the atomic mass of al is 26.98154g/mol. is it possible to have 5.0*10^-25 g of al? Explain

Question

aaronq · Answer

divide the mass you have by molar mass of that element.

this gives you how many moles you have. 

multiply the number of moles by avogadro's number (6.023x10^23) which signifies the amount of atoms (or molecules) present in one mole, if that number is a fraction, it means that the mass you have does not equal to one single atom and thus not possible. (ps there is no balance in the world that could detect that, so it's a pretty fictitious question).

ps
a mole is a proportion like saying "a dozen"

a dozen atoms = 12 atoms
a mole of atoms = 6.023x10^23 atoms

hope this helps.

anonymous · Answer

Thank you so much!!! This explained everything to me!!

aaronq · Answer

no prob! i figured it was better than just giving you the answer