Is the speed kinetic energy relationship directly proportional as one variable increases the other increases or inversely proportional as one variable increases the other decreases

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

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.

All forces cause motion? true or false