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# Calculating Molar Mass

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Sections
The Atom
Subatomic Particles
Isotopes
Ions
Atomic Mass
Periodic Table: Classifications
Periodic Table: Group Names
Periodic Table: Representative Elements & Transition Metals
Periodic Table: Element Symbols
Periodic Table: Elemental Forms
Periodic Table: Phases
Periodic Table: Charges
Calculating Molar Mass
Mole Concept
Law of Conservation of Mass
Law of Definite Proportions
Atomic Theory
Law of Multiple Proportions
Millikan Oil Drop Experiment
Rutherford Gold Foil Experiment

Molar Mass is a physical property that represents the mass of a substance divided by the amount of that substance.

###### Calculating Molar Mass

Concept #1: Calculating Molar Mass

The units for molar mass are in grams per mole.

Example #1: Calculate the molar mass of the compound (NH4)2SO4.

Practice: Calculate the molecular weight of C3H5N3O3.

Practice: The reaction between nickel metal and hydrochloric acid is not a simple dissolution. The product formed is NiCl2 • 6 H2O (s), nickel (II) chloride hexahydrate, which has exactly 6 waters of hydration in the crystal lattice for every nickel ion. What is the molar mass of nickel (II) chloride hexahydrate, NiCl2 • 6 H2O (s)?

Practice: What is the molar mass of diazepam also known as Valium if 0.05570 mol weighs 15.86 g?