Question

If you have 3.45 × 1015 atoms of iron, how many moles of iron do you have?

A. 3.45 × 1015 moles

B. 5.73 × 10–9 moles

C. 2.08 × 1024 moles

D. 9.47 × 1038 moles

E. 6.02 × 10–23 moles

Answer 1

Just divide by avogadro's number this time
\(\sf\large\dfrac{ 3.45*10^{15}}{6.022*10^{23}}\)

Answer 2

Use this diagram, it has every conversion in it.

Answer 3

thanks!