kaylala
  • kaylala
How many grams is 1 a.m.u. ? (please provide or show a Detailed SOLutioN) Thanks!
Chemistry
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SOLVED
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schrodinger
  • schrodinger
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thomaster
  • thomaster
An atomic mass unit is equal to 1.66053892 × 10^-27 kilograms
anonymous
  • anonymous
http://answers.yahoo.com/question/index?qid=20090107072739AA1Pe1D hope it helps ...
kaylala
  • kaylala
@thomaster so, how do you compute for the grams?

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thomaster
  • thomaster
What do you mean? what 1 amu is in gram? That's \(\large\sf 1.66053892 × 10^{-24}\) gram
kaylala
  • kaylala
@thomaster what is 1 amu in gram? --- this is what i meant now, how did you get 1.66 x 10^-24 gram? i need the solution too. if you may
thomaster
  • thomaster
It is just a constant, you can't calculate it. A long time ago they decided to take the mass of carbon-12 and divide that by 12 to get 1 amu.
kaylala
  • kaylala
@thomaster but how come my book has a derivation / solution of how to know how much is 1g in amu? see the attached picture below:
kaylala
  • kaylala
HERE IS THE SOL'n
1 Attachment
thomaster
  • thomaster
that's the relationship between the amu mass and avogadro's number Avogadro's number is the amount of particles in 1 mole of a compound. Like it says in your book, 1 gram is avogadro's number in amu You could solve this with a crosstable |dw:1372679331655:dw|
kaylala
  • kaylala
ok. i got it thanks @thomaster
thomaster
  • thomaster
No problem :)
kaylala
  • kaylala
@thomaster wait a minute. i'm mixed up how's you get 1.66x10^-24? when we're supposed to find how many grams is in 1 amu?
kaylala
  • kaylala
@thomaster if the answer is 1.66x10^-24; then how did you get 1.66x10^-24 as your solution variable?
thomaster
  • thomaster
1 divided by avogadro's number = 1.66*10^-24
thomaster
  • thomaster
because 6.022*10^23 amu = 1 gram
kaylala
  • kaylala
@thomaster where did 1 come from?
kaylala
  • kaylala
what's the precise formula?
kaylala
  • kaylala
what's the precise formula? and the summary of all? @thomaster
thomaster
  • thomaster
It's explained here: |dw:1372682633203:dw|
thomaster
  • thomaster
since 1*1 = 1 that's where the 1 comes from
kaylala
  • kaylala
ok thanks again for clarifying :))))))

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