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What is molecule mass?

  1. Molecular mass
  2. Molecular massormolecular weightrefers to themassof amolecule. It is calculated as the sum of themassof each constituent atom multiplied by the number of atoms of that element in themolecularformula. Themolecular massof small to medium sizemolecules, measured bymassspectrometry, determines stoichiometry.
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The total mass of the molecule is calculated by multiplying the number of same atoms and adding the mass of different atoms.Let us try for finding the mass of water molecule.
H2O---) 2 (H)+1(O)
=2(1)+1 (16)
=2+16
=18
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