What is the mass of 4.00 moles of iron(fe)?

223 g

Explanation:

Molar mass Fe = 55.845 g/mol

mass=molar mass* number of moles=55.845*4.00≈223 g

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.

that tool would be a compass