KevinD Posted March 16, 2009 Share Posted March 16, 2009 Hello all, I'm obviously new here. I've got a Physics problem that i need help on. Its really just a converion really. Am working on a mass spectrameter problem and i need to convert the AMU of U235 and U238 to kg in scientific notation (i.e. 0.00x10^-26 kg or something like that). What i have us u235 is 235.043923 and u238 is 238.050783. Thanks! Link to comment Share on other sites More sharing options...
swansont Posted March 16, 2009 Share Posted March 16, 2009 A mole of C-12 has the mass of exactly 12 grams, i.e. there is Avogadro's number of atomic mass units in 1 gram. Link to comment Share on other sites More sharing options...
KevinD Posted March 16, 2009 Author Share Posted March 16, 2009 that really doesnt help me much when i dont understand how that relates to this. Merged post follows: Consecutive posts mergedi also need to mentio that that isnt the answer to the problem but merely gets me started on the problem. Link to comment Share on other sites More sharing options...
swansont Posted March 17, 2009 Share Posted March 17, 2009 Hyrogen has a mass of 1.007825 amu, which is equivalent to [math]\frac{1.007825}{6.02*10^{23}}[/math] grams Does that help? Link to comment Share on other sites More sharing options...
KevinD Posted March 17, 2009 Author Share Posted March 17, 2009 well, i actually went to the professor over the physics department and found the proper numbers. 1u = 1.67x10^-27 kg. so in order to find Uranium 235's mass in kg its 1.67x10^-27 x 235.043923 = the mass of U235 in kg. That's what i was looking for. I just didn know the 1u number which is where the research came in. this all comes from the head physicist and a chart of strange and nebulous numbers. Link to comment Share on other sites More sharing options...
swansont Posted March 17, 2009 Share Posted March 17, 2009 well, i actually went to the professor over the physics department and found the proper numbers. 1u = 1.67x10^-27 kg. so in order to find Uranium 235's mass in kg its 1.67x10^-27 x 235.043923 = the mass of U235 in kg. That's what i was looking for. I just didn know the 1u number which is where the research came in. this all comes from the head physicist and a chart of strange and nebulous numbers. And what do you get when you take the reciprocal of 1.67x10^-27 kg? (it really should be 1.66, though) Link to comment Share on other sites More sharing options...
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