balanced or unbalanced chemical equations

Front

What are the small numbers in a chemical formula called?

Back

Subscripts

Front

Is the equation Ag + O₂ ---> 2Ag₂O balanced or unbalanced?

Back

Unbalanced

Front

Is the equation Fe + S ---> FeS balanced or unbalanced?

Back

Balanced

Front

What do the red numbers in a chemical equation represent?

Back

Coefficients

Front

Which of the following equations is balanced? P₄ + 3O₂ ---> 2P₂O₃, N₄ + 3F₂ ---> 2NF₃, 2LiF + Br₂ ---> 2LiBr + F₄

Back

P₄ + 3O₂ ---> 2P₂O₃

Front

What is a balanced chemical equation?

Back

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

Front

What is an unbalanced chemical equation?

Back

A chemical equation where the number of atoms for each element is not the same on both sides.

Front

What is the purpose of balancing chemical equations?

Back

To obey the law of conservation of mass.

Front

What are coefficients in a chemical equation?

Back

Numbers placed in front of compounds to indicate how many molecules are involved.

Front

What is the law of conservation of mass?

Back

Matter cannot be created or destroyed in a chemical reaction.