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%


B

Environmental & Atmospheric Sciences

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Fill in the blank(s) with correct word

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