Most popular questions and responses by Astrid
  1. chemistry

    Compare a mole of Ag-108 and a mole of Pt-195 using atoms, protons, electrons, and neutrons.

    asked on March 11, 2010
  2. Chemistry

    How many carbon tetrachloride (CCl4) molecules are in 3.00 mol of CCl4? How many carbon atoms? How many chlorine atoms? How many total atoms? I have no idea how to do all of this =\

    asked on March 14, 2010
  3. chemistry

    Identify the quantity that is calculated y dividing the molar mass of an element by Avogadro's number. I don't get this question..?

    asked on March 10, 2010
  4. chemistry

    In a laboratory setting, how would you determine if a compound was a hydrate?

    asked on March 31, 2010
  5. algebra

    Fiona and Greg play a number guessing game. Greg gives Fiona this hint about his two secret numbers, "The product of the two consecutive positive integers that i am thinking of is 11 more than their sum." What are Greg's numbers?

    asked on March 19, 2008
  6. Geometry

    Write these definitions using the classify and differentiate method to fill in the blanks: a. An octagon is __________ that ___________. b. A concave polygon is __________ that ___________. c. A 20-gon, also called an icosagon, is __________ that

    asked on September 7, 2012
  7. Biology

    -Rank the following terms from simplest to most complex: cells, organelles, organs, tissue, organism. -If a cell is like a school, then the nucleus would be...? -Which organelle serves as a "workbench" for the ribosomes?

    asked on December 4, 2008
  8. Math

    Kate wants to build a fence around her garden to prevent rabbits from eating her vegetables. The rabbit fencing costs $7.50 per metre. How much will it cost to enclose a square garden with an area of 144 m2?

    asked on July 15, 2015
  9. Math

    For what values of y: is the value of the fraction (7−2y)/6 greater than the value of the fraction (y−7)/12 ?

    asked on November 12, 2018
  10. chemistry

    Sodium carbonate reacts with hydrochloric acid as shown below in an unbalanced chemical equation. What mass of CO2 is produced from the reaction of 2.94g Na2CO3 with excess HCL?

    asked on August 3, 2011
  11. Chemistry

    What are two differences between the red and green electromagnetic waves in a rainbow?

    asked on December 2, 2009
  12. algebra

    A ladder is resting against a wall. The top of the ladder touches the wall at a height of 15 feet and the length of the ladder is one foot more than twice the distance from the wall. Find the distance from the wall to the bottom of the ladder. (Hint: Use

    asked on April 2, 2008
  13. Literature

    Out of the way of human life, tenderness, or the glance of heaven? -from "In the Jungle" by Annie Dillard What does this question mean?

    asked on May 4, 2009
  14. reading

    What is the climax of the book Among the Free by Margaret Peterson Haddix? Also, what is the setting (time and place)? Thank you!

    asked on January 2, 2008
  15. algebra

    The drama club is building a backdrop using arches whose shape can be represented by the function f(x)=-x^2+2x+8, where x is the length in feet. The area under each arch is to be covered with fabric. -What is the length of the segment along the floor of

    asked on May 8, 2008
  16. books

    What is the author's tone of Maniac Magee? Is it light-hearted, humorous, serious, sarcastic, intense, or depressing? What do you think? I think it's serious but i can't explain why. Is it because even though people think Jeffrey is a crazy kid, the author

    asked on August 6, 2007
  17. MATH

    THE SCALE OF A MAP IS 0.5 IN :25MI THE ACTUAL distance between two cities is 725mi write a proportion that represents the relationship how far apart will the cities be on the map

    asked on November 7, 2013
  18. Chemistry

    What are intermolecular forces? What do intermolecular forces have to do with the states of matter? I tried googling it, but they gave me really fancy answers and i need something that i will be able to understand

    asked on September 29, 2009
  19. algebra

    Sean and Barry are practicing in a 30-mile bike race. Sean averages 20 miles per hour and Barry averages 15 miles per hour. Howm many miles will Barry be from the finish line when Sean finishes the race?

    asked on April 22, 2008
  20. Geometry

    Use your geometry tools to draw a convex hexagon with two consecutive sides measuring 5 cm and three consecutive angles measuring 130°

    asked on September 8, 2012
  21. Biology

    1. Cytosol is what? a. none of these b. all of the organelles c. cytoplasm + nucleoplasm d. cytoplasm e. cytoplasm + organelles 2. What type of cell does not divide by Mitosis? a. bacteria b. prokaryotic c. eukaryotic d. fungi e. algae

    asked on December 30, 2008
  22. science

    Is concrete a heterongeneous or homogeneous mixture? Your exact answer here:

    asked on June 10, 2007
  23. science

    What gas do you think is in the bubbles that form when NaHCO3 (sodium bicarbonate) and C6H8O7 (citric acid) react? Why?

    asked on January 19, 2008
  24. spanish

    How did the geography influence the immigration for the exploration in Colombia and Venezuela? How did the indegenous mix with the Europeans to develop the culture in Colombia and Venezuela? I've tried many websites such as fact monster, wikipedia,

    asked on December 6, 2007
  25. Science

    Which of the foolowing occurs when a mass of air rises into the atmosphere? A) it becomes warmer because the particles move closer together B) it becomes cooler because the particles move closer together C) it becomes cooler because the particles move

    asked on April 4, 2012
  26. Science

    How does the process of upwelling affect the distribution of life in the ocean? A.It keeps the salinity of the ocean constant. B.It replaces polluted water near shore with clean water. C.It replaces nutrient-depleted waters with nutrient-rich waters. D.It

    asked on March 26, 2012
  27. chemistry

    we did a bunsen burner lab where we burned paper clips. We burned it for about 10 seconds then cooled it in water. I know this is a physical change but i need to come up with 3 chemical changes that occured. I already came up with the water vapor that

    asked on October 26, 2009
  28. chemistry

    How do you do conversions? For example: Convert 360 s to ms

    asked on October 5, 2009
  29. Biology

    Cross a roan bull with a roan cow. I need to know the key and the punnet square

    asked on February 11, 2009
  30. science

    Erin must perform a science experiment. She needs to dissolve 10 g of salt in 250 ml of water. She measures the water incorrectly and dissolves the 10 g of salt in 350 ml of water. Now she has no more salt. Explain what Erin can do to make the solution

    asked on April 29, 2008
  31. algebra

    Write two numbers so that: -The first number is less than the second number, and -the absolute value of the first number is greater than the absolute value of the second number.

    asked on April 21, 2008
  32. science

    I'm doing a research paper on whales. I need to know how they lost their legs and went to the waters. I also need to know why they went to the waters.

    asked on April 16, 2008
  33. spanish

    What were the indegenous people of Peru called? All I know is that they were not called the Incas.

    asked on February 12, 2008
  34. math

    The sum of the digits of a two-digit number is 14. If the numbers are reversed, the new number is 18 less than the original number. Find the original number. I know Ana asked this question, but i don't understand how to get the equations.

    asked on January 6, 2008
  35. spanish

    -how and why did people go to ARgentina and Chile? -What traditions, events, and ideas helped form the identity of ARgentina and Chile? -What facotrs (geographic, economic, and political) allowed each country to grow and prosper? -What does El Cristo de

    asked on October 10, 2007
  36. chemistry

    Why is there one large increase in ionization energies for each element? Which atoms form ions that are larger than the atoms? I have a test tomorrow and these are the questions I have troubles understanding.

    asked on December 14, 2009
  37. Earth/Space Science

    How does damage to the ozone layer cause a threat to humans? A. It increases radiation of heat from Earth into space. B. It allows damaging infrared radiation to penetrate the atmosphere. C. It allows damaging ultraviolet radiation to penetrate the

    asked on April 2, 2012
  38. math

    Which other country besides the U.S. uses the English metric system?

    asked on September 30, 2009
  39. history

    I have to do a Current event about any culture around the world so I have to find articles online. I tried googling but it doesnt help much, can someone help please? Thank you!

    asked on September 17, 2009
  40. literature

    in my sister's keeper, the novel, how are jesse and brian alike? how do they understand each other better at the end of the story?

    asked on August 22, 2009
  41. algebra

    Can I have a brief summary about Sierpinski's Triangle? Also, what is a conflict resoultion dealing with discrete math?

    asked on May 2, 2008
  42. algebra

    Cystic fibrosis is inherited from parents only if both have the abnormal CF gene. Children of two parents with the CF gene will either be affected with the disease, a carrier but not affected or not have the gene. -Write an expression for the genitec

    asked on March 5, 2008
  43. spanish..i need help

    How and why did people go to Argentina and Chile? please help. Thank you!

    asked on October 10, 2007
  44. Biology

    two negative effect of direct artificial selection?

    asked on March 4, 2012
  45. History

    What is the history of the Temple Mount? I've been looking up a lot of information for this but some of it is too much and I need a more condensed infomation.

    asked on March 19, 2010
  46. Biology

    How could one change in a DNA nucleotide alter the formation of the translated protein?

    asked on March 26, 2009
  47. algebra

    Write four different numbers for which both of these statement are true. -The range is 8 -The mean and median are the same number

    asked on April 23, 2008
  48. math

    Wouldn't the absolute value of 0 be 0 right?

    asked on April 21, 2008
  49. algebra 1

    I don't know how to factor this polynomial. r^3+6r^2+11r+6 Please help.

    asked on April 5, 2008
  50. science [help please]

    Why can salt water be considered both a mixture and a solution? Describe what is happening at the particle level when an M&M dissolves.

    asked on March 17, 2008
  51. science

    Is it possible for ice in your freezer to be below 0 degrees celsius? Explain it to me please.

    asked on March 4, 2008
  52. Earth/Space Science

    Which of the following is responsible for absolute sea-level changes? A. formation and melting of ice sheets B. erosion of land surfaces by wind and water C. human activities along coastlines, such as development and grading D. movements of a tectonic

    asked on March 20, 2012
  53. Earth/Space Science

    Why are icebergs in shipping lanes so hazardous?

    asked on March 18, 2012
  54. Math

    If a recipe calls for 6 cups of juice for each of the eight punch bowls, how many gallons of juice will be needed?

    asked on February 23, 2012
  55. Chemistry

    What is the maximum volume of 30 M NaCl that can be prepared from 60 g NaCl(s)?

    asked on November 14, 2010
  56. Chemistry

    I am doing a report on the composition of the Olympic medals. I need to know what the values are for each medal? Is there a website?

    asked on February 25, 2010
  57. geometry

    What is the relationship between the number of vertices of a regular polygon and the number of summetry lines of the polygon?

    asked on December 7, 2009
  58. chemistry

    Can someone show me a website that talks about spectrums of elements. Including why they're all different, like basic information of spectrums. The why, how, and what.

    asked on November 12, 2009
  59. English

    I have to write an essay about three 'heroes' so I chose Batman, Harry Potter, and Hercules. But I need to know what they have in common so any ideas?

    asked on May 17, 2009
  60. Biology

    Which of the following do NOT have a mesoderm? A. Jellyfishes B. Earthworms C. Flatworms D. Octopi E. Snails

    asked on May 5, 2009
  61. Literature

    I have an essay for Romeo and Juliet, asking if Friar Laurence should be punished for his involvement in the marriage. I said that he shouldn't be punsihed because he was trying to end the feud and that Romeo and Juliet would have still be together even if

    asked on April 29, 2009
  62. biology

    If iodine and water are mixed together and form a clear yellow solution and then cornstarch is added to iodine and form a dark brown color, what is the signifigance of the two different colors? Which one showed a positive presence of a sugar?

    asked on November 20, 2008
  63. biology

    If the pH of a sample was 3 how many times more acidic is it than a solution with a pH of 6?

    asked on November 2, 2008
  64. algebra

    Is there a website that could give me information on the sierpinski triangle and sierpinski pyramid? Please and thank you.

    asked on June 12, 2008
  65. spanish

    How does the environment, climate, terrain effect the interaction between man and nature in Bolivia, Paraguay,and Uruguay?

    asked on June 4, 2008
  66. algebra

    Construct a set of ten numbers that have a mean of 8, median of 6 and a mode of 5. Please help. Thank you!

    asked on April 24, 2008
  67. science

    Why can salt water be considered both a mixture and a solution? Describe what is happening at the particle level when an M&M dissolves.

    asked on March 17, 2008
  68. science

    Describe what happens at the particle level and what happens to a liquid's temperature when it reaches the liquid's heat of fusion. Is it possible for the ice in your freezer to be below 0 degrees celsius? explain. When does ice in your freezer reach

    asked on March 4, 2008
  69. civics

    Can someone give me a website about segregation facts that is still happening now?

    asked on February 6, 2008
  70. science

    what are the differences between minerals and rocks?

    asked on December 12, 2007
  71. science

    How might sand form in nature?

    asked on October 8, 2007
  72. Anatomy and Physiology

    Which organic compounds and cellular organelles are involved in protien synthesis? For these answers please browse:

    asked on October 8, 2006
  1. English

    online casino games casino games casino slots slot game slot online

    posted on October 28, 2018
  2. Spanish

    I believe Ecuador is not part of the Caribbean basin

    posted on January 19, 2018
  3. Algebra


    posted on September 3, 2017
  4. math

    The answer is 16 because it has the following factors 1,2,4,8,and 16

    posted on December 19, 2016
  5. life orientation

    Sexism,racism, xenophobia

    posted on May 1, 2016
  6. Earth/Space Science


    posted on March 20, 2012
  7. chemistry

    Thank you so much!

    posted on March 31, 2010
  8. Social Studies

    Thank you but I decided to do how the World Wide Web was available on the Internet on August 6, 1991, but I can't find an article. Are there any websites I could use?

    posted on December 3, 2009
  9. chemistry

    It was supposed to be a ratio and using exponential notation and skipping a step in cross multiplying, but it's very confusing how she did it.

    posted on October 5, 2009
  10. chemistry

    My teacher taught me a different way but it's very confusing. She used exponential notations. For example, how many milligrams equals 1 gram? she did: x/1 milligram= (1.0g x 10^0g) 1 milligram/ [all over] 1.0 x 10^-6 which equals 1.0 x 10^6 milligram

    posted on October 5, 2009
  11. literature

    yes i've read the book some of my ideas are that they need to know they can command one uncontrollable thing, like brian said in the book since they are always in the sidelines when it comes to taking care of kate's illness but i need to expand it more and

    posted on August 22, 2009
  12. Literature

    Well the story is about the author's experiences in the jungle (the Amazon) and how it's so beautiful to her, like home but with dangerous situations like weather conditions and wild animals. It's also asking what might be her purpose in describing both

    posted on May 4, 2009
  13. Literature

    I typed it out but I'll try again. Out of the way of human life, tenderness, or the glance of heaven? -from "In the Jungle" by Annie Dillard I don't understand what this question means from the story and I need to know it so that I can do my essay.

    posted on May 4, 2009
  14. science

    How can she make sure its 100 ml?

    posted on April 29, 2008
  15. science

    So if she lets the water evaporate, she can use the remaining salt to use it in another cip with 250 ml of water

    posted on April 29, 2008
  16. science

    She can't add more salt because she has no more salt.

    posted on April 29, 2008
  17. algebra 1

    That is confusing. We aren't learning it that way.

    posted on April 5, 2008
  18. algebra

    I get it now. I messed up on (2x+1)^2. I didn't simplify it right. Thank you guys so much.

    posted on April 2, 2008
  19. algebra

    I tried that but it didn't give me a quadratic equation and that's what we've been studying.

    posted on April 2, 2008
  20. algebra

    Okay thank you so much!

    posted on March 19, 2008
  21. science

    Right. Okay Thank you.

    posted on March 4, 2008
  22. science

    So more kinetic energy can be taken away from the ice?

    posted on March 4, 2008
  23. spanish

    Thank you. My teacher said that it wasn't the Incas because that was the name of the emperor. He was called the Inca. However I still don't know what they were called.

    posted on February 12, 2008
  24. science

    I think the gas is carbon dioxide or oxygen cus water is H2O, so which one is right?

    posted on January 19, 2008
  25. math

    So the answer would be 86?

    posted on January 7, 2008
  26. math

    I don't understand how to get the second equation

    posted on January 6, 2008
  27. spanish

    i read that one a while ago and I kept reading throught the sights maggie and wilma had, but i still cant answer the questions. So far i know that Europeans were attracted by the gld that the countries had, but i don't know what else and the answer to the

    posted on December 6, 2007
  28. science

    ok thank you so much

    posted on October 8, 2007