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  2. List of unsolved problems in chemistry - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Download as PDF; Printable version ... This article needs attention from an expert in chemistry. ... "First 25 of 125 big questions that face scientific inquiry over ...

  3. Cahn–Ingold–Prelog priority rules - Wikipedia

    en.wikipedia.org/wiki/Cahn–Ingold–Prelog...

    The spiro carbon, C, is a stereogenic centre, and priority can be assigned a>a′>b>b′, in which one ring (both give the same answer) contains atoms a and b adjacent to the spiro carbon, and the other contains a′ and b′. The configuration at C may then be assigned as for any other stereocentre.

  4. Nitrate test - Wikipedia

    en.wikipedia.org/wiki/Nitrate_test

    The ammonia formed may be detected by its characteristic odor, and by damp red litmus paper's turning blue, signalling that it is an alkali — very few gases other than ammonia evolved from wet chemistry are alkaline. 3 NO − 3 + 8 Al + 5 OH − + 18 H 2 O → 3 NH 3 + 8 [Al(OH) 4] −. Aluminium is the reducing agent in this reaction that ...

  5. Aqueous solution - Wikipedia

    en.wikipedia.org/wiki/Aqueous_solution

    The word aqueous (which comes from aqua) means pertaining to, related to, similar to, or dissolved in, water. [1] [2] As water is an excellent solvent and is also naturally abundant, it is a ubiquitous solvent in chemistry. Since water is frequently used as the solvent in experiments, the word solution refers to an aqueous solution, unless the ...

  6. Chemistry - Wikipedia

    en.wikipedia.org/wiki/Chemistry

    Chemistry is the scientific study of the properties and behavior of matter. [1] It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.

  7. Donnie Wahlberg Says Goodbye to 'Blue Bloods' and Reveals ...

    www.aol.com/donnie-wahlberg-says-goodbye-blue...

    Among the problems that he sees for a spinoff is the fact that the family is so close and tight-knit that it’s almost impossible to do a show without the whole family showing up.

  8. 6 Clever Tricks for Making Holiday Trips Easier With Food ...

    www.aol.com/6-clever-tricks-making-holiday...

    5- Allergy Placemats. If you have kids making sure no one gives them food they cannot have due to food allergens. Watching over them is a full time job at gatherings and parties with food.

  9. List of chemistry mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_chemistry_mnemonics

    A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.