In an experiment as described in the Principles section, 158 mL of O2 is collected over water. The mass of the O2 is measured to be 0.207 g, the temperature is 290 K and the barometric pressure that day is 754 mm Hg. Calculate the value of R in the units L, atm, K, mol. Remember: The pressure measured is the pressure of a mixture of water vapor and the gas we are interested in, O2. To correctly calculate the partial pressure of O2, the vapor pressure of the water must be accounted for. There is a table of vapor pressures of H2O at different temperatures in your lab manual.
In an experiment as described in the Principles section, 158 mL of O2 is collected over water. The mass of the O2 is measured to be 0.207 g, the temperature is 290 K and the barometric pressure that day is 754 mm Hg. Calculate the value of R in the units L, atm, K, mol. Remember: The pressure measured is the pressure of a mixture of water vapor and the gas we are interested in, O2. To correctly calculate the partial pressure of O2, the vapor pressure of the water must be accounted for. There is a table of vapor pressures of H2O at different temperatures in your lab manual.
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