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

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

Complete the following matching pair questions.  You need to draw the Lewis structures on a piece of paper for all the possible formulas before selecting the answers.  No need to send me the paper! Note:  All the numbers in the formulas are subscripts.

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

Which of the following molecule has an overall polarity equal to zero (nonpolar molecule)? Note:  All the numbers shown are subscripts.

How many of the following molecules has/have hydrogen bonding?   H2, H2O, HBr, NH3, CH4, HF

Identify the major intermolecular forces in H2S molecule.

Based on intermolecular forces, which of the following would you expect to have the highest boiling point? (Hint: it is the one with the strongest intermolecular forces) All the numbers in the answers are subscripts (e.g. CO2 is the same as CO2).

Name the type of crystalline solid formed by magnesium fluoride

A practice’s retention schedule protects the