What is the mole of 2.50 L oxygen at 325oC and 83.2 atm?  The gas constant is 0.0821 L atm/ K mol.         (a)  0.128 mol               (b) 4.24 mol              (c)  0.236 mol               (d)  42.4 mol            (e)  7.80 mol

Which of the following formulas (Lewis structures) has a total of  7 bonding pair of electrons ( 14 electrons) and 3 non-bonding pair of electrons (6 electrons)? NH2OBr HCl (Hydrochloric acid) C2H5F CHBr3

What is the major intermolecular forces between H of H2O molecule with N (nitrogen) of another molecule of NH3?  

Liquid X boils at a lower temperature (lower boiling point) than liquid Y.  This fact indicates that

What is the bond angle of a molecule with 2 double bonds around the central atom?

The conversion from Cu(liquid) to Cu(solid) is called

The metallic solid is KBr Ca Na2O S no correct answer given    

A gas temperature is changed from 456oC to 303oC.  If the initial volume is 235 mL at constant pressure, what is the final volume?       

An 355 mL of a balloon filled with hydrogen gas has 848 torr at 75oC.  What is the volume of this gas if the pressure and temperature are changed to 375 torr and 64oC, respectively?  (SHOW CALCULATION in the space below).  Must show calculation to get credit!  Without calculations, you will get zero point, even if you get the answer correct.  DO NOT email me your scratch paper. (Hint: make sure you use the correct unit for temperature!)

According to your lecture, the SO3 gas is responsible for