Counting Atoms and Balancing Equations

Front

What is the big number before the chemical formula called?

Back

Coefficient

Front

What are the reactants in the chemical equation: Na + Cl₂ -> NaCl?

Back

Na and Cl₂

Front

What is the small number on the bottom of a chemical formula called?

Back

Subscript

Front

How many different elements are present in the equation Na + Cl₂ -> NaCl?

Back

2

Front

How many Oxygen atoms are present in the chemical formula C₆H₁₂O₆?

Back

6

Front

What is the purpose of balancing a chemical equation?

Back

To ensure that the number of atoms for each element is the same on both sides of the equation.

Front

What does a balanced chemical equation represent?

Back

The conservation of mass during a chemical reaction.

Front

In the equation 2H₂ + O₂ -> 2H₂O, what does the '2' in front of H₂ represent?

Back

It represents the coefficient indicating there are 2 molecules of H₂.

Front

What is the total number of atoms in the balanced equation 2Na + Cl₂ -> 2NaCl?

Back

4 atoms (2 Na + 2 Cl).

Front

What is the difference between a coefficient and a subscript?

Back

A coefficient indicates the number of molecules, while a subscript indicates the number of atoms in a molecule.