Home
Back
Molar Mass Formula:
| From: | To: |
Molar mass is the mass of one mole of a substance (chemical element or chemical compound). It is a physical property defined as the mass of a given substance divided by the amount of substance. The molar mass is typically expressed in grams per mole (g/mol).
The calculator uses the molar mass formula:
Where:
Explanation: The calculator sums the atomic masses of all atoms in a molecule to determine its molar mass.
Details: Molar mass is crucial for converting between grams and moles of a substance, which is fundamental in stoichiometric calculations in chemistry. It's used in preparing solutions, determining reaction yields, and analyzing chemical compositions.
Tips: Enter chemical elements separated by commas. For elements with multiple atoms, include the count (e.g., "H2,O" for water). The calculator recognizes standard element symbols (case insensitive).
Q1: What's the difference between molar mass and molecular weight?
A: While often used interchangeably, molar mass refers to mass per mole (g/mol) while molecular weight is dimensionless (relative to carbon-12).
Q2: How accurate are the atomic weights used?
A: The calculator uses standard atomic weights based on IUPAC recommendations, accounting for natural isotopic distributions.
Q3: Can I calculate molar mass for complex compounds?
A: Yes, enter all elements with their counts (e.g., "C6,H12,O6" for glucose). Parentheses are not currently supported.
Q4: Why is molar mass important in chemistry?
A: It's essential for stoichiometric calculations, determining reaction quantities, and preparing solutions with precise concentrations.
Q5: How do I calculate molar mass for hydrates?
A: Include water molecules in your calculation (e.g., "Cu,S,O4,5,H2,O" for copper(II) sulfate pentahydrate).