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For example, the molar mass of atomic Hydrogen is 1 g/mol, molecular

hydrogen 2 g/mol, of sulfuric acid is 98 g/mol. While solving sums it is convenient

to use the following formula:

=

where m - mass of matter, g;

M is the molar mass, g / mol;

=

where N - is the number of structural units;

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N A, the Avogadro constant, N A = 6,02• 10 mol .

The chemical equivalent is the weight of a substance that is combined with the

Hydrogen atom mole or replaces the same amount of Hydrogen atoms in the
compounds

In accordance with the law of constancy the composition elements are

combined with each other in strictly defined weight ratios. The smallest weights

are called chemical equivalents (connecting masses), which means - an equivalent

amount.

Chemical elements are interconnected, and the substances interact with each
other in weight proportions proportional to their equivalent masses

1.2 Basic chemistry laws of conservation of mass law

The mass of one equivalent of the substance is called the equivalent mass

(the molar mass of the equivalent E), whose unit of measurement is - g/mol-eq.

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