Chemical Reactions

Front

What is a coefficient?

Back

The large number to the left of a formula.

Front

How many Al atoms are in the compound 4Al₂O₃?

Back

8

Front

Is the equation 2H₂O + O₂ --> 4MgO + 3Fe balanced?

Back

No

Front

What do the blue numbers in a chemical formula represent?

Back

Subscripts.

Front

Balance the equation: MgCl₂ --> Mg₄ + Cl₂.

Back

4MgCl₂ --> Mg₄ + 4Cl₂.

Front

What is a chemical reaction?

Back

A process where substances (reactants) transform into new substances (products).

Front

What are reactants in a chemical equation?

Back

The starting substances that undergo a chemical change.

Front

What are products in a chemical equation?

Back

The substances formed as a result of a chemical reaction.

Front

What does it mean for a chemical equation to be balanced?

Back

It has the same number of each type of atom on both sides of the equation.

Front

What is a subscript in a chemical formula?

Back

A small number that indicates the number of atoms of an element in a molecule.