Chemical Equations

Front

What is a chemical equation?

Back

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

Front

What are reactants in a chemical equation?

Back

Reactants are the substances that undergo a chemical change in a reaction, found on the left side of the equation.

Front

What are products in a chemical equation?

Back

Products are the substances formed as a result of a chemical reaction, found on the right side of the equation.

Front

What does the subscript in a chemical formula indicate?

Back

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

Front

What is the difference between a molecule and an atom?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

How many atoms are in a molecule of water (H2O)?

Back

A molecule of water contains 3 atoms: 2 hydrogen (H) atoms and 1 oxygen (O) atom.

Front

What does the coefficient in a chemical formula represent?

Back

The coefficient indicates the number of molecules or moles of a substance in a reaction.

Front

What is the law of conservation of mass?

Back

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

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation.

Front

What is the formula for calculating the number of hydrogen atoms in a compound?

Back

To calculate the number of hydrogen atoms, multiply the coefficient by the subscript of hydrogen in the formula.