1. chemistry

the quantity of electricity required to reduce 12.3g of nitrobenzene to aniline assuming 50% current efficiency is 1. 115800 C 2. 57900 C 3. 231600 C 4. 28950 C

2. Precalculus

A swimming pool is 3 feet deep in the shallow end. The bottom of the pool has a steady downward drop of 12 degrees toward the deep end. If the pool is 50 feet long, how deep is the deep end. So I said that first you would subtract three from 50, of course

3. Algebra I

What is the answer to Algebra with pizzaz p.93 How Can Fisherman Save Gas?

4. Math

from a window 35 meters high, the angle of depression to the top of a nearby street light is 55 degrees. The angle of depression to the base of the streetlight is 57.8. How tall is the streetlight?

5. chemistry, plz check work

NH3+H2S-->NH4HS

6. Precalculus

1.A plane takes off at an angle of 6 degrees traveling at the rate of 200 feet/second. If it continues on this flight apth at the same speed, how many minutes will it take to reach a n altitude of 8000 feet? 2. A plane takes off at an angle of 5 degrees.

7. Gen. Chemistry

A 0.887 g sample of a mixture of NaCl and KCl is dissolved in water and the solution is treated with an excess of AgNO3 producing 1.822 g of AgCl. What is the percent by mass of each component in the mixture?

8. Precalculus

1. A man stands 12 feet from a statue. The angle of elevation from the eye level to the top of the statue is 30 degrees, and the angle of depression to the base of the statue is 15. How tall in the statue? 2. Two boats lie on a straight line with the base

9. dual nature of matter & radiation

Light of frequency 1.5 times the threshold frequency is incident on photo-sensitive material.If the frequency is halved & intensity is doubled,the photo current becomes 1. Quadrupled 2. Doubled 3. Halved 4. Zero

10. Precalculus`!

Ruth is flying a kite. Her hand is 3 feet above ground and is holding the end of a 300 ft. kite string, which makes an angle of 57 degrees with the horizontal. How high is the kite above the ground

11. OChem

Anhydrous conditions are vital for a successful Grignard synthesis. To demonstrate this point calculate the mass of the water it would take to destroy the phenylmagnesium bromide you will synthesize. What is he volume of this amount of water? -How exactly

12. physics

A block of mass 0.570 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x. The force constant of the spring is 450 N/m. When it is released, the block travels along a frictionless, horizontal surface to

13. social

How did diversity both provide benefits and crate problems for mongol rulers? => a rich cultural diversity developed during the Yuan dynasty. The major cultural achievements were the development of drama and the novel and the increased use of the written

14. physics

Your friend is confused about ideas discussed in chapter 4 that seem to contradict ideas discussed in this chapter. For example, in Chapter 4 we learned that the net force is zero for a car traveling along a level road at constant velocity, and in this

15. Chemistry

KOH + KHP --- balanced equation???

16. CHEMISTRY

PartA: Ammonia,is a weak base with a Ka value of 1.8x10^-5 .What is the pH of a 0.22M ammonia solution? PartB: What is the percent ionization of ammonia at this concentration? I got the answer for PartA which is pH=11.3. but i cant slove PartB..HELP!!!

17. Organic Chemistry

How would you purify Fluorene contaminated with ethyl-4-aminobenzoate? What method and solvent you would use? Please help...

18. Chemistry

How do you solve this: Consider the decomposition of ammonium chloride at a cerain temperature NH4Cl(s) Calculate the equilibrium constant Kp if the total pressure is 2.2 atm at that temperature.

19. chem

If 60.0 mL of 0.150 M CaCl2 is added to 50.0 mL of 0.100 M AgNO3, what is the mass in grams of AgCl precipitate?

20. college math

Assume that there are 16 board members: 10 females, and 6 males including Larry. There are 4 tasks to be assigned. Note that assigning the same people different tasks constitutes a different assignment. (1) Find the probability that both males and females

21. Math help

A rocket shoot straight up from the launch pad. Five seconds after lift off, an observer 2 miles away notes that the rocket's angle of elevation is 41 degrees. How far did the rocket rise during those 4 seconds?

22. MATH!!!

Suppose that a person with a reach of 27 inches and a shoulder height of 5 feet is standing upright on a mountainside that makes a 62 degrees angle with the horizontal..Can the person touch the mountain?

In what way is the measurement 5.60 cm like 5.6 cm? How is it different?

24. Algebra

Find the y- and x-intercepts for the equation. Then graph the equation. Does y come first in the solution? I figured that: the first solution is (0,-3) is this correct? and is x = to {3/7,0}? Thanks! f(x) = - 3 - 7x

25. PLZ HELP MATH

from a window 35 meters high, the angle of depression to the top of a nearby street light is 55 degrees. The angle of depression to the base of the streetlight is 57.8. How tall is the streetlight?

26. Algebra

For the following equation, state the value of the discriminant and then describe the nature of the solutions. -7x^2+3x-4=0 What is the value of the disriminant? Does the equation have two imaginary solutions, two real solutions, or one real solution?

27. social studies

what was the reason for baltimore's successful shipyards

28. Math

solve the equation 20x^3 +44x^2 -17x -5 given that -5/2 is a zero of f(x) 20x^3 +44x^2 -17x -5 I used synthetic division and got 20x^2-6x-2=0 took 2 and divided it out of that equation 2(x+5/2)=10x^2 -3x-1 then i factored it out the right side of the

29. TRIG

find: sin 23pi/12 i got totally the wrong answer how do i approach this?

30. Chemistry

Include an explanation, balanced chemical equation, units, significant figures and/or calculations where appropriate. Standardization of NaOH Solution Trial 1: 0.501 g KHC8H4O4 15.22 mL NaOH Trial 2: 0.503 g KHC8H4O4 15.11 mL Trial 3: 0.500 g KHC8H4O4

31. HIT 105 RESEARCH PROJECT

I don't know what to put down for the concluding section. For my introductory, I put down - The Health Insurance Portability and Accountability Act of 1996(HIPPA). The congress mandated implementation of several federal privacy protections that allows

32. stats ?

In order to improve the English speaking and reasing skills of their students, Jack Box Elementary assigns students whose native language is Spanish to a bilingual program for 8 week. To test the effectiveness of this program, then also need a control

33. Biology

In the following chemical reaction, what is carbon dioxide (CO2)? 12 H20 + 6 CO2 -> 1 glucose molecule + 6 O2

34. Math

Another question is a guy wire stretches from the top of an antenna tower to a point on level ground 18 feet from the base of the tower. The angle between the wire and the ground is 63 degrees. How high is the tower? So I said the tower was 3503 fet high

35. college gen chem

A quantity of 16.13 mL of a KOH solution is needed to neutralize 0.4883 g of KHP. What is the concentration (in molarity) of the KOH solution?

36. English

How would you put this in your own words. I'm having some trouble can you please help me out. Organs that are grown from stem cells from a foreign source would have foreign DNA that does not match the DNA of the individual. That patients would have to take

The shorter side of a rectangle is 20 m. Decreasing the longer side by 30 cm reduces the perimeter by one half. How long are the longer sides of the original rectangle? Explain the reasoning.

One side of an isosceles triangle is 15 cm shorter than the other 2 sides. The perimeter is 120 cm. How long are the sides of the triangle?

A solution of volume 80.0 mL contains 16.0 mmol HCHO2 and 9.00 mmol NaCHO2. If 1.00 ml of 12 M HCl is added to this, what will be the resulting pH?

40. social

How did Mongol rule affect cultural development in the lands under their control?

41. Chemistry

Include an explanation, balanced chemical equation, units, significant figures and/or calculations where appropriate. Determination of the Molar Mass of an Unknown Acid Trial 1: 0.499 g unknown acid 24.07 mL NaOH Trial 2: 0.501 g unknown acid 23.71 mL NaOH

Describe your nationalism...why do you support being part of United States?

43. finance

An increasing average collection period indicates 1)the firm is generating more income. 2) accounts receivable are going down. 3) the company is becoming more efficient in its collection policy. 4) the company is becoming less efficient in its collection

44. Math

A plane passes directly over you head at an altitude of 500 feet. Two seconds later you observe that is angle of elevation is 42 degrees. How far did the plane travel in 2 seconds?

45. precal

Determine the quadrant in which theta lies: sec theta>0 and cot theta

46. Finite Math

A delicatessen serves meat sandwiches with the following options: 3 kinds of breads, 5 kinds of meat, and lettuce or sprouts. How many different sandwiches are possible, assuming that one item is used out of each category? Thank you!

47. chemistry

what is the difference between the combined gas law and the ideal gas law? are they the same thing?

A rectangular tablecloth is 2.5 m long. Trim is to be sewn around the perimeter of the cloth but there is not enough. What decrase in width will make the perimeter 0.4m shorter if the length remains the same?

Draw an equilaterla triangle. Divide each side in half and join the points to make four small equilateral triangles. Rearrange these four equilateral triangles into a parallelogram. Compare the perimeter of the original triangle with the perimeter of the

50. chemistry

How would you prepare 250.0 ml of a 0.6 M aluminum sulfate solution

51. finance

A firm has \$600,000 in current assets and \$150,000 in current liabilities. Which of the following is correct if they use cash to pay off \$50,000 in accounts payable? 1)Current ratio will increase to 5.0. 2)Net working capital will increase to \$500,000.

52. Math

What is the volume of a square pyramid with the height of 8cm and the base 10cm by 12cm?

Posted by Kat on Monday, March 2, 2009 at 11:21am. A solution of volume 80.0 mL contains 16.0 mmol HCHO2 and 9.00 mmol NaCHO2. If 1.00 ml of 12 M HCl is added to this, what will be the resulting pH? Responses * CHEM HELP...PLEASE!! - DrBob222, Monday,

54. ALGEBRA

WHAT 2 NUMBERS EQUALS -272 WHEN YOU MULTIPLY THEM AND THOSE SAME 2 NUMBERS EQUAL 2 WHEN YOU ADD THEM?

55. physics

Does the KE of a car change more when it goes from 10 to 20 km/h or when it goes from 20 to 30 km/h?

56. science

OMIGOSH!!!!!!!!!! IT IS SNOWING OUTSIDE!!!!!!!!!!!!!!!!! okay sorry....so thx 4 readinng this. anywho, my science teacher says that humans come from apes. we have to write a paper on the subject, but it sounds kinda strange to me. is he making this up?

4x+y=6 y=2x

58. English- Oedipus

Why did Oedipus gouge his eyes out?

59. French

Could you please check these thanks. Directions complete each sentence with the form à (such as au, aux ect.) or de. 1. En Franch, un garçon, de treize ans va --------- collège. Answer: au 2. Et une fille qui a seize ans va ---------- lycée. Answer: au

60. Math

Use synthetic division and the remainder theorem to find the value 3x^3-5x2-6x+4 f(-5) I got a remainder of -466 is this correct

Read the passage labeled number 2 starting on p. 473 in your text. As you read, either use the Two Column Note (see directions on how to create a table below these directions) or the Spider Web graphic organizer to identify the main idea and supporting

62. Historical Fiction

My teacher wants me to write a historical fiction story. We need a source from the internet with ".edu" at the end of the address. My paper is going to be on World War II, so could you find a website on World War II with ".edu" at the end?

63. Chem

Colloidal sulfur Would it be network, molecular, ionic or atomic?

65. Language

One particularly nice afternoon, several students were trapped in a classroom listening to a monotonous lecture by a professor the local college. After over two hours of mind-numbing discourse, one student stood up in despair and noted that she had a book

66. Pre-Chemistry

What is the chemical name thing for salt? Anyone? Bueller?

67. Chemistry

Could you help me with this question: A molecule of chloroform, CHCl3, has the same shape as a molecule of methane CH4. However, methane's boiling point is -164 degrees celcius ans chloroform's boiling point is 62 degrees celcius. Explain the difference

68. Physical Science

I need help answering a few questions? What is intertia? How is it involved in the first law of motion? Two children who are fighting over a toy pull on it from opposite sides. The result is a stand off. Explain this in terms of the net force. These

69. physics

A loaded ore car has a mass of 935 kg and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected to a winch. The shaft is inclined at 26.0° above the horizontal. The car accelerates uniformly to a

70. physics

A quick ratio much smaller than the current ratio reflects 1) a small portion of current assets is in inventory. 2) a large portion of current assets is in inventory. 3) that the firm will have a high inventory turnover. 4) that the firm will have a high

I don't get this question, can someone please explain it, thanks. Heres the question: A lighthouse beacon can be seen 24 mi in all directions. What is the area over which the beacon can be seen? - I think it's circumfrence, but I don't really know what to

72. MATH!!!

Suppose that a person with a reach of 27 inches and a shoulder height of 5 feet is standing upright on a mountainside that makes a 62 degrees angle with the horizontal..Can the person touch the mountain? I said no but idk why?

73. intro to economics

Please check my answers and I need help on some of the problems. I'm in a intro to economics course at a university. My professor did not provide a book for this course citing that she rarely had her students use it. So all I have are notes. I would like

74. physics

On a slide a child has a potential energy that decreases by 1000 J while her kinetic erergy increases by 900 J. What other form of energy is involved and how much?

75. Social Studies

According to Procopius two sixth century Christian monks undertook an elaborate smuggling operation to provide Byzantium with the expertise to produce what? A) steel B) iron C) ceramics D) gun powder E) silk

76. math

Evaluate x^2 - 3x + 6 for x=3+i (3+i)^2 - 3(3+i)+6 3+2i-9-3i+6 I got 0 - 1i is this correct or do i use 0

77. Algebra

Find a polynominal for the perimeter and for the area. The demensions are: Width:b+3, Length:b The perimeter is: The area is: Do not factor. Please help.

78. math

write 0.3246 as a percent

79. Finite Math

A manufacturing company in city A wishes to truck its product to 4 different cities, B, C, D, and E. If the cities are all interconnected by roads, how many different route plans can be constructed so that a single truck, starting from A, will visit each

80. Identify the substance

There was a substance I used in a lab for chem class and I`m not too sure what it was. They were tiny white balls about a millimeter in diameter. What would they be?

81. algebra

You want to refurnish your home in 3 years. The interior decorator informs you that this will cost \$25,000. What should be your payment into an account that gives 6% compounded quarterly?

82. math

There are 11 players on a soccer team. A basket ball team has 5 players. How many more players are in the soccer team. can u explain me this question

Draw a hexagon and a rectangle that have the same perimeter as the triangle.

84. misc-college info

so for my work i have to pick a career choice and do some research on the basic information needed for that choice for example: i am interested in culinary arts. ..can someone give me information like, how many years of college you must take, and what are

86. Psychology

I am trying to find info on the Wolf Man case that Freud did, I can't find much on it

How do you solve this problem? 3x = 4y x + y = 21 Help please.

88. Algebra I

(-4m^3)(2m+m^2) I have to use the property of exponents to rewrite the expression. I'm just asking if -3^6 is right. (we don't have to solve it--just simplify it) Thank you!

89. Math

Graph the linear equation. I need coordinates, but don't think they match up to my choices. I would appreciate some feed back. ThankS! 4y + 36x = -32

90. chemistry

what happens to sodium zeolite A at the end of the wash cycle? Describe an experiment you could do to test this hypothesis.

91. Biochemistry

Could someone please tell me the effects of anions on enzymes? For example, does anion such as NaCl act as an activator or inhibitor of the enzyme amylase?? I tried google but it just gave me nonsensical scienfitic papers. My reasoning is that it is an

92. social studies

What countries did Fidel Castro help gain independence

93. misc-college info

Ms.Sue told me that the best thing would be to go and interview the chef. but that is only for if i want to work with the chef right. like if i was interested in restaurant management, talking to the owner would be a better choicce.. right?

94. Reiny+ In need of help

Hey Reiny, could you please take a look at my expo growth and decay post? Thanks alot.

95. life science

i have to write a essay on the human reverse life cycle. i know i have to start with a introduction. i need to know how to start the introduction.can you help me to start my human reverse life cycle introduction?

96. Reiny

Can you check back at my last post again? Thanks.

97. science

i need help writing up the discussion for a science experiment. I need to know what to include and say in it.

98. math

how do you make a ratio table to solve a word problem ?

99. Eng. Ms. Sue

How could I put this is my own words? Reproductive cloning could be used effectively for repopulating endangered species or to help make breeding of specific animals easier.

100. HUM 130

How are newer religions different from older ones? How are they similar?

101. Statistics

What kind of transformation will remove a right skew or a left skew from a distribution of data?

102. English

what are the negative points of the topic "advertisements do more harm than good".

103. dental assistant

what film size is known as the standard film?

104. music

When a piece of music is in 3/4 time, does it have a swaying or marching feel? P.s..I'm typin this in class so could ya hurry??

105. Culinary Arts...HELP!!

Okay. sooo...i know that if you add flour to a substance it thickens up.But what can you add to a substance to thin it out (other than water...)

106. Algebra I

If i have two base variables with exponents for example: 4x(3x) After getting x^2-would i have just ONE variable base? i.e. 4(3x^2) or place the exponent on BOTH variable bases like this: 4x^2(3x^2)? Thanks!

107. History in the Arts

Does anyone happpen to know what years Audrey Hepburn received her Academy Awards?

3 2/3*2 7/8

109. random assignment-stats

Would this correctly result in random assignment? A researcher assigns students to one of three conditions based on the month of their birth. If they were born in January, April, July, or October, they are assigned to condition A. February, May, August,

110. Maths

Trudy brought a large bag of wine gums to school. She gave half to the first student she met, half the remainder to the next and half of what she had left to the third student. The last 5 wine gums she ate. How many were in the packet?

111. MATH

Addition of Polynomials (w^2 -2w+1) + (2w-5+w^2)

112. French continued

Could you please check these too (God Bless) Directions: Write sentences according to the model below. (Doesn't matter if you use the form of de or à) Example: l'école/le restaurant Je rentre de l'école et je vais au restaurant. 1. le lycée/le magasin

113. english

examples of predicates and subjects

114. chemistry

what happens to sodium zeolite A at the end of the wash cycle? Describe an experiment you could do to test this hypothesis.

115. Math

Determine the solution set to the equation: 2sin^2x+cosx-2=0

116. chemistry

How much water should be added to 55.0 mL of 0.201 M HCl to dilute the solution to 0.155 M? i used M1V1 = M2V2 and i got 71.3mL its wrong so im confused

117. For all teachers

Does anyone know when the french teacher will be online? I just wanted to know thanks.

118. Science

What is waters freezing point? What is Magnesium and Ammonias freezing point?

119. POEM JOURNEY BY MARY OLIVER

WHAT IS THE SUMMARY OF THIS POEM??

120. Literature

Have anybody ever read anne franks diary.?

121. Algebra - check to see if correct

Telephoto lens. Use the formula from Exercise 67 to find the image distance i for an object that is 2,000,000 mm from a 250-mm telephoto lens. (Section 6.7 (1/f = 1/0 +1/i) 1/i = 1/250 - 1/ (2*10^9) i=25.

122. math

how do you solve 2a in construction

123. 10th grade English (Art Essay)

This is my Art assignment but I just wanted to make sure whether there are any mistakes. Please help! Reading or evaluating the visual images around us is a critical skill to have in our lives. By looking at different images and sculptures, people can

124. Science

How many oranges will one orange seed produce?

125. English

What is poetry?

126. Algebra

40=-0.2x+45 i cant seem to solve this problem.

127. social studies

which country would experience tropical masson climate

128. Math

how do you factor d^2 -19de+48e^2? What two numbers multiplied together will equal 48, and has a sum of -19?

129. stats ?

A researcher is designing a study to examine whether "talk therapy" (psychotherapy) can help people suffering from depression, as an add-on to taking medication. Finances and logistics limit her to having one control group, so she has to choose the best

130. stats ?

A researcher investgating depression devises a study that contains the independent variable "Treatment," manipulated between-participants. Participants may experience "psychodynamic therapy," "cognitive behavioral therapy," "medication," or "waiting list

131. stats ?

The Title I coordinator for the district has been tasked with developing a plan to test two new intensive remediation programs for students with dyscalculia (like dyslexia, only numbers are the problem, rather than words!). The students are 60 8th graders

132. organic chemistry

What compounds gives diethylamine, on reduction with lithium aluminum hydride?

133. organic

what amine forms an N-nitrosoamine on treatment with NaNO2 in dlute aqueous acid at 0 degrees celsius?

134. organic

what is the best way to synthesize 4-isopropylbenzonitrile?

When you are multiplying something such as (3x^5y^4)(2x^2y)...do you add or subtract the exponent thingies?? AHHHHHHHHHHHH.

136. History!!

What year did Christopher Columbus reach America?? I forgot...;)

137. math

coleen hid a coin equivalent to a fraction of a dollar behind her back. She said the fraction is smaller than 1/2 and greater than 1/20. What is two possible coin could she have hidden. How do you know? Then she sid it was five time greater than 1/20. Shat

138. Algebra

What is the function of f(0), f(1), and f(2)? f(0)= f(1)= f(2)=

139. Algebra

How do I find the function value of f(x)=x^3; f(2)=?

Some words ending in "e" are irregular in their formationsnof the past tense. For each word underline the root word, circle the ending, and draw a box around the irregular forms of the words.Please help. ride rides rode riding

141. anatomy

What is the muscle in your calf called...like the really long word? Also the arm bones are the humerus and radius, right?

1) 5 = 2t - s 20 = 8t - 4s Answer: Identity 2) 4t - 6s = 2 -6t + 9s = -3 Answer Identity

143. Math

Find the y- and x-intercepts for the equation. I have an idea of how to do this but want to make sure I am going in the right direction! Thanks! 4y = -28 + 7x

144. Algebra

Find an equation of the line having the given slope and containing the given point. Express your answer in the form x=a,y=b or y=mx+b; with m=-8,(7,0)? how do I do this?

145. Science

how does mass affect the way an object moves?

147. random assignment-stats

Would this correctly result in random assignment? 1. A researcher assigns students to one of three conditions based on the month of their birth. If they were born in January, April, July, or October, they are assigned to condition A. February, May, August,

148. MATH

SUBTRACTION OF POLYNOMIALS (4-5Y+Y^3)-(2-3Y+Y^2)

149. English

I have to write a research paper on Maya Angelou. I can do it in autobiographical stlye. I have no idea of how to begin with this. I picked up 3 books of her works, but don't have a clue. Any help? I want to do it myself, but do it well.

150. French continued

Could you please check these to thanks! Directions: Complete the names of these dishes you have for lunch using à, au, aux. 1. une soupe ------- oignon. Answer: à l' 2. un sandwich -------- jambon. Answer: au 3. un sandwich ------- fromage. Answer: au 4.

151. math

2i/4-8i 2i/4-8i * (4+8i)/(4+8i) then i multiplied the top and bottom and got 8i/ 4^2 + 16i/8^2 8/80 + 16i/80 reduce to 4/5 + 2i is this correct

152. Nutrition.

What are the nutritional needs of adult men and women between the ages of 19 to 65?