Question

A certain protein was found to contain 0.870% Cobalt by mass. Determine the minimum molecular mass of the protein (in amu)

Answer 1

@Callisto @shadowfiend @AccessDenied @ganeshie8

Answer 2

0.0087 x 58.93 g/mol = 0.5126 g/mol

idk this is the only thing i can think of

Answer 3

Well, obviously it's got to contain at least one cobalt atom, right? And one cobalt atom weighs 58.9332 g/mol. So if that represents 0.870% of the total mass of the protein, the latter would be 58.9332/0.00870 = 6.774 x 10^3 g/mol.

Answer 4

Bah, sorry. I typed one more digit than is significant: 6.77 x 10^3 g/mol, or 6.77 kDa.

Answer 5

one mole of cobalt atoms weighs 58.93 not one atom.