Consider the folloiwng substances: CaO                    O2                 H2CO              CH4 Which of the following is the correct arrangement of these substances from the lowest to the highest normal boiling point? Hint:  Remember that ionic substances melt when the strong ionic bonds are broken.

A 55.0 L tank contains 75.0 g of propane. What is its pressure, in atm, at standard temperature (0°C)? Hint:  molar mass of propane = 44.1 g/mol

Which intermolecular forces are experienced between molecules of NH3?

Which of the following gases would have a faster effusion rate than CO2? Hint: Assume all gases are at the same temperature.

Below are two different pure liquids (Liquid A and Liquid B) shown resting on a flat surface at the same temperature: Which of the following statements concerning these liquids is true?

A mixure of gases with a total pressure of 1.13 atm contains 3.5 mol H2, 7.1 mol CH4, and 1.3 mol CO2. What is the partial pressure (in atm) of hydrogen?

A mixure of gases with a total pressure of 1.13 atm contains 3.5 mol H2, 7.1 mol CH4, and 1.3 mol CO2. What is the partial pressure (in atm) of methane?

Water (H2O) has a normal boiling point of 100°C and ammonia (NH3) has a normal boiling point of -33.3°C. Which ofthe following statements best explains the higher boiling point of water?

What is the name of the entire structure in the figure lettered A? What is the name of the entire structure in the figure lettered B?  (Not drawn to scale.)  filaments.png 

Cervical vertebrae #1 (C1) is also called the