Most popular questions and responses by Yasmin
  1. chemistry

    When calcium chloride and ammonium phosphate are mixed, an insoluble precipitate of calcium phosphate forms and falls out of solution. After careful analysis of the purified precipitate, 8.16 * 10^25 atoms of calcium are found in the solid. How many other

    asked on December 11, 2014
  2. Chemistry

    Methane reacts with oxygen to produce carbon dioxide, water and heat. If the percent yield of the reaction is 90.0%, how many grams of methane must be burned to produce 150.0 kJ of energy? ___ CH4 (g)+ ___ O2 (g) → ___ CO2 (g) + ___ H2O(g) + 802 kJ

    asked on December 11, 2014
  3. Chemistry

    7) 14 carat gold has a purity of 58.3%. How many moles of gold are in 163 grams of 14 carat gold? Answer in units of moles. 8) A 15.9 g sample of iron ore is treated as follows. The iron in the sample is all converted by a series of chemical reactions to

    asked on August 30, 2015
  4. math

    A company separates iron, lead, and kryptonite from ore by the floatation separation process, which has three steps: oiling, mixing, and separation. These steps must be applied for 3, 4, and 1 hour respectively to produce one unit of iron; 3, 3, and 1 hour

    asked on March 3, 2016
  5. Physics

    Given the masses of the sun and earth are 1.99x10^30 kg and 5.98x10^24 kg respectively. Calculate the gravitational force between them when their centers are 1.50x10^11m apart

    asked on September 23, 2016
  6. science !!!!

    does anybody know some quick facts about earth science (Broken Link Removed)

    asked on July 22, 2006
  7. Algebra

    Carmella has $1200 invested in two stocks. One returns 8% per year and the other returns 12% per year. The income from the 8% stock is $3 more than the income from the %12 stock. How much did carmello invest in each stock? B) wrtie an equation about the

    asked on January 30, 2009
  8. Maths

    At a boarding school, in the evening, 9 students always take walks in groups of 3. How can the groups be arranged so that each person walks in a group with every other person exactly once in 4 days? I would like to know whether there is a trick to these

    asked on February 20, 2015
  9. Microeconomics

    A major overhaul of the Federal Tax structure was enacted at the end of 2017, effective beginning with the 2018 tax year. This assignment consists of a calculation to gauge effects on your own situation or upon a mythical one, as well as some analysis of

    asked on April 16, 2018
  10. algebra

    A grid shows the positions of a subway stop and your house. The subway stop is located at (7, -6) and your house is located at (-9, 5). What is the distance, to the nearest unit, between your house and the subway stop?

    asked on March 12, 2015
  11. Science - Optics

    A lens has a magnification of +2.0 and if the focal length is +10 find the impage position and the object position. The type of lens is a diverging lens, but how do i find the di and the do if nothing else is given?

    asked on February 28, 2010
  12. music

    how do you change a theme (melody) in music to make variations?

    asked on September 20, 2008
  13. Chemistry

    The density of aluminum is 2.70g/cm(cubid) and the density of chromium is 7.19 g/cm(cubid). If equal Masses (1g) of aluminum and chromium are transferred to equal columes of water in separate graduated cylinders, which graduated cylinder would have the

    asked on January 19, 2009
  14. science

    List at least three physical properties of water which contain numerical values. Describe a chemical proterty of water which involves a chemical reaction.

    asked on January 22, 2009
  15. algebra 1

    expand: 1) (x-4)^2 2) (2x-1)^2

    asked on April 17, 2013
  16. Stats

    I just need help with starting how to calculate the problem I am so lost. A random sample of eight observations from the first population resulted in a standard deviation of 10. A random sample of six observations from the second population resulted in a

    asked on December 6, 2010
  17. Chemistry

    Given that the world's oceans comtain 1.35 x 10(to the 9th power)km³ of water, determine the mass in grams. Show how to obtain conversion factors from km³ to m³, report value in proper scientific notation using the correct number of significant figures.

    asked on January 22, 2009
  18. Genetics

    The genome of Elradicus hypotheticus consists of 3 x 105 bp of B-DNA. a. How many turns are present in the double-helix? b. What is the length of the DNA in μm?

    asked on March 22, 2015
  19. jordan

    a horizontal force of 12n is used to pu;; a 24kg block at constant veocity on a horizontal floor. what is the cofficient of friction ?

    asked on December 2, 2013
  20. algebra


    asked on September 10, 2012
  21. Analogies

    amendnent:constitution::________:letter An Amendment is an addition to a constitution. With word processors and e-mail, you may not have heard of an addition to a letter. A postscript (P.S.) is what we used to add to a handwritten or typed letter when we

    asked on October 30, 2006
  22. social

    if a distance of 60km is represented by 10cm on a map

    asked on February 3, 2016
  23. maths

    carl thought of 5 numbers and told danny all the sums that could be made by adding the numbers in pairs. the list of sums is given below. what are the five numbers 6,7,8,8,9,9,10,10,11,12 I thought of 34426 but the 11 does not work

    asked on October 30, 2014
  24. algebra 2

    find coordinates of vertices formed by x+yless than or equal to 2 x-2y less than or equal to 8 and x+(-1/3y) greater or equal to -2/3

    asked on October 29, 2012
  25. algebra


    asked on September 10, 2012
  26. efdtef

    what conclusion based on the effectof temp on seedling growth can be drawn from this chart

    asked on January 24, 2011
  27. history/science

    What was the average weight and height of of a person 100 years ago??

    asked on November 4, 2007
  28. ESL

    Which one is right: Do you need any sugar or Do you need a sugar?

    asked on August 31, 2007
  29. help i gott a test in 2 days !!!

    use the formula F= 9 x C+32 ___ 5 where f represents fahrenheit temperature and C is Celcius. Celius is -10 what is F,fahrenheit sry the dash and the 5 are supposed to be under the nine which will be nine/fifths ok you write down ALL the important info on

    asked on July 23, 2006
  30. algebra 2

    3x+2y=12 x-2y=4

    asked on November 6, 2012
  31. algebra 2


    asked on October 1, 2012
  32. Algebra 2

    I also need help with this two. 1.0.5=41x-2(1.3x-4) 2. 8.7=3.5m-2.5(5.4-6m)

    asked on September 8, 2012
  33. Algebra 2


    asked on September 8, 2012
  34. math

    y=1/2x-3 y=3/2x-1

    asked on January 12, 2011
  35. Math

    In a month a stereo store sold %17,500 worth of VCRs which, was 28% of its total sales. Find the total sale for the month. Explain. Thanks! (:

    asked on February 15, 2010
  36. AP Literature

    “Have you considered my servant Job, that there is none like him on the earth?” … and then things get really difficult for Job. In literature, proximity to God (or the gods) can be extremely dangerous to one’s health! Write a well organized, three

    asked on October 1, 2009
  37. Chemistry`

    1.35 x10^24 g to pounds and then to ounces

    asked on January 25, 2009
  38. help!!!! i forgot how to do this!!!

    A veterans group gave out 1000 small american flags at the 4th of july parade.They paid $355 for the flags.What was the cost of each flag? You need to divide $355 by 1000. Notice that the price for each flag is less than $1.00. If you'd like to post your

    asked on July 22, 2006
  1. World History

    Nobody: Ms. Sue: YoU dIdn'T rEaD yOuR tExT!!

    posted on April 3, 2019
  2. History

    It's C, SS

    posted on March 29, 2019
  3. history

    It's C

    posted on March 25, 2019
  4. History

    It's B

    posted on March 12, 2019
  5. history

    It is D, Bolshevik Revolution At least I didn't called you ignorant

    posted on March 5, 2019
  6. Intermediate Accounting

    Calculation of loss to be recorded on the early retirement of bond :- = (600000 * 102 % - 570000) - 10 % of (600000 * 102 % - 570000). = (612000 - 570000) - 10 % of (612000 - 570000). = 42000 - 10 % of 42000. = 42000 - 4200 = $ 37,800. Conclusion :- Loss

    posted on December 3, 2018
  7. Math

    Roy had 3 times as many strickers as Sam.After Sam had bought another 60 strickers he had twice as many strickers as Roy.How many strickers did Sam have at first?

    posted on October 20, 2017
  8. math, help

    5 pens and pencils cost $55.00 and 3 pens and 5 pencils cost $41.00. Find the cost for 4 pens and 3 pencils

    posted on February 6, 2017
  9. science

    Which best describes his error?

    posted on December 8, 2016
  10. math

    I think the answer is 12 because I did 12+12+12+12+12+12=72 or u could say 12×6=72 and everything that I put is 12 so that's my answer.

    posted on October 19, 2016
  11. physics


    posted on October 1, 2016
  12. Math

    i don't know how to use a percent ruler but thankyou

    posted on October 26, 2015
  13. Algebra

    Finding Equivalent Fraction

    posted on April 21, 2015
  14. math

    A 5 foot girl casts a 4 foot shadow, a nearby stop sign casts an 8 foot shadow. How tall is the stop sign?

    posted on February 5, 2015

    b. –19.6 J/K e. +41.5 J/K

    posted on March 24, 2013
  16. calculus

    d i v i d e

    posted on November 27, 2012
  17. algebra

    how is it w=-1/2 ?

    posted on September 10, 2012
  18. Chemistry

    and m³ to cm³

    posted on January 22, 2009
  19. Chemistry

    correction: equal Volumes of water**

    posted on January 19, 2009
  20. chemistry

    bhavika is your surname Nayee!!!! if it is.....I KNOW YOU!!!!!!! please reply

    posted on December 1, 2008
  21. math Third grade

    what is a polygon? Name 4 polygons you know and list the charactertistics for each one.

    posted on November 3, 2008
  22. math Third grade

    what is a polygon? name 4 polygons you know and list the charactertistics for each one.

    posted on November 3, 2008
  23. yr 8 - spanish

    school bag, pencil case, excercise book, textbook, pens, pencils, pencil sharpener, dictionary, rubber, ruler, planner, folder, i don't have, i have

    posted on September 20, 2008