Molecular mass beTween tWo CoMpoUnds???

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Molecular mass beTween tWo CoMpoUnds???

The molar mass is the mass of a given chemical element or chemical compound (g) divided by the amount of substance (mol).

The molar mass of a compound can be calculated by adding the standard atomic masses (in g/mol) of the constituent atoms.

Molar mass serves as a bridge between the mass of material and the number of moles since it is not possible to measure the number of moles directly.

Measuring Mass in Chemistry

Chemists can measure a quantity of matter using mass, but in chemical reactions, it is often important to consider the number of atoms of each element present in each sample. Even the smallest quantity of a substance will contain billions of atoms, so chemists generally use the mole as the unit for the amount of substance.

One mole (abbreviated mol) is equal to the number of atoms in 12 grams of carbon-12; this number is referred to as Avogadro’s number and has been measured as approximately 6.022 x 10^23. In other words, a mole is the amount of substance that contains as many entities (atoms, or other particles) as there are atoms in 12 grams of pure carbon-12.

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