Answer:
0.16 moles Fe
Explanation:
To convert the mass to moles, you need to multiply the given value by the molar mass of iron. The molar mass is a ratio that compares the mass of iron per every 1 mole. The ratio should be arranged in a way that allows for the cancellation of units (grams in the denominator).
Molar Mass (Fe): 55.845 g/mol
9.0 grams Fe 1 mole
---------------------- x ------------------------ = 0.16 moles Fe
55.845 grams
