What mass of aluminum is produced by the decomposition of 5.0 kg Al2O3? How many moles of oxygen are produced?

2646.13g of Al or 2.65kg of Al

Explanation:

Equation of reaction

2Al₂O₃ → 4Al + 3O₂

From equation of reaction,

2 moles of Al₂O₃ will produce 4 moles of Al

Number of moles = mass / molar mass

Mass = number of moles * molarmass

Molar mass of Al₂O₃ = 101.96g/mol

Mass = 2 * 101.96 = 203.92g

Mass of Al = number of moles (4) * molar mass of Al

Mass = 4 * 26.98

Mass = 107.92g

203.92g of Al₂O₃ = 107.92g of Al

5000g of Al₂O₃ = x g of Al

X = (5000 * 107.92) / 203.92

X = 2646.13g of Al

X = 2.65Kg of Al