4. Water is a compound containing the _elements (element) of hydrogen and oxygen. 相关知识点: 试题来源: 解析 答案见上4.elements〔提示:句意:水是含有氢元素和氧元素的化 合物。element n. 元素。 根据后面的 hydrogen 和 oxygen 可知,应用复数形式,故填 elements。 ] ...
A. Copper oxide B. Oxygen copper C. Copper oxygen D. Oxide copper 相关知识点: 试题来源: 解析 A。解析:铜(copper)是金属元素,氧(oxygen)是非金属元素。根据英文命名规则,金属在前,非金属在后且氧变为oxide,所以是Copper oxide。B、C、D选项不符合正确的命名规则。反馈...
aA compound is a substance that can be split into two or more elements. Water is a compound because it can be split into its components, hydrogen and oxygen. 化合物是可以被分裂成两个或多个元素的物质。 因为它可以被分裂成它的组分、氢和氧气,水是化合物。[translate]...
(a) 21%. (b) 77%. (c) 50%. (d) 16%. (e) 35%. Oxygen: Oxygen is a chemical element. In the Earth's atmosphere, oxygen exists as a diatomic molecule with the chemical formula of O2. It is the electron carrier for all organisms utilizing aerobic respiration...
英语化学求分子式和试验试!A compound contains only carbon,hydrogen,and oxygen.Combustion of 10.68 mg of the compound yields 16.01 mg CO2 and 4.37 mg H2O.The molar mass of the compound is 176.1 g/mol.What are the empirical and molecular for
Water is a compound c___ the elements of hydrogen and oxygen.(根据首字母单词拼写) 相关知识点: 试题来源: 解析 containing [解析] 考查非谓语动词。句意:水是一种含有氢和氧元素的化合物。根据句意以及首字母提示,空处应用动词contain,表示“包含,含有”,contain与逻辑主语compound之间是主动关系,所以空处...
基础练习 — —单句语法填空(1)Water is a compound(contain) the elements hydrogen and oxygen.(2)Be especially careful of information(contain) in advertisements.(3)He was so excited that he could hardly contain(he). 相关知识点: 试题来源: 解析 2. (1)containing (2)contained (3)himself ...
Ask a question Search AnswersLearn more about this topic: Oxygen Properties, Formulas & Uses from Chapter 28 / Lesson 27 38K Learn about oxygen and the forms it takes. Discover the properties of elemental oxygen, the O2 compound name, and the O3 compound, as well as their uses. Relate...
In order to calculate the percent (%) composition of oxygen (O) in water (H2O), you must determine the mass of the total compound, in...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough homework...
Oxygen is the second most abundant gas in air. - The percentage of oxygen in air is approximately 20.9%. 2. Explain Why Oxygen is Called Active Air: - Oxygen is referred to as "active air" because it plays a crucial role in supporting life. - Living organisms, including humans and ...