Answer to Question #288799 in General Chemistry for gray

Question

You were given ferrous sulfate by your doctor to help prevent iron deficiency anemia. The chemical formula of ferrous sulfate is FeSO4. How many moles are there in 115.45 g? (atomic mass: Fe = 55.85 AMU; S= 32.01 AMU; O=16.00 AMU)

Answer 1

Molar mass of $FeSO_4=55.85+32.01+4(16)=151.86$

Moles = $\frac{115.45}{151.56}=0.76moles$