If ions change places and a gas is formed, then what type of reaction is indicated?

a) double-displacement
b) decomposition
c) synthesis

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.

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years