Transcription of Calculations and Chemical Equations Example: Practice
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Calculations and Chemical Equations Example: Practice
1 Calculations and Chemical EquationsAtomic mass: Mass of an atom of an element, expressed in atomic mass units Atomic mass unit (amu): x 10-24gAtomic weight:Average mass of all isotopes of a given element; listed on the periodic tableExample:Hydrogen atomic weight = amuCarbon atomic weight = amuCarbon atoms are 12 times as massive as hydrogen atomsPractice:Ca atomic mass = amuNe atomic mass = amuHow many Neon atoms are required to give the same mass as one calcium atom?Avogadro s Number: The Mole1 Dozen = 121 Gross = 1441 Mole = x 10231 mole of atoms = x 1023 atoms1 mole of molecules = x 1023 moleculesMolar Mass: the mass (in grams) of one mole a particular substanceThere is a unique relationship between molar mass and atomic weight:Oxygen s atomic weight is amu.
1 Calculations and Chemical Equations Atomic mass: Mass of an atom of an element, expressed in atomic mass units Atomic mass unit (amu): 1.661 x 10-24g Atomic weight: Average mass of all isotopes of a given element; listed on the periodic table
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