A sample of O2 is collected over water at 21 C.If the total pressure of the sample is 712 torr, what is the partial pressure of the O2? The vapor pressure of water at 21 C is 18.6 torr.
A) 712 torr
B) 731 torr
C) 693 torr
D) 38.3 torr
E) not enough information
Correct Answer:
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