# Questions Asked onSeptember 29, 2010

1. ## chem

what test will you perform to determine when you have added sufficient NaOH solution to the reaction mixture in reaction 2

2. ## Chemistry

To what volume should you dilute 25mL of a 12.0M H2SO4 solution to obtain a 0.170M H2S04 solution?

3. ## chemistry

Because of the porosity of the filter paper some of the CaC2O4 x H2O precipitate passes through the filter paper. Will the reported percent of the limiting reactant in the original salt mixture be reported too high or too low? explain

4. ## Pre-algebra

How do you simplifyan algebraic equation?

5. ## Chemistry

If 18.8mL of 0.800M HCL solution are needed to neutralize 5.00mL of a household ammonia solution, what is the molar concentration of the ammonia? How do I solve this? Thank you.

6. ## Chemistry

Please check if I've balance the equation correctly. C8H18 + 25/2O2 --> 8CO2 + 9H2O

7. ## Statistics

A certain company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of a battery is normally distributed, with a mean of 45 months and a standard deviation of 7 months. If the company does not want to

8. ## chem

what test will you perform to determine when you have added sufficient NaOH solution to the reaction mixture in reaction 2

9. ## chemistry

For a TLC lab,the stationary phase is the mixture of isopropanol and ammonia or the mixture of hexane,ethyl acetate and ethanol, the stationary phase is silica gel. text some dyes and drugs. which one of the two mobile phases is the more polar? Actualy I

10. ## calculus

Find the second derivative of the volume of a cube with respect to the length of a side

11. ## statistics

Hey. I am having problem with stem leaf plot diagram. Heres the data I need to make steam leaf plot out of: 1.7 5.7 7.6 8.7 9.8 12.0 13.2 13.6 14.6 15.8 16.0 17.5 19.3 21.5 21.8 23.8 24.4 27.7 33 33.0 34.4 35.4 Can someone tell me how I would do that?

12. ## physics

A diver running 1.6 m/s dives out horizontally from the edge of a vertical cliff and 3.5 s later reaches the water below.How high was the cliff?How far from its base did the diver hit the water?

13. ## chem 1411

Mg(NO3)2 + (NH4)3PO4 predict the product and balancing the equation. Use solubility rules to predict if a precipitate is formed.

14. ## science

Does anyone have BC science 10 workbook answers (assessments)?

15. ## chemistry

how would you prepare 60.0 mL of 0.200 M HNO3 from a stock solution of 4.00 M HNO3?

16. ## Psychology

Hi , I need to write an esay intergrating the social representations approach with three attitudes, namely gender, race and poverty. Please help

17. ## chemistry

A sample of 0.6760 g of an unknown compound containing barium ions (Ba2+) is dissolved in water and treated with an excess of Na2SO4. If the mass of the BaSO4 precipitate formed is 0.1405 g, what is the percent by mass of Ba in the original unknown

18. ## chemistry

If 30.0 mL of 0.150 M CaC12 is added to 15.0 mL of 0.100 M AgNO3, what is the mass in grams of AgC1 precipitate?

19. ## Zeeland WEST

In a car accidnet involving a sports car, skid marks as long as 290 m were left by the car as it decelearted to a complete stop. The police report cited the speed of the car before breaking as beeing in excess of 100mph 161 km/m. Suppose that i took 10

20. ## british lit.

mark syllables, separate feet with short vertical lines, and indicate the rhyme scheme

21. ## Chemistry

A student placed 12.0g of glucose (C6H1206) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-ml mark on the neck of the flask was reached. The flask was then shaken until

22. ## brith lit.

mark the syllables, separate the feet with short vertical lines, and indicate the rhyme scheme on the following lines: That time of year thou mayst in me behold When yellow leaves, or none, or few, do hang Upon those boughs which shake against the cold,

23. ## life science

1) outline the main problems associated with the greenhouse gases. 2) why fossil fuels referred as non renewable resources? 3) describe the strategies that could be implemented to reduce pollution and exploitation associated with fossil fuels 4) suggest

24. ## chm

I need to find the mass of 0.0225 mole of NH3?

25. ## Physics 1

There are six books in a stack, and each book weighs 5 N. The coefficient of static friction between the books is 0.2. With what horizontal force must one push to start sliding the top five books off the bottom one? Help how do i do this????? a)1 N b)5 N

26. ## Physics 1

A rock is thrown straight upward with an initial velocity of 9.6 m/s in a location where the acceleration due to gravity has a magnitude of 9.81 m/s2. To what height does it rise? Help meh please.

27. ## Physics question bout falling

Objects that are falling toward Earth in free fall move a)faster and faster. b)slower and slower. c)at a constant velocity. d)slower then faster.

28. ## chem

(b) If the natural abundance of Ag-107 is 51.84%, what is the natural abundance of Ag-109? 48.16 % (c) If the mass of Ag-107 is 106.905, what is the mass of Ag-109? 108.9 amu so i got the answers correct but kinda forgot how because it took me a while so

29. ## inorganic chemistry

what is the geometry structure of Fe(NH4)2(SO4)2.6H2O?

30. ## Physics I

You are conducting an experiment inside a train car that may move horizontally along rail tracks. A load is hung from the ceiling on a string. The load is not swinging, and the string is observed to make a constant angle of with the horizontal. No other

31. ## statistics

The weights of individual nails produced by the 'Hammer 'n Nail' hardware company follow a normal distribution with the average nail weight being 5.1 grams and the standard deviation in nail weight being 1.6 grams. When a nail is produced it is discarded

32. ## Algebra story problem

I hate story problems they r a nightmare. One poll reported that 48% of city residents were against building a new stadium. The polling service stated that the poll was accurate to within 3%. What is the minimum percent of city residents that oppose the

33. ## English

Can you check if these sentences are grammatically correct? Thank you 1) It's the ages since I last saw him. I haven't seen him for ages. 2) When did you see him last? 3) How long ago is it since you last saw him? 4) She regretted that she hadn't passed

34. ## English

What is the verb, the subject, the predicate nominatives, and direct object in the folling sentence 1.In September of 1739, David Brainerd entered Yale College. 2. Yale was a good school for young preachers. 3. After four months of school, Mr. Brainerd

35. ## chemistry

suppose 100 g of lead nitrate salt is added to enough water to make 1 L of solution, what is the concentration of the lead ion in the moles per liter in each of the solutions?

36. ## chemistry

suppose 100 g of lead nitrate salt is added to enough water to make 1 L of solution, what is the concentration of the lead ion in the moles per liter in each of the solutions?

37. ## english

please can you help me with six sentences with the collocations below: 1-out of breath 2-out of this world 3-dry clothes 4-sleep heavily 5-turn cold 6-a dry sense of humour

38. ## earth

If the Earth has so much mass, then how does it "float"? (My 8th grade Astronomy class trying to figure this out. -Lauren

39. ## chemistry

how can I find the mass of 0.0225 mole of NH3?

40. ## Stats

Instructions for Data Sets: In each data set, the dependent variable (response) is the first variable. Choose the independent variables (predictors) as you judge appropriate. Use a spreadsheet or a statistical package (e.g., MegaStat or MINITAB) to perform

41. ## physics

A water tank measures 2m*4m*5m. what mass of water will it contain

42. ## geometry

The sides of a quadrilateral are 3, 4, 5, and 6. Find the length of the shortest side of a similar quadrilateral whose area is 9 times as great.

43. ## College Anatomy

Where do bones increase in length? Where do bones increase in diameter?

44. ## Physics

If an object weighs 70 pounds and it gets hit by a truck with a force of 7400 N, and there is a frictional force of -35 N, what is the net force?

45. ## MATHS! URGENT!

describe how each sequence is generated and write down the next two terms: a) 40 41 43 46 50 55 b)90 89 87 84 80 75 c)1 3 7 13 21 31 d) 2 6 12 20 30 42 PLEASE HELP its urgent!

46. ## chemistry

If the decomposition of 3.785 g iron (III) chloride yields 1.302 g iron and 2.483 g chlorine, how many grams of iron and chlorine are produced when 2.175 g iron (III) chloride decomposes?

47. ## English

what poem does " That there our veins might through Thy Person bleed/To quench those flames, that else would on us feed" come from?

48. ## history of africa

how did geography help or hinder the process of migration from middle east to africa

49. ## medical terminology

which of the following is an example of a symptom?

50. ## computers

With newer Linux kernel distributions, what happens if you connect a hot-swappable device, such as a USB drive, containing evidence?

If two is company and three is the crowd,what are five and four?

52. ## math

The lenght and the width of a rectangle are in the ratio 3:2. If the lenght is increased by 20 and the width is decreased by 5, the ratio of the lenght to the width becomes 2:1. Find the lenght and width of this rectangle.

53. ## physics

Vector vector A has a magnitude of 6.90 units and makes an angle of 46.5° with the positive x-axis. Vector vector B also has a magnitude of 8.00 units and is directed along the negative x-axis. Using graphical methods find the following. (a) The vector

54. ## physics

a stone of mass 30 grams is placed in a measuring cylinder containing some water. the reading of the water level increases from 50cm cubic to 60cm cubic. what is the density of te stone?

55. ## chem 101

you have solutions of MgSO4(aq) and MnSO4(aq). what would you add to distinguish between the two?

56. ## chem 101

write a balanced chemical equation for the complete combustion of sucrose.

57. ## Statistics

Is the following classified as interval, ordinal or nominal data? The marks achieved by the students in a statistics course out of 100.

58. ## chem 101

if combustion is complete, a brown liquid caramel might form, followed by a brown/black solid. what would be the major component of the solid?

59. ## Linear equations i think

If y = 4x + 14, what is the value of y ÷ -4? choices a) x+7/2 b) -x - 14 c) -x + 14 d) none of these

60. ## Physics

Estimate the work you do to mow a lawn 14m by 23m with a 0.5m-wide mower. Assume you push with a force of about 15N.

61. ## math

how to simplify (1-cos^3(x))/(x^2)

62. ## Algebra help

Solve by completing the square x2 - 2x - 5 = 0. Help please a)1 plus or minus√6 b)-1 plus or minus√6 c)-3 plus or minus 2√6 d)3 plus or minus 2√6

63. ## physics

a circuit consists of two identical parallel metallic plates connected by identical metallic springs to a 102V battery. With the switch open, the plates are uncharged, are separated by a distance d=7.80mm, and have a capacitance C=2.00microF. When the

64. ## Chemistry

a nugget of gold with a mass of 437g is added to 50ml of water the water raised to a volume of 90.0 ml what is the density of the gold

65. ## Chemistry

How can the absorptivity of alumina be varied? Thank you all:)

66. ## Chemistry

What difficulty may result if a chromatographic column is not placed in a vertical position?

67. ## hcs 588 MEASURING PERFORMANCE standards

What key QI measurement tools would you use to measure quality outcomes such as a reduction in patient falls, medication errors, complication rates, and so forth? Why?

68. ## english

Read the poem Remember ? by Alice Walker and answer the questions. -> Why is the title effective? -> What metaphor is used in the poem and what other two poetic techniques does Alice Walker use?

Solve the compound in equality. I don't know how 5>-3x + 4 or 9 to -4x2. THANK YOU!!!

70. ## NewGeometry

Line segment XY has a midpoint of L. 1/3XY = 3. What is the midpoint of XY?

110. ## physics

A person jumps from the roof of a house 3.6 -m high. When he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of 0.70 {\rm m}. If the mass of his torso (excluding legs) is 46 kg. Find the average force

111. ## 2nd time posting bc i still need HELP! PHYSICS!!!!

The velocity of a diver just before hitting the water is -8.6 m/s, where the minus sign indicates that her motion is directly downward. What is her displacement during the last 0.86 s of the dive? im so stuck. i tried this problem several times, and my

112. ## physics

How much work (as measured in joules) is required to push an electron through a region where the potential change is +73 V? Assume the electron moves from a region of low potential to a region of higher potential. 1 J

113. ## physics

Two point charges are located as shown in the figure, with charge q1 = +3.2 C at x = − 3.0 m, y = 0, and charge q2 = +2.5 C at x = +1.0 m, y = +2.0 m. An electron is now taken from a point very far away and placed at the origin. How much work must be

114. ## physics

Four point charges, each with Q = 7.2 µC, are arranged at the corners of a square of edge length 3.6 m. What is the electric potential at the center of the square? 1 V

115. ## chemistry

how does electronegativity and charge effect a solutions solubility

116. ## nutrition

After World War II, farming, fishing, and other food production activities became large scale enterprises which caused Question 5 answers a decrease in economic development. American diets to become less diverse. the over producing and over consuming of

117. ## physics

A 5.4 g bullet leaves the muzzle of a rifle with a speed of 334 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.95 m long barrel of the rifle? ___N

118. ## physics

The coefficient of kinetic friction between a refrigerator (mass 93 kg) and the floor is 0.12, and the coefficient of static friction is 0.35. If you apply the minimum force needed to get the refrigerator to move, what will the acceleration then be?

119. ## math

determine the slope of the line shown at the slope the graph top point 6y the right point 6x. the left is -6 and the bottom-6,m= type an integer or a simplified fraction type N if the slope is undefined.

120. ## science

Each liter of air has a mass of 1.80. How many liters of air are contained in 2.5 times 10 to the third power kg of air?

121. ## Chemistry

A first order chemical reaction has a rate constant of 8.7×103 s-1 at 30 °C and a rate constant of 5.8×104 s-1 at 64 °C. Calculate the activation energy, Ea, for the reaction. I keep getting 5.25e-6 kJ/mol but apparently that's not the correct answer.

Is there anyway you can apply to be a tutor on here?

123. ## DNA

What nucleotide sequences do not code for proteins?

Clayton and Olivia played a computer game. Olivia's final score was 2 306 421 and Clayton's was 2 302 972. Show these numbers on a number line. Whose score was greater? I know which score is greater but I am having trouble figuring out the number line and

125. ## college

I need to write 5 sentences showing the verb and its tense. The sentences need to be about the role of education in sucessful financial planning. I am so confused

What do parentheses mean in Math?

127. ## physics

A car accelerates from rest at 7.9 m/s2. How much time does it need to attain a speed of 5 m/s? Answer in units of s.

128. ## South America

an area that has one or more features in common

129. ## Math

Find each specified function value: What am I doing wrong because the correct answer for (a) is 3 and (b) is -t^3/4-5t^2/4-t+3 Here's the problem: P(x)=2x^3-5x^2+2x+3 (a) P(0) 2(0)^3-5(0)^2+2(0)^3 2-5+3 my answer I get O (b) Here's the problem

130. ## Math

Evaluate each polynomial for the given value of x. 3x^2+2x^2-3 (a)x=-2 (b) x=t (c) x=2u (d) x=-3v

131. ## functions

Identify a rational function whose graph is a horizontal line except for two holes. Graph function.

complete to show how you can find the sum by making a ten, hundred, or thousand. 9+5=14 9+1+ blank 10+ blank blank 90+50=140 90+10+blank 100+blank blank 900+500=1400 900+100+blank 1000+blank blank

133. ## social studies

vocabulary an area that has one or more features in common.

134. ## math

write in order from least to greatest the six numbers whose digits are 2,8,and 9

135. ## Chemistry

A first order chemical reaction has a rate constant of 8.7×103 s-1 at 30 °C and a rate constant of 5.8×104 s-1 at 64 °C. Calculate the activation energy, Ea, for the reaction. I keep getting 5.25e-6 kJ/mol but apparently that's not the correct answer.

What is a 12 letter word for observations involving descriptions based on instrument measurment?

137. ## social studies

what is lattitude?

138. ## geography

name at least 5 bodies of water ? what are they thank you

139. ## Math

data regarding the value of a particular color copier is represented in the graph find the rate of chance of the value with respect in time in dollars per year. the rate of change of the value with respect to time is dollars per year

s2-3s+t+5s2

141. ## Physics

One gram of water changes from liquid to solid at a constant pressure of 1.00 atm and a constant temperature of 0°C. In the process, the volume changes from 0.60 cm3 to 1.14 cm3. Find the work done on the water? Find the change in the internal energy of

142. ## geometry

Line segment XY has a midpoint of L. 1/3XY = 3. What is the midpoint of XY?

143. ## college

what is the proper verb tense in the sentence below? With an education i will be able to find a better job?

144. ## Translation simple question

Can anyone please give me a decent translating website I need english to french or french to english. Thanks.

145. ## English

what is the proper verb tense? With an education i will be able to find a better job?

146. ## English

Is this a present tense verb sentence? I believe education is a very important role in successful financial planning

147. ## ecology

what is a long-term change that takes place in two species because of their close interactions with each other?

148. ## english

What verb tense would this sentence be? I am learning so much about financial planning in my personal finance class.

149. ## english

where the red fern grows...how did seeing a red fern help billy

150. ## physics

A Carnot engine operates between 170°C and 20°C. How much ice can the engine melt from its exhaust after it has done 6.0 104 J of work? i need a step by step process. you don't have to give me the answer.

151. ## chemistry

For the reaction: 2MnO2+ 4KOH+ O2+ Cl2 yields 2KMnO4+ 2KCL+ 2H20 there is 100. g of each reactant available. Which reagent is the limiting reactant?

262. ## science

A 60-year-old patient who comes to the emergency room with shortness of breath is experiencing A. dysphagia. C. pleural effusion. B. inspiration. D. dyspnea.

263. ## Physics

How many uranium atoms are there in 8.2 g of pure uranium? The mass of one uranium atom is 4 × 10^−26 kg.

264. ## Physics ??

A passenger sitting in the rear of a bus claims that she was injured as the driver slammed on the braked, causing a suitcase to come flying toward her from the front of the bus. If you were the judge in this case, what disposition would you make and why?

Marty now has6 more pogs than jen has.After he gives 10 pogs to jen, how many more pogs will jen have then Marty?

266. ## spelling

I need a sentence with its, not it's.

268. ## Spelling

wats another word for happiness.

269. ## algebra

Write and solve an inequality to find the approximate circumference of Earth using the following information - the 4 million miles of public roads in the U.S. would: Reach to the moon and back more than eight times, circle the globe more than 157 times

270. ## math

It is greater than 7 tens and less than 8 tens. The number has 4 ones . Write the number word . ???

271. ## Accounting

What would you pay for a $50,000 debenture bond that matures in 15 years and pays$5,000 a year in interest if you wanted to earn a yield of: (Round computations to 2 decimal places and use the rounded amounts to calculate the final answer. Round the final

272. ## Algebra

Express the following in simplest radical form. All variables represent positive real numbers. square root of 80a^2b divided by the square root of7a^3b^7 I got an answer of 4 square root of 5 divided by b^3 square root of 7a

304. ## History

Describe Sumerian religious practices

I have been trying to figure this out for a long time to no avail. Can you please help. Also, are there any rules that help figuring these out? write a rule for the function represented by the graph. domain: 0,3,6,9 range : -2,-1,0,1

306. ## Social Studies

the Legislative branch has a group of people that makes laws called the_____. congress is made up of two groups or "houses" called the______.

307. ## 8TH Grade social studies

what does the constitution define treaty as?

308. ## Math

what is f(x)=|x| and f(x)=x(cubed)

309. ## Social Studdies

describe terrace farming in china

310. ## Calculus 2

find the area of the region f(y)=y/(16-y^2)^1/2, g(y)=0, y=3

311. ## Gradient Vector Fields in Mathematica 7

How would you plot the gradient vector field of f(x,y)=x^2-3*x*y+y-y^2 on the domain [-4,4]*[-4,4] in Mathematica 7? I know the function is "VectorPlot" (h t t p : / / g o o . g l / p c S f), but I don't know how to isolate the x and y inputs because of

312. ## Earth Science

Please and Thank you. Mercury is 13.6 times more dense than water. If a container can hold 20g of water, how much more massive would an equal volume of mercury be?

313. ## 5th math

find the missing numbers and landmarkd for the set of numbers below: 18,20,20,24,27,27,____,30,33,34,36,36,_ Range:22 Mode:27 Minimum______ Maximum:______ please! show me this problem so, i can do my next problem thank you!!

314. ## Social studies

the constitution requires each house to keep a daily record of all meeting. these records are printed daily in___________. the supreme court is made up of _____ supreme court justices who hold their offices for________.

315. ## social studies

the supreme court hears cases dealing with represenatives of foreign nations and in cases in which one state has been named a party in a lawsuit. this is called______.

316. ## Algebra 2

Is this how you solve t(t+1)(t+2)=0, x^3+4x=4x^2, and 3r^2=4r-1? t(t+1)(t+2)=0 t=0 or t= -1 or t=2 {0, -1, -2} x^3+4x=4x^2 x^3+4x-4x^2=0 x(x^2+4-4x)=0 x(x^2-4x+4)=0 x(x-2)(x-2)=0 x=0 or x=2 {0,2(double root)} 3r^2=4r-1 3r^2-4r+1=0 r^2-4r+3=0 (r-3)(r-1)=0

317. ## physics

The coordinates of point 1 are 250 units of X and 40 units of Y. The coordinates of point 2 are 250 units of X and 70 units of Y. The slope of the line between points 1 and 2 is what?

318. ## Math

Amanda checked out 7 fiction books from the library. She also checked out three times as many non-fiction books. The next day, Amanda returned 5 books to the library. How many books does she have now. Write an expression to explain your answer?

319. ## 5th

find the missing number: 18,20,20,24,27,27,____,30,33,34,36,36,_ I need you to show me this answer cause, i got stuck with this one. thank you!

320. ## humanities

Need a 750-1000 word essay on identify an individual or group of individuals who have continued to pursue liberty and happiness in the twentieth century and beyond.how have he/she/they impacted the world and how will their contributions impact future

321. ## Film

In the film, "A Face in the Crowd", what is Elia Kazan trying to say about the commodification of these populist ideas and their use as a tool in mass media?