the numbers in front of each component in the equation show how many particles of the reactants are needed and how many particles of the products are formed during the reaction. these numbers called?

During a chemical reaction, matter is neither created nor destroyed. this is ?

A system where matter can enter and escape is called?

a better place in which to measure the movement of matter and study reactions that involve gas?

When two or more elements or compounds combine to make a more complex substances, it's called?

the reaction un which compounds break down into simpler products it's called

when one element replaces another element in a compound, or if two elements in different compounds trade places it's called?

A change in matter that produces one or more new substances is called?

Bending, crushing, cutting, melting , and freezing are all chemical change?

Burning and rusting are both examples of chemical change?

which of the following is evidence of chemical change?

Mixing two liquids may produce a precipitate which is a solid that forms from liquids?

the energy released as the products form is greater than the energy required to break the bonds of the reactants it's known as?

more energy is required to breakthe bonds of the reactants than is released by the formation of the products

Substances that are formed as a result of reaction it’s called?