Question

Question #80545

Answer 1

The atomic mass of cobalt `=59 " g/mol"`

It is given that Cyanocobalamin (vitamin B12) is commonly found in vitamin supplements. It contains 4.34% cobalt by mass and there is one atom of cobalt in every molecule of cyanocobalamin

So the mass of Cyanocobalamin which contains 1 g atom or 59 g Cobalt represents its molar mas.

So molar mass of Cyanocobalamin

`=100/4.34xx59" g/mol"`

`~~1359.44" g/mol"`