Balancing Chemical Equations Concepts

The video tutorial explains how to balance a chemical equation involving hydrazine (N2H4) and oxygen gas (O2). It begins by counting the atoms on both sides of the equation, then proceeds to balance the nitrogen atoms by adjusting coefficients. The tutorial continues by updating the oxygen count and balancing the hydrogen atoms. Finally, it concludes with a strategy tip to leave oxygen balancing for last, ensuring the equation is balanced. The video emphasizes the importance of systematic balancing and provides a clear example of the process.

What are the initial counts of nitrogen, hydrogen, and oxygen atoms on the reactant side of the equation?

• 1 nitrogen, 4 hydrogen, 2 oxygen

• 2 nitrogen, 2 hydrogen, 4 oxygen

• 1 nitrogen, 2 hydrogen, 3 oxygen

• 2 nitrogen, 4 hydrogen, 2 oxygen

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

• 5

• 2

• 3

• 4

What coefficient is placed in front of NO2 to balance the nitrogen atoms?

• 1

• 2

• 3

• 4

After balancing nitrogen, how many total oxygen atoms are there on the product side?

• 4

• 5

• 6

• 7

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

• 4

• 3

• 2

• 1

After balancing hydrogen, what is the total count of oxygen atoms on the product side?

• 4

• 5

• 6

• 7

What coefficient is placed in front of O2 to balance the equation completely?

• 3

• 2

• 4

• 1

What is a recommended strategy when balancing chemical equations?

• Balance oxygen first

• Balance hydrogen first

• Balance all elements simultaneously

• Leave oxygen to be balanced last