Counting atoms and balancing equations

Here are the directions:

1. Identify the elements on both sides of the equation.

2. Count the atoms of each element on both sides of the equation.

3. Use coefficients when needed to balance the

equation.

Example:

Ca + O2 --> CaO

Ca - 1 Ca - 1

O - 2 O - 1

Quiz:

1. N2 + H2 -->NH2

2. K + Cl2 --> KCl

3. K + Br2 -->KBr