REALLY EASY MATH, NEED HELP |
| *salcha* |
 Dec 6 2005, 03:29 AM
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#1
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Okay, I lied. It's chem :E uhhh due December 7,
Doing mole problems. 1 mole of particles = 6.02 x 10^23 particles A mole of Milky Way candy bars placed end to end would reach across the Milky Way Galaxy how many times? Milk Way Galaxy = 100,000 light-years in diameter 1 light year = 5.88 × 10^12 miles So the Milky Way, in miles, would be 5.88 × 10^17 miles. Right? And a small Milky Way candy bar would be = 4.5 cm AHGNKJANB HELP. So what do I start with? EDIT; errrrrghhhhh actually, the teacher wanted me to use the big candy bar, so it's 10 cm. my bad. so this is what i have: 1 mole * 2.06x10^23 * 10 cm/10^5 * 1 light second * 1 light minute/60 light seconds * 1 light hr/60 light minutes * 1 light day/24 light hours * 1 light year/365.25 light days which amounts tooooo... 2.06x10^23/3.16x10^12 =6.52 x 10^10 ???????????? help. |
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| *wind&fire* |
Dec 6 2005, 03:37 AM
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#2
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light year = 3x10^8m/s
distance of a light year = 9.46x10^15m length of candy bar = 4.5cm = 0.045m how many candy bars across = 9.46x10^15m/0.045 = 2.1x10^17 |
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| *mzkandi* |
Dec 6 2005, 07:45 AM
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#3
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BUMP Further help is needed! |
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| *salcha* |
Dec 6 2005, 07:11 PM
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#4
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I updated it. Can someone check my work?
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Dec 6 2005, 07:18 PM
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#5
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 dripping destruction  Group: Staff Alumni Posts: 7,282 Joined: Jun 2004 Member No: 21,929 |
1* 10^6 light years * 3 * 10^8 meters/ light sec * 60 *60 * 24 * 365.24 * 10 = 10 cm milky way bar lengths to go across the milky way.
take a mol, divide by that number. |
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| *salcha* |
Dec 6 2005, 07:29 PM
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#6
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errr..isn't it 10^5 light years?
arghhh and i forgot, avagadro's number is 6.02, not 2.06 ): |
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| *mipadi* |
Dec 6 2005, 07:37 PM
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#7
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I have a really handy mole conversion program that I wrote when I took chemistry. It converts to a number of other units.
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| *salcha* |
Dec 6 2005, 07:47 PM
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#8
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):
now that, i would like. okay, so 1 mole * 6.02 x 10^23 * 10 cm now ihave to convert cm to light years. noooooooOoOO |
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| *wind&fire* |
Dec 6 2005, 07:55 PM
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#9
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3x10^8m/s = 1 light year
0.01m 0.01/3x10^8m= how many light years... i dont have a calculator here so do it yourself i hope thats right...eh |
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| *salcha* |
Dec 6 2005, 08:12 PM
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#10
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AHH NEVERMIND I FIGURED IT OUT.
=64. yay. close? thanks to everyone who helped 
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