Questions Asked on
September 13, 2007

  1. Chemistry

    I have worked this problem out a number of ways, but every answer I come up with is incorrect. I have posted my last answers underneath the question. Please advise. (a) What is the mass percentage of iodine (I2) in a solution containing 0.060 mol I2 in 105

    asked by Jim
  2. Chemistry 2

    A mixture containing KCLO3, K2CO3, KHCO3, and KCL was heated, producing CO2, O2, and H2O (water) gases according following equations: 2KCLO3 -> 2KCL + O2 2KHCO3 -> K2O + H2O + 2CO2 2CO3 -> K2O + CO2 The KCL does not reacnder the conditions of the reaction.

    asked by Pat
  3. Trig

    Use the half angle formula to find the exact value of tan 7 pie/8

    asked by Kay
  4. pre-algebra

    Please help me, help my son: a(a-c)=23, solve for the value of c Thanks

    asked by ingrid
  5. Physics

    Calculate the resultant of the pair of velocities 100km/h north and 75 km/h south. Calculate the resultant if both of the velocities are directed north. How do you do that

    asked by Kait
  6. World History

    The boundary line between North and South Korea was set at: a. the 17th parallel. b. the Yalu River. c. the 38th parallel. d. the city of Seoul.

    asked by Cody
  7. business calculas

    An apple orchard has an average yield of 38 bushels of apples/tree if the density is 24 trees/acre. For each unit increase in tree density, the yield decreases by 2 bushels. Letting x denote the number of trees beyond 24/acre, find a function in x that

    asked by sharon
  8. Calc 3

    A wrench .9m long lies along the positive y-axis, and grips a bolt at the origin. A force is applied in the direction of (0,1,3) at the end of the wrench. Find the magnitude of the force in newtons needed to supply 100 J of torque to the bolt. This is the

    asked by Raquel
  9. Calculus

    We're learning about different kinds of functions and I don't really understand the difference between rational and algebraic functions. I know that rational functions are functions that are a ratio of two polynomials, and algebraic functions are any

    asked by Kelly
  10. finance management

    Explain how efficient inventory management affects the liquidity and profitability of the firm.

    asked by manny
  11. Physics 1

    A subway train starts from rest at a station and accelerates at a rate of 1.60m/s^2 for 14.0 s. It runs at constant speed for 70.0 s and slows down at a rate of 3.50m/s^2 until it stops at the next station. What is the total distance covered?

    asked by Douchan
  12. Physics 1

    A hot-air balloonist, rising vertically with a constant velocity of magnitude v = 5.00 m/s, releases a sandbag at an instant when the balloon is a height h = 40.0 m above the ground. After it is released, the sandbag is in free fall. For the questions that

    asked by Douchan
  13. Chem 2

    A mixture containing KCLO3, K2CO3, KHCO3, and KCL was heated, producing CO2, O2, and H2O (water) gases according to the following equations: 2KCLO3 -> 2KCL + O2 2KHCO3 -> K2O + H2O + 2CO2 K2CO3 -> K2O + CO2 The KCL does not reacnder the conditions of the

    asked by Pat
  14. To "bad@math" (and other names)

    Please post under one name. Please do not post to demand that someone go back and answer your previous questions. A math volunteer will get to them when he/she can. Thanks.

    asked by Writeacher
  15. chemistry

    NH4NO3 --> N2O + 2H2O you start with 1000g of ammonium nitrate, what is the theoretical yield of laughing gas? How many grams of water will be produced. *I know you COULD have 450.234g of H20, but I'm not sure how to do the theoretical yield.

    asked by samantha
  16. Chemistry

    Questions about ionic radius... Why do the noble gas elements not have ionic radii? Why do boron, carbon and silicon not have ionic radii? What observations can be made regarding the ionic size for the transition elements along each period. Thanks for your

    asked by Lucy
  17. science

    1.Describe how a population differs from a community using your own examples. 2.Describe how an ecosystem differs from a community using your own examples. Please please help. thanks.

    asked by kim
  18. Preschool/Storytelling

    Would you please look over my answers to these questions and see if you agree that I have chosen the best answer. If my answers are wrong-please let me know. 1. When storytelling,memorization is: A. a good idea for phrases or sections that are repeated in

    asked by Brenda
  19. World History

    The most serious confrontation between the United States and the Soviet Union during the Cold War involved the: a. Bay of pigs invasion. b. Falklands/Malvinas War. c. Cuban Missile Crisis. d. invasion of Grenada.

    asked by Cody
  20. Psychology

    I am doing a project where I have to illustrate the collective unconscious of my culture. The question is what symbols and archetypes are in your culture. I am using the archetypes the mother, and the hero. My problem is I don't know how this collective

    asked by Christian
  21. Physics

    A bicyclist accelerates -0.87 m/s/s during a 3.8 s interval. What is the change in velocity of the bicyclist and the bicycle? For this problem, I used the formula 'change in v = a x t" and came up with -3.306 m/s as my answer. Is this right?

    asked by Lindsay
  22. Physics

    Calculate the Magnitude of the resultant of a pair of 100-km/h velocity vectors that are at right angles to each other.

    asked by Jon
  23. Chemistry

    If the density of mercury is 13.6 g/ml, what is the mass of 3.0 liters of mercury in: Grams? Pounds?

    asked by Ayeisha
  24. organic chemistry

    I need to draw the structure of 4-Hexenal. I understand that "hex" means it is a 6 carbon chain and the 4 tells me the aldehyde group ("al")is off the 4th carbon. My problem is how to draw the parent chain. I tried it with 6 carbons in a straight line then

    asked by AMY
  25. Chemistry

    I have tried to solve this problem, but I keep getting it wrong. Please advise on this question.My answer will be listed under the problem. An ore contains 2.79 g of silver per ton of ore. What is the concentration of silver in ppm? My Answer: 0014164.8

    asked by Jim
  26. Math

    Ten people can paint 60 houses in 120 days, so five people can paint 30 houses in:

    asked by Anonymous
  27. science

    to be considered ______, something must exhibit all of the _________ of life.

    asked by Stephen Joyce
  28. Math

    I am tring to finish my 10th grade. I got hurt last Jan. 2007. And was force to quit public school. In short of every. I started online schooling and I have to write an essay for a final grade in Math compare three college to each other and make a graph

    asked by Cody
  29. ap chem

    A certain volume of a .50 M solution contains 4.5g of a certain salt. What mass of the salt is present in the same volume of a 2.5 M solution? Indicate the concentration of each ion/molecule: A mixture of 50.0 mL of .2M KClO3 and 25.0 mL of a .20M Na2SO4.

    asked by lily
  30. Physics

    A hot-air balloonist, rising vertically with a constant velocity of magnitude v = 5.00 m/s, releases a sandbag at an instant when the balloon is a height h = 40.0 m above the ground. After it is released, the sandbag is in free fall. For the questions that

    asked by Karla
  31. Physics

    If a vector that is 1 cm long represents a velocity of 10 km/h, what velocity does a vectory 2 cm long drawn to the same scale represent?

    asked by Tim
  32. physics

    what kind of errors of the procedural, systematic, and random errors could possibly occur while finding the mass of a burning candle by placing a candle on an electronic scale and lighting it?

    asked by jel
  33. Preschool/child dictation

    Can you help me with this? Jason was dictating a story about his pet hamster to his teacher. He said,"He climb to the top of his cage and jump down. He be fast." The teacher should: A. write,"He climb to the top of his cage and jump down. He be fast." B.

    asked by Anonymous
  34. lab procedures

    After reconstitution with 1.5 ml diluent, a 500 mg vial of ceftazidime injection yeilds an approximate volume of 1.8 ml.Each ml contains approximately 280 mg.If 500 mg IM are ordered, how many ml should be administered?

    asked by GENE
  35. Science

    How do you convert quarts into liters? i'm so confused.

    asked by Jeannie
  36. math

    Jacob walked three blocks to pings house, then five blocks to jamals house. Write a sentence to show that the distance from pings to jamals is the same as the return walk home. Name the property illustrated in your sentence.

    asked by Taylor
  37. Physics

    A freight train traveling with a velocity of -4.0 m/s begins backing into a train yard. If the train's average acceleration is -0.27 m/s/s, what is the train's velocity after 17 seconds? Can someone tell me which formula to use for this?

    asked by Lindsay
  38. math - fractions

    Hello, I need help for my 5th grader...Solve the problem by working backward. Write the ans. in a compl. sentence. Mara followed a recipe she found on the net to make her own perfume. She started by adding jojoba oil to a small bottle. Then she added 2

    asked by Johanna
  39. the word environmental science

    can Someone put environmental science in a sentence. like bob studyied environmental science. but i don't know what it means to well soihave to be spacific. can u help me?

    asked by cole
  40. are there any other free hw help sights?

    are there any other free hw help sights?

    asked by help on hw
  41. Algebra 1

    question One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number.

    asked by Felica
  42. Art History

    I am having difficulty finding information on Chinese art that was controlled by the government. Any suggestions?

    asked by Janna
  43. english

    I need a title for a narrative about my fear of snakes and the time one got loose in our classroom. Any witty ideas?

    asked by Mischa
  44. science

    how old is the sun and the planets? how did the solar system form? what is a good website i can get this information from?

    asked by christina
  45. World History

    Short answer describing the cold war, including examples that show how the war influenced events in the postwar perioc.

    asked by Cody
  46. math?

    Give the answer to the following calculation with the correct number of significant digits. Report your answer in scientific notation. (6.17 x 10-1 + 4.9 x 10-2) x (3.95 x 10-2 + 6.454 x 10-3) i know how to solve for the answer, i just don't know the

    asked by des. student!
  47. College Algebra

    Factor over the reals completely 32a^4b-18b^3

    asked by Heather
  48. social studies

    What are some of the forces that change earth's surface

    asked by robin
  49. science

    Im doing a science fair project on how fertilizer and sun effect the growth of grass

    asked by bryan
  50. MATH/CHEM PLEASE HELP!

    Give the answer to the following calculation with the correct number of significant digits. Report your answer in scientific notation. (6.17 x 10-1 + 4.9 x 10-2) x (3.95 x 10-2 + 6.454 x 10-3) i know how to solve for the answer, i just don't know the

    asked by Jade
  51. Math

    Okay .. did you see my last answer? I think it is 5 But now I have another one and I think I know the answer but there is a trick question at the end. Maybe you can tell me if it is a trick or if it something I am missing. A golf classic starts with 64

    asked by Emily
  52. Algebra

    Could you please check my answers and help me with one? Find the domain of the function. f(x)=-8x-2 -I got the domain being (negative infinity, postive infinity). g(x)= 3x/x^2 -49 (This one I don't understand how to find the domain)

    asked by Soly
  53. Algebra 1

    Solve variable in terms of the remaining variables A = P(l + rt) for r

    asked by Pat
  54. math.chem

    Give the answer to the following calculation with the correct number of significant digits. Report your answer in scientific notation. (6.17 x 10-1 + 4.9 x 10-2) x (3.95 x 10-2 + 6.454 x 10-3) i know the answer is 0.0306, but how many sigfigs should the

    asked by Jade
  55. U.S. History

    what did secretary of state John Hay call for in the Open Door Policy

    asked by chris
  56. Preschool

    Hi,I need help on a couple of questions. Please give your opinion on each question and let me know if you feel my answers are wrong. (Thanks) 1. Using an attache case for a flannel board is not a good idea when: A. you are presenting to only one child. B.

    asked by Brenda
  57. Algebra-One to one function

    Could you please check my answers and help me with one of them? Find the inverse of the one to one function 1. f(x)-4x+7 -I got f^-1(x)=x-7/(-4) 2. f(x)= square root of x-8 -I got f^-1(x)=x^2-8 3. f(x)=4/(5x-1) This one I don't understand how to find the

    asked by Soly
  58. Linear Equation

    I posted a question below but forgot to put in the equation! So sorry. The problem states: Find 2 numbers that satisfy the equation then graph it. The equation is 2y+2=0 I think one of the numbers is -1, but what could the other be or am I doing the

    asked by Betty
  59. English

    I asked this question a couple of days days ago and noone was really sure. "Let me in," Said the pin. Which is this an example of: 1. assonance 2. a metaphor 3. alliteration 4. personification I know it's either assonance or alliteration.

    asked by Anonymous
  60. chemistry

    How many ml of a .25M HCL would be required to neutralize completely 2.5g of NaOH

    asked by samantha
  61. chem

    ---------- A compound has the formula Mg3X2. If 1.87 g of X combines with 4.86 g of magnesium, what is the atomic weight of X? A) 7.0 B) 14.0 C) 21.0 D) 28.0 E) 32.0 ---------- I'm having a really rough time with this one. It seems the total weight is 6.73

    asked by manny
  62. ALGEBRA(sorry I forgot this one)

    4. -2xsquared+3x-7 when x=4

    asked by bad @ math
  63. Trigonometry

    find the exact value of: tan 7pie/12

    asked by Kay Again
  64. Math

    Write a mathematical sentence to describe each problem situation. 1. The Length of a ruler is at least 12 inches. 2. Tomas is at most 14 years old. Please help because I do not know how to do this! Thank you so much.

    asked by Chris
  65. math algebra

    20(1/5n-3/4)+9n if n = 4

    asked by lisa
  66. math algebra

    20(1/5n-3/4)+9n in need of the simplified answer i came up with the same as you but it is not one of my possable multiple answers

    asked by lisa
  67. Algebra 1

    Solve the system by addition. 5x-3y=13 4x-3y=11

    asked by Cynthia
  68. Chemistry

    you used 10 pennies to find the average atomic mass.... why did you do this, why not just find the mass of one penny?

    asked by Karissa
  69. Science

    why do you think Scottish hares grow a white coat in winter why hares in the south of England don¡¦t do the same.

    asked by Anonymous
  70. Science

    Why do most plants flower later in Scotland than they do in the south of England?

    asked by Anonymous
  71. english 3

    what attitude does everyine have

    asked by sherry lovett
  72. INB

    1.Why is an exporter that is to be paid in six months in a foreign currency worried about fluctuating foreign exchange rates? 2.Are there ways in which this exporter can protect itself? If so, what are they? 3.How does the credit or money market hedge

    asked by BOBBY
  73. Lincoln School

    what is a polygon?

    asked by Josh
  74. Repost Math for Steve Dowling

    Math - steve dowling, Thursday, September 13, 2007 at 8:44pm what is -5/18 (8/15)= Can you show the work Thanks

    asked by Ms. Sue
  75. I think you didnt see my question ^^ help please!

    Hi!!! I didn't understand these problem, so I was wondering if you could explain how to do them for me. I was going to ask the teacher but she had already left the campus. Thank You!! Questions: When an increase in the value of one variable quantity

    asked by Jason
  76. Science

    Can you recommend some good website to use for this project? I get computer stumped sometimes. I have read where people want you to do the project, I’m not, I just need your help to recommend some good website to gather this information.

    asked by Mel
  77. social studies

    what are the 5 layers of the earth and are they liquid or solid?

    asked by robin
  78. math

    Next 3 in pattern 2/19, 27/76, 46/76, 65/76

    asked by Tim
  79. Physical Education

    How do you define the phrase "expontial results"?

    asked by M
  80. Science

    What are examples of insolubles?

    asked by Amy
  81. Spanish

    We're supposed to translate the following sentence into spanish: It smashed cars and destroyed buildings. The verb our book told us to use for "smashed" is "hacer pedazos." Would you say "Hizo pedazos los coches..." or "Hizo pedazos de los coches..." or

    asked by Kayla
  82. Discrete Mathematics

    I am having trouble using modus ponens and all the rules of inherence. By any chance do you guys have a link that can explain these concepts in more detail. I've tried multiple books and links...and haven't found a good website that shows this types of

    asked by manny
  83. Algebra

    Find the domain of the function g(x)= 3x/x^2 -49 I try to figure it out it, and since x^2-7 is a perfect square (x+7)(x-7), I thought x couldn't be +-7?

    asked by Soly
  84. science

    Is the gulf stream an open or closed system?

    asked by jason
  85. S.S

    I have a quiz tommorow and I need help finding away I can remember the top ten mager wars we have had in order that they happened. Please help me. I have tried but it gose in one ear and out the other. Thank You

    asked by titi
  86. Can someone answer this question?

    Does a England hare hibernate?

    asked by Anonymous
  87. Math

    Here's the direction I was given: Write an expression for the sequence in each table. 1 - 8 2 - 13 3 - 18 4 - 23 5 - 28 n - ___ Would I write n = 28+5 ?

    asked by Parker
  88. math

    How do you solve equations with variables on both sides?

    asked by Tolu
  89. LAB PROCEDURES

    GENTAMICIN SULFATE INJECTION IS PRESCRIBED "IM" IN THREE EQUALLY DIVIDED DOSES,DOSAGE BASED ON THE FORMULATION 3mg/kg/day.How many ML should be administered per dose to a 110-lb patient if a vial contains 40mg/ml ?

    asked by GENE
  90. math algebra

    20(1/5n-3/4)+9n in need of the simplified answer i came up with the same as you but it is not one of my possable multiple answers thanx

    asked by lisa again
  91. science

    how do u convert tons into kilograms?

    asked by jake
  92. Can someone tell me what this sentence means?

    Television has created a global village, consequently, stereotypes are disappearing.

    asked by Anonymous
  93. science

    what is the difference between water on the surfaace of crystals and hydrate water itself?

    asked by martina
  94. Science

    Y does a england hare not grow white fur?

    asked by Anonymous
  95. Language

    I wnat to see if I got this right, the first one is what it looked like before I made changes. There should be 5 changes. What fun the zoo is. we love it. I feed the elephants but their trunks tickle me. I buy zoo food other food may make them sick. What

    asked by Samantha
  96. inb-help

    1.Why is an exporter that is to be paid in six months in a foreign currency worried about fluctuating foreign exchange rates? 2.Are there ways in which this exporter can protect itself? If so, what are they? 3.How does the credit or money market hedge

    asked by BOBBY
  97. World History

    Biafra tried to secede from Turkey. ( True or False )

    asked by Cody
  98. World History

    Ghana was the first SubSaharan nation to win independence after 1945. ( True or False )

    asked by Cody
  99. World History

    Portugal's military coup of d'etat of 1974 gave the country of Mozambique its independence. ( True or False )

    asked by Cody
  100. College Algebra

    3x^-2+3/2x^2

    asked by Heather
  101. inb

    1.How would you accomplish exposure netting with currencies to two countries that tend to go up and down together in value? 2.Some argue that translation gains or losses are not important so long as they have not been realized and are only accounting

    asked by BOBBY
  102. Math

    Ha! Mom said if I could find help online to go for it so here I am asking for your help. Here is one problem she gave me from a page called Superstars. Mr. Jackson is preparing bags of treats to give trick or treaters. He has 48 pieces of candy and 60

    asked by Emily
  103. Math

    Name the difference between these #'s: 3 6 9 35

    asked by Anonymous
  104. Algebra

    Hi!!! I didn't understand these problem, so I was wondering if you could explain how to do them for me. I was going to ask the teacher but she had already left the campus. Thank You!! Questions: When an increase in the value of one variable quantity

    asked by Jason
  105. Geometry

    I need to solve the following: "write a mathematical sentence to compare each pair of measure 1 GB and GF 2 FJ and JC 3 AC and AD" Please help

    asked by Renee
  106. Math

    Let f and g be two odd functions. Prove that: a) f + g is an odd function b) g of f is an odd function I am not even sure where to start, any help that can be provided would be appreciated!

    asked by manny
  107. inb

    1.How and why would a seller make a sale to a buyer that has no money the seller can use? In the event that the seller does not need the money, the seller will gain by holding PAPER. In this event I sell you the house, you pay the closing costs and sign

    asked by BOBBY
  108. Human Service Administrator

    What ethical issues might arise by relying more and more on technology in Health Care or Human Service?

    asked by Marie
  109. please help me

    1.How would you accomplish exposure netting with currencies to two countries that tend to go up and down together in value? 2.Developed country partners in countertrade contracts have had problems with quality and timely delivery of goods from the

    asked by BOBBY
  110. Business Technology

    Do Tariffs help us to maintain a favorable balance of trade and balance of payments?

    asked by c
  111. World History

    short essay decribing the economic, political,social, and cultural problems, faced by the new nations of Africa.

    asked by Cody
  112. Science

    I have to develop a plan to assist a developing country with its food and water supply. The country can be either Central Africa or Rwanda Can you recommend some good website to use for this project?

    asked by Jan
  113. Antomy

    The nucleus of the cell is the site or RNA synthesis, largest organelle in eukaryotes, and has a double membrane. True or false

    asked by Amanda
  114. inb

    Developed country partners in countertrade contracts have had problems with quality and timely delivery of goods from the developing country partners. How are they trying to deal with those problems?

    asked by tammy
  115. Math

    I have a problem in graphing that says: Find 2 numbers that satisfy this equation, then graph. The graphing I can do but am having trouble finding 2 numbers. I thiink that one of the numbers is -1. What could the other one be? Thanks so much in advance!

    asked by Betty
  116. AP ENGLISH

    whats a sentence for the word acuity?

    asked by MARISOLD
  117. physics

    Im having severe trouble understanding the concept of Dimensions. And with 300 other students in my physics class the Professor doens't have alot of time for individual students.... The volume of a liquid flowing per second is called the volume flow rate Q

    asked by manny
  118. Math

    Find the derivative of the quotients: y=4X/(X-3) --What would (x-3) be?

    asked by Rachel
  119. Algebra-Functions

    Could you please check my answers and help me with two problems? Determine which two functions are invereses of each other. 1. f(x)=5x, g(x)x/5, h(x)5/x -I got that f(x) and g(x) are invereses of each other 2. f(x)=x-2/(2), g(x)=2x-2, h(x)=x+2/(2) -I got

    asked by Soly
  120. biology

    Whats the width of the north american tectonic plate?

    asked by lizzie
  121. Math

    Where can I find a online calculator online?

    asked by Mandy
  122. riddle

    what comes before god poor people needs it rich people don't and if you eat it you will die

    asked by latifah
  123. Econ/Math Derivatives

    Find the derivative of the quotients: y=4X/(X-3)

    asked by Rachel
  124. Biology

    Why would the population of mountain lions increase in the past 10 years even though humans were expanding into the mountain lion's habitat?

    asked by Maggie R.
  125. science

    I'm forgetting, have scientists attained a means of fussion or fission as of yet.

    asked by manny
  126. Vectors

    Find the distance from P(2,5,5) to the line x=0,y=5+5t,z=5+t Can anybody help me with this problem. I know the formula: d=QPxQR / |QR| Not sure how to get point Q and R tho.

    asked by Mike
  127. ALGEBRA

    Evaluate the expressions: 1. -8x when x=6 2. 3xsquared-5x when x=-2 3. -4((the absolute value sign) y-12 (the absolute value sign))when y=5

    asked by bad @ math
  128. biography-buying

    J. K. Rowling A Biography (Hardcover) by Sean Smith (Author) Can I find this at any book store, such as F.Y.I.,etc, what about Target or WalMart?

    asked by need info. on where to buy a bio.
  129. also...

    is this book authorized?

    asked by need info. on where to buy a bio.
  130. french

    What does the phrase "je suis aller" mean?

    asked by he who must not be named
  131. History

    If an interview is being read...who is the speaker of the story..the interviewer or the person answering the questions in the article?

    asked by Maggie R.
  132. history again..

    were learning abo0ut the industrial revolution and i was wonder what this meant... "what is your business?".answer:"I follow the clothes- dressing at present"

    asked by Maggie R.
  133. biochemistry

    why does the hydrolysis of peptide bonds work best in the conditions: (Acid) M HCL @ 110-120 C 12-48 hours. Than the conditions: (Base) 2-6 M Naoh @ 100 C ~24 hours?

    asked by Krystal
  134. com215

    need to know what this assingment means; find an ethnic group to you personally and write about it. Does he want us to find our ethnic group or what?

    asked by nicole