Question

Ayuda por favor.!
Quiero encontrar el valor en gramos del hierro

Answer 1

             2Al + Fe2O3 → 2Fe + Al2O3

Mm Fe2O3 = 160 g/mol
             Fe =  56 g/mol
              Al = 27 g/mol

1. calculr moles a partir de los gramos dados

n Al= 15 g / 27 g/mol = 0.56 moles Al
nFe2O3 = 30 g / 160 g/mol = 0.18 moles Fe2O3

2. Calcular moles de Fe a partir de los moles calculados

n Fe = 0.56 moles Al  x  2 mol Fe
                                      ``````````````
                                       2 mol Al
n Fe = 0.56 moles de Al

n Fe = 0.18 moles Fe2O3 x 2 moles Fe
                                            ````````````````
                                            1 mol Fe2O3

n Fe = 0.36 moles de Fe

Reactivo limitante: Fe2O3 (produce 0.36 moles de Fe)

3. calcular gramos de Fe

g Fe = 0.36 moles de Fe  x  56 g Fe
                                            `````````````
                                             1 mol Fe

g Fe = 20.16 g