CHEMISTRY GLOSSARY

bar    →   bar

Bar (bar) is a unit of pressure equal to 10⁵ Pa. Its use is temporarily maintained with the SI. The milibar (100 Pa) is commonly used in meteorology.

barrel    →   barel

Barrel (US, petrol) is an American unit of capacity usually employed in the petroleum industry and trading in fuels (barell = 158.987 294 9 L).

becquerel    →   bekerel

Becquerel (Bq) is the SI derived unit, with a special name, for radioactivity, equal to s^-1. It describes a radioactivity of an amount of radionuclide decaying at the rate, on average, of one spontaneous nuclear transition per second. The unit was named after the French scientist Antoine Henri Becquerel (1852-1908) (disintegrations per unit time), equal to s^-1.

amount concentration    →   količinska koncentracija

Amount concentration (also called molar concentration and in older literature molarity) is the amount of a given substance in a stated unit of a mixture, solution, or ore. The common unit is mole per cubic decimetre (moldm⁻³) or mole per litre (molL^-1) sometimes denoted by M.

The concentration of an atom, ion, or molecule in a solution may be symbolised by the use of square brackets, as [Ca²⁺].

ampere    →   amper

Ampere (A) is the SI base unit of electric current.

The ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed 1 metre apart in vacuum, would produce between these conductors a force equal to 2×10^-7 newton per metre of length.

angular acceleration    →   kutna akceleracija

If the angular velocity of a body changes from an initial value ω_i to a final value ω_f, average angular acceleration, α, can be defined for the time interval Δt = t_f - t_i:

The instantaneous angular acceleration, α, is the limit of the average angular acceleration, as Δt is made to approach zero:

SI unit for angular acceleration is s^-2.

binary    →   binaran

Binary, describing a compound or alloy formed from two elements

buffer capacity    →   puferski kapacitet

Buffer capacity is number of moles of a strong acid or a strong base needed to change pH of 1 dm³ of buffer solution for pH unit.

Celsius    →   Celzijev stupanj

Celsius (°C) is a common but non-SI unit of temperature, defined by assigning temperatures of 0 °C and 100 °C to the freezing and boiling points of water, respectively.

conversion factor    →   konverzijski faktor

Conversion factor is a fraction that relates one unit to another. Multiplying a measurement by a conversion factor changes the units of the measurement, for example