Molar Mass of Aluminum Dichromate (Al2(Cr2O7)3)
Molar Mass of Aluminum Dichromate makes it easier to move between measured grams and moles in classroom precipitation problems. Molar Mass of Al₂(Cr₂O₇)₃ is 701.92 g/mol, based on 3 element types, with O contributing the largest share.
For fast checks, use the calculate molar mass, verify element values in the periodic table with molar mass, or explore more molar mass calculations.
Molar Mass of Aluminum Dichromate is:
701.92 g/mol
Molar Mass of Al₂(Cr₂O₇)₃ equals 701.92 g/mol, so 701.92 grams is one mole.
Element Breakdown Table
| Element | Count | Atomic mass | Calculation | Contribution |
|---|---|---|---|---|
| Aluminum (Al) | 2 | 26.98 | 2 x 26.98 | 53.96 g/mol |
| Chromium (Cr) | 6 | 52.00 | 6 x 52.00 | 311.98 g/mol |
| Oxygen (O) | 21 | 16.00 | 21 x 16.00 | 335.98 g/mol |
Final molar mass 53.960 + 311.980 + 335.980 | 701.92 g/mol | |||
Computing Molar Mass of Aluminum Dichromate Step by Step
Molar Mass of Aluminum Dichromate: Step-by-Step Calculation
1. Identify Element Counts
Read Al2(Cr2O7)3 and list how many atoms of each element are present:
- 2 atoms of Aluminum (Al)
- 6 atoms of Chromium (Cr)
- 21 atoms of Oxygen (O)
2. Determine Atomic Masses
Look up each element mass from the periodic table:
- Aluminum (Al) ~= 26.982 g/mol
- Chromium (Cr) ~= 51.996 g/mol
- Oxygen (O) ~= 15.999 g/mol
3. Multiply Atomic Mass by Quantity
Multiply atom count by atomic mass for each element:
- Aluminum (Al): 2 x 26.982 = 53.960 g/mol
- Chromium (Cr): 6 x 51.996 = 311.980 g/mol
- Oxygen (O): 21 x 15.999 = 335.980 g/mol
4. Sum Total Molar Mass
Add all contributions to get the final molar mass in g/mol.
Molar Mass = (2 x 26.982 + 6 x 51.996 + 21 x 15.999)
Molar Mass = 53.960 + 311.980 + 335.980
Molar Mass = 701.920 g/mol
Final rounded value shown on this page: 701.92 g/mol.
Visual Calculation Chart
| Element | Count | Mass | Count x mass | Contribution |
|---|---|---|---|---|
| Aluminum (Al) | 2 | 26.982 | 2 x 26.982 | = 53.960 |
| Chromium (Cr) | 6 | 51.996 | 6 x 51.996 | = 311.980 |
| Oxygen (O) | 21 | 15.999 | 21 x 15.999 | = 335.980 |
Final molar mass 53.960 + 311.980 + 335.980 | = 701.920 | |||
When you move to another formula, molar mass calculations gives you the same step-by-step method for quick revision.
Easy Way to Remember
Easy way to remember Molar Mass of Aluminum Dichromate
- Molar Mass of Aluminum Dichromate: 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 |
|---|---|
| Double displacement | AgNO₃ + NaCl → AgCl + NaNO₃ |
| Acid-salt reaction | Na₂CO₃ + ₂HCl → ₂NaCl + H₂O + CO₂ |
Do You Know?
– Aluminum Dichromate contains 3 element types: Al, Cr, O.
– O contributes the largest share of this compound's total molar mass.
– In Al₂(Cr₂O₇)₃, O appears with the highest atom count.
– Its molar mass is 701.92 g/mol, which is used directly in gram-to-mole conversions.
– A common reaction for Aluminum Dichromate is double displacement (AgNO₃ + NaCl → AgCl + NaNO₃).
Why This Compound Matters
Aluminum Dichromate appears in ionic-reaction practice and precipitation examples in school chemistry.
Its molar mass helps students move quickly between grams, moles, and concentration problems.
Similar calculations can be compared with Aluminum Chromate (Al2(CrO4)3) and Sodium Chromate (Na2CrO4).
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 Al₂(Cr₂O₇)₃ and miscounting atoms.
- Forgetting that parentheses in Al₂(Cr₂O₇)₃ multiply the entire grouped part.
- Mixing up O element contribution with total molar mass.
- Reporting a value without units; final answer should be in g/mol for Aluminum Dichromate.
Quick Revision
Formula: Al2(Cr2O7)3
Molar Mass: 701.92 g/mol
Key takeaway: count atoms accurately, multiply by atomic masses, and sum only at the end.
Formula Explanation
Al2(Cr2O7)3 contains Aluminum (Al) (2), Chromium (Cr) (6), Oxygen (O) (21). Add each element contribution to get total molar mass.
FAQ
Conclusion
Molar Mass of Aluminum Dichromate and Molar Mass of Al₂(Cr₂O₇)₃ are now easy to revise with this structured page. You can use this method in exams, lab reports, and daily chemistry practice.