Balancing Chemical Equations Concepts

This video tutorial explains how to balance the chemical equation NH3 + O2 yields NO2 + H2O. It begins by counting the atoms in the reactants and products, then discusses a strategy for balancing the equation by adjusting coefficients. The tutorial demonstrates using fractions to balance the equation and converting these to whole numbers if preferred. The video concludes with a balanced equation using both fractional and whole number coefficients.

What is the initial number of nitrogen atoms on the reactant side in the equation NH3 + O2 yields NO2 + H2O?

• 2

• 4

• 1

• 3

Why is it suggested to leave oxygen balancing until the end?

• Oxygen is the heaviest element.

• Oxygen is present in all compounds.

• Oxygen is the most abundant element.

• Oxygen is by itself and doesn't affect other elements.

What coefficient is initially placed in front of NH3 to balance hydrogen atoms?

• 4

• 3

• 2

• 1

How many nitrogen atoms are there on the product side after placing a coefficient of 2 in front of NO2?

• 4

• 3

• 2

• 1

What is the total number of oxygen atoms on the product side after balancing with fractions?

• 5

• 8

• 6

• 7

What fraction is used to balance the oxygen atoms in the equation?

• 7/2

• 5/2

• 3/2

• 1/2

What is the coefficient of O2 when the equation is balanced using whole numbers?

• 7

• 6

• 5

• 3

What is the final coefficient of NH3 in the balanced equation with whole numbers?

• 2

• 4

• 3

• 5

What is the final coefficient of H2O in the balanced equation with whole numbers?

• 7

• 6

• 5

• 4

Why might some teachers prefer not to use fractions in balanced equations?

• Fractions are not visually appealing.

• Fractions make calculations complex.

• Fractions are not allowed in chemistry.

• Fractions are harder to understand.