2 This question is about hydrogen and some compounds containing hydrogen.(a) Hydrogen is a gas at room temperature.Describe the arrangement and motion of the molecules in hydrogen gas.arrangement motion2](b)Draw the electronic structure of a hydrogen molecule.[1(c) The symbols for two isotopes...
根据第一段第四句“Butsomethingsrequiremoreenergy, andcan'tbechangedovertoelectricitysoeasily.(但是有些事情需要更多的能量,而且不能很容易地转化为电能)”和第五句“Buthydrogencouldbeusedinmanyofthesecases.(但是氢气可以用于这些情况)”可知,氢气的使用范围更广。故选C。13.【答案】A【解析】题干意思是:...
A method for making a thin, self-supporting disc from a substance, such as hydrogen, which is a gas at room temperature said disc being eventually located in a vacuum. A metal member is provided which defines a hole having a diameter small enough that at a sufficiently low temperature a ...
Which volume of hydrogen gas (room temperature and pressure, RTP) is formed when 6.5 g of zinc is reacted with sufficient dilute sulfuric acid?( ) A. 1.12 L B. 2.24 L C. 2.4 L D. 22.4 L 相关知识点: 试题来源: 解析B 题目的翻译为:6.5 g Zn 与足量稀硫酸反应,会生成多少体积的 H2...
7 At room temperature and pressure, H2O is a liquid and H2S is a gas.What is the reason for this difference?C A O has higher first and second ionisation energies than S. B The covalent bond between O and H is stronger than the covalent bond between S and H. C There is significant...
Hydrogen is an important element in the study of chemistry and has many potential applications in the future. 1. Hydrogen is a very ___ gas. A. heavy B. light C. dense D. hard 相关知识点: 试题来源: 解析 B。解析:文章中明确提到 Hydrogen is a very light gas.。反馈 收藏 ...
aYour Passport Status 您的护照状态[translate] areference with sign 参考与标志[translate] aHydrogen-rich gas is produced at temperatures higher than 700 K with the maximum yield attained at 900 K. 富有氢的气体导致在温度更加高于700 K与最大出产量被获得在900 K。[translate]...
Normally, hydrogen is a gas. 子句类型: 并列句 连接词: 子句-2 Under pressures of millions of kilograms per square centimeter, the hydrogen atoms might lock together to form a liquid with the properties of a metal. 子句类型: 并列句 连接词:BUT 子句-3 The pressures exist in the dee...
A. only water B. natural gas and water C. only natural gas D. nowhere 相关知识点: 试题来源: 解析 B。解析:文中提到 Hydrogen is found in many different forms. It is present in water as one part hydrogen and two parts oxygen. It is also found in natural gas and other hydrocarbons.。
A. heavy and colorful B. light and colorless C. heavy and odorless D. light and smelly 相关知识点: 试题来源: 解析 B。中文解析:文章中明确提到 Hydrogen is a very light gas...is colorless, odorless, and tasteless.(氢是一种很轻的气体,无色、无味、无臭),所以答案是 B。反馈 收藏 ...