1. Consider the following two substances and their vapor pressures at 298 K. Substance Vapor Pressure (mmHg) A) 275
B) 459
Based on this information compared the characteristics of the two substances?
2. The vapor pressure of dichloromethane, CH2Cl2, at 0 degrees C is 134 mmHg. The normal boiling point of dichloromethane is 40 degrees C. Calculate its molar heat of vaporization?

Calculate the expected ph values of the buffer systems from the experiments (a,b,c,d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

Which of these features are formed when hot groundwater is forced out through cracks in the earth's surface?

You just calculated that the heat of fusion for chloromethane is 6400 j/mol. the heat of fusion for hydrogen is 120 j/mol.? which of the following account for this difference? more than one correcta. chloromethane can absorb more energy at the same temperature. b. hydrogen has stronger intermolecular forces than chloromethane. c. hydrogen molecules can pack more closely than chloromethane molecules. d. chloromethane experiences dipole-dipole interactions. e. chloromethane has a higher molar mass than hydrogen.