Which of these is true about pure substances?

a) they can only contain one type of atom
b) they may contain one type of atom or one type of molecule
c) they can contain different types of atoms and molecules
d) they can contain only one type of molecule

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

This statement about matter and its behavior is best classified as a

In order for a high temperature boiler or steam engine to produce superheated water, or steam: the heat source must be greater than 100°c the water must be permitted to evaporate quickly the system must be sealed and become pressurized above atmospheric pressure the vapor pressure must be kept below 760 mm(hg)