General Chemistry Chapters Essay

The rate of decay (disintegration) of U-238 is proportional to its sample size. Changes in temperature or pressure cannot affect the rate of decay (disintegration) of radioactive elements. Decay constant maintains its constancy only at the specific temperature. How much energy is lost or gained when a mole of cobalt-60 undergoes beta decay: coco MM + 0-e? The mass of the coco atom is 59. 933819 AMA, and that of a ninny atom is 59. 930788 AMA. Answer 2. 724×1011 J energy is released. 2. 724×1011 J energy is absorbed. 2. 724×108 J energy is released. 2. 724×108 J energy is absorbed.

Write a balanced nuclear equation for the reaction in which oxygen-1 5 undergoes 1 580 OFF + 0-111 1480 + Leo OFF + 0-e INN + Ole What element undergoes alpha decay to form lead-208? 21284P0 20484P0 21282P0 20482P0 CHAPTER 21 Which process is not a part of the purification metals? Distillation electrolysis zone refining chemical reduction By what kind of element can a n-type semiconductor be doped? Answer AAA Here, As, Antimony s By what kind of element can a p-type semiconductor be doped? Answer MGM Here and AAA Which process does not show the production of metal by chemical reduction?

Answer viva(s) + sac(l) IV(l) + cacaos(s) Tactic) + OMG(l) roasting cacao(s) GO(s) carry(s) + al(S) It(S) + McGee(l) car(l) + AWAY(s) cue Zen co What is amalgam? An alloy of aluminum with another metal or metals. An alloy of mercury with another metal or metals. An aluminum bauxite mixture an aluminum ferromagnetic metals What is a p-type semiconductor? A semiconductor that contains donor impurities which have excess electrons. A semiconductor that contains acceptor impurities which have excess electrons. A semiconductor that contains donor impurities which are electron deficient.

T What is doping? Enhancing the ability of a semiconductor to conduct heat by adding small amount of certain impurities to the element. Enhancing the ability of an insulator to conduct electricity by adding small amount of certain impurities to the element. T Enhancing the ability of a semiconductor to conduct electricity by adding small amount of certain impurities to the element. Enhancing the ability of a semiconductor to conduct electricity by adding significant What is the correct sequence of the recovery off metal from its ore?

Answer reparation of the ore production of the metal purification of the metal preparation of the ore purification of the metal production of the metal purification of the metal preparation of the ore production of the metal production of the metal purification of the metal preparation of the ore Which one of the following is the best electric conductor? C CHAPTER 22 Which aqueous solution of coccids of the halogens is the strongest acid? Answer HCI WHICH WHICH Here check WHICH Which one is not metal? Here (metalloid) check Which oxide is basic? Isis ASS

Here (alkaline earth met)? MGM CHECK Which is not an isotope of hydrogen? Hydrogen tritium deuterium dexterity Which one is in mismatch? Ammonia – NH Nitrous oxide – NON Nitric oxide – NO HON. – nitric acid Which aqueous solution of hydrogen halide is the weakest acid? Answer Hob HCI Which one is wrong about carbides? True Coca and Beech are examples of carbides In carbides carbon combines with metals to form ionic compounds. Carbon in Beech takes the ionic form of CO-. Here check!!! No answer Which one is not covalent hydride?

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