Balancing Equations

Front

What do the blue numbers in a chemical formula represent?

Back

Subscripts

Front

What is a coefficient in a chemical equation?

Back

The large number to the left of a formula.

Front

Fill in the blanks with coefficients: PCl5 + _ H2O → _ HCl + H3PO4

Back

4, 5

Front

Is the equation N2 + H2 = NH4 balanced or unbalanced?

Back

Unbalanced

Front

Which side of a chemical equation is the product side?

Back

Right (after the yields sign)

Front

What is the purpose of balancing chemical equations?

Back

To ensure that the number of atoms for each element is the same on both sides of the equation.

Front

What does it mean if a chemical equation is balanced?

Back

The number of atoms of each element is equal on both sides of the equation.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a reactant in a chemical equation?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical equation?

Back

A substance that is formed as a result of a chemical reaction.