# Questions Asked onSeptember 10, 2008

1. ## Chemistry

Hydrazine, N2H4, is a colorless liquid used in rocket fuel. What is the enthalpy change for the process in which hydranzine is formed from its elements? N2(g) + H2(g) => N2H4(l) Use the following reactions and enthalpy changes: N2H4 + O2 => 2H2O DeltaH =

2. ## Biochem

Calculate the amount of Tris(hydroxlmethyl)aminomethane(Tris) necessary to make 100mL of a 0.100 M Tris buffer that is equimolar in Tris-base (MW=121.1 g/mol) and Tris-HCL (MW= 157.6g/mol)

3. ## Chemistry 2 Ap

If 10.0 g of hydrogen gar reacts with 20.0 g of oxygen gas, how much water will be made? So far this is all i have: (10.0g H2/1)(2molH2/2.02H2) = 9.0099 mol H2 (20.0g O2/1)(2mol O2/32g O2) = 1.25 mol O2 With the limited reactant being O2 Now what do i do?

4. ## math

Your roommate is working on his bicycle and has the bike upside down. He spins the 68.0cm -diameter wheel, and you notice that a pebble stuck in the tread goes by three times every second. What is the pebble's speed? What is the pebble's acceleration?

5. ## Us history

what is the embargo act of 1807?

6. ## Physics

A hobby rocket reaches a height of 72.3 m and lands 111 m from the launch point.What is the angle of launch? What is the launch speed?

7. ## Chemistry

Why are titanium and gallium not very similar while lithium and sodium would be most similar ?

8. ## Spanish

How can I know when to use the preterite or imperfect form of verbs?

9. ## English: The Kite Runner

I am writing a critical lens essay on The Kite Runner for English. This is the first one i have ever written and i don't really get it. By the way, we aren't doing a two book essay, just one. We have to chose 3 literary elements and be able to explain

10. ## Microbiology

Help!!Please. Which may be or is a RNA molecule? AGCCTAC GGGCCCA GCCCUUA AGCCTAC AND GGGCCCA GGGCCA AND GCCCUUA

how many cubic meters of dirt are in a hole 6 meters long,2 meters wide, and one meter deep?

12. ## math

Your roommate is working on his bicycle and has the bike upside down. He spins the 68.0cm -diameter wheel, and you notice that a pebble stuck in the tread goes by three times every second.

13. ## english- write a teacher

can you please give me an example here in the essay of a transitional word- i don't think i am understanding it really... author: Brent Staples my first victim was a woman-white, well dressed, probably in her early twenties. I came upon her late one

14. ## physics

A pair of glasses are dropped from the top of a 32.0 m high stadium. A pen is dropped from the same position 2.00 s later. How long does it take for the glasses to hit the ground? How high above the ground is the pen when the glasses hit the ground?

15. ## literature

What were Emerson and Thoreau's views on nature, the individual and conformity.

16. ## physics

Please help me answer the question below and also show equations and steps of how you came to your answer. Thank you 1. The electron in a hydrogen tom is in the first excited state, when the electron acquires an additional 2.86eV of energy. What is the

17. ## physical science

a car has a mass of 1000kg and accelerates at 2m/s/s. What is the magnitude of the force exerted on the car.

18. ## Calculus

COnsider g(x)=(8)/(x-6) on (6,13) (a) Is this function continuous on the given interval? If it is continuous, type "continuous". If not, give the x -value where the function is not continuous. Is is continous? If not? what interval then?

19. ## English

Teen Pregnancy • Create a full-sentence outline that includes effective arguments and counterarguments to support your thesis. (Note: Outline only the body of your paper.) Remember to avoid bias and fallacies and to include rhetorical devices that

28 x 15 simplify by using distributive property,

21. ## social studies

why do historians divide history into eras

22. ## Physics

A coin relased at the top of a tower hits the ground after falling 1.5 s. What is the speed of the coin as it hits the ground? (Disregard air resistance

23. ## MICRO

The size of the amplified DNA fragment generated during PCR is determined by: a.how many cycles are performed. b. the size of the template c. the location to which the primers anneal. d. how much Taq is used. I believe the answer is c but have had some

24. ## Geometry

Find the coordinates of the other endpoint of a segment with the given endpoit and midpoint M. R(2,6) M(-1,1) Please show steps.

25. ## Algebra II/Trig

solve each inequality: 1-2t>-5 and the answer is: t-6 and that's really positive and divide by 2 and that's where the three comes from ... but why does the > symbol change to < ?!

26. ## Math

Betsy, a recent retiree, requires \$6000 per year in extra income. She has \$47,000 to invest and can invest in B-rated bonds paying 15% per year or in a Certificate of Deposit (CD) paying 6% per year. How much money should be invested in each to realize

27. ## Math

[(6x+1)^3][(27x^2+2)-(9x^3+2x)](3)[(6x+1)^2](6) over [(6x+1)^3]^2 Help me simplify please? Here's what I got so far: [(6x+1)^5]{(27x^2+2)-[x(9x^2+2)]}(18) over (6x+1)^6 It says in the back of the book (it's an odd problem that the answer is 27x^2-24x+2

28. ## Math

the trip will be 560 miles the bus travels at an average speed of 60 miles per hour. Estimate the distance the bus travels in 2 hours.

29. ## Algebra 1 honors

Mr. Oliver invested a total of \$6400, part at 9% per year and the remainder at 8% per year. At the end of 2 years and 6 months, he had earced a total investment of \$1380 in simple interest. How much ded he invest at each rate. I have to come up with the

30. ## Literature

In "To the Memory of My Beloved Master, William Shakespeare." By Ben Jonhson What are two metaphors that Jonson uses as names or titles for Shakespeare?

31. ## english

I read this essay for my english class but i don't understand what this question is trying to ask me- How does staples avoid having the piece sound like a list even though he includes a lot of examples in small area? How is coherence established between

32. ## science

is it more efficient for people to eat plant products or animal produts? why?

33. ## alg

consider the model y=4/9x + 7/3 for the relation between price and quality of chewing gum. a) what does the slope mean? b) use this equation to predict the likely rating of gum which costs 8 cent a stick c) according to this equation what would a chewing

need the biography ofEmily Hutchinson for my English class.

35. ## science

why is planning experiments important to the scientific study

36. ## geometry

I need images of Conic Sections: circle, ellipse, hyperbola and parabola...(those larger ones)...

37. ## math

polk elementry school has three classes for each grade level, kindergarten through fifth grade. If there is an average of 27 students how many students attend polk elementry school?

38. ## Algebra 1

A talk-radio station airs commercials during any time not used for discussions with callers. Commercial time on the station costs \$750.00 per minute. Write a variable expression for the amount of money the station can make on commercials in one hour, based

39. ## government

what is a strength of the multi-party system?

40. ## grade 7 math factors

you can decide if 10 is a factor of a whole number without dividing the entire number by 10 true / false

41. ## Health Care

I am in need of help with this How do disease trends impact the delivery of health care services, such as treatment options and resources available to the public?

42. ## biology with honors

describe how biologists' research contributes to our understanding of the world.

What is the relationship between program planning and grant proposals? What is the difference between program planning and grant proposals?

44. ## statistics

does anybody know how to do z scores? i need help thanks

45. ## Read Y9 chemistry (then anwer this)

2a) Someone finds teo bottles without labels. Both are white solids. One of the white solids turns directly from a solid to a gas on heating. What is this type of change called? b) The other solid turns yellow on heating. On cooling it turns white again.

46. ## Read Y9 chemistry and go upwards

3. Copper carbonate turns black when it is heated and the mass decreases. What is the normal colour of copper carbonate?

4. Lead dioxide gives off a gas when heated. The gas relights a glowing splint. Give the name of this gas. 5. Hydrated cobalt chloride are dark red crystals. Give twoobservations you would make (what you would see) when these crystals are heated.

48. ## social studies

What is the daily life of a child in the 19th century?

49. ## algebra 1

can u help me and put each step down 4(x+7)= -9(x-6)

50. ## science

explain why it is important for scientist to be objective in their observations.

51. ## Elementary Math

Can you explain what the difference between rounding and front end estimation is? For example round 8267-2761= and front end estimate 6489-1807= .

52. ## Science

I need 15 things I do that relate to science

Which one of the following items is an example of a symbol in "Bernice Bobs Her Hair

54. ## chemistry

i have a question on scientific notation. is you have: 8x10 to the 5th power over 2x10 to the -3rd power is the answer 4x10 to the 8th?

55. ## COM

How do you plan to support your thesis with compelling arguments and counterarguments?

who knows the answer to 2*2604(52/9)/7*43+62/56

I don't know how to get answer for problem The larger of two numbers is 20 more than the smaller. Four times the larger is 70 more than 5 times the smaller. find the numbers

58. ## music

Which listening selection from this week did you find most enjoyable? How did the melody contribute to your choice?

59. ## algebra

When solving for the roots of a quadratic equation, three (3) possibilities may arise what are these three possible cases? What do each of these cases mean?

60. ## Science

please help me!!!! Q: what is one way that the phosphorus cycle differs from the carbon and the nitrogen cycles?

62. ## English

What could be a good opening sentence for this? Why do you think people are so fascinated with celebrities? State your opinion and support it with reasons and evidence

63. ## English

Is this a good topic sentence for a paragraph? In A Raisin in the Sun, Lena Younger is the nurturing, morale character who keeps the Younger family in line and earns your respect in the story.

64. ## Math - Factors

What are improper factors? How do we find improper factors for any given numbers?

65. ## college

GEOLOGICAL TERM FOR A BILLION YEARS

66. ## Chemistry 2 Ap

From the mass of CaCo3, caluculate the moles of CaCo3 percipitation. Given- Mass of CaCo3 is 1.838 The answer i got at the end if 18.45 If it"s wrong will you please explain to me what to do.

67. ## social studies

I need a definition for "Direct Democracy"

68. ## Critical Thinking

Why and how could you apply critical thiking when evaluating each of the following: Articles Advertising Media Conversations

A car driving along a straight road increases its velocity from 2.8 m/s to 9.7 m/s in 3 seconds. Calculate its acceleration in m/s^2 A skier in the Giant Slalom will accelerate at a constant 5.0 m/s^2 If she starts from rest, how fast is she going after 5

70. ## Algebra

When equations have infinitely many solutions, How would you know this? also, when working on equations that has no solutions, How would I know this? If posible can you give me examples of each. Thank you

71. ## 6th

what is the smallest number of cars that can be driven in this formation: two cars in front of a car, two cars in back of a car, and a car between two cars?

72. ## math

In a group of 120 secretaries, 82 of them are good at typing, 51 are good at both typing and shorthand, while 54 are poor at shorthand. Some secretaries are poor at both typing and shorthand. a)How many are good at shorthand but poor at typing? b)How many

73. ## probability and statistics

how are you suppose to understand this stuff?

74. ## english

What is a frame story

75. ## Microbiology

The diploid character of eukaryotic cells may mask the appearance of mutation since: A. this may be a frame shift B. the mutation is often reversible C. the mutation may be palindromic D. the matching chromosome may carry the dominant gene. Please help.

76. ## phsycology

Are human beings naturally drawn to violence by some innate evil within them or is it something else?

77. ## Math

I didn't understand BobPursley expl Am I doing this right? Q. 6 toy cars are in 16in 16 divided by 6=2.66 cars p/in How many in 64in = 64x2.66=24 cars 40in = 40x 2.66= 15 cars 104" = 104 x 2.66= 39cars Explanation 64inches* 6cars/16inches = notice how the

78. ## Y9 chemistry

I need to answer a few questions fo my chemistry homework- 1.Why does the mass of copper sulphate decrease as a result of being heated?

79. ## geography

How do peoples' lives change by living near a mountain?

81. ## population size checkpoint

Post A 200- To 300-Word Response To The Following: Explain The Four Factors That Produce Changes In Population Size. What Do You Predict Will Happen To The Nutria Population After All The Land Is Depleted Of Nutrias Food Resource?

82. ## P.E

What are the olympic ideals?

83. ## english

What is the refrain in Sir Patrick Spens, the Wife of Ushers Well, and the Bonny Earl of Murray?

A little more help please. The trip will be 560 miles. Their bus travels at an average speed of 60 miles per hour... The bus route passes through Balmorhea which is 1/3 od the way from El Paso to San Antonio. About how long does it take the bus to get to

85. ## COLLEGE

HOW DO YOU PLAN TO SUPPORT YOUR THESIS WITH COMPELLING ARGUMENTS AND COUNTERARGUMENTS? MY THESIS IS HOW TO SAVE PRAYERS IN THE SCHOOL SYSTEMS?

86. ## math

Describe all the integer values of x that satisfy abs(x)is less thatn abs(x+1)

87. ## Science

What is the measure of the size of a body in a three demensional space is called?

88. ## Design/ Draw HELP NEEDED

can anyone tell me how do we get to know about the history about the writing materils.......esp the times ....so that i can the timeline plz....help...any website or anything

89. ## government

explain how history and tradition have worked to preserve the two part system?

90. ## effective writing

COM 150 Comprehensive Grammar CheckPoint Read the following sentences, and focus on the grammar area specified in the left column. Then, complete Appendix H by selecting the correct sentence (a or b) for each number and providing an explanation of why you

91. ## science

How do you read a triple beam balance?

92. ## burr

jupiter orbits the sun at a rate of 8 miles per second haw far does jupiter travel in one day

93. ## Calculus

consider k(t)=(e^t)/(e^t-7) on[-7,7] Is this function continuous on the given interval? If it is continuous, type "continuous". If not, give the t -value where the function is not continuous. I say continous, am I wrong? If I am wrong what interval is it

94. ## Macro Economics

If supply increases and demand increases, the the price must drop while the number of units purchased may remain unchanged. T or F?

95. ## 6th

why are 2002 american dollar bills worth more than 2001 american dollar bills?

96. ## Spanish

¿qué esto dice? ¿cómo se llevaban tu y tus companeros de clase cuando tenias 7 anos?

97. ## History

what's the limitation to women's rights and freedom in the Australian workforce in the 1990's?

98. ## Math

Am I doing this right? Q. 6 toy cars are in 16in 16 divided by 6=2.66 cars p/in How many in 64in = 64x2.66=24 cars 40in = 40x 2.66= 15 cars 104" = 104 x 2.66= 39cars

99. ## chemistry

Give the number of chloride ions in 11.1g of calcium chloride.(Mr=molar mass) n=m/Mr=11.1/110.98=0.100moles of CaCl2 Please help!

100. ## effect or affect.

here's the question i have to answer about political activists. What affect do they have, and how are their efforts measured? so in my answer i still use affect and not effect, right? I think a lot of the time their affect is to create a strong reaction

101. ## college math 122

A sales clerk's weekly salary is \$300 plus 2% of her total week's sales. find a function P(x) for her pay for a week in which she sold X dollars of mrchandise.

102. ## math/chemistry

I don't understand how to round to significant digits 565 lb * 30 ft 4900 ft/ 144 sec 786 hr * 23 miles per hour

103. ## biology

why is diffusion through a membrane sometimes faster?

104. ## physics

what is the acceleration of a car that travels in a straight line at 100km/hr

105. ## social studies help!

How do peoples' lives change by living near a river valley and mountain?

106. ## english

linking or action verb and why? First of all, he was fully given to the lord.

107. ## health

components of Health communications

108. ## algebra

perpendicular or parallel? x+9=y and y-x=-5 ? 2. 2x-7y=5 and 2y-7x=7? 3.Slope-intercept equation y=? of this problem the slope is 3.3 and y-intercept is (0,-7) ? 4. m=4, (3,1)....what is y=? 5. m=2/3, (5,-8)?

109. ## Jane Eyre Help

It's not a question,but thank-you very much for sharing this information with us, i haven't found any page as good as this so far and that can help me as much! Thanks again! x

110. ## Philosophy - Logic

I have a few logic questions that I am having difficult with and would be greatful for any insight... #1 I need to know if this is a real or apparent argument. A: I saw Bob with Mary last night. B: You saw Frank, Bob's identical twin, with Marsha last

111. ## mathematics

Simplify these 2x+3/5 + x+2/3 and m+2/2 - m/3

112. ## ecosystems

How are the flow of matter and the flow of energy through ecosystems different?

113. ## chemistry

What is the molality of a sodium chloride solution if 3.5 grams of the salt is added to 998 g of water Your Answer:

114. ## college

Can someone help me with American Government.

115. ## chemistry

(3.21x10 to the 8th)(6.32x10 to the -12th) is it... 20.2872x10 to the -4th?

116. ## Literature

What does the narrator mean when she says the afternoon was 'sweet milk fresh' ?

117. ## Science

What is a soil and water conservation??? - Thanks -

118. ## government

Does the entire senate vote on federal and state bills?

Small companies typically have difficulty competing against large multinationals when their governments take part in regional trade blocs. What could governments do to help their small companies compete after the formation of such blocs? Could I get help

120. ## algebra 2

*the line is parallel to the 3x-2y=6 *the line has the same y-intercept as the line y-4=2(x+1) *line will never pass through the fourth quadrant

121. ## math

simplify and evaluate where g=3 (2g-1)^2-2g+g^2

122. ## Chemistry

what is the formula to change the temperature of K to C

A Majory Theory in Science

10-3y=1 find the value of y

125. ## health

do you know why we have to leatrn "the stuff" in 5th grade health

126. ## Mathematics

R^2 + R^2 = R^3 Solve for R

127. ## Matematics

D = F/(C-E) Let C be the subject

128. ## History

What was Massachusetts Bay Colony's economic policy? Like what did they do to make money.

Factorzation

130. ## math

0.57 repiton

A bud covers the bloom but when it erupts it holds up the flower from underneath find the name it’s divided into together and alone? -thanks-

132. ## math

What is a Factorzation?

134. ## English

Hi I am a high school student and I am dual enrolled in college. I have an essay due for my composition class in college and I mention Wet n Wild in my paper. I wanted to know if Wet n Wild should be capitalized since it is a place name or if it should be

135. ## Science

The same force acts on two objects with different masses. Why does the object with less mass have a larger acceleration?

136. ## algebra II

solve: -3/4(k)

137. ## Math

A calender watch loses one second per day. At this rate, what is the approximatelength time, in years, for the watch to lose exactly 24 hours? all i need to know is how to calculate how many seconda are in 24 hours.

138. ## Algebra

suppose a,b,c and d are different positive integers whose sum is 100, and a-c=5. What is the greatest possible value of ab-cd?

139. ## math

two questions that i cannnnnnot get!: 2/3(t)-(2-3t)

140. ## government

What are different types of legislations, and how do I decide which one is linked to certain issues?

141. ## science

I am doing a paper on the maritime ringlet butterfly. I've been through quite a bit of sites but I can't seem to get a hold of satistics on the estimation of how many maritime ringlet butterflies remain, or even any sort of stats at all. I also can't seem

142. ## math

Find the range of each set of numbers. 7, 7, 5, 4, 1, 9, 8, 8, 8, 5, 2

143. ## math

give the five number summary of each set of numbers. 7, 7,5,4,1,9,8,8,8,5,2

144. ## Macro Economics

If the price of Honda ATV's increased while the number sold increased, then what must have happened in the market?

145. ## Chemistry 2 Ap

Thats CaCo3 is equal to 1.838 grams. **sorry!

146. ## criminal justice

can anyone put in lamen terms on what or how annotated bibligography?

147. ## economics

Why would people attack the assumption of homo economicus? Can anyone please explain to me?Thanks a lot!

148. ## l.a.

can you put these in aphabetical order: batch, nick, rough, lead, dove, fling, shrug, gush, stuff, notch, jut, damp, tenth, scan, guess, cot, tough, stump, laugh, sense.

150. ## government

Why are people required to join a political party??

151. ## vocab

what is this agist nonagist references

152. ## Math - Geometry

In a quadrilateral, how do I find the measure of angle AHM that is 3x+5 and another angle TMH is 7x-27?

153. ## Design/Draw

thanks for helping..........I went to both the website and i got the explanation but their is no time mentioned.....like from when it strated or when it changed or anything .....do u know any web which has mentined about the times???

155. ## Algebra 1/Geometry

1. |-5 1/4 - 2/3| |-5 3/12 - 8/12| I forgot how to subtract fractions like the one above, can anyone refresh my memory? 2. Q bisects segment PR, PQ = 3y, and PR = 42. Find y and QR. Don't know how to do this. Explain to me please?

157. ## goy

how many candidates showed up on the 2004 ballot??

158. ## algebra

here are term and term numbers 1 2 3 4 ________ 1 3 6 10 what is the expression for the nth term

159. ## Math

How do I multiply more than two binomials? Something like: (a+bx)^3 (not necessarily cubed, though). I know to use FOIL, but I don't know how to use it when there's more than two binomials... Sorry that I don't have any actual numbers to work with.

160. ## LOGIC

I keep getting different answers from different sources on these questions... I'm still not sure. Anyone else who can lend their opinion? #1 I need to know if this is a real or apparent argument. A: I saw Bob with Mary last night. B: You saw Frank, Bob's

161. ## social studies

definitions for monogamy polygamy polyandry polygyny neolocal matrilocal patriarchal

Show each of these numbers as a product of prime numbers only: 10 and 25

163. ## alg

the thickness of a book is determined by the thickness of its cover and its pages. the front and back covers of a book like this one are each about 3 mm thick and every 25 pages adds an additional millimeter to the thickness. let nb be the number of pages

164. ## Calculus

Is this function continuous on the given interval? 7x+(x^2/3) on[-5,5] I say no, because it is undefined at some value in the interval.

165. ## Math

Why is a giant's hand only 11 inches long?

Are volcano's alive?

167. ## 9th grade Eng. Honors

How does the mood of a story affect the outcome?

168. ## information technology

What are the different types of software

169. ## math

If you need 138 balloons and have 5 bags, each bag has same number of balloons in it. We need 18 more balloons to finish How many balloons in each bag?

170. ## social studies

definitions for matriarchal bigamy egalitarian bilneal patrilineal matrineal

171. ## riddle

what can open doors without force even the strongest man can not do it only i

I need to know about a woman name christine salazar can you help?

173. ## social studies

What is a map and how is it used?

174. ## i need help!!!

probability and statistics a z score is z = x - xbar divided by s which is standard deviation s = 6.36 x = ? xbar = 54.8 the x is all the data sub. from 54.8 individually which i came up with 1.2 and divided it by 6.36 and the number is .1886.....and the

175. ## writing

pronoun reference agreement? David lent his motorcycle to someone who allowed their friend to use it.

176. ## Writing

I have to write 10 statements on the pros of dress code. I have 5 for con so far: 1. freedom of expression 2. waste of money 3. dress code can give you meaningless detentions 4. limited choices on what to wear. 5. being different from each other. can you

177. ## chemistry

examples of suspension and solution

178. ## math

whats a consecutive side and whats a consecutive angle?

if an airplane carring the u.s. swim team crashed directly on the border between the united states and canada, in which country would the survivors be buried?

180. ## social studies

What is a republican?

181. ## social studies

What is a democratic

182. ## algebra

slope of 4 and y-intercept of (0,3) find slope-intercept equation that has same characteristics?

183. ## economics

what would be two really great stocks to pick for a stock market game? or do you know of a useful website i could visit?