Question

If you where asked to convert 4.2*10^22 atoms of aluminum to moles, which of the following should you use for the conversion

Answer 1

0.0697 moles

Step-by-step explanation:

We are being asked 4.2 x 10^22 atoms of aluminium to moles the following should be used for conversion.

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 x 10^22 atom

by cross multiplication

(1 mole x 4.2 x 10^22)/ 6.022 x 10^23 = 0.0697 moles