Plz
to calculate the density of a substance divide its mass by its weight.
true or false

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

Is powdered sports drink ionic or covalent ? 10pts !