A sample of carbon monoxide gas was collected in a 2.0 L flask by displacing water at 28°C and 810 mmHg. Calculate the number of CO molecules in the flask. The vapor pressure of water at 28°C is 28.3 mmHg. A)5.0 * 10²² B)5.2 * 10²² C)3.8 * 10²³ D)5.4 * 10²³ E)3.8 * 10²⁵

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Quizplus · Accepted Answer

The partial pressure of CO is 810 mmHg - 28.3 mmHg = 781.7 mmHg. The number of CO molecules is:(781.7 mmHg / 760 mmHg/atm) * (2.0 L) * (1 mol / 22.4 L) * (6.022 * 10^23 molecules/mol) = 5.0 * 10^22 molecules

A Sample of Carbon Monoxide Gas Was Collected in a 2.0