Frequently Asked Questions
What is molar mass?
Molar mass is the mass of one mole (6.022×10²³ particles) of a substance, expressed in grams per mole (g/mol). It equals the sum of the atomic masses of all atoms in the formula.
How do I enter a chemical formula?
Use standard chemical notation. For example, enter H2O for water, C6H12O6 for glucose, or H2SO4 for sulfuric acid.
What is the difference between molar mass and molecular weight?
Molecular weight is a dimensionless relative mass (in amu), while molar mass has the unit g/mol. Numerically, they are identical.
2026 physical constants