What is the formula weight of MgSO4?
The formula weight of MgSO4 (magnesium sulfate) is calculated by adding the atomic weights of each element in the formula: Magnesium (Mg) has an atomic weight of 24.305, sulfur (S) has an atomic weight of 32.065, and oxygen (O) has an atomic weight of 15.999. Therefore, the formula weight of MgSO4 is 24.305 + 32.065 + (15.999 * 4) = 120.366 g/mol.