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The energy change accompanying the hydration of a mole of gase and ions.

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Standard Molar Volume

The volume occupied by one mole of an ideal gas under standard conditions, 22.4liters.

Conformations

Structures of a compound that differ by the extent of rotation about a single bond.

Periodic Table

An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.

Octane Number

A number that indicates how smoothly a gasoline burns.

How to keep flowers in a vase for long time

The best gift for a woman, as you know, is a beautiful bouquet of flowers. But the cut flowers at home quite quickly wither. But your favorite roses or tulips can keep their freshness if you use our advice. Chemistry and various chemical elements will help us in this difficult matter!

xanthene dye

Any of a group of dyes having a molecular structure related to that of xanthene in which the aromatic (C6H4) groups are the chromophore.

 

Half-Life

The time required for half of a reactant to be converted into product(s). The time required for half of a given sample to undergo radioactive decay.

Eluant or eluent

The solvent used in the process of elution, as in liquid chromatography.

 

Common Ion Effect

Suppression of ionization of a weak electrolyte by the presence in the same solution of a strong electrolyte containing one of the same ions as the weak electrolyte.

Mass Number

The sum of the numbers of protons and neutrons in an atom, an integer.