00:01
Hi, so to solve for this, the first question is what is the limiting reactant? so we will solve for mole ratio.
00:08
Mole ratio is the number of moles of the reactant divided by the coefficient of that reactant from the balance equation.
00:15
So for aluminum, we have 4 .20 moles.
00:19
What's the coefficient of aluminum from the balance equation? we have 2.
00:22
So this will give us 2 .1.
00:24
And for fe2o3, coefficient of fe2o3 is 1.
00:31
So this will be 1 .75 over 1.
00:33
This will give us 1 .75.
00:35
And whichever gives the smallest mole ratio will be the limiting reactant.
00:38
That means fe2o3 is our limiting reactant since 1 .75 is less than 2 .1.
00:45
So the answer to the first question is fe2o3...