A 100 ML Sample of Oxygen Gas Is Collected Over

question 61

Multiple Choice

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

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