Page 10 - 6273

E salt =

where n - is the number of metal atoms; V - metal valence.

To determine the number of equivalents (n eq) of a substance having a specific

mass m, use the formula:

=

It is established that one mole of any gas under the same conditions takes a certain

amount because according to Avogadro's law equal volumes of gases under

identical conditions contain the same number of molecules.

Under normal conditions (n.c.):

 pressure 1 atm= 760 millimeters of mercury column = 101325Pa,

 temperature 0°С = 273 К
3
The volume of 1 mole of any gas is 22,4 dm .
3
The steel V m = 22.4 dm /mole is called the molar volume of gas under normal

conditions.

1.2 Relative atomic and molecular masses. Mole. Molar mass.

Molar (molar) volume (Vm) is the volume that holds 1 mole of any gas
3
under normal conditions and equals 22.4 dm

In all conditions, the molar volume of gas is a quantity equal to the ratio of

gas volume under given conditions to the amount of substance of this gas:

Vm=

3
where V m - molar volume of gas under given (any) conditions, dm /mol;
3
V - volume of gas under given (any) conditions, dm ;

ν - amount of gas substance, mole.

10