Top

# Chemistry Formulas

A chemical formula is an important part of the language of chemistry because it tells us something about the composition of an element or a compound. A formula can be simple as He (helium) or as complicated as C27H46O (cholesterol).

The Chemical Formulas provides information about the atomic composition of a substance, while an equation allows us to describe a chemical reaction using the names or formulas of the reactants and products involved in the process.

## Writing Chemical Formulas

Back to Top
Knowing the names of the elements and few basic rules allows us to name simple compounds given the chemical formula. we also can reverse the process. That is if we know the name of the compound, we should be able to write the chemical formula.
The rules for writing chemical formulas are
1. Write the symbol of each element in the compound.
2. Is there is more than one atom of a particular element in the formula unit, write the number of atoms immediately after the symbol for the element.
Students can also get help from our experts. Additional guidelines based on chemistry formulas are also provided below.
 More topics in Chemistry Formulas Atomic Mass Formula Molar Mass Formula Chemical Formula Chemical Reaction Formula Molarity Formula Molality Formula Enthalpy Formula Entropy Formula Ideal Gas Law Formula Boyle's Law Formula Charles Law Formula Gay Lussac's Law Formula Partial Pressure Formula Gibbs Free Energy Formula Empirical Formula Molecular Formula Structural Formula Dalton's Law Formula Thermodynamics Formulas Rydberg Formula Titration Formula Radioactive Decay Formula Photosynthesis Formula Chemical Compound Formulas Half Life Calculator Moles to Grams Formula Grams to Moles Formula Normality Formula STP Formula Equilibrium Constant Formula
*AP and SAT are registered trademarks of the College Board.