Example Data Table
| Case |
Formula |
Sample Mass |
Purity |
Molar Mass |
Approx Moles |
| Dry salt |
(NH4)2CO3 |
25 g |
100% |
96.0858 g/mol |
0.2602 mol |
| Impure dry salt |
(NH4)2CO3 |
10 g |
95% |
96.0858 g/mol |
0.0989 mol |
| Monohydrate |
(NH4)2CO3 · H2O |
15 g |
100% |
114.1011 g/mol |
0.1315 mol |
Formula Used
Ammonium carbonate has the formula (NH4)2CO3.
Molar mass = 2 × N + 8 × H + 1 × C + 3 × O.
For hydrates, add x × (2 × H + O).
Pure mass = sample mass × purity ÷ 100.
Moles = pure mass ÷ molar mass.
Formula units = moles × 6.02214076 × 1023.
Mass percentage = element mass contribution ÷ total molar mass × 100.
How to Use This Calculator
Enter the atomic masses you want to use.
Keep the default values for normal classroom work.
Add your sample mass in grams.
Enter purity when the material is not fully pure.
Use hydrate water value only for hydrated material.
Set target moles to find the required sample mass.
Press Calculate to view the result above the form.
Use CSV or PDF download for records.
About Ammonium Carbonate Molar Mass
Ammonium carbonate is a salt made from ammonium ions and carbonate ions. Its common formula is (NH4)2CO3. The formula shows two nitrogen atoms, eight hydrogen atoms, one carbon atom, and three oxygen atoms. These atom counts are the base of every molar mass calculation.
Why Molar Mass Matters
Molar mass connects grams with moles. This link is important in chemistry labs. It helps prepare solutions. It also helps compare reactants. A balanced equation gives mole ratios. The molar mass then changes those ratios into practical weighed amounts.
Advanced Input Control
This calculator lets you adjust atomic masses. That is useful when a teacher, lab sheet, or standard table uses slightly different values. Small changes can matter in careful work. The tool also includes purity. A lower purity reduces the usable chemical mass. The hydrate field adds water of crystallization when needed.
Percent Composition
Percent composition shows how much each element contributes to the total molar mass. It is useful for checking formulas. It also supports analytical chemistry. For ammonium carbonate, oxygen gives a large share. Nitrogen and hydrogen also contribute strongly because ammonium appears twice.
Sample and Target Planning
The sample section estimates moles from a weighed amount. The target moles section works in reverse. It finds the mass needed to reach a chosen mole amount. This is useful before preparing a reaction, standard, or classroom demonstration.
Using the Results
Start with default atomic masses for routine work. Change them only when your source requires it. Check the formula line before using the answer. Review purity and hydrate entries carefully. Export the result when you need a record. The CSV file is useful for spreadsheets. The PDF file is useful for reports and lab notebooks.
FAQs
What is the molar mass of ammonium carbonate?
Using common atomic masses, dry ammonium carbonate has a molar mass near 96.0858 g/mol. Your result may change slightly if different atomic masses are entered.
What is the formula of ammonium carbonate?
The formula is (NH4)2CO3. It contains two nitrogen atoms, eight hydrogen atoms, one carbon atom, and three oxygen atoms.
Why does purity change the mole result?
Purity changes the usable mass. A 90% pure sample has only 90% active ammonium carbonate. The calculator uses pure mass for mole conversion.
Should I enter hydrate water?
Enter hydrate water only when your material is written with water, such as a hydrate. For dry ammonium carbonate, keep this value at zero.
How are percent composition values found?
Each element mass contribution is divided by the total molar mass. The result is multiplied by 100 to show percent by mass.
Can I change atomic weights?
Yes. You can edit hydrogen, nitrogen, carbon, and oxygen atomic masses. This helps match your textbook, lab sheet, or required reference table.
What does formula units mean?
Formula units are the counted particles of an ionic compound. The calculator multiplies moles by Avogadro’s number to estimate them.
Can I export the calculation?
Yes. Use the CSV button for spreadsheet records. Use the PDF button after calculation for a simple printable report.