Balancing Chemical Equations Concepts

The video tutorial explains how to balance the decomposition equation of nitrous acid (HNO2). It begins by counting the atoms on each side of the equation, noting the presence of hydrogen, nitrogen, and oxygen. The tutorial then demonstrates how to balance the equation by adjusting the coefficients, ensuring the number of atoms is equal on both sides. The video concludes with a tip to handle oxygen atoms last when they are spread across multiple compounds.

What is the initial count of hydrogen atoms on the reactant side of the decomposition of HNO2?

• Four

• Three

• Two

• One

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

• Four

• Three

• Two

• One

What coefficient is used in front of HNO2 to balance the hydrogen atoms?

• 4

• 3

• 2

• 1

After balancing hydrogen, how many oxygen atoms are there on the reactant side?

• Three

• Five

• Four

• Two

What is the final count of nitrogen atoms on both sides of the balanced equation?

• Three

• Two

• One

• Four

Why is it often easier to balance oxygen atoms last in a chemical equation?

• Oxygen is less reactive.

• Oxygen atoms are usually in multiple compounds.

• Oxygen is a noble gas.

• Oxygen has a higher atomic mass.