As a unique energy source with almost zero harmful emissions, hydrogen is central to the energy sector. The demand for hydrogen as an energy source is expected to increase by more than seven times by 2040. However, hydrogen is not naturally available in a usable form for energy storage techno...
A hydrogen atom has one electron. How many covalent bonds can the hydrogen form? Covalent bonds tend to form between what? When do hydrogen bonds occur? Which type of bonds or interactions between atoms is the strongest? What type of bond is formed in a covalent compound?
What type of chemical bond connects atoms that equally share electrons such as the bonds between a hydrogen atom and a carbon atom in methane? Which of the following can form hydrogen bonds with water? HCOOH(aq), CH_4(aq), HF(aq), CH_3OCH_3(aq), HI...
the most unique elements in the periodic table. The metal is only one of two elements that are liquid at standard temperature and pressure (stp). Mercury also has a very short temperature range between the freezing and boiling points. Mercury is the only transition metal with these properties....
such as what kinds of compounds the element will form. We can even predict the physical properties of some elements: allotropic forms, melting points and so on. So does the ‘basic’ definition of an element contain the all the ‘simple’ characteristics within it, to be revealed as our co...
Nonpolar molecules do not dissolve easily in water. They are described as hydrophobic, or water fearing. When put into polar environments, such as water, nonpolar molecules stick together and form a tight membrane, preventing water from surrounding the molecule. Water's hydrogen bonds create an en...
D. (2001). "What causes the unfrozen water in polymers: Hydrogen bonds between water and polymer chains?," Polymer 42(8), 3943-3947.Liu W,,Yao K.What causes the unfrozen water in polymers:hydrogen bonds between water and polymer chains. Polymer . 2001...
But, the main reason saturated fats have the effects on health they do is because of their chemical structure. For example, saturated fats have single bonds between carbon molecules that are completely saturated with hydrogen (3). This structure makes them solid at room temperature (3). When...
All lipids are made up of the same atoms: carbon (C), hydrogen (H) and oxygen (O). Lipids contain the same elements that make up carbohydrates but in different proportions. Lipids have a large proportion of carbon and hydrogen bonds and a small proportio
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