In a sample of FeBr2 that weighs 5832 grams what is the weight of bromine?

Answer 1

Atomic mass Fe = 55.85 g / mole

Atomic mass of Br = 79.90 g / mole

Molar mass FeBr₂ = 55.85 g + (2 x 79.90 g) = 55.85 g + 159.8 g = 215.65 g / mole

Find the MOLES of FeBr₂:

moles FeBr₂ = 5832 g x 1 mole FeBr₂ / 215.65 g = 27.04 moles FeBr₂

Find moles of Br₂:

moles Br₂ = 27.04 moles FeBr₂ x 2 moles Br / 1 mole FeBr₂ = 54.08 moles Br

Find mass of Br:

54.08 moles Br x 79.90 g / mole = 4321 g Br