百度试题 结果1 题目26 What is the minimum number of hydrogen bonds in a length of DN A containing 700 base pairs? C A 350 B 700 C 1400 D 2100 相关知识点: 试题来源: 解析 C 反馈 收藏
Which type of bond between water molecules creates the surface tension of water? What type of compound is not likely to dissolve in water? What is a dissolved substance called? For hydrogen, what is the energy of the first excited state?
Which molecule will have hydrogen bonding as its strongest type of intermolecular force? a. CHF3 b. H2O c. PH3 d. OF2How do hydrogen bonds in water form?How does the strength of an intermolecular force compare to the strength of a covalent bond or an ionic...
LIU W; YAO K.What causes the unfrozen water in polymers: hydrogen bonds between water and polymer chains.Polymer.2001.3943-3947Liu,WG,Yao,KD.What causes the unfrozen water in polymers: hydrogen bonds between water and polymer chains?.Polymer. 2001...
Photolysis of water is another major procedure, where water molecules absorb energy at around 285.57 kJ/mole using ultraviolet radiations. The breaking of H-O bonds by high energy bonds releases hydrogen in the presence of catalysts, including tin oxide, sulfur oxides, etc.8 In recent years, ...
etc., was first conceived and realized in the early decades of the last century, when it was not clear why the melting points and latent heats of water, ammonia, or hydrogen fluoride were higher than those of other hydrides of heavier elements (such as H2S, HCl, PH3, SiH4, etc.). St...
Inice, the crystalline lattice is dominated by a regular array of hydrogen bonds which space the water molecules farther apart than they are in liquid water. This accounts for water's decrease in density upon freezing. In other words, the presence of hydrogen bonds enables ice to float, becau...
water molecules, each of which carries a polar charge. If the attraction between the ions and the water molecules is great enough to break the bonds holding the ions together, the compound dissolves. When this happens, the ions dissociate and disperse in solution, each surrounded by water ...
Even chemically pure, neutral water contains hydrogen ions due to the autodissociation of water [1]. In this process, water molecules are broken up into simpler constituents (i.e. ions). [1] H2O ⇔ H++ OH- In this reaction, H2O is deprotonated (i.e. loses a proton). This results...
Producing hydrogen takes energy because hydrogen atoms don't exist on their own — they are almost always stuck to another atom, often another element. (On earth, hydrogen is particularly abundant in the form of water, or H2O.) Creating pure hydrogen requires breaking those molecular bonds. ...