20 points to the person who can answer all 3 of these questions

Which compound contain an iron with a 3+ charge

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?

How many moles of oxygen react with 12 moles of aluminum