Fluorine is a pale yellow gas at room temperature. It is very toxic and has a pungent odor. How do you know that fluorine is a nonmetal? A. It is toxic, and reactive

B. It has a pungent odor

C. It is on the left side of PT

D. It is a gas at room temperature
D
A
C
B

The answer is 1.82 j/g°c                  

Heat is involved in chemical change in two ways; chemical changes either result in heat being added to or removed from an object, and chemical changes require a certain amount of heat before they can take place.

Pretty sure it's d. heterogeneous is separated by physical properties. 

Polyethylene is a strong synthetic polymer that can be used to make toys and bottles. polyethylene is a plastic material called thermoplastic. one very useful property of thermoplastic is that when it is heated it turns into liquid, which can be molded into desired shape and size. also the material do not dissolve at room temperature.