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 it mean for a chemical equation to be balanced?

Back

A balanced chemical equation has the same number of each type of atom on both sides, following the Law of Conservation of Matter.

Front

What is the Law of Conservation of Matter?

Back

The Law of Conservation of Matter states that matter cannot be created or destroyed in a chemical reaction.

Front

How do you determine the number of atoms in a molecule?

Back

Count the subscripts in the chemical formula; if there is no subscript, it is understood to be 1.

Front

What is the significance of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in the reaction.

Front

What is a balanced equation for photosynthesis?

Back

6CO2 + 6H2O -> C6H12O6 + 6O2.

Front

How many oxygen atoms are in 4H2O?

Back

There are 4 oxygen atoms in 4H2O.

Front

What is the balanced equation for the combustion of methane?

Back

CH4 + 2O2 -> CO2 + 2H2O.