Answer:
Number moles of oxygen = 0.125
Explanation:
Given:
Grams of aluminum = 4.52
Find:
Number moles of oxygen
Computation:
2 Al + 3/2 O2 ⇒ Al2O3
Mole of Al = 4.52 / 27
∵ 2 mole of Al = 3/2 mole of O2
1 mole of Al = (3/2)x(1/2) = 3/4 mole of O2
Number moles of oxygen = (3/4)(4.52/27)
Number moles of oxygen = 0.125
