Define formula unit mass .Calculate the formula unit mass of NaCl, (Atomic mass of Na=23 u, Cl=35.5u )
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The formula mass of a substance is the sum of the average atomic masses of each atom represented in the chemical formula and is expressed in atomic mass units. The formula mass of a covalent compound is also called the molecular mass.The mass in grams of 1 mole of substance is its molar mass.Formula unit mass of NaCl = Atomic mass of Na + atomic mass of Cl
=23u+35.5u=58.5u
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formula unit mass is equals to sum of the atomic mass of element and atomic number of element present in it is called formula unit mass
Explanation:
formula unit mass of NaCl =
atomic mass of NA+atomic number ofCl
23+35.5
58.5u
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