Anewly discovered metalloprotein, which contains four atoms of fe per molecule of protein, is found to be 0.600% fe by mass. calculate the molar mass of the metalloprotein.

Let the basis for the calculation of the molar mass of the mellaprotein be 1 mole. If x is the mass of 1 mole of the substance then, 

Each of the mole of iron has a mass of 55.845 g/mol.

         (4 mols of Fe)(55.845 g/ mol) = 223.38 grams

This mass is 0.60% of the total mass of the mellaprotein.

             x = (223.38 grams) / (0.60/100) = 37230 g

37230 grams

29.1-12=17.1the answer is this one

60.0 - there are 3 significant numbers