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Rslord202
Use Avogadro's number to figure out the particle count. The molar mass of iron is roughly 55.85 g/mol. Thus, 0.215 moles would be equivalent to 12 grams of iron. Avogadro's number of particles, approximately 6.022 x 10^23, is included in one mole. So 12 grams of iron contain about 1.3 x 10^23 particles.

Answer:

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Explanation:

From periodic table

One mole of Fe = 55.845 g

each mole = 6.022 x 10^23 particles  ....yah?

   12 gms *  1 mole / 55.845 gm * 6.022 x 10 ^23 particles/mole =

            12 /55.845  * 6.022 x10^23 = 1.29 x 10^23 particles of Fe