Question

calculate the mass of. (a) 2moles of iron(Ar,fe=56) (b) 0.25 moles of iron(Ar,fe=56) use the forrmula mass/Ar​

Answer 1

Explanation:

let n = no. of moles

m = mass

mm = molecular mass

a) n = m/mm; 2=m/56; m= 122

b) m= 0.25*56; m= 14