Respuesta :
Answer:
3.4125 mole O₂
Explanation:
Data Given:
Mole of Cr = 4.55 mole
Mole of O₂ = to be calculated
4Cr + 3O₂------------> 2Cr₂O₃
from the above reaction data obtained:
4Cr + 3O₂ ------------> 2Cr₂O₃
4mole 3mole 2moles
The above reaction show that
4 mole of the Cr combine with 3 mole of O₂ and produce 2 moles of Cr₂O₃
in other words
4 mole of the Cr ≅ 3 mole of O₂
apply the unity formula
4 mole of the Cr ≅ 3 mole of O₂
4.55 mole of the Cr ≅ X mole of O₂
so by cross multiplication
4 mole of Cr x X mole of O₂ ≅ 3 mole of O₂ x 4.55 mole of the Cr
we have to find moles of O₂ ....so by rearrangement of the above equation
X mole of O₂ = 3 mole x 4.55 mole
4 mole
X mole of O₂ = 3.4125 mole
So
4.55 mole of Cr will react with 3.4125 mole O₂
