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Calculate the molecular mass of Ca(OH)2

Atomic mass of :

       (1) Ca = 40.0 u
       (2) O = 16.0 u
       (3) H = 1.0 u

So molecular mass of Ca(OH)2 is = 40 + 2(16) + 2(1) = 74.0u

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molecular mass of calcium hydroxide = the atomic weights from the individual elements in a periodic table. then count the number of atoms and multiply it by the individual atomic masses.

=74.093g\mol
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