How many moles of Fe are in 235.45g of Fe

We are given with an element Iron, Fe, with a mass of 235.45 g. We are tasked to solve for its corresponding molar mass in mol. We need to find first the molecular weight of Iron, that is

Fe = 55.845 g/mol

With 235.45 g sample, its corresponding mol is

mol Fe = 235.45 g x 1 mol/55.845 = 4.22 mol Fe

Therefore, molar mass of Iron is 4.22 mol