Balancing Chemical Equations Practice

This video tutorial demonstrates how to balance the chemical equation for iron sulfide (FeS2) reacting with oxygen (O2). The instructor explains the process of counting atoms on both sides of the equation and adjusting coefficients to achieve balance. The focus is on balancing oxygen atoms by making their count even, followed by balancing iron and sulfur atoms. The tutorial concludes with a balanced equation and emphasizes the strategy of leaving oxygen balancing until the end.

What is the initial count of sulfur atoms on the reactant side in the equation FeS2 + O2?

• Four

• Three

• Two

• One

Why is it beneficial to convert an odd number of oxygens to an even number when balancing equations?

• It decreases the number of products.

• It increases the number of reactants.

• It makes the equation more complex.

• It simplifies the balancing process.

What coefficient is used to balance the iron atoms in the equation?

• Two

• Three

• Four

• Five

How many sulfur atoms are present on the product side after balancing?

• Six

• Ten

• Four

• Eight

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

• Twenty-four

• Eighteen

• Twenty

• Twenty-two

What is the final coefficient for O2 to balance the equation?

• Twelve

• Eleven

• Ten

• Nine

What is the main strategy used to balance the equation in this video?

• Balancing hydrogen atoms first.

• Balancing all atoms simultaneously.

• Balancing sulfur atoms first.

• Balancing oxygen atoms last.

What is the product formed when FeS2 reacts with O2?

• Iron sulfate and water

• Iron sulfide and oxygen

• Iron oxide and sulfur dioxide

• Iron sulfide and sulfur dioxide

Why is it easier to balance oxygen atoms last in this equation?

• Oxygen is a catalyst.

• Oxygen is by itself.

• Oxygen is a product.

• Oxygen is a reactant.

What is the role of Dr. B in the video?

• He is a chemist.

• He is a teacher.

• He is a student.

• He is the narrator.