Collection of Gas Over Water
193 mL of O
was collected over water on a day when the atmospheric pressure was 762 mmHg. The temperature of the water was 23.0
C. How many grams of oxygen were collected?
Use Dalton's law and the vapor pressure of water at 23.0
C to correct the pressure to units of atmoshperes.
Convert the corrected pressure to atmospheres.
Use the ideal gas law to find out how many moles of gas were produced:
PV = nRT
Use the number of moles and the molecular weight of oxygen to find out how many grams of oxygen were collected.
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