44 Visitor Messages

  1. ouch. you can't get like a grant or anything? like, I'm gonna be able to get the Pelle grant.
  2. I'm trying to figure out what's up with the sound on my computer. Ever since I downloaded media player 11, the sound hasn't worked.
    so, did you get to graduate?
  3. Hey Rook!!! ^ ^ What's up, Man? How are you? ^ ^ (free space)
  4. .... well ....like your lonely... and things like this..
  5. I'm not sure either... Anyway, How are you? Anything interesting going on? You seem to have a lot down messages on Myspace.
  6. Okay... Out of curiousity, how did you get my myspace? I don't think i've talked to you... oO
  7. hiya rook..i havent talked to u in awhile how are u..
  8. I am a girl lol well theats fine most people mistake that i am a boy cuz of my screenname~!
  9. Grumble Grumble Grumble

    Now keep in mind the context of your 'cookie' recipe... 7 moles of Oxygen is correct for K2Cr07, (with a ratio of 1 to 7 for Cr, and 2 to 7 for K) but these elements can also occur in different compounds, and different combinations... As an example, Potassium Nitrate (KNO3) used in making primitive 'gun powder' has a Potassium to Oxygen ratio of only 1 to 3... And since elements have different weights, the ratio (in grams) will be completely different...
  10. Grumble Grumble Grumble

    And to think that it been about 31 years since I've had to go over this stuff too...

    Okay, let me explain the answers in detail...

    1. The forumula states that for every 2xMg you put in, you get 2XMg0 out. The Ratio between input (as far as Mg is concerned...) and output is 1 to 1. (Therefore, if you put 4 moles of Mg in, how many do you get out...)

    2. The formula you're given is K2CrO7. This means that every mole of this molecule contains 2 moles of K, 1 mole of Cr and 7 moles of O. Since you're concerned about the weight of O, and you have 2 moles of K2CrO7, this means you have 2X(K2Cr07) or to be specific (since you're only concerned about the Oxygen) 2X(O7) = 14 moles of Oxygen in 2 moles of K2Cr07. what is the weight of 14 moles of Oxygen?

    3. The question is similar to the previous question. 1 mole of Sucrose (table sugar, not to be confused with a simple sugar) is C12H22O11. That means each mole of Sucrose (think of this as a cookie recipe...) contains 12 moles of Carbon. If one mole of Table Sugar contains 12 moles of Carbon, then how much Carbon is in two moles of Table Sugar. Answer is 2X12
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About Rook

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About Rook
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Love lifeguarding!
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TX
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Anime/Lifeguarding
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Yay-yea?

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Wanting to become a Psychiatrist... Oct 29, 2009 10:17 AM
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2 hours, 32 minutes, 55 seconds
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Mini Golf 3 (Sep 22, 2008 08:46 PM)
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