Balancing Chemical Equations Concepts

In this video, Dr. B demonstrates how to balance the chemical equation for chromium and sulfur. The process begins with counting the atoms on each side of the equation. Since both chromium and sulfur are by themselves, the equation is balanced by adjusting the coefficients. The final balanced equation is presented as chromium plus sulfur yielding chromium(III) sulfide, with coefficients 2, 3, and 1. Dr. B concludes the tutorial by thanking viewers.

What is the initial number of chromium atoms on the reactant side before balancing?

• Two

• One

• Four

• Three

Why is it easy to balance the equation for chromium and sulfur?

• Because both elements are by themselves

• Because both elements are in compounds

• Because they are both metals

• Because they have the same atomic number

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

• 3

• 2

• 4

• 1

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

• One

• Two

• Three

• Four

What is the final set of coefficients for the balanced equation?

• 1, 2, 3

• 2, 3, 1

• 3, 2, 1

• 1, 3, 2