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A number that indicates how smoothly a gasoline burns.

Latest Articles

  • What are Compound Microscopes?

    Most of the microscopes used today are compound. A compound microscope features two or more lenses. A hollow cylinder called the tube connects the two lenses. The top lens, the one people look through, is called the eyepiece. The bottom lens is known as the objective lens. Below the two lenses is...

  • Protein Design: Automated protein discovery and synthesis

    In this paper I describe (theoretically) the method(s) of automated protein discovery and synthesis.

  • 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...

  • Why do copper products change color, and what is the name of the process?

    Probably, every person wants to know, why over time the copper turns green and becomes bloomed. This is easy to explain: that film is called patina.

  • Gas of rotten eggs

    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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Heat Capacity

The amount of heat required to raise the temperature of a body (of any mass) one degree Celsius.

Binary Acid

A binary compound in which H is bonded to one or more of the more electronegative nonmetals.

Supercritical Fluid

A substance at temperature above its critical temperature.

Crystal Lattice Energy

Amount of energy that holds a crystal together, the energy change when a mole of solid is formed from its constituent molecules or ions (for ionic compounds) in their gaseous state.

Secondary Standard

A solution that has been titrated against a primary standard. A standard solution is a secondary standard.

 

Homogeneous Mixture

A mixture which has uniform composition and properties throughout.

Oxidation

An algebraic increase in the oxidation number, may correspond to a loss of electrons.

Meniscus

The shape assumed by the surface of a liquid in a cylindrical container.

Absolute Zero

The zero point on the absolute temperature scale, -273.15°C or 0 K, theoretically, the temperature at which molecular motion ceases. The concept of an absolute zero temperature was first deduced from experiments with gases. When a fixed volume of gas is cooled, its pressure decreases with its temperature. Absolute zero physically possesses quantum mechanical zero-point energy.

Flammable

A liquid as defined by NFPD and DOT as having a flash point below 37.8°C (100°F).