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下列有关反应热及能量变化的说法正确的是 A．1mol碳燃烧生成CO时所放出的热量就是碳的燃烧热 B．从化石能源到能源的多元化，其中氢能属于不可再生能源 C．放热反应可以自发进行，而吸热反应需加热才能进行 D．应用盖斯定律，可计算某些难以直接测量的反应焓变 ...
Answer to: Explain why PbCl2 does not precipitate immediately upon the addition of HCl. What condition must be met by Pb2+ and Cl- if PbCl2 is to...
Both shape and geometry are considered in accordance with the hybridization of that particular compound. They can be the same or different. In case no lone pairs are present, then the geometry and shape are the same but when a lone pair is present, this is not the case. ...
Solubility is the maximum amount of solute that can be dissolved in a particular volume of solvent at a specific temperature. The solubility of the solute depends on the nature of the compound as well as the environmental factors such as temperature....
Why is Br2 stronger than BrCl? 2. C) Br2 and Cl2 can react to form the compound BrCl. ... However, due to the greater polarizability of the electron cloud of Br2 compared to that of BrCl,the London forces in Br2 (l) are stronger thanthe combined intermolecular forces in BrCl (l...
One of the reasons as to why a reaction might not happen even though the reactivity series indicates it should occur is the presence of a protective...Become a member and unlock all Study Answers Try it risk-free for 30 days Try it risk-free Ask a question O...
I'm sure the error is because i'm plugging a 1:252 vector into a 2:1 matrix, but how do i change the 2:1 matrix size to fit the vector in? This is the first time i'm using matlab, so i'm not really familiar with it.I...
rated cables when combined with an efficient category such as Cat 5, Cat5e, Cat6, Cat6a, or Cat7; it offers flawless results. When you need higher efficiency and performance, Use of CMP cables is preferred to be a better option from the other cable ratings such as CL2, CL3, or riser...
材料一：爱因斯坦：一个人的价值，应该看他贡献什么，而不是应该看他取得什么。材料二：“人无信不立，业无信难兴，政无信必颓”。 要形成以道德为支撑、产权为基础、法律为保障的社会信用制度，是建设现代市场体系的必要条件，也是规范市场经济秩序的治本之策。增强全社会的信用意识，政府、企事业单位和个人都要...