Balancing Chemical Equations

Front

Is the following equation balanced or unbalanced? K + 2 MgBr --> KBr + Mg

Back

Unbalanced

Front

The large number before a molecule is called a _____________.

Back

Coefficient

Front

Is the following equation balanced or unbalanced? 4 Fe + 3 O2 --> 2 Fe2O3

Back

Balanced

Front

The ____________ are either elements or compounds which are present prior to or before a chemical reaction.

Back

Reactants

Front

Balance the following equation: CH4 + 4 Cl2 → CCl4 + _____ HCl. What coefficient is needed in front of HCl?

Back

4

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 are reactants in a chemical reaction?

Back

Substances that undergo change during a chemical reaction.

Front

What are products in a chemical reaction?

Back

Substances that are formed as a result of a chemical reaction.

Front

What does a subscript in a chemical formula indicate?

Back

The number of atoms of an element in a molecule.

Front

What is the purpose of balancing chemical equations?

Back

To obey the law of conservation of mass.