Balancing Chemical Equations

Front

What does the Law of Conservation of Mass state?

Back

Matter cannot be gained or lost in a chemical reaction.

Front

What is the little number after an element in a chemical equation called? Example: H₂

Back

Subscript

Front

What type of reaction is represented by the equation 2HI → H₂ + I₂?

Back

Decomposition

Front

What type of reaction is represented by the equation Zn + H₂S → ZnS + H₂?

Back

Single replacement

Front

In the equation 2Mg + O₂ → 2MgO, which are the reactants?

Back

Mg and O₂

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate the number of molecules or moles of that substance.

Front

What is the difference between a reactant and a product?

Back

Reactants are substances that undergo a chemical change, while products are the substances formed as a result of the reaction.

Front

What does balancing a chemical equation ensure?

Back

It ensures that the number of atoms for each element is the same on both sides of the equation.

Front

What is a synthesis reaction?

Back

A reaction where two or more substances combine to form a single product.

Front

What is a decomposition reaction?

Back

A reaction where a single compound breaks down into two or more simpler products.