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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Which of the possible future effects of climate change is most likely to occur according to current predictions from the IPCC?
A. economic collapse of industrialized nations B. decrease of sea ice C. decrease of water resources in Los Angeles D. increase in hurricane intensity
Environmental & Atmospheric Sciences
Which of the following is the least biodegradable?
A) Paper bag from a grocery store B) Leaves and branches piled up on a hillside C) Glass beer bottle D) Polyethylene wrapper that was used to package Campbell's soup
Environmental & Atmospheric Sciences
The _____ winds converge at the Intertropical Convergence Zone
Fill in the blank(s) with correct word
Environmental & Atmospheric Sciences
What kind of stress is responsible for creating fault-block mountains?
A) Compression B) Tension C) Shear
Environmental & Atmospheric Sciences