| 单词 | Zn |
| 例句 | Large amounts of 65 Zn are produced in copper exposed to accelerator beams. College Physics for AP Courses 2015-08-12T00:00:00Z Metals that crystallize in an HCP structure include Cd, Co, Li, Mg, Na, and Zn, and metals that crystallize in a CCP structure include Ag, Al, Ca, Cu, Ni, Pb, and Pt. Chemistry 2019-02-14T00:00:00Z Geochemistry of CI chondrites: major and trace elements, and Cu and Zn isotopes. Halogens in chondritic meteorites and terrestrial accretion 2017-11-28T05:00:00Z The molecular era of discovery in ALS began with the identification of dominant mutations in the gene SOD1, which encodes an abundant, ubiquitously expressed cytoplasmic enzyme called Cu–Zn superoxide dismutase2. Decoding ALS: from genes to mechanism : Nature : Nature Research 2016-11-08T05:00:00Z The scale bar in the Zn quadrant of the maps is as designated and applies to all parts of the figure. [Research Article] A Bacterium That Can Grow by Using Arsenic Instead of Phosphorus 2011-06-02T18:26:22.637Z Let Pt represent a plate of platinum, and Zn a plate of zinc, both placed in a vessel containing hydrochloric acid, which is also represented by the symbols HCl. The Telephone An Account of the Phenomena of Electricity, Magnetism, and Sound, as Involved in Its Action Pt 36 30 Zn 23 21 Al 39 27 Cd 25 21 Pb .. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" When a strip of zinc is placed in a solution of a copper salt the copper is precipitated and an equivalent quantity of zinc passes into solution: Zn + CuSO4 = Cu + ZnSO4. An Elementary Study of Chemistry Sulphides of Mn, Zn, Fe, Ni, Co, In, Tl, and Ga. These can again be divided into those which are dissolved by dilute acids and those which are not. A Text-book of Assaying: For the Use of Those Connected with Mines. Given the spatial resolution of these images, the structures identified as containing high As, Fe, and Zn are aggregates of cells. [Research Article] A Bacterium That Can Grow by Using Arsenic Instead of Phosphorus 2011-06-02T18:26:22.637Z One of the three similar pillars is shown in the accompanying diagram under Zn a. Occult Chemistry Clairvoyant Observations on the Chemical Elements With 2 parts of alkali and 1 of borax fuses to a glass and sets free .Zn, A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations Of course Zn must have a stronger chemical affinity for Cl than H has, or the change could not have taken place. An Introduction to Chemical Science Zinc, Zn.—It is sold in a granulated form or in sticks. A Text-book of Assaying: For the Use of Those Connected with Mines. Experiment 37.—Perform this experiment in the same manner as the two previous ones, dissolving a small piece of Pb, and using a strip of Zn to precipitate the Pb. An Introduction to Chemical Science The spheres within the globes at the base of the spikes, Zn b, behave as a cross—the cross is a favourite device in the II a groups. Occult Chemistry Clairvoyant Observations on the Chemical Elements We. express this affinity by saying that Zn is the most positive of the four metals, while Ag is the most nega- tive. An Introduction to Chemical Science Why one Zn atom replaces two H atoms will be explained later, asfar as an explanation is possible. An Introduction to Chemical Science Cu is positive to Ag, but negative to Pb and Zn. An Introduction to Chemical Science Mg would withdraw Zn from a similar solution, and be in its turn withdrawn by Na. An Introduction to Chemical Science Finally, the central globe, Zn c, follows the same cruciform line of disintegration. Occult Chemistry Clairvoyant Observations on the Chemical Elements Construct a diagram of the apparatus, marking the Zn in the liquid +, since it is positive, and the C, or other element, -. An Introduction to Chemical Science A proportion may be made as follows:— Zn given : Zn required :: H given : H required. An Introduction to Chemical Science Mark the electrode attached to the Zn -, and that attached to the C +; positive electricity at one end of a body commonly implies negative at the other. An Introduction to Chemical Science P, As, Hg, Zn, have exceptional atomic volumes. An Introduction to Chemical Science All the chemicals must be pure, since As is found in small quantities in most ores, and the Zn, HCl, and H2SO4 of commerce are very likely to contain it. An Introduction to Chemical Science Exceptions: Some, as Ph and Zn, will not alloy with one another. An Introduction to Chemical Science Solving, we have 8 g H. How much H is obtainable by using 5 g Zn, as in the experiment? An Introduction to Chemical Science Pewter is composed of Sn and Pb; brass, of Cu and Zn; German silver, of brass and Ni; bronze, of Cu, Sn, and Zn; aluminium bronze, of Cu and Al. An Introduction to Chemical Science The oxide is reduced with C, and then Zn is distilled. An Introduction to Chemical Science Zinc is sublimed-in the form of zinc dust-like flowers of S. Granulated Zn is made by pouring a stream of the molten metal into water. An Introduction to Chemical Science Experiment 121.—Burn a strip of Zn foil, and note the color of the flame and of the product. An Introduction to Chemical Science To avoid error in solving similar problems, the best plan is as follows:— Zn + 2HCl = ZnCl2 + 2 H | 65:5::2:x 65 2 | 65 x = 10 5 x | x = 10/65 = 2/13 Ans. An Introduction to Chemical Science Uses.—Name any use of Zn in the chemical laboratory. An Introduction to Chemical Science This is done by plunging the wire or the sheets of iron into melted Zn. An Introduction to Chemical Science Describe the use of Zn as an alloy. An Introduction to Chemical Science Sn, Pb, and Zn are somewhat soluble in vegetable acids. An Introduction to Chemical Science How much Zn is required to produce 30 g. An Introduction to Chemical Science Cover the Zn with water, and introduce through the thistle-tube measured quantities of HCl, a few cubic centimeters at a time. An Introduction to Chemical Science Should any Zn or other solid substance be left, pour off the water or filter it, weigh the dry residue, and deduct its weight from that of the Zn originally taken. An Introduction to Chemical Science Cover 5 g. granulated Zn, in the t.t., with 10 cc. An Introduction to Chemical Science Notice that the water does not take part in the change; it is added to dissolve the ZnCl2 formed, and thus keep it from coating the Zn and preventing further action of the acid. An Introduction to Chemical Science In the union of Zn and O, each has two bonds; H hence they unite atom with atom, Zn = O, or ZnO. An Introduction to Chemical Science Note also that Zn has simply changed places with H, one atom of the former having driven off two atoms of the latter. An Introduction to Chemical Science |
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