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Continue Learning about Chemistry
What is the freezing point of zinc?
The freezing point of zinc is 419.53°C (787.15°F).
A 250.0mL sample of oxygen gas was collected over water at a temperature of 25C and 750.0 nm Hg How many moles of oxygen gas were there in this sample if the vapor pressure of water at 25C is 23.8 mm?
To find the moles of oxygen gas collected, we first need to correct for the presence of water vapor. Calculate the partial pressure of oxygen by subtracting the vapor pressure of water (23.8 mmHg) from the total pressure of the gas collected (750.0 mmHg). Convert the corrected pressure of oxygen to atm. Use the ideal gas law, PV = nRT, with the volume of the sample (250.0 mL), temperature (25°C = 298 K), and the corrected pressure of oxygen to solve for moles of oxygen gas.
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