What is the mass of 5.35 mol Fe2 (SO4) 3?

By the formula, Mass/molecular mass = mol

If you know the number of moles and the molecular mass of Fe2 (SO4) 3, it gives you this:

(56x2 + (32+4x16) x3)

= 112 + 96x3

=272

then to obtain the mass

molecular mass * mol = mass

therefore,

272 * 5.35 = 759.2