Interactions of Matter: Lesson 2-LOCOM

Front

What is the chemical formula for water?

Back

H₂O

Front

How many hydrogen atoms are in the chemical formula 3H₂O?

Back

6 hydrogen atoms

Front

What are reactants in a chemical reaction?

Back

Substances that undergo change during a chemical reaction.

Front

What is a balanced chemical equation?

Back

An equation where the number of atoms for each element is the same on both sides.

Front

What is the coefficient in a chemical formula?

Back

A number placed in front of a chemical formula to indicate how many molecules are involved.

Front

What is an open system in terms of matter?

Back

A system that allows matter and energy to flow freely in and out.

Front

What is a closed system in terms of matter?

Back

A system that does not allow matter to enter or leave.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a product in a chemical reaction?

Back

The substances that are formed as a result of a chemical reaction.

Front

What does it mean for a chemical equation to be unbalanced?

Back

The number of atoms for at least one element is different on each side of the equation.