Here are the essential concepts you must grasp in order to answer the question correctly.
Molar Mass
Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all the atoms in a molecule or formula unit. For example, the molar mass of mercury (Hg) is approximately 200.59 g/mol, which indicates that one mole of mercury weighs about 200.59 grams.
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Avogadro's Number
Avogadro's number, approximately 6.022 x 10²³, is the number of atoms, molecules, or particles in one mole of a substance. This constant allows chemists to convert between the number of particles and the amount of substance in moles. Understanding this concept is essential for relating the mass of a substance to the number of moles present.
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Elemental Composition
Elemental composition refers to the types and amounts of elements that make up a substance. In the case of mercury (Hg), it is a pure element consisting solely of mercury atoms. Knowing the elemental composition is crucial for determining the molar mass and understanding the properties of the substance in chemical reactions.
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