# Mohamed

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?

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

3. ## chemistry

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

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

5. ## Science

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

6. ## Math

If x+ay=b, then y equals

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)

8. ## chemical equilibrium

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

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?

10. ## HOME,ECONOMICS

CAREERS,IN,HOME,ECONOMICS

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

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

13. ## chemistry

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

14. ## english

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

15. ## math

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

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

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

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

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)

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.

21. ## History

Way was olympia selected to hold at the ancient olympic game

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

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?

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.

25. ## accounting and finance

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

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

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

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?

29. ## Early childhood

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

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.

3y^2-5y+2=0

32. ## grammar

If you try hard enough, you will surely succeed.

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??

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

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

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

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

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

39. ## Calculas

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

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

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

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?

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?

44. ## Science(chemistry)

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

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

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.

47. ## Math

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

48. ## Calculas

(6x^3-8x^2-6x)/(3-11x-8x^3)

49. ## physics

formular for looking maximum speed reached

50. ## Math

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

51. ## religion

a muslim traveler

gcf of 8/5

53. ## n/a

2cos^2 theta/3-1

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

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

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.

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?

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)

1. ## finance

14.10

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

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

kills

posted on March 23, 2018
12. ## Math

sqer

posted on January 31, 2018

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

1210

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

352.4285714286

posted on July 14, 2016
18. ## accounting

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

0.21

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!!

(-30,20)

posted on April 30, 2014
31. ## Math

3/8

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

1000000

posted on December 10, 2012

gpa?????

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

grammar

posted on September 2, 2012