chemical equations basics

Front

What are reactants and products in a chemical reaction?

Back

Reactants are substances that undergo a chemical change, while products are the substances formed as a result of the reaction.

Front

Identify the reactants and products in the reaction: Hydrogen + Oxygen → Water.

Back

Reactants: Hydrogen and Oxygen; Product: Water.

Front

What changes occur in a chemical reaction?

Back

Molecules and compounds are changed during a chemical reaction.

Front

How many elements are present in the compound C6H12O6?

Back

There are 3 elements: Carbon (C), Hydrogen (H), and Oxygen (O).

Front

How many Oxygen (O) atoms are in the compound 2C2HO8Cl2?

Back

There are 16 Oxygen (O) atoms.

Front

What is a molecule?

Back

A molecule is more than one atom bonded together.

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products.

Front

What does the law of conservation of mass state?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved.

Front

What is a subscript in a chemical formula?

Back

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