Anya

Popular questions and responses by Anya
1. Chemistry

determine the pH of a 0.116 M Ba(OH)2 solution at 25 degrees C. i keep getting 13.06 for this answer, but the answer is 13.37 :S what i do is i take the negative log of the concentration which is 0.9355 which is pOH. i know that pH = 14 - pOH so i get pH =

2. chemistry - exam practice help!!

Given the table below predict the numerical value of the standard cell potential for the reaction: 2 Cr(s) + 3 Cu2+(aq) 2 Cr3+(aq) + 3 Cu(s) Half Reaction E (volts) (1) Cr3+ + 3 e- Cr E= -0.74 (2) Cr3+ + e- Cr2+ E=-0.41 (3) Cr2O72- + 14 H+ + 6 e- 2 Cr3+ +

3. FOCUS

Do you know a website that helps you with mind-benders?

4. Calculus

Evaluate the limit, if it exists. (If an answer does not exist, enter DNE.) lim t^2-64/2t^2+17t+8 t→−8 Please show steps!

5. Math

Deceleration uniformly, a car traveling 25 m/s takes 10 seconds to come to a complete stop. What is the magnitude and direction of the car's acceleration as it slows down? North at 2.5 m/s (2) South at 2.5 m/s (2) North at 9.8 m/s (2) South at 25 m/s

6. chemistry - exam practice help!!

i'm not exactly sure how to do this question :/ i don't even know where to start. "Determine the equilibrium [F-] of the following solution with initial concentrations od [HF]= 1.296 M and [NaF] = 1,045 M (ka for HF is 6.6 * 10 ^ -4) options are a) 1.046

7. physics- TEST TMRW PLS HELP!

Why is the following situation impossible? A librarian lifts a book from the ground to a high shelf, doing 20.0 J of work in the lifting process. As he turns his back, the book falls off the shelf back to the ground. The gravitational force from the Earth

8. Math

What is 179 divided by 8 in 4th grade term? Also I have to do it in long division so I need help with that to!! Thx bye

9. History- check my essay!

Can someone tell me what they think of what I wrote? Here is the question and my answer: (This homework question was removed due to a copyright claim submitted by K12 Inc.) Answer: Winston Churchill, a strong leader who told it like it was. He was a true

10. math

What is the median? 2,2,2,2,2,2,3,3,3,3,3,4,4,4 I think it's 3.

11. Chemistry

Given the following chemical reaction what is the bond enthalpy of OH 4NH3 3O2 yields 2N2 6H20 Change H 1266 kJ NH equals 389 O O equals 498 and N N equals 941 3

12. chemistry - exam practice help!!

For the cell shown below, which will increase the cell voltage the most? Fe2+ | Fe3+ || Cu2+ | Cu A) Halve[Cu2+] B) Double[Cu2+] C) Double[Fe2+] D) Halve[Fe2+] E) Cut Cu electrode in half ... Ecell = E0 cell + 0.059/n * log([Cu+]/[Fe2+]) Ecell is directly

13. Chemistry

How do “chemical” salts form? Thank you in advance.

14. math

i am wonder how to do divsion

15. Science

Does anyone know where to find facts about iced tea powder? ex. who made it, where did it come from, anything!

16. social studies

What are all the landforms shared by the US and Caada? I have the Rocky Mountains and the Great Plains. Are those all of them?

17. social studies

What were the 5 scientific discoveries of the Industrial Revolution? I already hae the steam engine and a boat powered by the steam engine.

18. math

There are 6 tight ends in the Hall of Fame. How many different combinations of 2 of those players could possibly be selected for an all-time team? What is the probability that a random selection of 2 tigh ends would be the same 2 chosen for the team?

19. math

There are 6 tight ends in the Hall of Fame. How many different combinations of 2 of those players could possibly be selected for an all-time team? What is the probability that a random selection of 2 tigh ends would be the same 2 chosen for te team?

20. Math

Deceleration uniformly, a car traveling 25 m/s takes 10 seconds to come to a complete stop. What is the magnitude and direction of the car's acceleration as it slows down? North at 2.5 m/s (2) South at 2.5 m/s (2) North at 9.8 m/s (2) South at 25 m/s

21. Science

A box that is initially at rest is pushed by a person at an angle 0 with a force F until it reaches a speed of v. The coefficient of kinetic friction between the box and the surface is U. Is this: work done by person equal to magnitude of friction F work

22. Chemistry

Is this done right? White phosphorous, P4, spontaneously bursts into flame in Oxygen gas. if 6.5 g of white phosphorous reacts completely with oxygen to form 11.54g of a phosphorous oxide, what is the empirical formula of this oxide? this is what i did:

Why is the following situation impossible? A librarian lifts a book from the ground to a high shelf, doing 20.0 J of work in the lifting process. As he turns his back, the book falls off the shelf back to the ground. The gravitational force from the Earth

24. Chemistry

What are three common types of products produced by reactions that occur in aqueous solutions? (out of the following) -gases -water -electrons -precipitates -acids -ions -bases

25. Chemistry

What does the reaction of alkaline earth metals with water tell you? Thanks in advance.

26. Chemistry

When hydrogen reacts with a metal, does it form a cation or an anion?

27. calculus

Boat A leaves the dock at 12pm heading due South at a constant speed of 20 km/h. Meanwhile, at 12pm Boat B, a pirate ship, is 15 km due West of the dock where boat A started, and is sailing due East at a constant speed of 15 km/h. If the pirates get within

28. physics

If you walk at 1 m/s down the aisle of a bus that is moving at 10 m/s along the road, how fast are you moving relative to the road when you walk toward the front of the bus? Toward the rear of the bus?

29. Language Arts

What are the other forms of the word, 'reap'. I only found reaps and reaped.

30. Science

Which of the following contain water that is easily available for human use? (more than one answer) Icecaps & glaciers - 76% of fresh water Shallow Groundwater- 12% of fresh water Deep Groundwater - 11% of fresh water Lakes & Rivers - 0.34% of fresh water

31. psychology

In social psychology, attributional processes refer to: deciding whether behavior is due to the person or the situation. spreading responsibility among a group of people. following the command of an authority figure. choosing sides during a competition or

32. FOCUS

We need to find out what my family's 'coat of arms' is. Could you tell me a website for me to find it?

33. grammar

What does prejude mean?

34. Physics

The lowest temperature ever recorded in Alaska is-6 C. The highest temperature ever recorded in Alaska is 38°C. Suppose a piece of metal with a mass of 180 g and a temperature of -62.0°C is placed in a calorimeter containing 0.500 kg of water with a

35. math

my mom's class is taking a field trip to the science museum there are 23 students in class and a students admission tickets is 8 how much will the students tickets costs

36. math

amy wants to travel from elmtown to lakeside at an average speed of 50 miles/hour. she travels half the distance and discovers that her average speed has been only 25 miles/hour. how fast must she drive for the remaining part of the trip if she is to

37. Math

11.4m of rope he want to divide it into equal pieces how many peace will there be 1.4 m long

I have difficulties understanding physical science and I'd really appreciate it if someone would check over the answers of my practice quiz. I have a test coming up and I really don't want to fail it. I marked my answers with a ******. Thank you in

39. Physics

1 g/cm^3 = _________ kg/m^3 I tried converting g to kg and then cm to m, and then dividing. I get the answer 1x10^(-1). When I type in this problem on the internet, many sources say it is 1000. I am very confused as to how this answer was reached.

40. physics

A particle starts from the origin with a velocity of 6.0 i m/s and moves in the xy plane with a constant acceleration of (-2.0i + 4.0j)m/s^2 . at he instant the particle achieves maximum positive x-coordinate, how far is it from the origin?

41. physics- TEST TMRW PLS HELP!

how would i do this? -----------------A-----------B-------- Illl a carpenter carries a 6kg board . the downward force he feels on his shoulder (A) is .... ? (B is where his hand is) pls help!! i have so much difficulty with these questions!!!

42. physics- TEST TMRW PLS HELP!

w w w . m e d i a . c h e g g c d n . c o m / m e d i a / a c 3 / a c 3 b b 1 e 1 - 5 b a 8 - 4 1 9 e - 9 a 8 4 -a d 5 0 e 4 6 a 2 9 4 e / p h p s U O o L 3 .p n g (delete all spaces for link to work) Determine the magnitude of the resultant moment

43. physics

pls explain this to me ? "momentum is inertia....but inertia is NOT momentum" :S confused

44. Chemistry

Why is the formula for sodium nitrate NaNO3?

45. Chemistry

Why is the use of tin limited?

A runner whose initial speed is 29 km/hr increases her speed to 31 km/hr in order to win a race. If the runner takes 0.5 seconds to complete this increase in speed, what is her acceleration? I think it's either 1440 km/hr/hr or 0.4 km/hr/sec. Are you

47. physics

a golf ball is hit off a tee witha speed of 50m/s at an angle of 37 degrees above the horizontal. At what two values of x (horizontal distance from the tee) will the ball be 25m above the ground?

48. physics

a golf ball is hit off a tee witha speed of 50m/s at an angle of 37 degrees above the horizontal. At what two values of x (horizontal distance from the tee) will the ball be 25m above the ground?

49. social studies

What would be the dangers of working in a factory like the Highland Park Plant in Henry Ford's time?

50. HISTORY

I believe that the boundaries I created for nations of the Middle East would be a force for cooperation rather than conflict because...

51. Calculus

Express the limit as a definite integral on the given integral, [5pi,3pi]. limit notation: cos(xi)/xi

52. Language Arts

Are these real words? surfeitly surfeitness surfeitous

53. Language Arts

I have to do some research of the poor in the Victorian Era. These are some things that I have to look for: 1. What kinds of programs were in existence to help the poor? 2. What was a poorhouse? 3. What was Debtor's prison? 4. Why were the poor, poor? Are

54. Science

Are there any interesting facts on estuaries?

55. math

At the Whistlestop Cafe, 15 of the 19 patrons are mechanics. If a sample of 8 is taken, what is the probability that exactly 5 patrons are mechanics? Round your answer to 4 decimal places.

56. math

At the Whistlestop Cafe, 15 of the 19 patrons are mechanics. If a sample of 8 is taken, what is the probability that exactly 5 patrons are mechanics? Round your answer to 4 decimal places.

57. Social Studies cont.

Explain a very negative outcome of these explorations.

58. Social Studies

Prince Henry had a school for sailors and for the advancement of navigation. Where did he send ships?

59. Language Arts

Is obscured a verb, adjective, or both?

60. Language Arts

What is the pronunciation of unsavory?

61. Language Arts

Does anyone know a website that tells you other forms of a word? Ex. run - ran, running

62. Social Studies

What is the definition of cowhead? I can't find it anywhere! (this word is in my social studies text book)

63. art

why do you have so many math questions.

64. social studies

Who is Canada's largest trading partner in the Wester Hemisphere? I think it's the US.

65. math

Prove the validity of cross products by example/words. (Why does it work as a strategy?) Is this right?: One way to find out whether ratios are equal, is to find a common denominator. Ratios are equal if their numerator and denominator are equal. It is a

66. math

My math teacher gave me this problem: Prove the validity of cross products by example/words. (Why does it work as a strategy?) What is validity???

67. Language Arts

What are the definitions for rudimentarily and rudimentariness?

68. Language Arts

What is a good website where I can find the pronunciation of stratified?

69. Math

I have to factor this equation, which is a perfect square: 2p^2+4p+1 How do I do this?

70. social studies

What are two more names for a market economy? I only have free enterprise.

71. social studies

What is an economic barrier? I don't know how to explain this. All I know is that 3 examples are: embargo, tariff, and quota.

72. social studies

Put each word into a meaningful sentence. Tariff, quota, supply, demand, currency, entrepreneur, human capita, capital goods, gross domestic product. Thank you1 :)

73. math

What is a good word problem for the following expression? 3(m+4)

74. Language Arts

Simile, Idiom , or Both? He is sweatng like a pig

75. social studies

What is Nazism and how was it able to gain popularity in Germany after WWI?

76. Language Arts

Does anyone know a website where I can find the setting, characters (and so on) in a book called Cam's Quest?

77. Language Arts

Does anyone know a website where I can find the setting, characters (and so on) in a book called Cam's Quest?

78. social studies

Can anyone show me a website that shows the Portuguese, Spansh, English, French and Dutch empires in the 1800s?

79. social studies

List the people from most powerful to least: Kings, serfs, tenants, vassals I chose: kings, vassals, tenants, and then serfs.

80. Math

Find the largest angle for which sine and tangent agree to within two significant figures. Express your answer using two significant figures. Answer in radians ?_?

81. vocabulary

Does this sentence make sense? "She was so happy and grateful that I felt more than recompense for all that I had tried to do to help her."

82. plants

Could someone give me a website on how to cure poison oak, fast?!

83. social studies

What are some names of Polish construction workers?

I need to write 3 paragraphs, 5 sentences each (at least on how stone is useful. Could anyone give me some topics?

85. science

Fish- Amphibian- Mammal- Magma- Lava- Earthquake- Tectonic Plates- Ring of Fire- Tsunami- Tide- Could you please give me the definitions in science terms?

87. spelling

Could some one give me a website or 5 words that are compound and have 'ack'?

88. poetry

Could you please give me a website with a rhyming dictionary?

We're having our 5th grade recognition soon and we had to write a poem for our program. Our thyme is 'Soaring to New Heights.' I have written a poem and I was hoping for some editing from you. Here is the poem: We're tiny eggs lying inside our nest where

90. social studies

Which state did Rosa Parks refuse to give up her seat

91. spelling

I need at least 25 words that end in less. any help is appreciated!

92. spelling

Fill in the blanks with nouns: adm_r_l , sq_ _rr_l , _l_v_t_r

93. spelling

Could someone give me a list or website with irregular verbs? Thanks!

94. spelling

Write at least 8 words that start with gu and the u is silent. Any help is appreciated!

I have a 'movie' book report and I need some peopie to play parts for Huckleberry Finn. Could you give me a website to find some alive, famous people? (do not need to be actors)

96. current event

Could you give me some websites to find some interesting and appropriate current events (I already have a website called time for kids)

97. writing

My teacher will ask us every day how we're doing. We have to say a synonym for good. I have a couple but I think I need more. There are 25 students in my class, so if some people take some of my words I have back-up ones.

98. science

I'm sorry but I have two question that haven't been answered yet.

99. science

I don't uderstand this: Acetone freezes at 95.35' below 0'C and boils at 56.2'C. At 42'C what state of matter will acetone be? At 84'C?