In: Chemistry
How many mol Al2O3 made if:
4 Al (s) + 3 O2 (g) -> 2 Al2O3 (s) ; 16 mol Al , 13 mol O2
* Al is limited reagent
4 Al (s) + 3 O2 (g) --------------------> 2 Al2O3 (s)
4 3 2
16 13 ?
4 mol Al -------------> 3 mol O2
x mol Al --------------> 13 mol O2
x = 4 x 13 / 3 = 17.33 mol Al needed but we have only 16 mol Al . so limiting reagent is Al .
the product based on now limiting reagent
4 mol Al -------------------------> 2 mol Al2O3
16 mol Al ---------------> y mol Al2O3
y = 16 x 2 / 4 = 8 mol Al2O3
moles of Al2O3 made = 8