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Reply 20
Direwolf
No i doubt it, this is a June only exam.

and someone said before, that Uranium one with 0.5kg, what did you have to do, i had no idea.

I'm not sure if it's right but I worked out how many moles of 0.5kg of uranium-235 is. So:

1 mole = 235g of uranium-235

therefore:

500g of uranium-235 = (1/235) x 500 = 2.13 moles.

From there multiply the number of moles by avogadro's constant to get the number of atoms in 500g of uranium-235. Multiply this by your difference in mass.
Reply 21
that realy was a bitch of a question i thought maybe u converted it into moles but i dno how u use avagadros constant thats a job for the chemists

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