A 100 mL sample of oxygen gas is collected over water at 26 ° C and at a pressure of 756 torr. Given that the vapor pressure of water at 26 ° C is 25 torr, how many moles of dry oxygen are present?
A) 4.0 mol
B) 3.9×10 - 3 mol
C) 6.8×10 - 4 mol
D) 2.1×10 - 3 mol
E) none of these
Correct Answer:
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