Molar Mass of Octacosane (C28H58)
Molar Mass of Octacosane is helpful for yield calculations and formula checks in carbon-chain reaction questions. Molar Mass of C₂₈H₅₈ is 394.77 g/mol, based on 2 element types, with C contributing the largest share.
For fast checks, use the molar mass calculator, verify element values in the periodic table, or explore more molar mass.
Molar Mass of Octacosane is:
394.77 g/mol
Molar Mass of C₂₈H₅₈ equals 394.77 g/mol, so 394.77 grams is one mole.
Element Breakdown Table
| Element | Count | Atomic mass | Calculation | Contribution |
|---|---|---|---|---|
| Carbon (C) | 28 | 12.01 | 28 x 12.01 | 336.31 g/mol |
| Hydrogen (H) | 58 | 1.01 | 58 x 1.01 | 58.46 g/mol |
Final molar mass 336.310 + 58.460 | 394.77 g/mol | |||
Computing Molar Mass of Octacosane Step by Step
Molar Mass of Octacosane: Step-by-Step Calculation
1. Identify Element Counts
Read C28H58 and list how many atoms of each element are present:
- 28 atoms of Carbon (C)
- 58 atoms of Hydrogen (H)
2. Determine Atomic Masses
Look up each element mass from the periodic table:
- Carbon (C) ~= 12.011 g/mol
- Hydrogen (H) ~= 1.008 g/mol
3. Multiply Atomic Mass by Quantity
Multiply atom count by atomic mass for each element:
- Carbon (C): 28 x 12.011 = 336.310 g/mol
- Hydrogen (H): 58 x 1.008 = 58.460 g/mol
4. Sum Total Molar Mass
Add all contributions to get the final molar mass in g/mol.
Molar Mass = (28 x 12.011 + 58 x 1.008)
Molar Mass = 336.310 + 58.460
Molar Mass = 394.770 g/mol
Final rounded value shown on this page: 394.77 g/mol.
Visual Calculation Chart
| Element | Count | Mass | Count x mass | Contribution |
|---|---|---|---|---|
| Carbon (C) | 28 | 12.011 | 28 x 12.011 | = 336.310 |
| Hydrogen (H) | 58 | 1.008 | 58 x 1.008 | = 58.460 |
Final molar mass 336.310 + 58.460 | = 394.770 | |||
Easy Way to Remember
Easy way to remember Molar Mass of Octacosane
- Molar Mass of Octacosane: count atoms, multiply masses, and add totals.
- Write each element in a table so you do not miss subscripts.
- Keep 2-3 decimals during steps, then round only at the end.
Sample Reactions
| Type | Reaction |
|---|---|
| Combustion | ₂C₂₈H₅₈ + ₈₅O₂ → ₅₆CO₂ + ₅₈H₂O |
| Hydrogenation | C₂₈H₅₈ + H₂ → C₂₈H₆₀ |
Do You Know?
– Octacosane contains 2 element types: C, H.
– C contributes the largest share of this compound's total molar mass.
– In C₂₈H₅₈, H appears with the highest atom count.
– Its molar mass is 394.77 g/mol, which is used directly in gram-to-mole conversions.
– A common reaction for Octacosane is combustion (₂C₂₈H₅₈ + ₈₅O₂ → ₅₆CO₂ + ₅₈H₂O).
For more examples in the same format, browse the related formulas on molar mass page.
Why This Compound Matters
Octacosane matters in organic chemistry, especially for fuel, solvent, or carbon-chain analysis.
Its formula pattern helps students practice molecular composition and yield calculation methods.
Similar calculations can be compared with Benzene (C6H6) and Toluene (C7H8).
Where This Is Used
- Competitive exams and school chemistry tests.
- Lab work when preparing measured solutions.
- Real-world manufacturing and quality checks.
Common Mistakes When Calculating This
- Skipping subscripts in C₂₈H₅₈ and miscounting atoms.
- Rounding atomic masses too early before finishing all multiplication steps.
- Mixing up C element contribution with total molar mass.
- Reporting a value without units; final answer should be in g/mol for Octacosane.
Quick Revision
Formula: C28H58
Molar Mass: 394.77 g/mol
Key takeaway: count atoms accurately, multiply by atomic masses, and sum only at the end.
Formula Explanation
C28H58 contains Carbon (C) (28), Hydrogen (H) (58). Add each element contribution to get total molar mass.
FAQ
Conclusion
Molar Mass of Octacosane and Molar Mass of C₂₈H₅₈ are now easy to revise with this structured page. You can use this method in exams, lab reports, and daily chemistry practice.