 2014
  8. chemical equilibrium

    Calculate the value of Kc for 4NH3(g) + 3O2(g)= 2N2(g) + 6H2O(l)

    asked on July 9, 2012
  9. Chemistry

    What volume of carbon dioxide is produced when 0.979 mol of calcium carbonate reacts completely according to the following reaction at 0oC and 1 atm? calcium carbonate (s)---> calcium oxide (s) + carbon dioxide (g) Should I use the ideal gas law?

    asked on April 25, 2012


    asked on October 3, 2016
  11. Grammar

    Fill in the blanks with the chosen words. words: after and till because as but for if when since so though unless until while or 1) The children went home. It was getting dark. 2) The boys were allowed to read books. The teacher was absent. 3) Mother told

    asked on April 3, 2014
  12. Chemistry

    1. An aqueous solution contains 0.154 M ascorbic acid (H2C6H6O6) and 0.196 M hydrobromic acid. Calculate the ascorbate (C6H6O62-) ion concentration in this solution. Can you explain how to do this please? thank you. Also if you can is number 2 missing

    asked on April 26, 2012
  13. chemistry

    Calculate the value of Kc for 4NH3(g) + 3O2(g)= 2N2(g) + 6H2O(l)

    asked on July 12, 2012
  14. english

    English is the language of opportunity.why bother to teach indigenous language?

    asked on April 17, 2016
  15. math

    find the volume of the largest right circular cone that can be inscribed in a sphere of radius 7?

    asked on April 26, 2019
  16. math

    Investing inhertance.Norman invested one-half of his inheritance in a CD that had a 10% annoul yield. He lent one-quarter of of his inheritance to his brother -in-law at 12% simple interest. His income from these two investments was $6400 for 1 year. How

    asked on January 29, 2013
  17. Physics

    A woman weighing 500 N stands in an elevator that is traveling upward. At a given instant the speed of the elevator as well as the women is 10m/s and both are decreasing at a rate of 2 m/s2 at that instant the elevator is exerts a force on the woman that

    asked on September 4, 2012
  18. Chemistry

    The decomposition of hydrogen peroxide in solution and in the presence of iodide ion was studied in laboratory, and the following mechanism proposed based on the experimental data. H2O2 + I - = H2O + IO - (slow) H2O2 + IO - = H2O + O2 + I - (fast) Which

    asked on February 24, 2012
  19. Chemistry

    What volume of hydrogen sulfide is required to produce 161 liters of sulfur dioxide according to the following reaction? (All gases are at the same temperature and pressure.) hydrogen sulfide (g) + oxygen (g)----> water (l) + sulfur dioxide (g)

    asked on April 25, 2012
  20. Physics

    A 543-N physics student stands on a bathroom scale in an 805-kg (including the student) elevator that is supported by a cable. As the elevator starts moving, the scale reads 473 N A) Find the magnitude of the acceleration of the elevator.

    asked on January 15, 2016
  21. History

    Way was olympia selected to hold at the ancient olympic game

    asked on December 7, 2019
  22. physics

    A mass m = 17.0 kg is pulled along a horizontal floor with NO friction for a distance d =5.1 m. Then the mass is pulled up an incline that makes an angle è = 30.0° with the horizontal and has a coefficient of kinetic friction ìk = 0.34. The entire time

    asked on October 18, 2012
  23. Chemistry

    How many moles of hydrogen gas are required to react completely with 807 L of ethylene (C2H4) according to the following reaction at 0oC and 1 atm? hydrogen (g) + ethylene (C2H4) (g)---> ethane (C2H6) (g) Should I use the ideal gas law here?

    asked on April 25, 2012
  24. physical

    Baseball of 0.15 kg is thrown upward at an initial velocity of 35 m/s. tow second later a 20 g bullet is fired at 250 m/s into the rising baseball . how high will the combined bullet and baseball rise.

    asked on December 6, 2014
  25. accounting and finance

    find the rate of interest compound semi-annually at which birr 2000 will grow to birr 5000 in 9 years?

    asked on December 27, 2015
  26. Chemistry

    For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a greater extent than

    asked on March 1, 2012
  27. Data communication and Networking

    1. Illustrate the wave forms for data “101001000111010011110100” by using the following modulation techniques: a. 2 bit AM + 1 bit PM b. 2 bit FM + 1 bit AM c. 2 bit PM + 1 bit FM 2. Based on 8 bit ASCII code, illustrate a wave form using any one of

    asked on January 18, 2019
  28. math

    A pair of ordinary jeans at A-Mart costs $50 less than a pair of designer jeans at Enrico's. In fact, you can buy four pairs of A-Mart jeans for less than one pair of Enrico's jeans. What is the price range for a pair of A-Mart jeans?

    asked on January 29, 2013
  29. Early childhood

    Which of the following play centers can be added to the block center?

    asked on October 21, 2019
  30. physics

    for starting from rest and moving in a straight line,runner achieves a velocity of 7m/s in a time of 2 seconds .what is the average acceleration of the runer.

    asked on January 20, 2011
  31. Math


    asked on April 10, 2019
  32. grammar

    If you try hard enough, you will surely succeed.

    asked on April 29, 2014
  33. Chemistry

    A particular reaction has an activation energy of 51.6 kJ/mol-rxn. How much faster is the reaction at 50 oC versus 25 oC? a. 2 times b. 5 times c. 3 times d. half as fast d. 20% as fast I think it would be A??

    asked on February 23, 2012
  34. engineering (logic systems design)

    Two flip-flops are connected as shown below. The delay represents wiring delay between the two clock inputs, which results in clock skew. This can cause possible loss of synchronization. The flip-flop propagation delay from clock to Q is 10 ns < tp < 15

    asked on October 3, 2013
  35. Chemistry

    A + 2 B = C + D describes an elementary reaction, which takes place in a single step. Thus, the rate law must be a) rate = k (A)^2 b) rate = k (B)^2 c) rate = k (A) (B) d) rate = k (A) (B)^2 I think its D because there are 2 moles of B and 1 mole of A. Do

    asked on February 24, 2012
  36. Grammar - INTERJECTION

    Ho, ho! That was a good joke. Good heavens! You won the first price. Oh dear! You should not done that Bravo! You have won the prize. have you spent all your pocket money? Tut-tut! Did you break the cup. Hush! The king is going to speak

    asked on May 12, 2014
  37. chemistry

    if i want to change the pH of any solution from 5 to 8 what the volume of NaOH 0.1 N needed

    asked on March 9, 2011
  38. science

    A light string of length a is attached to two point A and B such that they on the same horizontal level and are separated b apart .A mass of P newton is theaded on the string such that it is vertically below B. show that temsion in string w[a^2+b^2)/2ab

    asked on July 21, 2017
  39. Calculas

    Horizantal limit of (6x^3-8x^2-6x)/(3-11x-8x^3)

    asked on November 7, 2016
  40. Math-Stat

    Jane and Bob are on the same game show. They answer one question, either True or False. The probability that Bob is correct is 70%. The probability that Jane is correct is also 70%. Moreover, the probability that Bob is correct given Jane is either correct

    asked on January 29, 2013
  41. Chemistry

    What is the equilibrium constant for the reaction of ammonium ion with formate ion? I know that the ionization constant for ammonium ion is Ka=5.6e-10 and for formate Kb=5.6e-11. a) 1.0 X 10-13 b) 5.6 X 10-11 c) 3.1 X 10-6 d) 1.8 X 10-5 e) 3.2 X 105 I

    asked on April 3, 2012
  42. Chemistry

    Why is zinc used to coat Iron and not the other way around? Why is Iron not recommended in construction of steam pipes?

    asked on October 19, 2009
  43. science

    A man throws over a cliff and hears it strike at the bottom in 8 second. The temperature is 25 C. what are the two times ; the time that the stone travels and the time that sound travels ? what is the height of the cliff in meters?

    asked on November 25, 2015
  44. Science(chemistry)

    how much energy is needed to change 53 grams of water from -53 degrees celsius to 160 degrees celsius ?

    asked on April 30, 2014
  45. Commercial low

    Michael Van Gough an attorney experienced in real estate transactions and his wife Kimberly were interested in buying certain property being sold by Carol Martin for her former husband Johnny Martin. When Van Gough asked Carol Martin if there had been any

    asked on September 15, 2017
  46. Fluid Mechanics

    the problem says: Water flows from a bathtub through a 2.5 diameter plastic pipe to a large air-filled drain...etc Here, i need to know what is the pressure at the air-filled drain? Is it equal to the atmospheric pressure? Thanks in advance.

    asked on December 21, 2014
  47. Math

    What is the derivative of x - 4/x square. Just the denominator is squared.

    asked on March 21, 2010
  48. Calculas


    asked on November 7, 2016
  49. physics

    formular for looking maximum speed reached

    asked on November 25, 2015
  50. Math

    2^(x+2)-2^(x)=24 ??

    asked on November 10, 2015
  51. religion

    a muslim traveler

    asked on March 8, 2011
  52. math

    gcf of 8/5

    asked on February 23, 2011
  53. n/a

    2cos^2 theta/3-1

    asked on December 5, 2015
  54. Fluid Mechanics

    I have a question in fluid mechanics...and i need to know the pressure in an air-filled drain? Is it the atmospheric pressure? Thanks in advance

    asked on December 21, 2014
  55. English Composition

    Your boss has asked you to investigate the types and uses of social media that might be appropriate in the workplace. In addition, you are also asked to compare and contrast the services and provide a recommendation that would be suitable to your

    asked on October 8, 2014
  56. grammar

    Is this sentence is correct? He wanted to polish his shoes, for it were covered with mud. or else replace it with they.

    asked on April 29, 2014
  57. Math

    soybean mean is 16% protein and corn mean is 9% protein. how many pounds of each should be mixed to get a 350 pound mixture that is 13% protein?

    asked on April 22, 2014
  58. math

    PROCESSING CLAIMS. Joe takes x hours on the average to process a claim. whereas Ellen's average is 1 hour longer. a) write a rational function C(x) that gives the number of claims that they process while working for an 8-hour shift. b) Find C(c)

    asked on April 5, 2013
  1. finance


    posted on February 20, 2020
  2. home economics

    Thanks a lot for given me all my reguested answers

    posted on August 23, 2019
  3. Lo

    Human rights don't occur in my community

    posted on May 9, 2019
  4. Lo

    Human rights

    posted on May 9, 2019
  5. Math

    How we do it?

    posted on May 8, 2019
  6. english

    Motion That Boys Should Not Help In The Kitchen

    posted on October 10, 2018
  7. english

    Reason Why Boys Should Not Help In The Kitchen

    posted on October 10, 2018
  8. 5th grade

    Of course, 4,000 :)

    posted on October 1, 2018
  9. Health

    Using outside references, describe outcomes management and its relationship to fitness. What do you think a mandatory outcomes program would have on rehab and wellness programs in the future? Is it good professionally? Will it raise costs? Provide

    posted on May 29, 2018
  10. General Chemistry

    The correct ans. is (c)

    posted on April 15, 2018
  11. Genetics


    posted on March 23, 2018
  12. Math


    posted on January 31, 2018
  13. Physics help please

    Rutherford Scattering Calculate the impact parameter for scattering a 7.7 MeV alpha particle from gold at an angle of (a) 1 degree and (b) 90 degrees?

    posted on December 16, 2017
  14. algebra

    A distributor lists an item for $85 less 20%. To improve lagging sales, the net price of the item is reduced to $57.80. What additional rate of discount does the distributor offer

    posted on October 6, 2017
  15. Math


    posted on October 6, 2017
  16. Math

    See what 12 and 9 go into (3) 3 goes into 12 4 times 3 goes into 9 3 times take the biggest number and times both of them by that number. 9x4 = 36 12x4 = 48 Take the number 3 goes into and add that number to 9:15am Glad i could help xx

    posted on September 18, 2016
  17. Math: Statistics Least squares line


    posted on July 14, 2016
  18. accounting

    please send me answer

    posted on May 24, 2016
  19. accounting

    P8 -3A

    posted on May 24, 2016
  20. chemristy

    What volume (in liters) would the gas occupy at a pressure of 1.20 atm if its temperature remained unchanged?

    posted on May 4, 2016
  21. World history

    i don't know

    posted on April 15, 2016
  22. Life o

    thank you

    posted on March 14, 2016
  23. college physics


    posted on March 2, 2016
  24. Physics

    ur mom

    posted on January 19, 2016
  25. Physics

    Not correct but thanks anyway

    posted on January 17, 2016
  26. Math 1

    I don't get any pic sorry I didn't

    posted on November 14, 2015
  27. ApWorld history

    Actually this is an interesting topic since it requires looking at the geographic extent of the Arabic language before and after the spread of Islam. Although not every Muslim speaks Arabic today, the geographic extent of the Arabic language being spoken

    posted on November 5, 2015
  28. history

    Cartoon depicting Standard Oil Bill Sikes is a fictional criminal from Charles Dickens’ novel Oliver Twist. How does the rhyme characterize Standard Oil? Write your own rhyme to characterize John D. Rockefeller or one of the industrialists. Your rhyme

    posted on September 1, 2015
  29. physics

    R=sqrt(3^2 + 4^2) =sqrt(9+16) =sqrt(25) =5 N. the two vertical and horizontal forces are basically components of the resultant. Good luck in your studies!

    posted on December 21, 2014
  30. HELP!!


    posted on April 30, 2014
  31. Math


    posted on April 30, 2014
  32. Grammar

    They have not given the blanks

    posted on April 3, 2014
  33. Grammar

    1) Because 2) For 3) As 4) Till 5) when 6) but 7) So 8) But 9) If 10) While Correct the mistakes and re-post it.

    posted on April 3, 2014
  34. optimization

    Suppose you are a fill-dirt contractor and you have been hired to transport 400 yd3 of material across a large river. To transport the material, a container must be constructed. The following cost data are available: Each round trip costs $4.20 and

    posted on January 16, 2014
  35. Math, Finance

    PMT= $2363.1

    posted on November 2, 2013
  36. finance

    If you put up $40,000 today in exchange for a 6.25 percent, 15-year annuity, what will the annual cash flow be?

    posted on June 12, 2013
  37. math

    the answer is none just for the uter number

    posted on May 15, 2013
  38. environment

    I want the answer to 5 ways in which the environmental problem impacts on the commumity

    posted on May 5, 2013
  39. Digit Problems


    posted on December 10, 2012
  40. My Grades


    posted on October 12, 2012
  41. Math

    what is a verbalrepresentation of a decimal number like 0.65

    posted on September 12, 2012
  42. languagesart


    posted on September 2, 2012