Counting atoms and Balancing equations

Front

How many atoms of aluminum are on each side of the equation: 4Al + 3O₂ --> 2Al₂O₃?

Back

4

Front

How many oxygen atoms are in Al₂(SO₄)₃?

Back

12

Front

In the equation 2Mg + O₂ --> 2MgO, which are the reactants?

Back

Mg and O

Front

What does the Law of Conservation of Mass state?

Back

Matter cannot be gained or lost in a chemical reaction.

Front

How many nitrogen atoms are in (NH₄)₂CrO₄?

Back

2

Front

What is the total number of atoms in the compound C₆H₁₂O₆?

Back

24 (6 Carbon, 12 Hydrogen, 6 Oxygen)

Front

What is a balanced chemical equation?

Back

An equation where the number of atoms for each element is the same on both sides.

Front

What is the coefficient in a chemical equation?

Back

A number placed before a compound to indicate how many molecules are involved.

Front

How do you determine the number of atoms in a polyatomic ion?

Back

Count the atoms in the formula of the ion.

Front

What is the significance of balancing chemical equations?

Back

It ensures the Law of Conservation of Mass is upheld.