The Synthesis of a Certain Drug Requires 4 Steps

question 58

Multiple Choice

The synthesis of a certain drug requires 4 steps. First three steps were relatively easy with percent yields of 97.1%, 94.3% and 92.8% respectively. However, the last step was very difficult with a percent yield of 72.7%. What was the overall percent yield?

• A) 27. 9%
• B) 61.8%
• C) 72.7%
• D) 85.0%

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