百度试题 结果1 题目Write the chemical formula for carbon dioxide.相关知识点: 试题来源: 解析 CO₂ 反馈 收藏
What element is formed during the alpha decay of uranium-235? What is an oxygen-18 atom? What isotope remains after the alpha decay of polonium-212? What is the chemical symbol for ytterbium? What is the radioactive isotope of carbon?
Write the chemical formula for carbon dioxide.搜索 题目 Write the chemical formula for carbon dioxide. 答案 解析 null 本题来源 题目:Write the chemical formula for carbon dioxide. 来源: crazy练习题 收藏 反馈 分享
The chemical substance used to test carbon dioxide is ___. A. limewater B. water C. alcohol D. oil 相关知识点: 试题来源: 解析 A。检验二氧化碳用澄清石灰水,即 limewater。选项 B 是水,选项 C 是酒精,选项 D 是油。所以答案是 limewater。反馈...
Chemical formulas tell scientists the type and number of atoms in a chemical compound. The type of atom is represented using the chemical symbol found on the periodic table. Subscripts that follow the chemical symbol tell us the number of atoms of the element that are in the compound. If no...
A. carbon dioxide B. oxygen C. water D. nitrogen 相关知识点: 试题来源: 解析 A。光合作用必不可少的化学物质是二氧化碳。选项 A 是二氧化碳,选项 B 是氧气,选项 C 是水,选项 D 是氮气。光合作用是植物利用二氧化碳和水在光照条件下合成有机物并释放氧气的过程,所以答案是 carbon dioxide。反馈...
百度试题 结果1 题目The chemical element that makes up diamonds is ___. A. carbon B. silicon C. oxygen D. nitrogen 相关知识点: 试题来源: 解析 A。diamonds 钻石是由碳元素组成的;silicon 硅;oxygen 氧;nitrogen 氮。反馈 收藏
stars : carbonstars : evolutionA chemical study of normal Galactic C(N) carbon stars is presented. Abundances of Li, CNO isotopes and s-elements are derived. The derived abundances of s-elements nicely agree with theoretical s-process nucleosynthesis predictions during the AGB phase. However, ...
2The word "carbon"(I.ine 4, Para. 2) stands for" ___ ". A.intelligent robotsB.a chemical elementC.an organic substanceD.human beings 3The word "carbon" (Line 5, Para. 2) Stands for ___. A.intelligent robotsB.a chemical elementC.an organic substanceD.human beings 4The wo...
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