Let's start by assuming that the bread is limiting.

[SOUND] So if the bread is limiting the agent,

that means we're assuming that the turkey is the accessory agent.

Now I know that I have 6 slices of bread.

That was the amount that was given in the problem.

And I also know the relationship between the number of pieces of bread and

the number of sandwiches I can make, and

I get that from the coefficients in my balanced equation.

So, I know that for every two slices of bread, [SOUND] I can have one sandwich.

Now this is the same way we looked at in the previous unit,

where we looked at the relationship,

the mole-to-mole ratio between two substances in a chemical equation.

The difference is now that we're not going to be able to do just one calculation to

find the amount of product, we're going to have to do two calculations.

So here, if we assume that the bread is limiting, we know that six slices of

bread, our slices of bread cancel out with one another, and

what we're left with, is that we can form three sandwiches [SOUND].

So now, I assume bread is limiting.

Now I want to assume [SOUND] that the turkey is the limiting reagent and

therefore that the bread is the excess reagent.

So I do the same thing I did with the bread.

I have five [SOUND] pieces of turkey.

Again, I go to my balanced chemical equation or my balanced equation here.

To determine the ratio between turkey and sandwiches, and

see that I need 1 piece of turkey [SOUND] for every 1 sandwich.

Again, I see that turkey cancels with turkey.

When I do the math, I see that I get 5 sandwiches.