Balancing Chemical Equations Practice

The video tutorial explains how to balance a chemical equation, starting with adding up all elements except oxygen, which is left for last. The instructor demonstrates balancing carbon and hydrogen atoms, then revisits oxygen balancing by adjusting coefficients. Finally, the tutorial shows how to convert coefficients to whole numbers for a balanced equation of C6H6 plus O2 yielding CO2 plus H2O.

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

• 5

• 4

• 3

• 2

How many carbon atoms are needed on the reactant side to balance the equation?

• 4

• 5

• 6

• 7

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

• 3

• 2

• 4

• 5

After adjusting for carbon and hydrogen, how many oxygen atoms are on the product side?

• 15

• 12

• 13

• 14

What is the trick used to balance the oxygen atoms on both sides of the equation?

• Multiply by 3

• Multiply by 5

• Multiply by 15/2

• Multiply by 2

What is the final coefficient for O2 to balance the equation with whole numbers?

• 10

• 12

• 14

• 15

What is the final coefficient for C6H6 to balance the equation with whole numbers?

• 3

• 2

• 1

• 4

What is the final coefficient for CO2 to balance the equation with whole numbers?

• 12

• 10

• 14

• 16

What is the final coefficient for H2O to balance the equation with whole numbers?

• 7

• 6

• 5

• 4

What is the balanced chemical equation for C6H6 + O2 yields CO2 + H2O with whole number coefficients?

• C6H6 + 15O2 → 12CO2 + 6H2O

• 2C6H6 + 15O2 → 12CO2 + 6H2O

• C6H6 + 7.5O2 → 6CO2 + 3H2O

• 2C6H6 + 7.5O2 → 6CO2 + 3H2O