Molecular Weight Calculator
Calculate molar mass and composition from chemical formula
How to use Molecular Weight Calculator
- 1Enter a chemical formula such as H2O or C6H12O6.
- 2Lets the tool sum up the atom mass of each element.
- 3View the moor mass in gramore.
Atoms by mass
Mol mass = thorium (number of atoms x mass of an element)Molecular mass (mol mass) is the sum of all atom mass in the chemical formula, using the standard atomic mass in the periodic table of elements.
It connects micro (atoms) to macro (grams) worlds, so you can name the substances known to be moles.
Mole mass is the sum of the elements** relative to the atom mass** weighted by the number of atoms in the chemical formula. Common atoms: H 1.008, C 12.011, N 14.007, O 15.999, Na 22.990, S 32.06, Cl 35.45, Ca 40.078. Take glucose C6H12O6 for example: 6 x 12.011 + 12 x 1.008 + 6 x 15.999 = 180.16 g/mol. Note the brackets and crystals: CuSO4 5H2O to count 5 water molecules.
The actual use of molar quality is** between mass and volume of substances**: n (mol) = m (g) ÷ M (g/mol). This is the central hub of chemical calculations - the solution, the output, and the formula. m = n x M: NaCl for 0.5 mol to be called 0.5 x 58.44 = 29.22 g. ** All the "how many grams" in the lab came out of Moor quality. **
| Compounds | Chemical | Mor mass g/mol | Common uses |
|---|---|---|---|
| Water | H₂O | 18.015 | Solvent, general |
| Carbon dioxide | CO₂ | 44.01 | Greenhouse gases, fire suppression |
| Sodium chloride | NaCl | 58.44 | Salt. |
| Glucose. | C₆H₁₂O₆ | 180.16 | Bioenergy |
| ethanol | C₂H₅OH | 46.07 | Sterilization, fuel |
| Sulphuric acid | H₂SO₄ | 98.08 | Industrial base materials |
| Sodium hydroxide | NaOH | 40.00 | Boiling. |
| Calcium carbonate | CaCO₃ | 100.09 | limestone, calcifier |
| Sugar | C₁₂H₂₂O₁₁ | 342.30 | Sugar. |
| Stop! | NH₃ | 17.03 | Fertilizers, refrigerants |
Mor mass of common compounds
Frequently asked questions
What's the difference between "quality" and "weight" here?
The two terms are often used in practice, but the quality is strictly physical.
Why is water equal to 18?
H around 1, O about 16, so H2O = 2 x 1 + 16 = 18 g/mol.
Can crystal hydrates count?
Yes, it is written in a chemical form, such as CuSO4 5H2O.
What difference does it make between molar mass and molecular weight?
The values are the same, in different units. Molecular mass (relative molecular mass) is the value of the no schematic scale (1/12 relative to carbon-12), molar mass band in g/mol. The numeric mass (g) of 1 mol of any substance coincides with its relative molecular mass, which is the result of the definition of the Avogardro constant (6.022 x 1023). Words are often mixed and official writing is distinguished.
Why is it sometimes called "equivalent"?
Because the chemical reaction is done in proportion to ** the number of particles**, not in terms of mass. 1 mol H2SO4 provides 2 mol H+, so its "equivalent mass" is 98.08 ÷ 2 = 49.04 g/eq. In alkaline drop-down, oxidation responses, the response capacity of different substances can be directly compared in equivalents. Molar formulas are more recommended in modernity, but the concept of equivalents is still in use in areas such as electrochemicals, water quality hardness (mg/L CaCO3 equivalent).
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