Questions Asked onMarch 11, 2009

1. chem

6) How many significant figures should be retained in the result of the following calculation? 12.00000 x 0.9893 + 13.00335 x 0.0107 A) 2 B) 3 C) 4 D) 5 I thought it was 3, but it is 4. Can you please explain to me

2. Chemistry

An iron ore sample was dissolved in hydrochloric acid and the iron was obtained as Fe2+(aq). The iron solution was titrated with 38.54 mL of 0.471 M Ce4+ solution according to the balanced chemical equation below. Ce4+(aq) + Fe2+(aq) -> Ce3+(aq) +

3. Calculus

Use implicit differentiation to find dz/dy for yz = ln (x+z) I am unsure of how to deal with the right side specifically.

4. social studies

i need information on the abolitionist movement. any recommendations?

5. Chemistry

Write balanced equations for the formation of [Ni(NH3)6][BF4]2 starting from an anhydrous sample of nickel(II) choride hexahydrate. (3 equations necessary) I am slightly confused by this. I think the starting sample has the formula [Ni(H20)6]Cl2 Would this

6. college

Does this passage contain an argument? Will a beverage begin to cool more quickly in the freezer or in the regular part of the refrigerator? Well, of course it'll cool faster in the freezer! There are lots of people who don't understand anything at all

7. social studies

What was the cause and effect of the proclamation of 1763?

8. Chemistry check

I just want to make sure my answer is correct. I have to balance the equation. Hydrogen + Chlorine -> Hydrogen chloride H2 + Cl2 -> 2HCl

9. physics

two people are pushing a car of mass 2000kg. if they each push with a force of 320N at an angle of 15degrees to each side of the car, calculate the acceleration of the car, assuming no resistance... please help

10. Chemistry

Given: Mg + 2HCl --> H2 + MgCl2 0.250 g of magnesium reacts with 10.00 mL of 1.5 M HCl. What volume (in mL) of H2 gas is produced?

11. literature

if you consider the call of the wild to be an allergory, whichone of the following staements would be true

12. English

In the novel, "The Great Gatsby", why according to Catherine has Tom not left Daisy to marry Myrtle Wilson? Thank you for your help.

13. chemistry

The thermal decomposition of dinitrogen pentoxide in the gas phase to give nitrogen dioxide and oxygen is a first order reaction. If the half life at 55 C is 410 s, what is the value of the rate constant k? If the initial concentration of dinitrogen

14. Chemistry

I'm about to do the second part of a Limiting Reagent laboratory tomorrow. There are a few questions that are giving me trouble on the pre-lab assignment. In the first lab period, we measured the amount of H2 gas produced in a reaction of Mg and 10 mL of

15. chemistry

1) Arrange the metal-metal ion reactions (aluminum, copper, nickel), M^n+ + ne^- --> M^0, in a column, in order of decreasing ability as oxidizing agents... What I put was : Al^+3 + 3e^- --->Al Ni^+2 + 2e^- --->Ni Cu^+2 + 2e^- --->Cu 2) Also, explain your

16. history

Source F: If abolotion shall take place, our interest in the West-India islands must be at an end,Seventy millions of property will wear away with time, and be sunk at last. The revenue will suffer an annual reduction of three millions at least; the price

17. SPANISH HELP SO CONFUSED

completa estos esoganes con la forma adecuanda del Imperativo de los verbos que aparecen entre parentesis. 1. "________ (creerselo-tu), Londres desde 38." 2. " pierd esta opotunidad, ________(venir-tu) a conocernos." 3. "No _______(dudarlo-usted),

18. pscychology

Could someone pretty plz plz plz help me...What are the 2 biggest parts of the human brain??

19. SPANISH HELP SO CONFUSED

completa estos esoganes con la forma adecuanda del Imperativo de los verbos que aparecen entre parentesis. 1. "________ (creerselo-tu), Londres desde 38." 2. " pierd esta opotunidad, ________(venir-tu) a conocernos." 3. "No _______(dudarlo-usted),

20. Math

How do you do this question? It has to do with dependent events. There are 2 green marbles, 3 blue marbles and 4 red marbles. Find the probability for the question below if you pick a marble, do not replace it, then pick a second marble. Probability of

21. phsical education

bandmanton skill and technique which required improvemant describe a performance

22. MATH

Find the amount accumulated in the sinking fund if \$350 is deposited monthly for 14 years at 7% per year. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest dollar.)

WHAT IS 3/10 TH,S OF 20 AND WHY?

24. Human Services

The class will be divided into two clusters for a debate about regulatory issues in health care and human services. The Pro Lobbyists will argue that, through standards and accountability, a highly regulated environment benefits the delivery of health care

25. math

how do you find a unit price? is there a formula you need to follow? ex.)how would i find a unit price on an ice cream that if 14 Fl. ounces, has 3 1/2 servings per container and each serving is 1/2 cup. the price of the ice cream is \$4.79.

26. religion

for religion we are doing a saint prject. We did Saint (our name) and made a picture of ourselves. Then we had to label things on our body ( which we can exaggerate) that a saint would have. ex. big ears for listening, big helping hands to help people in

27. DRBOB

when you said that a is the constant ,and b is the path length what do you mean?? would the constant be 10 because for wavelength we increased it by 10 each time??

28. Romeo and Juliet

Could you please help me with this thanks. In act 1 scene 5 Romeo and Juliet say speeches that form a sonnet. Could you give me a link that will give me a translation of what they are saying. Thanks for your time

29. Algebra 2

solve and graph the inequalities y >=xsquared y

30. healthcare

I need some help with listing at two pros and cons for each of the given patient and caregiver roles as a -Mechanics and machines -Parents and children -Spiritualists and believers -Providers and consumers -Partners This is so I can right my paper

31. chem

Is this a good way to define crystallization: decreasing the temperature or evaporating the solvent can create crystals?

32. social studies

Which battle was the most important one of the revolutionary war, and why?

33. Social Studies

basic beliefs of command economy

34. Spanish

I have to translate several words into Spanish, but I have to write down at least three different variations of those words depending upon the Spanish speaking country. Can someone provide website that could help me with this?

35. statistics

consider the following sample statistics from a population that is aproximatly normal. n=15, s= 7.92,level of confidence is 99 % Calculate the margin of error( round to the nearest hunderth)

36. statistics

consider the following sample statistics from a population that is aproximatly normal. n=15, s= 7.92,level of confidence is 99 % Calculate the margin of error( round to the nearest hunderth)

find the (9+8x).12= X=3/4

38. college pre statistics

consider the following sample statistics from a population that is aproximatly normal. n=15, s= 7.92,level of confidence is 99 % Calculate the margin of error( round to the nearest hunderth)

39. Chemistry check

I need to balance the following equation. I just want to make sure I', right: Zn + HCl-> ZnCl2 + H2 Zn + 2HCl-> ZnCl2 + H2

40. math

deetermin the slope and the y-intercept of each question #1 5x+2y=10

evaluate (9-8X).12 If X=3/4

42. Science

Think of a sizzling hot barbeque grill. Can You give two examples of chemical changes in matter that may be taking place in it?

43. Math- Function Rules

Write a function for the input-output table. Input x- 0, 1, 2, 3 Output 7- 3, 4, 5, 6

44. pre-calculus

im having trouble finding a general solution for sin2x+sinx=0 all of the examples our teacher gave in class seem much different and i'm not sure what to do. i tried to start by using the sum-to-product formula but now i'm stuck. any suggestions?

45. math

3x+3 = -2x-12 find x

46. math

x/4 - 4 = 3x/4 - 6 Find x

83.6/4

48. Math

evaluate (9-8X).12 If X=3/4

49. Polynomial, Monomials, and binomials.

If you know how to do the following let me know thanks.

asked by Math gurl (not really)
50. history

please help president Roosevelt's progressive record included all the following EXCEPT a. conservation of forest land b. break-up of several trusts deemed harmful to the public c. regulation of food and drugs d. establsihment of the Federal Reserve System.

What is a horn formed by? Wind or Glaciers?

52. history

which of the following caused a split in the women's suffrage campaign? a. Alice Paul's aggressive strategy b. Carrie Chapman Catt's "Winning Plan" c. the decision to press for a constitutional amendment d. World War I no idea, pleease help!

53. phsyics

hi, has anyone done the lab on 1.2 lab : constant velocity? it's about ticker tape. thanks

54. French Cuisine (urgent)

What was food like before and after the French Revoltuion. And why did it change? can someone help me please? thank you.

55. AE

In a multicultural classroom, what are the concerns in terms of social justice for all students? How would address these concerns?

56. physics

A certain radio wave has a frequency of 2.0 * 10^6 Hz. what is its wavelength?

57. science

I have a bill like a duck, But the hair of a mammal i lay eggs like a bird, But I nurse my young what am I?

58. physics

here is my question: A bullet with a mass of 6.00 g is fired through a 1.25 kg block of wood on a frictionless surface. The initial speed of the bullet is 896 m/s, and the speed of the bullet after it exits the block is 435 m/s. At what speed does the

59. physics

find the final equilibirum temperature when 10.0 g of milk at 10.0degC is added to 1.60*10^2 g of coffee with a temperatrure of 90.0degC. Assume the specific heats of coffee and milk are the same as for water (Cp,w=4.19J/g*degC) and disregard the heat

60. Spanish

How do you say I liked the vacation because it was fun. (Imperfect)

61. french

i understand what this paragraph is generally talking about but i feel that i really don't understand it (i have a reading comprehension quiz on this tomorrow) can someone help? Papa, qui était en train de prendre son café au lait, a dit "aie, des

62. social studies

unscrabble this epgbsairrkn

63. Caring for School-Age Children

Child care staff are most effective during science activities when they A.encourage convergent thinking B. answer questions as soon as they're asked C. guide children through structured activities D. limit experimentation to ensure safety I chose A can

64. math

MULTIPLICATION OF WHOLE NUMBERS BY FRACTIONS: TO FIND 3/4 OF 12... A. 1/4 OF 12 IS ? B. 3/4 IS 3 TIMES AS MUCH AS ? C. 3X3= ? SO 3/4 OF 12 IS? MY DAUGHTER WROTE HER ANSWERS, BUT I WANT TO BE SURE THEY ARE CORRECT. THANKS.

65. MATH

MULTIPLICATION OF WHOLE #'S BY FRACTIONS. FIND EACH PRODUCT: 1. 1/2 OF 20 IS ? 2. 2/3 OF 15 IS ? 3. FIND TWO-FIFTHS OF TEN ? 4. FIND TWO SEVENTHS OF 28? THANK YOU!

66. Hearing Aids ; Physics

I`ve looked at a lot of websites regarding how a hearing aid work but none of them told how the sound waves were involved in depth. Like what happens to the sound waves in the microphone, amplifier and speaker. Could someone explain this to me.

67. stats

Data on number of days of work missed and annual salary increase for a company's employees show that in general exployees who missed more days of work during the year received smaller raises than those who missed fewer days. A detailed analysis showed that

68. women mathematician

any idea of what mabel schmeiser barnes' field of mathematics was? any information on her parents and if she had siblings? major contributions to world of mathematics? i could only find one good site but i couldn't find anything that helped with my

69. stats

Data on number of days of work missed and annual salary increase for a company's employees show that in general exployees who missed more days of work during the year received smaller raises than those who missed fewer days. A detailed analysis showed that

70. math

Can you tell me if this is the correct way to write in standard form: 1. Fifty-four million, six and six hundredths: 54,000,006.06 2. Thirty-three million, five and five hundredths: 33,000,005.05

71. math

I'm sorry I was unable to open your answer. My question was if you could tell me if the following is correct in standard form 1. fifty-four million, six and six hundredths 54,000,006.06 2. thirty-three million, five and five hundredths 33,000,005.05

72. math equation

umm i learned this abt 6 months ago in an advanced class but i totally 4got, so help plz? the equation is: 420=x^2+x how do i solve for x? thx for the help :)

73. chemistry

i don't know how to write balanced chemical half reactions for the oxidation of copper, aluminum, and nickel. can anyone help me?

74. Biology

What is the purpose of the root hair and how does its structure aid it in performing this function?

75. chemistry

Tris(hydroxymethyl)aminomethane, commonly called TRIS or Trizma, is often used as a buffer in biochemical studies. Its buffering range is pH 7 to 9, and Kb is 1.19 10-6 for the following aqueous reaction. (HOCH2)3CNH2 + H2O (HOCH2)3CNH3+ + OH -

76. AP Chemistry

help with acid/bases If the pH at 50.0 mL of NaOH added is 4.0 and the pH at 150.0 mL of NaOH added is 8.0, determine the values Ka1 and Ka2 for the diprotic acid. Ka1 i dotn know how to start, please help!

77. FRACTION SUBTRATION MATH

Subtracting a Fraction From 1 Joe Jumped robe for 3 minutes and 24 seconds. How many seconds is three minutes and 24 seconds. I can figure this out but have no clue how to turn it into a fraction subtraction problem...Can't remember. Thanks!

78. Math (not specific knowledge, just research)

For math class, we are planning an indoor carnival. We need to figure out the size of each exhibit and vendor, and make sure all of them fit into the space. We can choose any large indoor space we can think of. I did some research online and chose the

79. Science

a 500 Newton ballerina did 250 joules of work to lift herself upwars through the air. She landed a total of 2.5 meters to the left after completing her jump. How high did she jump?

80. english

when the legends die by hal borland when tom reflects that he succeeded in killing the past, what does he mean? why did he need to kill it, and how did he? please please help me .

81. Noah and Flood story

What do you like about the Noah and Flood story as told in the book of Genesis? Personally, I love the fact that it has alot of detail and that it provides chronological information. What do you like about it?

82. English

Hi! I am trying to come up with metaphor/simile to say that writing a newsletter in microsoft word is very difficult ei discovered that writing an entire newspaper on Word rather than on Publisher was like trying to... ( do a greek puzzle blindfolded?)

say that I measured the voltage of electrochemical cells: Zn/Cu: -0.961 V Pb/Cu: -0.360 V Ag/Cu: 0.425 V Sn/Cu: -0.275 V Fe/Cu:-0.516 V Directions: If you assign Cu an arbitrary electrode potential value of 0.00 V, the numbers above are the reduction

84. Math

A translation has this rule:(x-5,y). Fill in the answers This translation is (how many) Units (in what direction) Answer:

85. Biology

Are there Japanese Beetles in Italy? I couldn't find out if there were or not. Thanks for looking this up!

86. Math

Two old watches were found. Both watches were set for the current time. Forty-five minutes later one old watch was 1 minute ahead and the other old watch was 2 minutes behind. The next morning one watch read 7am and the other read 6am. At what time were

87. Physics

A 10 kg sled slides down a hill with an incline of 30 degrees above the horizontal. Because of friction, it maintains a constant speed. For every meter that is traveled, how much energy (in joules) does the sled lose? I say 98 sin(30) Joules?

88. chemistry

why does Fe3+ react with sea salt/ NaCl????? help out

89. Physics

A cart is launched on an air track with a certain speed from the force of a compressed spring. If you wanted to launch the cart at twice the speed, the spring should be compressed by? I say twice as much.

90. School-Age Children

Melissa plays with the same four girls everyday.She has a lot of energy, is independent, and is concerned about what her friends think. Melissa likes soccer and baseball and takes pleasure in beating the boy's team.Melissa is most likely to be A.3-5

91. math

Compare fractions-write in order least to greatest. My daughter wrote them incorrectly at first, then we found what the answer should be, but can you explain to her why the answers are what they are. Thank you. 1. 2/5, 1/10, 3/20 answer----1/10, 3/20, 2/5

92. Physics

Does the axis system chosen affect the magnitude of potential energy? I say yes

93. math

Compare fractions-write in order least to greatest. My daughter wrote them incorrectly at first, then we found what the answer should be, but can you explain to her why the answers are what they are. Thank you. 1. 2/5, 1/10, 3/20 answer----1/10, 3/20, 2/5

94. English

1. According to 'spacing words', write the following right. Iaminmyfirstyear. -> I am in my first year. 2. Let's write down the self-introductory passage on the memo on the left. 3. Correct the following self-introductory passage for Tom right. 4.The first

95. English

1. After you write short passages about two of your friends, send an e-mail to one of your classmates. The student who gets the e-mail should write a short reply. 2. Read the reading fast, right, and with emotion out loud. After that measure your reading

96. English

1. WPM=130 means 130 words a minute. This is the similar reading speed of the listening test for first graders in middle school. 2. Write the second sentence in Number 2 in Italic script. 2-1. Write the second sentence in Number 2 in cursive type. 3.

97. MATH

Find the amount accumulated in the sinking fund if \$1600 is deposited quarterly for 20 years at 6% per year. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest dollar.)

98. MATH

Find the amount accumulated in the sinking fund if \$1600 is deposited quarterly for 20 years at 6% per year. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest dollar.)

99. chemistry

How many moles is 66.02 grams of Fe?

100. chemistry

The rate of formation of C in the reaction 2 A + B ----> 3 C + 2 D is 2.2 mol/L.s. Calculate the rates of reaction of A and B, and the rate of formation of D.

101. chemistry

In a study of the alcohol dehydrogenase catalysed oxidation of of ethanol at 25.0 C, the molar concentration of ethanol decreased in a first-order reaction from 220.0 mmol/L to 56.0 mmol/L in 1.22 x 104s. What is the rate constant of the reaction at 25.0

102. Chemistry

Write balanced equations for the formation of K4[Ni(NCS)6] starting from an anhydrous sample of nickel(II) nitrate. (3 equations necessary)

103. algebra

If x is >2 then, x to the second power - x - 6 OVER x to the second power - 4 is equal to?

104. Alg 2/trig

I am doing Geometric sequences, but I cannot figure out how to find the Nth term of a geometric sequence. The problem is A1 = 64, Ak+1 = 1/2Ak (That is supposed to be A sub one, A sub k + 1, etc.) The formula for finding the equation is: An = A1 x R^n-1

105. similie/metaphor

Hi! I am trying to come up with metaphor/simile to say that writing a newsletter in microsoft word is very difficult ei discovered that writing an entire newspaper on Word rather than on Publisher was like trying to... ( do a greek puzzle blindfolded?)

106. AE....

outline the steps required for a multicultural education to be effective. Describe types of activities we could incorporate into a classroom that would support a multicultural education for all groups How could each group make a contribution to the

107. college

critical thinking 205 week 7 assignment. Need 2 arguments from "fears of 9/11" & what are they deductive valid or inductie strong & why

108. physics

here is my problem: a concave mirror forms a real image at 17.0 cm from the mirror surface along the principal axis. if the corresponding object is at a distance of 36.0 cm, what is the mirror's focal length? here's my work: 1/f = 1/v + 1/u where f=focal

109. chemistry

We did a LAB where we used a spectrophotometer to measure the absornency of a solution. It was a bluish color, so the question is.... What could be done to modify this experiment if the original solution was colorless? HINT: you can NOT add a coloring

110. English

Help me Edit this document please. Both Emily Dickinson and Walter Whitman used their poetry as a way to express transcendentalist ideas. Whitman wrote mostly about self-knowledge and spirituality while Dickinson wrote about the self knowledge and nature

111. MATH

Find the amount accumulated in the sinking fund if \$1600 is deposited quarterly for 20 years at 6% per year. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest dollar.)

112. chemistry

In the same experiment, we found the absorbance of three unknown solutions at 635 nm. How do i use this information to find Molarity? i believe it is M=moles/L but i don't have the moles or L

113. physics

here is my problem: a concave mirror forms a real image at 17.0 cm from the mirror surface along the principal axis. if the corresponding object is at a distance of 36.0 cm, what is the mirror's focal length? here's my work: 1/f = 1/v + 1/u where f=focal

114. social studies

Who called for completeself government for the settlers in the North west territory.

6x sq.-24

116. Math+Growth/Decay

3e^2x = G -3e^2x = G -3e^-2x = D 1/8e^2x = G -1/8e^-2x = D Would that be correct? I just made these examples up in my head. How can you tell if its growth or decay? I just look at the exponents. If is a negative then its decay? if its positive then its

117. English grammar

In the following sentence, what part of speech is the word "spent": This meant time spent working was wasted.

why is repeating things a good thing?

119. Science HELP!!

LCL is the height where air has cooled to the dew point. We can calculate LCL using temperature and dew point at the surface. Like temperature dew point also decreases with height because of decreasing pressure. Dew point drops at the "dew Point Lapse Rate

asked by Danger girl
120. Chemistry

Clapeyron equation: dp/dT = ΔS / ΔV My textbook says, for fusion/melting reactions: dp/dT = ΔH / (T ΔV) this implies that T * ΔS = ΔH. I know T * ΔS = q and at constant pressure, that equals H, but the dp/dT reaction is not at constant pressure.

121. physics

please check these: a laser can be used a. to treat glaucoma b. to measure distance c. to read bar codes d. all of the above D in a laser, all of the following forms of energy can be converted into coherent light except a. chemical energy b. electrical

122. Chemistry

The heat energy of ethanol is 29800J/g. A 355g can of beer contains 3.70% ethanol by mass. How many ethanol calories are in a can of beer?

123. essay

i need 3 essay i wrote but it is not ready yet can you improve and change my essay to ready... you can rewrite and improve... i hope how much is it? it is not too expensive... 1) Briefly describe an experience at SUNY Maritime that has had a positive

124. MATH

Find the periodic withdrawals for the annuity of \$400,000 at 4%, paid out monthly for 16 years. (Assume end-of-period withdrawal and compounding at the same intervals as withdrawal. Round your answer to the nearest cent.)

125. Indentifying Fallacies

Napoleon became a great emperor because he was short. Which fallacy is this?

126. math

a book is opened. The product of the two page numbers is 600. What are the two page numbers? Explain your thinking?

127. Indentifying Fallacies

Women need to be either brillent or beautiful to survive in this world. Which fallacy is this?

128. 4th grade math

I have to rearrange these letters CTEXINING to form a word describing mathematics. Could someone please help. I can't figure it out.

129. Physics

Can someone please help me sort out this problem? "A boy standing at the equator jumps vertically into the air. Does he land in the exact same spot after landing?" I'm thinking that when he jumps he is also moving horizontally with the earth and so he will

130. algebra/math

I have this figure of a square QRST with an equilateral triangle PQT sitting on top of the square. The figure looks like a little house... My question is if PQ equals 6 cm, then what is the area of the square? Do I need to find the area of the triangle to

asked by Mike 50
131. DRBOB

okay you talked about using a graph and we made one so this is the formula from it. y = 2.2019x y = absorbance x= concentration so if i have an absorbance of .02, do i do... .02/2.2019= .0091 .0091 would be x so it would be the concentration is this

132. English

I need a word for the following description: when children come into the world they`re vulnerable to like racism and sexist people and like all those things we are trying to prevent. What would you call those things (racism, sexism ect.)? One word

133. MATH HELP

Find the periodic payments necessary to accumulate \$20,000 in a sinking fund paying 4% per year, with monthly payments for 5 years. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest cent.)

134. math

2051 kids were surveyed on how they earn money. 47% said parents gave them money, 32% said allowance, 45% said odd jobs, 26% said part-time jobs, and 11% said full-time jobs. Estimate the number of teens who made each of the response and then find the

135. Chemistry

A 300 Calorie donut is used to heat 5.0 kg of water. If the initial temperature of the water is 20 degrees C what will the final temperature of the water be? Assume no heat loss to the surroundings

I need help with peer review. I am not good at doing the reviews. Healthy Foods and Its Benefits It is commonly known that there are foods that improve health when eaten. It is almost equally known that there are also foods that can drastically affect the

137. Chemistry

A quarter pound hamburger (115g) will rise the temp of 5kg of water 82.8 degrees C. A person uses about 100 Calories per mile when jogging. How many miles would a person need to jog to urn the Calories in one Hamburger?

138. human resources

at school i was asked to write a job letter. this letter will be send to a bank in order for that person to get a loan. whats the correct name of the letter?

139. Indentifying Fallacies

Homosexuals must not be allowed to hold government office. Hence any government official who is revealed to be a homosexual will lose their job. Therefore homosexuals will do anything to hide their secret, and will be open to dishonesty and blackmail.

I need help with my peer review What is the main point of this essay? What is the greatest strength of this essay? Does the introduction grab your interest and make you want to read on? Explain your answer. What material does not seem to fit the main point