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Calculations. MEP surface lucent/opaque: calculates and projects molecular electrostatic potential on a translucent or opaque van der Waals surface. Charge: calculates and projects atomic charge as text label and white to atom color gradient. Bond dipoles: calculates and draws individual bond dipoles.
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29 lip 2021 · The molar mass of any substance is its atomic mass, molecular mass, or formula mass in grams per mole. The periodic table lists the atomic mass of carbon as 12.011 amu; the average molar mass of carbon—the mass of 6.022 × 10 23 carbon atoms—is therefore 12.011 g/mol:
Calculate formula masses for covalent and ionic compounds. Define the amount unit mole and the related quantity Avogadro’s number. Explain the relation between mass, moles, and numbers of atoms or molecules, and perform calculations deriving these quantities from one another.
The molar mass of any substance is numerically equivalent to its atomic or formula weight in amu. Per the amu definition, a single 12 C atom weighs 12 amu (its atomic mass is 12 amu). A mole of 12 C weighs 12 g (its molar mass is 12 g/mol).
This section focuses on how to determine the empirical formula of a compound and then use it to determine the molecular formula if the molar mass of the compound is known. Formula and Molecular Weights. The formula weight of a substance is the sum of the atomic weights of each atom in its chemical formula.
In chemistry, the molar mass (M) (sometimes called molecular weight or formula weight, but see related quantities for usage) of a chemical compound is defined as the ratio between the mass and the amount of substance (measured in moles) of any sample of the compound. [1]
The units of molar mass follow its definition; grams per mole. Mathematically, the defining equation of molar mass is. Molar mass = mass/mole = g/mol. The definition of atomic mass, the mole, and molar mass are all directly or indirectly related to carbon-12. This leads to two important facts.
