Molar Mass of Calcium Dichromate (CaCr2O7)
Molar Mass of Calcium Dichromate is a key number in salt-related stoichiometry, especially when balancing reactants and products. Molar Mass of CaCr₂O₇ is 256.06 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 page.
Molar Mass of Calcium Dichromate is:
256.06 g/mol
Molar Mass of CaCr₂O₇ equals 256.06 g/mol, so 256.06 grams is one mole.
Element Breakdown Table
| Element | Count | Atomic mass | Calculation | Contribution |
|---|---|---|---|---|
| Calcium (Ca) | 1 | 40.08 | 1 x 40.08 | 40.08 g/mol |
| Chromium (Cr) | 2 | 52.00 | 2 x 52.00 | 103.99 g/mol |
| Oxygen (O) | 7 | 16.00 | 7 x 16.00 | 111.99 g/mol |
Final molar mass 40.080 + 103.990 + 111.990 | 256.06 g/mol | |||
Computing Molar Mass of Calcium Dichromate Step by Step
Molar Mass of Calcium Dichromate: Step-by-Step Calculation
1. Identify Element Counts
Read CaCr2O7 and list how many atoms of each element are present:
- 1 atom of Calcium (Ca)
- 2 atoms of Chromium (Cr)
- 7 atoms of Oxygen (O)
2. Determine Atomic Masses
Look up each element mass from the periodic table:
- Calcium (Ca) ~= 40.078 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:
- Calcium (Ca): 1 x 40.078 = 40.080 g/mol
- Chromium (Cr): 2 x 51.996 = 103.990 g/mol
- Oxygen (O): 7 x 15.999 = 111.990 g/mol
4. Sum Total Molar Mass
Add all contributions to get the final molar mass in g/mol.
Molar Mass = (1 x 40.078 + 2 x 51.996 + 7 x 15.999)
Molar Mass = 40.080 + 103.990 + 111.990
Molar Mass = 256.060 g/mol
Final rounded value shown on this page: 256.06 g/mol.
Visual Calculation Chart
| Element | Count | Mass | Count x mass | Contribution |
|---|---|---|---|---|
| Calcium (Ca) | 1 | 40.078 | 1 x 40.078 | = 40.080 |
| Chromium (Cr) | 2 | 51.996 | 2 x 51.996 | = 103.990 |
| Oxygen (O) | 7 | 15.999 | 7 x 15.999 | = 111.990 |
Final molar mass 40.080 + 103.990 + 111.990 | = 256.060 | |||
Easy Way to Remember
Easy way to remember Molar Mass of Calcium Dichromate
- Molar Mass of Calcium 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 |
Use these reactions with molar mass guide when you need the molar mass for each species.
Do You Know?
– Calcium Dichromate contains 3 element types: Ca, Cr, O.
– O contributes the largest share of this compound's total molar mass.
– In CaCr₂O₇, O appears with the highest atom count.
– Its molar mass is 256.06 g/mol, which is used directly in gram-to-mole conversions.
– A common reaction for Calcium Dichromate is double displacement (AgNO₃ + NaCl → AgCl + NaNO₃).
Why This Compound Matters
Calcium 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 Calcium Chromate (CaCrO4) and Calcium Carbonate (CaCO3).
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 CaCr₂O₇ and miscounting atoms.
- Rounding atomic masses too early before finishing all multiplication steps.
- Mixing up O element contribution with total molar mass.
- Reporting a value without units; final answer should be in g/mol for Calcium Dichromate.
Quick Revision
Formula: CaCr2O7
Molar Mass: 256.06 g/mol
Key takeaway: count atoms accurately, multiply by atomic masses, and sum only at the end.
Formula Explanation
CaCr2O7 contains Calcium (Ca) (1), Chromium (Cr) (2), Oxygen (O) (7). Add each element contribution to get total molar mass.
FAQ
Conclusion
Molar Mass of Calcium Dichromate and Molar Mass of CaCr₂O₇ are now easy to revise with this structured page. You can use this method in exams, lab reports, and daily chemistry practice.