Chemical equation practice

What is a chemical reaction?

• The reactants and the products.

• The total mass of the reactants is equal to the total mass of the products.

• The total coefficients and and products.

• two or more substances reacting to each other and creating a new substance.

What does a chemical equation represent?

• The number of reactants.

• What is happening in a chemical reaction.

• The number of products.

• The number of atoms of an element present.

In a chemical formula the coefficient tells you...

• How many elements are in the equation.

• How many molecules of a substance are in the equation.

• How many atoms of an element are in the equation.

• How many reactants or products are in the equation

In a chemical formula the subscript tells you...

• How many elements are in the equation.

• How many molecules are in the equation.

• How many atoms of an element are in the equation.

• How many reactants or products are in the equation

What is an element?

• A pure substance, that cannot be broken down into a simpler substance. Can be found on the periodic table.

• Two or more atoms connected together, may or may not be of the same element.

• Two or more atoms of different elements connected to each other.

• The total number of atoms in a molecule.

What is an molecule?

• A pure substance, that cannot be broken down into a simpler substance. Can be found on the periodic table.

• Two or more atoms connected together, that may or may not be of the same element.

• Two or more atoms of different elements connected to each other.

• The total number of atoms in a molecule.

What is an Compound?

• A pure substance, that cannot be broken down into a simpler substance. Can be found on the periodic table.

• Two or more atoms connected together, that may or may not be of the same element.

• Two or more atoms of different elements connected to each other.

• The total number of atoms in a molecule.

What is a reactant?

• Substances that are reacting to cause a chemical reaction. They are the start of a chemical equation.

• Substances that are created as a result of a chemical reaction. They are the end of a chemical equation.

• They tell you how many molecules are in a chemical formula.

• They tell you how many atoms are in a chemical formula.

What is a product?

• Substances that are reacting to cause a chemical reaction. They are the start of a chemical equation.

• Substances that are created as a result of a chemical reaction. They are the end of a chemical equation.

• They tell you how many molecules are in a chemical formula.

• They tell you how many atoms are in a chemical formula.

Which of the following is an example of a chemical formula for water?

• 6H₂O + 6CO₂ ---> C₆H₁₂O₆ + 6O₂

• H₂O

• 6H₂O + 6CO₂

• C₆H₁₂O₆ + 6O₂