1. Chemistry

The voltage generated by the zinc concentration cell described by, Zn(s)|Zn2+ (aq, 0.100 M)||Zn2+ (aq, ____ M)|Zn(s) is 24.0 mV at 25 °C. Calculate the concentration of the Zn2 (aq) ion at the cathode. Hi, I posted this question awhile back but I think it

2. chemistry

Calculate the cell potential for the following reaction as written at 51 degrees C, given that [Zn2+] = 0.837 M and [Sn2+] = 0.0180 M. Zn(s) + Sn^2+(aq) = Zn^2+(aq)+Sn(s) E = __ V Reduction Half-Reaction Standard Potential Ered° (V) Zn2+(aq) + 2e– →

3. Chemistry

A student completes titration by adding 12.0 mL of NaOH(aq) of an unknown concentration to 16.0 mL of 0.15M HCl(aq). what is the molar concentration of the NaOH(aq)?

4. physics

What is the minimum downward force on the box in the figure that will keep it from slipping? The coefficients of static and kinetic friction between the box and the floor are 0.38 and 0.28, respectively.

5. Physics! plese help

A 1320-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Using the data shown in the figure, find (a) the magnitude of the tension in the wire and the

6. math

4. Gregory teaches martial arts. He charges a one-time processing fee of \$5.00 and the cost of the classes is shown below. Let x represent the number of classes and y represent the cost of classes. Based on this information, what will it cost to take 10

7. Physics

Two spherical objects with a mass of 2.88 kg each are placed at a distance of 2.12 m apart. How many electrons need to leave each object so that the net force between them becomes zero?

8. Physics

Pith Balls Two small pith balls, each of mass m = 17.7 g, are suspended from the ceiling of the physics lab by 0.8 m long fine strings and are not moving. If the angle which each string makes with the vertical is è = 42.6°, and the charges on the two

9. physics

a metal ball with a charge of 5.4x10^8 electrons is touched to another metal ball so that all the excess electrons are shared equally. What is the final cahrge on the first ball?

10. English

Does this have paraelle structure Neither pesticides nor hormones are used in the production of organic foods.

11. Physics

Some bacteria are propelled by motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.9x10-8m, and a tangential speed at the rim of 2.5x10-5 m/s. (a) What is the angular speed (the magnitude

12. Physics Equations of Motion

Along a straight road through town, there are three speed-limit signs. They occur in the following order: 66 , 31 , and 19 mi/h, with the 31 -mi/h sign located midway between the other two. Obeying these speed limits, the smallest possible time tA that a

13. Physics

The magnitude of the momentum of a cat is p. What would be the magnitude of the momentum (in terms of p ) of a dog having two times the mass of the cat if it had the same speed as the cat? What would be the magnitude of the momentum (in terms of p ) of a

14. finance

You have finally saved 10,000 and are ready to make your first investment. You have the three following alternatives for investing that money: 1) Captial cities ABC Inc. bonds with a par value of \$1000 that pays an 8.75 percent on its par value in

15. Chemistry.

Calculate the volume of carbon dioxide produced when 0.5 tonnes of iron are produced. When iron oxide is heated with carbon monoxide, pure iron and carbon dioide are formed. Answer: 500000g/112g/mol =?/3 = 13392.9L

ok i have to do a bibliography for nigeria and bolivia. those are both the title of my essays that i have to do. i researched and did everything i could to understand what they mean by a "bibliography" essay. i failed my first essay about bolivia because

A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.44 x 104 rad/s to an angular speed of 5.05 x 104 rad/s. In the process, the bit turns through 1.77 x 104 rad. Assuming a constant angular acceleration, how long would

18. chemistry

Record and calculate the following masses: (a)mass of empty beaker: 47.420g (b)mass of beaker plus Na₂CO₃:47.920g (c)Mass of Na₂CO₃:0.5g (d)mass of beaker plus NaCl:47.438g (e) Mass of NaCl (g):0.018g **I need help with these questions below** 2.

19. chemistry

Consider the system 2N2O5(g) 2N2O4(g) + O2(g) + heat at equilibrium at 25C. If the temperature were raised would the equilibrium be shifted to produce more N2O5 or more N2O4? 1. more N2O4 2. more N2O5 3. There would be no effect.

20. eq

Hanger is to closet as tree is to (A) forest. (B) branch. (C) bird. (D) ground.

21. Physics

An electron moves on a circular orbit in a uniform magnetic field. The strength of the field is 1.00×10-5 tesla. The kinetic energy of the electron is 178.0 eV. (1 eV = 1 electron volt = 1.6 ×10−19 joules.) Calculate the radius of the orbit. (electron

22. physics

a square with side length 2.0 cm has a charge of -1.0x10^-6C at every corner. What is the magnitude and direction of the electric force on each charge? What is the force on a fifth charge placed in the centre of this square? Does the sign of the fifth

23. geometry

LM has the endpoints L(-1,1) and M(-5,-3) find the coordinates of the midpoint of LM

24. math

find the equation that meets the given conditions: a varies directly as the square of r and a=9 pie when r=3

25. Physical Geography

Assume that a parcel of air is forced to rise up and over a 6000-foot-high mountain. The initial temperature of the parcel at sea level is 76.5°F, and the lifting condensation level (LCL) of the parcel is 3000 feet. The DAR is 5.5°F/1000’ and the SAR

26. Algebra

If the trend continued, in how many years would the median home value be \$170,000? Show how obtained your answer using the linear equation you found in part c) Suppose that the width of a rectangle is three feet shorter than length and that the perimeter

27. mba

from a set of 1000 observations known to be normally distributed the mean is 534 cm and sd is 13.5 cm. how many observations are likely to exceed 561 cm, how many will be between 520.5 cm 547.5 cm, between what limits will the middle 50% of the

asked by quantitative analysis for managerial applications
28. calculus (check my work please)

Not sure if it is right, I have check with the answer in the book and a few integral calculators but they seem to get a different answer ∫ sec^3(x)tan^3(x) dx ∫ sec^3(x)tan(x)(sec^2(x)-1) dx ∫ tan(x)sec(x)[sec^4(x)-sec^2(x)] dx ∫

29. Chemistry-stoichiometry ...help!

Calculate the volume of carbon dioxide produced when 0.5 tonnes of iron are produced. When iron oxide is heated with carbon monoxide, pure iron and carbon dioxide are formed. Ans: 500000g/112g/mol= 13392.9L

30. Math

The state of texas covers approxmiately 268,581 squared mi. During a hail storm the entire state is covered in 1billion meters of hail.(average radius of 1.4292cm)assume the hail falls so that the gaps of air are limited to 26% of the volume. As the state

31. Chemistry-stoichiometry ...help!

Calculate the volume of carbon dioxide produced when 0.5 tonnes of iron are produced. When iron oxide is heated with carbon monoxide, pure iron and carbon dioxide are formed. Ans: 500000g/112g/mol= 13392.9L

32. Math C30

An airplane is leaving the first airport (A) at a bearing of 70 degrees. It then travels 238 miles to airport B. After fueling up, it leaves at a bearing of 120 degrees and lands at airport C. After fueling up it finally returns to airport (A) at a bearing

33. English 7 - "Dear Reader" Letter Check

Can you check my letter. It's a project for English. We are making our writing portfolios. I'm almost done I just have to do this. Dear Reader, This year I done some great improvement as a writer. I add great vocabulary in my pieces. When I'm reading, it

34. physics

An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical

35. eq

Desert is to oasis as ocean is to (A) water. (B) sand. (C) sea. (D) island.

36. Physics

An electron travelling in the same direction that an electric field points initially has a speed of 4.21 ×107 meters per second. If the electric field has a magnitude of 2.28 ×104 N/C, how far does the electron travel before stopping?

37. chemistry

aluminum has a density of 27g/cm3 if a chunk of aluminum with a mass of 16g is placed in a graduated cylinder partially filled with water how much will the water level rise

38. Algebra

If the trend for the growth in the median home value continues=d, what would be its value in the year 2007? show how you obtained your answer using the linear equation you found in part c).

39. math

Lawrence was training for a mararthon. He ran 9.59 miles total the first week of training. On the second week of training,he ran 16.58 miles total. How many more miles did he run the second week than his first? tip: It's deciamls subtraction

41. mba

from a set of 1000 observations known to be normally distributed the mean is 534 cm and sd is 13.5 cm. how many observations are likely to exceed 561 cm, how many will be between 520.5 cm 547.5 cm, between what limits will the middle 50% of the

asked by quantitative analysis for managerial applications
42. math

In a hypermarket promotional drive, the customers would only have to pay half of the original price on their second buy of the same item and one quarter of the original price on their third buy of the same item for some selected items. A customer bought 3

A tungsten target is struck by electrons that have been accelerated from rest through a 38.9-kV potential difference. Find the shortest wavelength of the radiation emitted.

44. maths

if alpha and beta are the zeros of the polynomial 2x^2-4x+5 then find the values of (i)alpha^2+beta^2 (ii)1/alpha^2+1/beta^2 (iii)(r)alpha/beta+(r)beta/alpha (iv)alpha^-1+beta^-1

45. math

5/4 times 5

A tungsten target is struck by electrons that have been accelerated from rest through a 38.9-kV potential difference. Find the shortest wavelength of the radiation emitted.

47. Math Algebra Find the Product

(4y+5)(4y-5) 16y^2-20y+20y-25 16y^2-25 Am I correct

48. Geometry

You have a figure with 6 sides. Each side measures 4.3m. What is the perimeter?

49. Health care

Which has a greater influence on a person’s health: individual choices and actions (micro perspective) or community policies and resource availability (macro perspective)?

50. Capstone Accounting

Assessment of the strategic fit between Square D and Schneider. What are the pros and cons of a combination?

51. Physics

Distance DC = FE = HG = AB = 2.7m FH = FD = GE = EC = CB = 2 m Find the supporting reaction of H, Member BD (Tension Force), Member CE, and Member CF? Figure Links: freeimagehosting 72dje

52. Chemistry

What is the molarity of a solution prepared by dissolving 2 moles of BaCl2 in enough water to make a 4.0 L solution? M= mols/L a. 0.5 M b. 8.5 M c. 17.1 M

53. DeskToping

_____ are symbols used to indicate changes that need tobe made to text. A. Proofreaders marks B. Correction Marks C. Insertion Marks D. Preview symbols I got A.

54. Math

15) Marissa is 3 years older than her younger brother. Her older brother is twice as old as her younger brother. Her older brother is 18. How old are Marissa and her younger brother?

55. Math

a farmer wants to fence in part of her land so that her chickens will have thier own little area. if she only has 28 feet of fence, what is the area of the largest pen that she can build?

56. physics

Explain how an object can orbit a planet & why astronauts float around in the orbiting space shuttle

57. mba

from a set of 1000 observations known to be normally distributed the mean is 534 cm and sd is 13.5 cm. how many observations are likely to exceed 561 cm, how many will be between 520.5 cm 547.5 cm, between what limits will the middle 50% of the

asked by quantitative analysis for managerial applications
58. AP Literature & Composition

For the life of me, I can't seem to remember the name of Whitney's brother from the shory story "The Premontion" by Joyce Carol Oates. I read years ago. Does anyone remember his name?

59. hum/111 critical thinking

how might you use critical thinking to help someone who is struggling with low self-esteem and low self-worth to see beyond the media message they receive on a daily basics?

1/4x2

61. Psychological Statistics

Simply reporting measures of central tendency or measures of variability will not tell the whole story. Using the following information, what else does a psychologist need to know or think about when interpreting this information? A school psychologist

62. Physics

A tungsten target is struck by electrons that have been accelerated from rest through a 38.9-kV potential difference. Find the shortest wavelength of the radiation emitted.

1.) Determine the equation of the axis of symmetry. y = -5x2 - x + 9 Answer 1.) x=3/2 2.) Determine the equation of the axis of symmetry. y = -6x2 + 3x - 4 Answer 2.) x=-2/10

64. math

How can I calculate how long an amount of money will last if I spend x dollars per month, at the same time as the pot of money is attracting interest at y percent? Is thare a formula? Thanks

A tungsten target is struck by electrons that have been accelerated from rest through a 38.9-kV potential difference. Find the shortest wavelength of the radiation emitted. (answer has to be in nm)

(7ab+4a2b4)+(a2b4-7ab) The 2 and 4 are on top of the a and b. (sqare #)

67. ECONOMICS

Imagine that you manage a company that has invested \$5 million in developing a new product, but has not completed development. At the last meeting, your salespeople report that the arrival of new competing products has reduced expected sales of your new

69. Math

1.Let f(x)= x^2 - 5 and g(x)= 3x^2. Find g(f(x)). 2. Let f(x)= x^2 - 4 and g(x) -3x^2. Find f(g(x)).

70. physics

a motorisrt accelerates their car to 36m/s before realising they are over the speed limit and decelerates to 32m/s. calculate the distance traveled

71. geography

Southwest Asia can best be characterized as A) an area with few resources. B) a desert with an arid and semiarid climate. C) a region of forests. D) an area of forests and grasslands. I think it's B, just checking! thanks in advance

72. Science

I left out the following statements. Thank you very much, Ms. Sue 1) The researchers in a group led by Paro, crossed the files of six generations. Thanks to this experiment, they were able to prove the temperature treatment changes the eye of colour of

73. science

what do you call a river or stream that runs or flows really fast?

74. College Algebra

How would I go about solving for x in the equation: ln(4x-2)-ln(4)=-ln(x-2) Thanks in advance

75. ethics

The outlawing of slavery and extending voting rights to women seem to indicate that ethics can have beneficial results. Give an example from the past that indicates a similar result or a current social policy that might be regarded as wrong, which

76. functions

F(x) x^4-11x^3+34x^2-6x-52 Write f(x)as the prouduct of two linear binomials and a quadratic trinomial

77. GEOMETRY

Last fall, a gardener planted 56 iris bulbs. She found that only 49 of the bulbs bllomed in the spring. Find the empirical probability that an iris bulb of this type will bloom. give answer as a fraction in lowest terms. How many bulbs should she plant

78. economics

Determine the sum of money that must be invested today at 9% interest compounded annually to give an investor annuity (annual income) payments of \$5,000 per year for 10 years starting 5 years from now.

79. world history

What are some political, economical, and social effects on the Cold War?

80. maths

a man has one kind of coffee at 'a' paise per kg and another at 'b' paise per kg.how much of each must he take to form a mixture of (a-b)kg, which he can sell at 'c' paise per kg without loss.

81. math

A sum of RM1,600 is to be distributed among A, B and C. A will get 4 times as much as B and B 3 times as much as C. How much will A get?

). How could benchmarking be effectively used to achieve competitive advantage? Provide an example. 2).What information is gained through managerial accounting? How can a business use this information? As an investor in a small business, what sorts of

83. math C30

An isosceles triangle is inscribed in a circle. The shortest side is the base which is 16 cm long. If the radius of the circle is 10 cm, what is the length of side "a"? Put your answer to 1 decimal place into answerblank 1 (no spaces) Answer:

84. math

What are the x-intercepts for the function f(x) = -x2 - 5x + 6?

85. Physics

B___A (inclined at 55 degree) /| /\ / | / \ Pull 3900N / |/ D---C | /| | / | |/ | !@#\$%^&E | /| | / | |/ | H---G (All is Pin Joint) Distance DC = FE = HG = AB = 2.7m FH = FD = GE = EC = CB = 2 m Find the supporting reaction of H, Member BD (Tension Force),

86. math

My tens digit is 2 times your hundreds digit My hundreds digit is 4 My ones digit is a factor of your tens and hundreds digit Who am I?

87. math multiply and simplify

12s^2-9s-4s+3 = 12s^2-6s+3

88. Math (Algebra)

little Johnny is skate and wants to go a ramp that is 100 foot drop. His path is determined by the equation:h(t)=-16r^2+60t. How long does it take for him to reach the bottom of the 100 foot drop?

89. Math

Carl hired 4 people to work in his shipping department for a week at 8 hours a day. However, after working only 4 hours on the third day, the work was completed. How many hours of wages does Carl owe to the workers?

90. chemistry

what is the difference between a redox rxn in and acidic soln or basic

91. social studies

how many books are in dr.suess, yertle the turtle?

92. Art

Could you please check scientific English in this short dissertation? Thank you, Ms. Sue. 1) Conrad Waddington introduced the term epigenetics in the early 1940s. He defined epigenetics as ‘‘the branch of biology which studies the causal interactions

93. to ms.sue

i mean how many books did he publish in yertle the turtle.

94. english

why did tim o'brien mention the snakes in his novel "lake of the woods"?

95. Humanities

Explain the focus on the idea of natural law as an extension of human nature during the conclusion of the seventeenth century.

96. Algebra

1) The following graphs shows the growth of the median home value in a particular region of the united states starting in 1996. The graphs states in 1996 and shows the trend through the year 2000; therefore x=0 represents the year 1996 and x=4 is 2000.

97. Algebra

List the coordinate of any two points on the graph in (x,y)form. The numbers on the horizontal axis are 1,0,2,0,3,0, 4.0 and 5.0 (___,___), (___,____) Find the slope of this line Find the linear equation of this line in slope-intercept form.

98. Algebra

14) There are 6 marbles in a bag, 3 blue, 2 red, 1 green. Aubrey reaches into the bag and pulls out a marble, does not replace it, then chooses another. What is the probability that Aubrey chides a blue and then a green marble?

99. Pre algebra

How do I solve Quadratic equations by factoring? (for example how would I solve n2 - 10n = -21 if I was supposed to get the answers 7 and 3?

100. physics

A car starts from rest and travels for 6.3 s with a uniform acceleration of 2.3 m/s2. The driver then applies the brakes, causing a uniform acceleration of −1.9 m/s2. If the brakes are applied for 2.6 s, how fast is the car going at the end of the

101. physics

idea about the impact of energy field through medicine

102. English 7

rising action definition

103. maths

If n is an odd integer, all of the following are odd EXCEPT (A) n - 2 (B) 2n + n (C) n2 + n (D) (n + 2)2

104. maths

For a certain year, a ski resort averaged d dollars per week in receipts for its 20-week season. If the resort was closed for w weeks during the season because of lack of snow and earned no money during those weeks, how much money did it earn per week, on

105. physics

A motor drives a rope drum of 820 mm diameter, which in turn drags a component of mass 650 kg, 175 m up a slope that makes an angle of 8 degrees to the horizontal. the component starts from rest and uniformly reaches a velocity of 5.3 m/s on completion of

106. Geology

What can be done to help society improve its understanding of the world's natural resources and how to utilize them? Why?

107. Art

Ms. Sue, could you please check this part,too? Thank you 1) He explained why he wrote Gomorrah; he did it for the new generations, seeing kids who dream to be a killer, who see in crime the only way of achievement. Boys and girls without hope. He saw his

108. Art

Ms. Sue, I need to include these sentences I posted a few days ago to Writeacher. Thank you very much! 1) I'm forwarding you the link to the European Etwinning certificate of quality. 2) Online projects carried out among two or more European schools can be

Her are the data on \$1000 par value bonds issued by Microsoft, Ford, and Xerox at the end of 2008, Assume you are thinking about buying these bonds as of January 2009. Answer the following questions. a. Calculate the values of the bonds if your required

110. English

What does fantastical mean? My essay topic is compare the fantastical in Poe and lawrence's "the rocking horse"

111. computer SQL

Consider the universal table D = {P, Q, R, S, T, U, V, W, X, Y, Z} with the following set of functional dependencies: {P, R} -> {Q, T, U} {T} -> {S} {V, W} > {X, Z} {X} -> {Y} What is the primary key for D? Decompose D into 2NF tables. Decompose D into 3NF

112. Math

Solve for x. .006x^3=8889 x = approx 114, but I don't understand how to get that answer. Can anyone help me solve? Thank you!

113. child development

the curricular approach which encourages children to explore, experiment, and discover is

114. math algebra

multiply and simplify (4-z)z =4z-zsquare? can you please let me know if I am correct

115. english 125

identify at least one major similarity and one major difference between the forms of the short story and the poem.

117. chemistrry

what is the Q of a rxn?

118. Art

Ms Sue, could you please help me express the following ideas? Thank you. 1) Have you thought of a possible common theme? Of course we'll have to wait till September because the school year is about to end. Actually, it ends next Wednesday. 2) If my mother

119. chemisttry

what is the significance of delta H,S,G in thermodynamics