Which sequence represents the relationship between temperature and volume as explained by the kinetic-molecular theory?
O higher temperature more kinetic energy → more space between particles – higher volume
higher temperature → less kinetic energy – less space between particles – higher volume
higher temperature → more kinetic energy less space between particles - lower volume
higher temperature → less kinetic energy → more space between particles lower volume

Explanation:

The kinetic energy of a gas molecule is given by :

It means, whenever the temperature of gas is increased, its kinetic energy will increase and the space between the particles gets increase. So, the space in which particles can collide with each other increases i.e. its volume gets high.

Hence, the correct option is (A). "higher temperature more kinetic energy → more space between particles – higher volume".

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.