The Mole and Avogadro's Number (3.2.1) Flashcards
• The mole is a unit of measure that connects the atomic-molecular world with the macroscopic world.
• The mole is a unit of measure that connects the atomic-molecular world with the macroscopic world.
• Avogadro’s number helps to connect the periodic table with things that can be physically measured.
• Avogadro’s number helps to connect the periodic table with things that can be physically measured.
Atoms and most molecules are far too tiny to
measure individually. The mole (abbreviated mol) is
the collective unit used to measure atoms, ions,
and molecules in chemical reactions.
The mole is useful because it depends only on the
number of particles and not the mass or the size of
the particles being measured.
A mole is that amount of substance that contains as
many elementary entities (atoms, ions, or
molecules) as there are atoms present in exactly
12 grams of carbon-12 (12C).
12C was chosen as the standard partly because it is
the first element in the periodic table whose mass
may be conveniently measured.
Atoms and most molecules are far too tiny to
measure individually. The mole (abbreviated mol) is
the collective unit used to measure atoms, ions,
and molecules in chemical reactions.
The mole is useful because it depends only on the
number of particles and not the mass or the size of
the particles being measured.
A mole is that amount of substance that contains as
many elementary entities (atoms, ions, or
molecules) as there are atoms present in exactly
12 grams of carbon-12 (12C).
12C was chosen as the standard partly because it is
the first element in the periodic table whose mass
may be conveniently measured.
Avogadro’s number, 6.022 x 1023, represents the
number of units in a mole.
Conversion factors are factors of one relating the
same quantity between two systems of units. They
are used to convert measurements from one set of
units to another. Thus, one mole of fluorine atoms is
the same as 6.022 x 1023 atoms of fluorine.
Avogadro’s number, 6.022 x 10^23, represents the
number of units in a mole.
Conversion factors are factors of one relating the
same quantity between two systems of units. They
are used to convert measurements from one set of
units to another. Thus, one mole of fluorine atoms is
the same as 6.022 x 1023 atoms of fluorine.
