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Change in the concentration of a reactant or product per unit time.

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  • Varieties of garnet minerals

    The most famous type of garnet stone is pyrope (flaming). This is the "oldest of garnets", with a dense red color, similar to the grain of an edible garnet. Pyrope has a variety called rhodolite - a stone of dense pink or pink-purple color, which sometimes has the alexandrite effect and is used in...

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    If you happen to break a rotten egg, then you know the smell of hydrogen sulfide, because the stench of the spoiled egg depends on of its presence in rotting protein substances.

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    We breathe 24 hours a day, 7 days a week, consuming about 25 kg of air every day. It turns out that we practically predetermine our health by the air we breathe.

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    One of the most interesting and obvious chemical experiments is the experiment on the interaction of copper sulfate and calcium carbonate. The latter is contained in the shell of a simple egg, but copper sulphate should be searched in a chemical reagent store. This experience is simple, but...

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    It's getting close to New Years and many people are starting to think about how to lose those extra pounds they managed to gain over the holidays. There are many sorts of diets and fads that have developed over the years from cutting carbs to cutting protein. Everyone has their own opinion as to...



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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.

Surface Tension

It is the force in dynes acting along the surface of the liquid 1cm in length and perpendicular to it.

Quantum Mechanics

Mathematical method of treating particles on the basis of quantum theory, which assumes that energy (of small particles) is not infinitely divisible.

Composition Stoichiometry

Descibes the quantitative (mass) relationships among elements in compounds.

Liquid Aerosol

Colloidal suspension of liquid in gas.

Active Metal

Metal with low ionization energy that loses electrons readily to form cations.

Double Bond

Covalent bond resulting from the sharing of four electrons (two pairs) between two atoms.

Solvolysis

The reaction of a substance with the solvent in which it is dissolved.

Lewis Base

Any species that can make available a share in an electron pair.

Periodic Law

The properties of the elements are periodic functions of their atomic numbers.