What Is the Molar Mass of Mg(OH)2?


Quick Answer

The molar mass of Mg(OH)2 is equal to about 58.31 grams per mole. That mass comes from the mass of each atom contained in a single molecule of Mg(OH)2, with 41.67 percent coming from magnesium, 3.45 coming from hydrogen and 54.86 percent coming from oxygen.

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Full Answer

The atomic mass of each element in Mg(OH)2 can be found on the periodic table. The atomic mass is for a single atom, so it must be multiplied by the number of atoms in the compound to determine the mass of each element. For example, the mass of a hydrogen is equal to about 1, which is then multiplied by 2 to find that there are 2 grams per mole of hydrogen in one molecule of Mg(OH)2.

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