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About rthmjohn

  • Birthday 12/22/1988

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  • Location
    Bloomington, Indiana
  • Interests
    pianoforte, drums, experiments (chemistry)
  • Favorite Area of Science
  • Biography
    love classical music (especially chopin), play jazz/rock drumset, play classical piano, love studying chemistry and conducting experiments
  • Occupation


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  1. I was having trouble finding a concise answer as to what types of iron compounds are found in the various foods that contain them. For instance, what is the form of iron found in leafy green vegetables vs. the kind found in red meat. Thanks in advance, John
  2. Does the principle of escape velocity apply to light? I'm a physics dummy, so I apologize if this sounds like a dumb question.
  3. So even though the probability of flipping heads 100 times consecutively is 1/2^100, you shouldn't necessarily EXPECT to flip tails after flipping 99 consecutive heads?
  4. For example, the probability of flipping heads with a two-faced coin is 1/2. Does the probability of flipping heads increase after flipping consecutive tails and vice versa?
  5. They say the chances of dying in a plane crash are 1 in 9 million. Am I correct in thinking that these chances increase the more you fly in airplanes? If that is true then how do you calculate your chances of dying in a plane crash after every new flight you board? That is, what is the formula for calculating this? Thanks, John
  6. I'm disappointed. I still don't see a nutrition or food science forum! I've got lots of questions regarding this topic and would like to be able to procure answers. Nutrition and food science are a part of science and should be included in SFN... but that's just my opinion (sigh...)
  7. Well mr. pangloss... what do you think should be done? Do you even think global warming is a problem?
  8. Global warming is obviously very real, but as long as these mega-corporations like Exxon Mobil and BP exist in the world, they will fight to prove global warming is a hoax. Enacting stricter regulations on emissions costs companies lots of money, and when you threaten to take awaysthese rich bastards' money you are guaranteed to see opposition from them. By the way... I know global warming is supposed to cause temperature rise, but I live in Indiana and it's supposed to be spring. It was in the 80's last week but over the weekend, temperatures dropped below the 20's (in degrees Fahrenheit of course). What's the deal with that?
  9. Hey guys, is there a Food Science/Nutrition forum? If not, I really think there should be considering the world's obesity epidemic!
  10. Allow me to rephrase my query; I was in an awful hurry when i first posted this thread and didn't bother to look at what I wrote. I know that sodium HYDROXIDE isn't and acid--hopefully I didn't sound too studpid there. What I meant to ask was why alcohols don't react with strong BASES and if this applies to all weak acids.
  11. I read in my text book that alcohols like methanol don't react with strong acids like sodium hyroxide. They will react, however, with organic acids. Why is this? Does this apply to all weak acids and strong bases?
  12. I am familiar with the ICE table. However, i did misword the problem (i didn't have a copy of the worksheet on hand when i started this thread). I have the worksheet now, along with all of the notes my teacher gave to solve this problem. Here is the actual problem my teacher gave us, WORD FOR WORD: Calculate the MOLAR SOLUBILITY of silver thiocyanate, AgSCN, in pure water and in 0.01M NaSCN. My teacher forgot to include the Ksp in the problem, but otherwise, I left NOTHING out in the above problem. She later wrote the Ksp for AgOH on the board as 2E-8. She then proceeded in trying to help us with the problem. She wrote the following reaction: AgSCN + H2O <==> AgOH + HSCN (does this really happen and is it necesary to solve this problem?) Then she wrote: 2E-8 = [Ag+][OH-] She substituted x's for the silver and thiocyanate ion concentrations and then solved for x as 1.41E-4. Then, for the second problem, she wrote: AgSCN <==> Ag+ + SCN- I didn't even understand what she did for the second half of the problem, but the funny thing is (and I just realized this) the problem asked for the MOLAR SOLUBILITY and she only solved for Ksp values of god knows what. Was any of the work she did necessary? Who knows, maybe she's right and i'm just plain crazy, but could anyone help me solve this problem now that I've got it worded right?
  13. Funny, because our teacher told us EXPLICITLY that because of the initial presence of SCN- would force us to do the following (and this is what our teacher wrote on the board): AgSCN: initial = 0, change = +x, equilibrium = x Ag+: i = 0, c = -x, e = -x SCN-: i = .01, c = -x, e = .01 - x
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