The theoretical yield of chalk is 472,973 g
The percentage efficiency is the ratio of the actual to the theoretical yield multiplied by 100
From the question, we can see that each box of chalk contains 175 grams of chalk and we have about 2000 of such boxes.
The efficiency have been rated at 74%.
Actual yield of the chalk = 2000 * 175 = 350,000 grams
efficiency = actual yield/theoretical yield * 100/1
theoretical yield = actual yield * 100/efficiency
theoretical yield = 350,000 * 100/74
theoretical yield = 472,973 g
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