Balancing Chemical Equations Practice

The video tutorial explains how to balance a chemical equation involving C6H12 and O2. It begins by identifying the components of the equation and counting the atoms on both sides. The tutorial then demonstrates balancing carbon and hydrogen atoms before addressing the oxygen atoms. The process concludes with a balanced equation and tips for balancing combustion reactions, emphasizing the importance of counting all oxygen atoms and leaving them for last.

What is the chemical formula for cyclohexane?

• C5H10

• C6H14

• C6H12

• C7H14

How many carbon atoms are present in the reactant C6H12?

• 4

• 5

• 6

• 7

What is the initial number of oxygen atoms on the product side before balancing?

• 5

• 4

• 3

• 2

What coefficient is used in front of CO2 to balance the carbon atoms?

• 7

• 4

• 5

• 6

How many hydrogen atoms are needed on the product side to balance the equation?

• 10

• 12

• 14

• 16

What coefficient is placed in front of H2O to balance the hydrogen atoms?

• 6

• 5

• 7

• 4

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

• 18

• 17

• 16

• 19

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

• 10

• 8

• 9

• 7

Why is it helpful to leave oxygen balancing until last in combustion reactions?

• Oxygen is the easiest to balance.

• Oxygen is the heaviest element.

• Oxygen is often present in multiple compounds.

• Oxygen is the most abundant element.