Which separation method can be used for separating large Marshmallows from hot chocolate powder?

Iwill give extra points to who gets this right

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?

Is a chemical message sent by another individual.