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Question
Find the formula unit mass of magnesium hydroxide, $$\mathrm{Mg}(\mathrm{OH})_{2}.$$
Atomic mass - $$\mathrm{Mg}=24 \mathrm{u} ; \mathrm{O}=16 \mathrm{u} ; \mathrm{H}=1 \mathrm{u}$$.
Numerical
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Solution
Formula unit mass of Mg(OH)2
= 24 u + 2[(16 u) + (1 u)]
= 58 u.
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