What Is the Molar Mass of Hg?


Quick Answer

The molar mass of Hg is 200.592 grams per mole. The symbol Hg stands for the element mercury. Mercury exists in the elemental state; hence, its atomic weight and molar mass are the same.

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Full Answer

Mercury does not form a molecule like hydrogen or oxygen. In a molecule of hydrogen or oxygen, there are two atoms of hydrogen or oxygen, respectively. Hence, the atomic weight and molar mass of hydrogen are different. Similarly, the atomic weight and molar mass of oxygen are different. This is not the case with mercury.

The atomic number of mercury is 80. It is also called quicksilver and was formerly called “Hydrargyrum,” hence the symbol Hg. Mercury is the only metallic element that exists in liquid form at room temperature.

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