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If you were asked to convert 4.2 x 1022 atoms of aluminum to moles, which of the following should you use for the conversion? (2 points) fraction six point zero two two times ten to twenty third power atoms Al over thirteen mol Al fraction one mol Al over twenty six point nine eight one atoms Al fraction one mol Al over thirteen point zero atoms Al fraction one mol Al over six point zero two two times ten to twenty third power atoms Al

Respuesta :

If you  are ask to convert  4.2 x10^22   atoms of   aluminium  to moles  the following should be used for  conversation

fraction of 1 mole Al  over six point  zero two two  times ten  to   twenty  third power  atom Al

that is 1  mole  =  6.022 x10^23  atom
            ?         =    4.2 x10^22  atom

by  cross multiplication

(1mole   x 4.2 x10^22)/  6.022 x10^23  =  0.0697  moles