how many moles of anhydrous MgSO4 are in 2.04grams of MgSO4

Answer 1

moles= massingrams/molmassMgSO4

Answer 2

mass: 2.04

molar mass of MgSO4: 24.3+32.1+16*4=120.4

moles= 2.04/120.4
= 0.0169mol