Balancing Chemical Equations and Reactions

The video tutorial explains a combination reaction where nitrogen (N2) and oxygen (O2) combine to form nitrogen dioxide (NO2). It demonstrates how to balance the chemical equation by adjusting coefficients to ensure the number of atoms for each element is equal on both sides. The process involves balancing nitrogen atoms first, followed by oxygen atoms, resulting in a balanced chemical equation.

What type of reaction involves N2 and O2 combining to form NO2?

• Decomposition reaction

• Combination reaction

• Single replacement reaction

• Double replacement reaction

How many nitrogen atoms are present on the reactant side before balancing?

• Four

• Three

• One

• Two

What coefficient is placed in front of NO2 to balance the nitrogen atoms?

• 3

• 2

• 4

• 1

After balancing nitrogen, how many oxygen atoms are present on the product side?

• Two

• Three

• Four

• Five

What coefficient is used in front of O2 to balance the oxygen atoms?

• 4

• 1

• 2

• 3

What is the balanced chemical equation for the reaction between N2 and O2?

• N2 + O2 → NO2

• N2 + O2 → 2NO2

• N2 + 2O2 → 2NO2

• 2N2 + O2 → 2NO2