Verified answer

5.50 E14 atoms * 56g/mole * 1mole/6.02 E23= 51.2 E(14-23) g=

51.2 E-9 g = 5.12 E-8 g

= 5.12 * 10^-8 g

(so small because such a small fraction fo a mole)

Not very much.

6.02 * 10^23 molecules of iron has a mass of 56 grams.

5.50 * 10^14 molecules of iron has a mass of x

Cross multiply

5.5*10^14 * 56 = 6.02*10^23 x

x = 3.08*10^16/6.02*10^23

x = 5.12 * 10^-8 grams.