List two guidelines for maintaining a sterile field

Sterilization is required when providing therapy to patients in which scenario:

Which of the following will have the highest average kinetic energy?

The volume of a balloon filled with He at 755 mmHg is expanded from 2.20 L to 6.60 L at a constant temperature. What is the final pressure (in atm) of the the balloon? (760 mmHg = 1 atm)

A chamber contains equal molar amounts of He, Ne, Ar, and Kr. If the total chamber pressure is 1 atm, then the partial pressure (in atm) of Kr is:

Which one of the following gases would be expected to have the highest speed if all the gases were at the same temperature?

At what temperature (in K) does sulfur tetrafluoride have a density of 0.255 g/L at 0.0721 atm?

Which of the following is a form of kinetic energy?

A heat of formation is:

Which one of the following processes is exothermic?