Question

In: Chemistry

The concept of determining which reactant is limiting and which is in excess is akin to...

The concept of determining which reactant is limiting and which is in excess is akin to determining the number of sandwiches that can be made from a set number of ingredients. Assuming that a cheese sandwich consists of 2 slices of bread and 3 slices of cheese, determine the number of whole cheese sandwiches that can be prepared from 28 slices of bread and 39 slices of cheese.

Solutions

Expert Solution

ans)

2 slices of bread + 3 slices of cheese   -------------------> 1 cheese sandwich

            2                          3                                                           1

28 39                                                          ??

here

2 slices of bread need ----------------> 3 slices of cheese

28 slices of bread need ------------->        ??

slices of cheese = 28x 3 / 2 = 42

so we need 42 slices of cheese . but we have only 39 slices of cheese.

so here limiting reagent is slices of cheese

3 slices of cheese   -------------------> 1 cheese sandwich

           3                                                           1

39                                                          ??

cheese sandwich = 39 x 1 / 3 = 13

number of whole cheese sandwiches = 13


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