Counting Atoms and Balancing Chemical Equations

Front

How many Hydrogen atoms are in 4H₂O?

Back

8

Front

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

Back

Subscript

Front

Balance this equation: MgCl₂ → ?

Back

4MgCl₂ → Mg₄ + 4Cl₂

Front

How many Magnesium atoms are in 10MgCl₂?

Back

10

Front

How many Oxygens are in the molecule (OH)₂?

Back

2

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 does it mean to balance 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 is the formula for calculating the number of atoms in a molecule?

Back

Count the subscripts for each element and multiply by the coefficient.

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.

Front

How many total atoms are in the molecule C₆H₁₂O₆?

Back

24 (6 Carbon + 12 Hydrogen + 6 Oxygen)