Question

A certain protein was found to contain 0.292% manganese by mass. Determine the minimum molecular mass of the protein.

Answer 1

$55u \ \ \ \ \ \ \Rightarrow \ \ \ \ \ 0,292\%\\ x \ \ \ \ \ \ \ \ \ \Rightarrow \ \ \ \ \ 100\%\\\\ x = \frac{55u*100\%}{0,292\%}\approx18835,62u$