关于高中化学的题目
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亲，题目发来看看
咨询记录 · 回答于2022-04-21
关于高中化学的题目
亲，题目发来看看
1. How do you indicate that a substance in an equation is a solid?
A. (l) B. (s) C. (g) D. (aq)
________2. Oxygen gas is always written as O2 in chemical equations. What term is used to describe the 2 in this formula?
A. product B. coefficient C. superscript D. subscript
________3. Which of the following types of reaction is the opposite of a synthesis reaction? A. single-displacement B. combustio
____7. A precipitate, water, or a gas forms. when
two ionic compounds in solution are combined. ________8. Two or more substances combine to form another substance.
________9. One element replaces another in a compound. ________10. One substance breaks down into two or more substances.
III Short Respond 70'
Write your answer in the blank following each question.
Column II
a. Synthesis reaction
还是英文的题目啊
b. Decomposition reaction
c. Single-displacement d. Double-displacement
是的
这是竞赛题吧
是的
好的
稍微快一点哦，最好在10.25左右给我谢谢
第一题选B，固体
第二个选D下标
第三个选A
后面的依次是D，A，C，B
以上是所有问题的答案，只要翻译过关，问题很简单
最后一题问的是反应类型
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