Balancing Equations

Front

What is the number of Na's in Na₂CO₃?

Back

2

Front

Is the equation Fe + S --> FeS balanced?

Back

YES!

Front

What is the little number after an element in a chemical equation called? Example: H₂

Back

Subscript

Front

What does the Law of Conservation of Mass state?

Back

Matter cannot be gained or lost in a chemical reaction.

Front

How many elements are in the compound C₂H₈O?

Back

3

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a compound to indicate how many molecules are present.

Front

What is the purpose of balancing chemical equations?

Back

To ensure that the same number of each type of atom is present on both sides of the equation.

Front

What does it mean if a chemical equation is unbalanced?

Back

It means that the number of atoms of each element is not the same on both sides of the equation.

Front

What is the formula for calculating the total number of atoms in a compound?

Back

Add the subscripts of all elements in the compound.

Front

What is an example of a balanced chemical equation?

Back

2H₂ + O₂ --> 2H₂O