Balancing Equations Practice

Front

What does the principle of conservation of mass mean in chemical reactions?

Back

Matter is not created or destroyed.

Front

Is the equation Al + O2 → Al2O3 balanced or unbalanced?

Back

Unbalanced

Front

Is the equation Al + O2 → 2Al2O3 balanced?

Back

No

Front

What is the term for the small number written below an element in a chemical formula?

Back

Subscript

Front

How many Oxygen atoms are in 4H2O?

Back

4

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 a coefficient in a chemical equation?

Back

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

Front

What does it mean if a chemical equation is unbalanced?

Back

The number of atoms of each element is not equal on both sides of the equation.

Front

What is the product in a chemical reaction?

Back

The substances formed as a result of a chemical reaction.

Front

What is the reactant in a chemical reaction?

Back

The starting substances that undergo change during a chemical reaction.