A certain protein was found to contain 0.214% cobalt by mass. Determine the minimum molecular mass of the protein.

That's an interesting question to ask as minimum molecular mass is the important thing

As given inn the data the manganese present is equal to 0.818. That's mean hundred gram of protein will contain = 0.412 g of manganese  

and we know that molar mass of manganese is equal to 54.938 u

so  we will calculate that in 100 g we will have the 0.818/54.938 moles of manganese which will be equal to 0.0149 g moles of manganese.

and in totall 100 gram of protein  

1mole= 100/ 0.0149 = 6711 g/mol of protein minimum molecular mass

Explanation:

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.