STAAR Review: Chemical Reactions and Density

Front

What are the chemicals on the right side of a chemical equation called?

Back

Products

Front

What are the chemicals on the left side of a chemical equation that react called?

Back

Reactants

Front

What is the formula for calculating density?

Back

D = M/V

Front

How many elements are found in the chemical formula 2H₂SO₄?

Back

3

Front

How many atoms of hydrogen are in the chemical formula 2H₂SO₄?

Back

4

Front

What is a chemical reaction?

Back

A process where reactants transform into products.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a coefficient in a chemical equation?

Back

A number placed before a compound to indicate how many molecules are present.

Front

What is a subscript in a chemical formula?

Back

A number that indicates the number of atoms of an element in a molecule.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance, while a chemical change alters its composition.