Balancing Chemical Equations

The video tutorial explains how to balance a combination reaction involving aluminum and nitrogen to form aluminum nitride. It begins by counting the atoms on both sides of the equation, identifying the need to balance nitrogen atoms first by adding a coefficient of 2 in front of aluminum nitride. This adjustment balances the nitrogen atoms. Next, the aluminum atoms are balanced by placing a coefficient of 2 in front of aluminum. The tutorial concludes with a balanced equation and a brief closing remark.

What is the initial number of nitrogen atoms on the reactant side of the equation?

• One

• Two

• Three

• Four

How many aluminum atoms are present on the product side before balancing?

• Two

• Three

• One

• Four

What coefficient is added in front of aluminum nitride to balance the nitrogen atoms?

• 3

• 4

• 2

• 1

After balancing nitrogen, how many nitrogen atoms are on each side of the equation?

• Four

• Three

• Two

• One

What coefficient is used in front of aluminum to balance the equation?

• 3

• 2

• 1

• 4

What is the final balanced equation for the reaction between aluminum and nitrogen?

• 2Al + N2 → 2AlN

• Al + N2 → AlN

• Al + 2N2 → AlN2

• 2Al + 3N2 → 2AlN3