When mgco3(s) is strongly heated, it produces solid mgo as gaseous co2 is driven off.
does the oxidation number of carbon change upon the formation of co2?

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.

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?

The identities of substances are the same before and after which type of change