Chemistry final review #1

Front

Chemical equations must be balanced to satisfy ____.

Back

The law of conservation of mass.

Front

Which of the following statements is NOT true about what happens in all chemical reactions?

Back

New atoms are formed as products.

Front

What is a positively charged subatomic particle?

Back

Proton.

Front

What is the smallest particle of an element that retains the properties of that element?

Back

Atom.

Front

A chemical change occurs when a piece of wood ___.

Back

Rots.

Front

What is the law of definite proportions?

Back

A chemical compound contains its component elements in fixed ratio by mass.

Front

What is the law of multiple proportions?

Back

When two elements form more than one compound, the ratios of the masses of the second element that combine with a fixed mass of the first element can be expressed in small whole numbers.

Front

What is Avogadro's principle?

Back

Equal volumes of gases, at the same temperature and pressure, contain an equal number of molecules.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What are reactants in a chemical reaction?

Back

The starting substances that undergo change.