Cobalt Reactions and Balancing Equations

The video tutorial explains how to balance a chemical equation involving cobalt and oxygen to form cobalt(III) oxide. It begins by clarifying the elements involved, then counts the atoms on each side of the equation. The instructor demonstrates how to balance the equation by adjusting coefficients and explains that the reaction is a synthesis type. The video concludes with a brief mention of the states of matter involved in the reaction.

What is the correct chemical formula for cobalt metal in the given equation?

• Co2

• CO

• C

• Co

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

• Four

• Two

• One

• Three

What is the first step suggested to help balance the equation?

• Add more oxygen molecules

• Decrease the number of reactants

• Make the number of cobalt atoms even

• Increase the number of products

What coefficient is used for cobalt to balance the equation?

• 2

• 4

• 3

• 5

What type of reaction is described when cobalt and oxygen form cobalt(III) oxide?

• Double replacement

• Combination

• Single replacement

• Decomposition

What is the state of oxygen in the reaction?

• Solid

• Aqueous

• Liquid

• Gas

What is the final product formed in the reaction?

• Cobalt(II) oxide

• Cobalt(III) oxide

• Cobalt monoxide

• Cobalt dioxide