Question

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

Answer 1

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