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  2. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    Relation to SI units ångström: Å ≡ 1 × 1010 m: ≡ 0.1 nm astronomical unit: au ≡ 149 597 870 700 m ≈ Distance from Earth to Sun ≡ 149 597 870 700 m [1] attometre: am ≡ 1 × 10 −18 m: ≡ 1 × 10 −18 m: barleycorn (H) = 1 ⁄ 3 in (see note above about rounding) = 8.4 6 × 10 −3 m bohr, atomic unit of length: a 0 = Bohr ...

  3. Template:SI base quantities/table - Wikipedia

    en.wikipedia.org/wiki/Template:SI_base...

    Download QR code; Print/export Download as PDF; Printable version; In other projects Appearance. ... SI base quantities/table}} – the table in this template ...

  4. Silicon dioxide - Wikipedia

    en.wikipedia.org/wiki/Silicon_dioxide

    In dimeric silicon dioxide there are two oxygen atoms bridging between the silicon atoms with an Si–O–Si angle of 94° and bond length of 164.6 pm and the terminal Si–O bond length is 150.2 pm. The Si–O bond length is 148.3 pm, which compares with the length of 161 pm in α-quartz. The bond energy is estimated at 621.7 kJ/mol. [21]

  5. Conversion of units - Wikipedia

    en.wikipedia.org/wiki/Conversion_of_units

    For example, the freezing point of water is 0 °C and 32 °F, and a 5 °C change is the same as a 9 °F change. Thus, to convert from units of Fahrenheit to units of Celsius, one subtracts 32 °F (the offset from the point of reference), divides by 9 °F and multiplies by 5 °C (scales by the ratio of units), and adds 0 °C (the offset from the ...

  6. Silicate - Wikipedia

    en.wikipedia.org/wiki/Silicate

    The family includes orthosilicate SiO 4− 4 (x = 0), metasilicate SiO 2− 3 (x = 1), and pyrosilicate Si 2 O 6− 7 (x = 0.5, n = 2). The name is also used for any salt of such anions, such as sodium metasilicate ; or any ester containing the corresponding chemical group , such as tetramethyl orthosilicate . [ 1 ]

  7. Silicon compounds - Wikipedia

    en.wikipedia.org/wiki/Silicon_compounds

    Thus the Si–F bond is significantly stronger than even the C–F bond and is one of the strongest single bonds, while the Si–H bond is much weaker than the C–H bond and is readily broken. Furthermore, the ability of silicon to expand its octet is not shared by carbon, and hence some organosilicon reactions have no organic analogues.

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