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Propylene carbonate (often abbreviated PC) is an organic compound with the formula C 4 H 6 O 3. It is a cyclic carbonate ester derived from propylene glycol. [4] This colorless and odorless liquid is useful as a polar, aprotic solvent. [5] Propylene carbonate is chiral, but is used as the racemic mixture in most contexts.
imp gal atm ≡ 1 atm × 1 gal (imp) = 460.632 569 25 J: gallon-atmosphere (US) US gal atm ≡ 1 atm × 1 gal (US) = 383.556 849 0138 J: hartree, atomic unit of energy: E h: ≡ m e ⋅α 2 ⋅c 2 (= 2 Ry) ≈ 4.359 744 × 10 −18 J: horsepower-hour: hp⋅h ≡ 1 hp × 1 h = 2.684 519 537 696 172 792 × 10 6 J: inch-pound force: in lbf ≡ g 0 ...
Recycling codes on products. Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process.The presence on an item of a recycling code, a chasing arrows logo, or a resin code, is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.
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The British imperial gallon (frequently called simply "gallon") is defined as exactly 4.54609 dm 3 (4.54609 litres). [4] It is used in some Commonwealth countries, and until 1976 was defined as the volume of water at 62 °F (16.67 °C) [ 5 ] [ 6 ] whose mass is 10 pounds (4.5359237 kg).
The US fluid ounce is based on the US gallon, which in turn is based on the wine gallon of 231 cubic inches that was used in the United Kingdom prior to 1824. With the adoption of the international inch, the US fluid ounce became 1 ⁄ 128 gal × 231 in 3 /gal × (2.54 cm/in) 3 = 29.573 529 5625 mL exactly, or about 4.08% larger than the ...
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A sixth (1 ⁄ 6, or 0.166) of a US Gallon, rounded up from its actual volume of 21.33 US fl oz. Formerly used for cheap liquor like gin and vodka. It was supposed to be replaced by the 500 mL "half-liter", which was dropped in 1989, but is sometimes used for craft beer and malt liquor.