Can an empirical formula be a molecular formula ?

Does the energy in a solid increase or decrease when changing to a liquid?

What effect might melting sea ice have for people who live in coastal areas?

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.