Result
K₂CO₃ = (2 × 39.0983) + (1 × 12.011) + (3 × 15.999)
Calculator
Elemental Composition of K2CO3
| Element | Symbol | Atoms | Atomic Mass | Contribution | Mass Percentage |
|---|---|---|---|---|---|
| Potassium | K | 2 | 39.0983 | 78.1966 g/mol | 56.5803% |
| Carbon | C | 1 | 12.011 | 12.0110 g/mol | 8.6907% |
| Oxygen | O | 3 | 15.999 | 47.9970 g/mol | 34.7289% |
| Total | — | 6 | — | 138.2046 g/mol | 100% |
Formula Used
The molar mass equals each atomic mass multiplied by its atom count.
M(K₂CO₃) = 2(39.0983) + 12.011 + 3(15.999) = 138.2046 g/mol
Moles equal mass divided by molar mass.
Formula units equal moles multiplied by Avogadro's constant.
How to Use This Calculator
Select the calculation mode that matches your known quantity.
Enter the value and choose its matching measurement unit.
Choose the preferred mass unit and decimal precision.
Press Calculate to refresh all displayed chemistry results.
Use Copy Result for quick reuse in your notes.
Download CSV to save the elemental composition table.
Choose Print or Save PDF for a printable report.
Example Conversion Table
| Moles K₂CO₃ | Mass (g) | Formula Units | Total Atoms |
|---|---|---|---|
| 0.10 | 13.8205 | 6.0221 × 10²² | 3.6133 × 10²³ |
| 0.25 | 34.5512 | 1.5055 × 10²³ | 9.0332 × 10²³ |
| 0.50 | 69.1023 | 3.0111 × 10²³ | 1.8066 × 10²⁴ |
| 1.00 | 138.2046 | 6.0221 × 10²³ | 3.6133 × 10²⁴ |
| 2.00 | 276.4092 | 1.2044 × 10²⁴ | 7.2266 × 10²⁴ |
| 5.00 | 691.0230 | 3.0111 × 10²⁴ | 1.8066 × 10²⁵ |
About the K2CO3 Molar Mass Calculator
Potassium carbonate has the chemical formula K₂CO₃. It contains potassium, carbon, and oxygen atoms. Molar mass describes the mass of one mole. Chemists usually express molar mass in grams per mole. This calculator determines that value from atomic masses. It also explains each element's contribution clearly. The formula contains two potassium atoms. It also contains one carbon atom. Three oxygen atoms complete each formula unit.
The calculator uses standard atomic mass values. Potassium contributes most of the compound's total mass. Carbon contributes a much smaller portion. Oxygen provides three separate atomic mass contributions. Adding every contribution gives about 138.2046 g/mol. Rounded values may differ between chemistry references. Those differences usually come from atomic mass rounding.
You can also convert moles into grams. Enter the number of moles first. The calculator multiplies moles by molar mass. Grams can also be converted into moles. That process divides mass by molar mass. Millimoles and micromoles are supported for smaller quantities. Mass results can appear in milligrams, grams, or kilograms.
Particle calculations use Avogadro's constant. One mole contains about 6.02214076 × 10²³ formula units. Each K₂CO₃ formula unit contains six total atoms. Therefore, one mole contains six times more individual atoms. The calculator can show potassium, carbon, oxygen, or all atoms. This helps with stoichiometry and particle counting exercises.
Percentage composition is useful for laboratory analysis. It shows each element's share of total mass. Potassium contributes roughly 56.58 percent by mass. Carbon contributes about 8.69 percent. Oxygen contributes about 34.73 percent. These values always total approximately one hundred percent.
This tool is useful for students and teachers. Laboratory users can check routine conversions quickly. It also supports homework and reaction calculations. The visible formula makes every result easier to verify. Decimal precision controls help match classroom requirements. Downloadable CSV data supports spreadsheets and lab records. Printing lets users create a simple PDF report.
Always confirm significant figures for graded scientific work. Use consistent units throughout every calculation. Check whether your course uses rounded atomic masses. Small rounding differences are normal in chemistry. Reliable calculations begin with correctly interpreted chemical formulas. K₂CO₃ calculations become faster with this organized calculator.
Frequently Asked Questions
1. What is the molar mass of K2CO3?
Using the listed atomic masses, K₂CO₃ is approximately 138.2046 g/mol.
2. How is K2CO3 molar mass calculated?
Multiply each atomic mass by its subscript, then add every contribution.
3. How many atoms are in one K2CO3 formula unit?
Each formula unit contains six atoms: two potassium, one carbon, and three oxygen.
4. How do I convert K2CO3 grams to moles?
Divide the mass in grams by approximately 138.2046 grams per mole.
5. How do I convert K2CO3 moles to grams?
Multiply the number of moles by approximately 138.2046 grams per mole.
6. Why can molar mass values differ slightly?
References may round atomic masses differently, causing small changes in final results.
7. Can this calculator estimate formula units?
Yes. It multiplies moles by Avogadro's constant to estimate formula units.