A chemist collects a sample of oxygen gas in the laboratory by water displacement on a day when the atmospheric pressure in the laboratory is 765 mm Hg. If the equilibrium vapor pressure of the water vapor in the collection vessel is 18 mm Hg, what is the partial pressure of the oxygen in the collection vessel? a. 747 mm Hg b. 765 mm Hg c. 783 mm Hg d. 18 mm Hg

Which of the following will have the highest boiling point?      A. Hg(l) B. PCl3 C. S02 D.SO3

Please help me with questions 29 & 30. Thank you in advance

At a pressure of 1 atm, the temperature 83.9 K is called the _______ of Ar .The normal boiling point for Ar is at ____ KThe triple point pressure for Ar is ______  atmThe critical pressure for Ar is 48.0 atm. At temperatures above 150.6 K and pressures above 48.0 atm, Ar is a _______. Ar is a _______ at 0.680 atm and 93.4 K.Ar is a ________ at 1.00 atm and 84.2 K.Ar is a ______ at 29.0 atm and 77.8 K.

Which of the following molecules has the higher AHvap (the amount of energy needed to change the substance from a liquid to a gas) and why? A They both have the same Hvap, because they have the same type of intermolecular force. AHvap is temperature dependent, so it depends on the temperature. A, because it has stronger intermolecular forces, requiring more energy to overcome the intermolecular forces. B, because it has stronger intermolecular forces, requiring more energy to overcome the intermolecular forces. Not enough information is given.

The approximate molar mass of a volatile liquid can be determined by:1. Heating a sample of the liquid in a flask with a tiny hole at the top, which converts the liquid into gas that may escape through the hole2. Removing the flask from heat at the instant when the last bit of liquid becomes gas, at which time the flask will be filled with only gaseous sample at ambient pressure3. Sealing the flask and permitting the gaseous sample to condense to liquid, and then weighing the flask to determine the sample’s mass as shown.