Weegy: Both a and b. If a solid piece of naphthalene is heated and remains at 80 C until it is completely melted, you know that 80 C is the: freezing point of naphthalene, and melting point of naphthalene.
User: Matter that has a definite volume but no definite shape is a
A. liquid.
B. solid.
C. gas.
D. plasma.
(More)