🎓 Chemistry • Mole Calculations
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Molar Mass Calculator
Calculates the molar mass (g/mol) of chemical formulas including hydrates and parentheses, providing elemental percent mass breakdown.
Chemical Formula Evaluator
Supports brackets, parenthesis, and hydrates (e.g. Ca(OH)₂, C₆H₁₂O₆, CuSO₄·5H₂O)
Total Molar Mass (Molecular Weight)
180.156 g/mol
Unified Mass (u / Da)
180.156 u
SI Molar Mass
0.180156 kg/mol
Total Atoms
24 atoms/molecule
Empirical Formula
CH2O
Visual Mass Fraction Breakdown
Total180.156g/mol
O (Oxygen)
53.3%
C (Carbon)
40.0%
H (Hydrogen)
6.7%
| Element | Atoms (n) | Standard Weight | Subtotal Mass | Mass Percent |
|---|---|---|---|---|
| O Oxygen Z = 8 • nonmetal | 6 | 15.999 | 95.994 g/mol | 53.28% |
| C Carbon Z = 6 • nonmetal | 6 | 12.011 | 72.066 g/mol | 40.00% |
| H Hydrogen Z = 1 • nonmetal | 12 | 1.008 | 12.096 g/mol | 6.71% |
Complete Chemical & Mathematical Derivation
1. Formula Decomposition: Found 3 unique elements totaling 24 atoms per formula unit. 2. Element-by-Element Mass Contributions: • Oxygen (O, Z=8): 6 atoms × 15.999 g/mol = 95.9940 g/mol (53.28%) • Carbon (C, Z=6): 6 atoms × 12.011 g/mol = 72.0660 g/mol (40.00%) • Hydrogen (H, Z=1): 12 atoms × 1.008 g/mol = 12.0960 g/mol (6.71%) 3. Total Molecular Mass: M = 95.994 + 72.066 + 12.096 = 180.1560 g/mol 4. Empirical Formula: CH2O (Common divisor = 6)
What is Molar Mass?
Molar mass is the mass of one mole of a chemical substance, expressed in grams per mole (g/mol).
It is computed by summing the standard atomic weights of all constituent atoms in the chemical formula.
Formula & Step-by-Step Calculation
M = Σ (n_i × A_i)
Sum of the number of atoms of each element times its standard atomic weight.
Worked Step-by-Step Examples
Example 1
Calculate the molar mass of Glucose (C6H12O6)
Solution: 180.156 g/mol
• (6 × 12.011) + (12 × 1.008) + (6 × 15.999) = 72.066 + 12.096 + 95.994 = 180.156 g/mol
Common Real-World & Academic Use Cases
- ✓ Reagent mass weighing in stoichiometry
- ✓ Converting grams to moles in analytical labs
- ✓ Mass spectrometry formula verification
How to Use the Molar Mass Calculator
1
Type Chemical Formula
Enter formulas like H2O, Ca(OH)2, or CuSO4*5H2O.
2
Read Molar Mass
Inspect total g/mol and elemental mass percentage breakdown.
Frequently Asked Questions
Q: Does case matter in chemical formulas?
Yes, chemical symbols are case-sensitive: Co is Cobalt, while CO is Carbon Monoxide.