1. The problem statement, all variables and given/known data "Use your experimental data to calculate the formula for hydrated MgSO4" 2. Relevant equations i used 2.25g x 1 mole/141.46 = 0.016 moles 3. The attempt at a solution i'm not sure how to calculate the formula. how do i do that? is there a different equation involved? please reply, i really need help.