Chapter 3 Section #2

Categorize each term as either a physical or chemical change.

For each item in Column A, write the letter of the matching item in Column B.

In a laboratory, 178.8 g of water is separated into hydrogen gas and oxygen gas. The hydrogen gas has a mass of 20.0 g. What is the mass of the oxygen gas produced? Chemical equation H₂O --> H₂ and O₂

As temperature and __________ change, most substances undergo a change from one state (or phase) to another.

Melting and formation of a gas are both __________________ changes and phase changes.

Which terms below are used to describe phase changes in matter.

The new substances formed in the reaction have different ____________________ and different properties from the substances present before the reaction occurred.

In chemical reactions, the starting substances are called _______________________, and the new substances formed are called products.

Which of the following terms represent terms referring to chemical reactions

The law of conservation of mass states that mass is neither created or _________ during a chemical reaction--it is conserved.

According to the law of conservation of mass, mass of the reactants equals the mass of the products.

French scientist Antoine ________________ (1743-1794) was one of the first to use ana analytical balance to monitor chemical reactions.

The color change and production of a ____ are indicators of a chemical reaction.