![]() ![]() a graduate in good standing from a U.S.board certified in addiction medicine or addiction psychiatry by the American Board of Medical Specialties, the American Board of Addiction Medicine or the American Osteopathic Association. ![]() You are considered to have already satisfied this requirement if you are: For example, when ammonium dichromate is heated, it decomposes, forming the substances chromium oxide (III) nitrogen and water.This requirement is for DEA-registered practitioners who are renewing their license or any first-time registrants (except for practitioners who are solely veterinarians). Generally, It is easier to convert a compound into other compounds by chemical reaction than to separate a compound into its constituent elements. It is more difficult to carry out the decomposition of a compound in its constituent elements than the mere physical separation of the mixtures.įor example, the extraction of Iron from iron oxide ores requires a blast furnace or the production of Magnesium from Magnesium chloride on an industrial scale requires electricity. Ordinary air is a homogeneous mixture of several gases, mainly with elements such as nitrogen and oxygen.īioprofe | Sustancias puras y mezclas | 12Ĭromatography is achieved due to the use of two phases: a mobile phase, which is a solution that is composed of different elements and a stationary phase characterized by being a solid material that remains unchanged after the completion of the technique.ĭepending on the nature of the mobile phase and the stationary phase, different types of chromatography can be distinguished: solid-liquid liquid-liquid liquid-gas etc.Ī chemical compound maintains its identity during physical transformations but can be decomposed into its constituent elements through chemical transformations. A certain aqueous solution of sucrose has a uniform sweetness in any part of the solution, but the sweetness of another sucrose solution can be very different if the proportions of sugar and water are different.
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