Find Formula/Molecule by Mass This page is meant to be a tool for mass spectrometry. The Avogadro's number is a dimensionless quantity and is equivalent to the Avogadro constant, which is 6.02 x 10^23 for one mole of a substance. Menu. Molecules are converted to moles and vice versa using the Avagadro's number. Formula: This web application calculates the molecular mass (average, monoisotopic, and nominal), the elemental composition, and the mass distribution spectrum of a molecule given by its chemical formula, relative element weights, or … Weights of atoms and isotopes are from NIST article. You can read more on the molar concentration and how to calculate the number of moles for a solution below the form. To dilute a solution of concentrated acid or base of known w/w% strength, please use the Acid & Base Molarity Calculator. 3D; 2D; Starting structure. It also displays molar mass of the chemical compound and details of its calculation just for reference. To dilute a solution of known molarity, please use the Solution Dilution Calculator. The mass molarity calculator tool calculates the mass of compound required to achieve a specific molar concentration and volume. This molarity calculator estimates the molar concentration of a solution by using the mass, volume and molecular weight. Methane; Benzene; Water dimer; Optimize; Atoms. Use uppercase for the first character in the element and lowercase for the second character. It is used in the calculator below to parse chemical compound formula and obtain molar mass. (1 u is equal to 1/12 the mass of one atom of carbon-12) Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol. Also provides the atomic number, element name, base atomic weight and formula weight for the calcutated molecular formula. Examples: Fe, Au, Co, Br, C, O, N, F. Input the molecular formula and the weight is calculated. It will calculate the total mass along with the elemental composition and mass of each element in the compound. Calculate the molecular weight of a formula. by Christoph Gohlke. Give us feedback about your experience with Molecular Weight Calculator. Here is a simple online molecules to moles calculator to convert molecules into moles. Molecular Mass Calculator. Definitions of molecular mass, molecular weight, molar mass and molar weight: Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). This program determines the molecular mass of a substance. As 1.626×10 23 molecules of NaOH is also equal to 0.27 moles, and we know that the molecular weight of NaOH is 40, we can use these numbers to get: mass = 40 / 0.27 = 10.8 g The calculator below calculates mass of the substance in grams or quantity of the substance in moles depending on user's input. The monoisotopic masses for nearly 11 000 biologically relevant organic molecules have been calculated and inserted into a database to be searched against. mole = molecular weight / mass (mulitply both sides by mass) mole * mass = molecular weight (divide both sides by mole) mass = molecular weight / mole. New in Dynochem 5.2, Molar Mass calculator opens a task pane in which you can: calculate the Molar Mass (Molecular Weight, Relative Molecular Weight) for any given molecule; format the formula to the Hill order; determine the mass percent composition. To calculate molar mass of a chemical compound, please enter its chemical formula and click 'Calculate'. Low mass resolution outputs results in unit mass resolution High resolution reports data in x.xxxx digit resolution, which prints out M+1 isotopes separately The program calculates the exact molecular formula and molecular weights and the isotopic distributions of the molecules. Enter the molecular formula of the substance.