Question

What is the mass in grams of 0.3 moles iron?

Answer 1

Moles is related to mass as follow,

Moles = Mass / M.mass ---- (1)
Where,
Moles = 0.3 mol

Mass = ?

M.mass = 55.84 g/mol

Solving eq.1 for Mass,

Mass = Moles × M.mass

Putting values,

Mass = 0.3 mol × 55.84 g.mol⁻¹

Mass = 16.75 g