define molecular mass on C-12 scale
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A mole is defined as the number of carbonatoms in 12 grams of the isotope carbon-12, which is roughly 6.022 x 10*23 atoms. This number is called Avogadro's number or Avogadro's constant. It is used as the number of atoms for any substance, and the mass of 1 mole of a substance is itsmolar mass
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Molecular mass definition is - the mass of a molecule that is equal to the sum of the masses of all the atoms contained in the molecule.
The molecular masses of hydrogen, nitrogen, and oxygen are 2, 42, and 32, respectively.
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