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

Answer:

a) mass of 2 moles of iron

= number of moles × molar mass

= 2 × 56

= 112 g

b) mass of 0.25 mole of iron

= number of moles × molar mass

= 0.25 × 56

= 14 g