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AQA Education, [1] trading as AQA (formerly the Assessment and Qualifications Alliance), is an awarding body in England, Wales and Northern Ireland. It compiles specifications and holds examinations in various subjects at GCSE, AS and A Level and offers vocational qualifications. AQA is a registered charity and independent of the government.
The following is a list of GCE Ordinary Level subjects offered by Cambridge International Examinations (CAIE).You can choose from more than 40 subjects in any combination. [ 1 ] Cambridge O Levels, Cambridge IGCSE and/or Cambridge International Level 1 or Level 2 Certificates may be taken in the same examination session but certain combinations ...
The A-level (Advanced Level) is a subject-based qualification conferred as part of the General Certificate of Education, as well as a school leaving qualification offered by the educational bodies in the United Kingdom and the educational authorities of British Crown dependencies to students completing secondary or pre-university education. [1]
After eleven paper editions over 68 years, Reagent Chemicals became an electronic resource in 2017. [5] The publication is updated several times a year to include new reagents and methods of analysis. Changes are published online six months prior to becoming an official standard, allowing manufacturers to adjust their labels or processes. [6]
Diammonium phosphate (DAP; IUPAC name diammonium hydrogen phosphate; chemical formula (NH 4) 2 (HPO 4)) is one of a series of water-soluble ammonium phosphate salts that can be produced when ammonia reacts with phosphoric acid. Solid diammonium phosphate shows a dissociation pressure of ammonia as given by the following expression and equation: [2]
The S-level or scholarship level was a General Certificate of Education (GCE) public examination in England, Wales and Northern Ireland, taken by the most able A-level students. The 'S' level was typically used to support university entrance applications, though in practice it was directed almost exclusively to Oxbridge applications. Results ...
This is a list of important publications in chemistry, organized by field. [1] [2] [3] [4]Some factors that correlate with publication notability include: Topic creator – A publication that created a new topic.
[1] [2] Some of the commonly used grades of purity include: ACS grade is the highest level of purity, and meets the standards set by the American Chemical Society (ACS). The official descriptions of the ACS levels of purity is documented in the Reagent Chemicals publication, issued by the ACS. [3] [4] It is suitable for food and laboratory uses.