Acertain quantity of matter is called what?

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

The chemical formula for emerald is be3al2(sio3)6.an emerald can be decided as

Select the correct answer. wax is a nonpolar substance. in which type of substance is it the most soluble?