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Some workers prefer the opposite arrangement, where vapors flow down the wall of the trap, and are sucked up the inner tube; this reduces blockage. [1] In vacuum applications, a cold trap is a device that condenses all vapors except the permanent gases (hydrogen, oxygen, and nitrogen) into a liquid or solid.
The Trapp mixture is a specific mixture of organic solvents that allows chemical reactions to take place at very low temperatures. [1] It is made up of THF:diethyl ether:pentane in a 4:4:1 ratio which remains liquid down to −110 °C and the same solvents in a 4:1:1 ratio remain a liquid down to −120 °C.
The inert-gas line is vented through an oil bubbler, while solvent vapors and gaseous reaction products are prevented from contaminating the vacuum pump by a liquid-nitrogen or dry-ice/acetone cold trap. Special stopcocks or Teflon taps allow vacuum or inert gas to be selected without the need for placing the sample on a separate line. [3]
Organic solvent or salt Temp (°C) Dry ice p-xylene +13 Dry ice Dioxane +12 Dry ice Cyclohexane +6 Dry ice Benzene +5 Dry ice Formamide +2 Ice Salts (see: left) 0 to −40 Liquid N 2: Cycloheptane −12 Dry ice Benzyl alcohol −15 Dry ice Tetrachloroethylene −22 Dry ice Carbon tetrachloride −23 Dry ice 1,3-Dichlorobenzene −25 Dry ice o ...
Maglite (also spelled Mag-Lite, stylized as MAG-LITE) is a brand of flashlight manufactured in the United States by Mag Instrument, Inc. located in Ontario, California, and founded by Anthony Maglica. It was introduced in 1979.
We put the best air purifiers from Lenovo, Honeywell, Winix, and more to the test to see which held up best (and actually purified the air for you). See what our product scientist has to say.
In chemistry, a chemical trap is a chemical compound that is used to detect unstable compounds. [1] The method relies on efficiency of bimolecular reactions with reagents to produce a more easily characterize trapped product. In some cases, the trapping agent is used in large excess.
No, heated outdoor cat houses are designed to be energy-efficient. Most use low-wattage heating pads, typically consuming between 10 to 40 watts — about the same as a small light bulb.