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The atomic mass is usually found on the periodic table and is given in atomic mass units (amu). Find atomic masses: look up the atomic masses of each element present in the compound. Sodium chloride, also known as salt, common salt, table salt or halite, is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions.For example, water is H 2O, meaning it contains two hydrogen atoms and one oxygen atom. A quick look in the periodic table and youll see that the molar masses of sodium and chlorine, respectively are: N a 2 2. Identify the compound: write down the chemical formula of the compound.One mole contains exactly 6.022 ×10 23 particles (Avogadro's number) Mole is a standard scientific unit for measuring large quantities of very small entities such as atoms and molecules.This formula mass is the sum of the atomic masses of one sodium atom and one chlorine atom, which we find from the periodic table here, we use the masses to two decimal places: Na: 22.99 amu.
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Converting the mass, in grams, of a substance to moles requires a conversion factor of (one mole of substance/molar mass of. Let us start by calculating the formula mass of sodium chloride (NaCl). Step 2: Calculate molar mass of the substance: The molar mass of NaCl Mass of Na + Mass of Cl. Chlorine (Cl) has an atomic mass of approximately 35.45 g/mol. If the mass of a substance is known, the number of moles in the substance can be calculated. Definitions Molecular mass ( molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). Step 1: Determine the mass of sodium chloride (NaCl): As per the periodic table, the atomic mass of Sodium (Na) is approximately 22.99 g/mol. Molar mass ( molar weight) is the mass of one mole of a substance and is expressed in g/mol. The molar mass of an element is found on the periodic table, and it is the elements atomic weight in grams/mole (g/mol).(1 u is equal to 1/12 the mass of one atom of carbon-12) Molecular mass ( molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u).To calculate molecular weight of a chemical compound enter it's formula, specify its isotope mass number after each element in square brackets.Įxamples of molecular weight computations: Multiply the number of atoms by the atomic weight of each element found in steps 1 and 2 to get the mass of each element in 3NaCl: Molar Mass (g/mol) Na (Sodium) 3 × 22.98976928 68.96930784. Molar mass calculator also displays common compound name, Hill formula, elemental composition, mass percent composition, atomic percent compositions and allows to convert from weight to number of moles and vice versa.Ĭomputing molecular weight (molecular mass) Functional groups: D, Ph, Me, Et, Bu, AcAc, For, Tos, Bz, TMS, tBu, Bzl, Bn, DmgĮxamples of molar mass computations: NaCl, Ca(OH)2, K4, CuSO4*5H2O, nitric acid, potassium permanganate, ethanol, fructose, caffeine, water.Capitalize the first letter in chemical symbol and use lower case for the remaining letters: Ca, Fe, Mg, Mn, S, O, H, C, N, Na, K, Cl, Al.
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).Computing molar mass (molar weight)To calculate molar mass of a chemical compound enter its formula and click 'Compute'.