| 单词 | pentoxide |
| 例句 | The phosphorus pentoxide used to produce phosphoric acid for cola soft drinks is prepared by burning phosphorus in oxygen. Chemistry 2019-02-14T00:00:00Z Wyser said vanadium pentoxide was available and cheap, but was just one of many materials being tested for car batteries at the moment with an uncertain outcome. Watchmaker Swatch goes into car batteries as investors question strategy 2016-12-22T05:00:00Z Such oxides as sulphur trioxide, nitrogen pentoxide, etc., do not possess acid properties except in combination with water. Heroes of Science Chemists 2011-12-09T03:00:21.047Z Maleic anhydride is obtained by distilling fumaric acid with phosphorus pentoxide. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z That is possible because this part of the transistor is made of tantalum pentoxide, a material whose atoms are arranged in a lattice which contains holes large enough for copper atoms to squeeze through. New transistors: Mechanical advantage 2011-07-14T11:01:07Z The researchers begin with tantalum pentoxide, but deposit the two layers using different deposition processes creating a multilayered thin film. Mantis Shrimp Eye Could Improve HD CDs, DVDs 2011-06-27T15:22:00Z Nitric acid oxidizes antimony either to the trioxide Sb4O6 or the pentoxide Sb2O5, the product obtained depending on the temperature and concentration of the acid. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" Phosphoric acid was therefore regarded by Graham as a compound of pentoxide of phosphorus and water, the latter being as essentially a part of the acid as the former. Heroes of Science Chemists 2011-12-09T03:00:21.047Z When a lubricant is wanted that will withstand the action of ether, the tap may be lubricated by sprinkling phosphorus pentoxide upon it, and exposing it to air till the oxide becomes gummy. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students It may be prepared by fusion of ortho-toluene sulphonic acid with potash; by the action of phosphorus pentoxide on carvacrol; or by the action of zinc chloride on camphor. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6 "Coucy-le-Château" to "Crocodile" It is only known in solution; evaporation of the solution yields the pentoxide. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" The lower part of the whole apparatus was inclosed in a thick walled vessel, e, containing a layer of phosphorus pentoxide. Scientific American Supplement, No. 1082, September 26, 1896 This is easily done in the case of electrometer jars, and so long as the air remains perfectly dry through the action of sulphuric acid or phosphorus pentoxide, the jar will insulate. On Laboratory Arts When phosphorus burns in an insufficient supply of air the product is partially the trioxide; in oxygen or an excess of air the pentoxide is formed. An Elementary Study of Chemistry This gives the weight of the pentoxide in the sample. A Text-book of Assaying: For the Use of Those Connected with Mines. It burns when heated in air, forming the pentoxide and sulphur dioxide. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" As the phosphoric anhydride, or pentoxide, which is produced when a gas containing phosphorus burns, is a solid body, it may be deposited at the burner jets. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power The phosphorus pentoxide tube is best made as shown simply from a bit of wide tube, with two side connections fused to the rest of the pump. On Laboratory Arts The pentoxide is much the better known of the two. An Elementary Study of Chemistry When the sulphuric oxide has been satisfied, the chlorine is distributed, taking the bases in the same order, then the nitric pentoxide, and lastly the carbon dioxide. A Text-book of Assaying: For the Use of Those Connected with Mines. It burns readily in air, and is converted into the pentoxide when fused with acid potassium sulphate. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" The apparatus consists of a solid and heavy block of wood supporting a calcium-chloride tube permanently connected with a tube of phosphorus pentoxide divided into compartments by plugs of glass wool. On Laboratory Arts The phosphorus pentoxide should be pure, or rather free from phosphorus and lower oxides; unless this be the case, the vapour arising from it is apt to soil the mercury in the pump. On Laboratory Arts The phosphorus combines with the oxygen to form an oxide of phosphorus, known as phosphorus pentoxide. An Elementary Study of Chemistry The loss in weight gives the amount of nitrogen pentoxide. A Text-book of Assaying: For the Use of Those Connected with Mines. Columbium 741 tetroxide, Cb2O4 is obtained as a black powder when the pentoxide is heated to a high temperature in a current of hydrogen. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" It has no chemical action upon most gases, so that they can be very thoroughly dried by allowing them to pass through properly arranged vessels containing phosphorus pentoxide. An Elementary Study of Chemistry |
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