Chemistry Formula
Molecular Weight Formula Formula
Calculates molecular weight by adding the atomic masses of all atoms in a compound.
Formula Summary
Molecular Weight Formula
Calculates molecular weight by adding the atomic masses of all atoms in a compound.
- Category
- Chemistry
- Equation
- MW = Σ atomic masses
- Calculator
- Use Molecular Weight Formula Calculator →
Equation
MW = Σ atomic masses
Variables
- MW = molecular weight
- atomic masses = masses of atoms
Units
- Molecular Weight: atomic mass units (u) or grams per mole (g/mol)
- Atomic Mass: atomic mass units (u)
When To Use This Formula
Use this formula when calculating the molecular weight of a compound by adding the atomic masses of all atoms present in its chemical formula.
Rearranged Equations
- Total Atomic Mass = MW
How to Use This Formula
- Identify the known values from the problem statement.
- Convert all values into compatible units.
- Substitute the values into the equation and calculate the result.
- Check that the final answer has the correct unit and meaning.