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Look at the heating/cooling curve for water diagrammed below. Between which two letters is the phase changing of freezing taking place? Response should be in the form “x and y”. 

What intermolecular forces exist between nonpolar molecules?

Refer to the structural formula given below:  What type of intermolecular forces (dipolar, dispersion, or hydrogen bonding) would exist between molecules of CF4?  

The direct change from the vapor state to the solid state is called

Look at the heating/cooling curve for water diagrammed below. Between which two letters is water existing as a solid? Response should be in the form “x and y”. 

Balance the equation below by placing the correct coefficients in the blanks. Your response should list the coefficients in order from left to right, separated only by commas; no spaces. If no coefficient belongs in a blank, represent it with a “1”. For example the equation 2 H2O  → 2 H2+O2 would be represented as 2,2,1. ____O2 + ____As2S3  +  

The correct name for the molecular compound N2O4 is

When a liquid sample is taken from sea level to a higher elevation, what happens to the atmospheric pressure on the liquid and the boiling point of the liquid?

How does the kinetic energy of a particle change if the particle’s temperature is increased?

On a separate sheet of paper, draw the Lewis dot structure for PBr3.  After completing the exam, upload your picture in the Unit 2 Exam pictures dropbox.