How many iron atoms are in 0.850 moles of iron

atoms

Explanation:

Use dimensional analysis to convert to moles by putting the moles of Fe (iron) on top and multiply by Avogadro's constant to cancel out moles and be left with atoms.

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).