
Topic4 物质的组成-Revision
Presentation
•
Chemistry
•
9th Grade
•
Hard
Mary Chu
Used 1+ times
FREE Resource
10 Slides • 20 Questions
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Fill in the Blanks
What is the definition of an element?单质的定义
Type answer...
12
Fill in the Blanks
What is the definition of a compound?化合物的定义
Type answer...
13
Multiple Choice
同种元素组成的物质一定是单质
True
False
14
Multiple Select
Which of the following substances are composed of molecules?下列哪些物质是由分子组成的?
Water水
Carbon dioxide二氧化碳
Benzene苯
Iron铁
15
Multiple Select
Which of the following substances are composed of atoms?下列那物质是由原子组成的?
Oxygen氧气
Iron铁
Diamond金刚石
Table salt食盐
16
Multiple Select
下列物质中由离子组成的有哪些?
氧化钠
氯化钾
盐酸
硫酸铜
17
Multiple Choice
下列不属于微粒性质的是
微粒(体积和质量)很小
微粒无时无刻的不不断运动
微粒间有一定空隙
分子是保持物质化学性质的最小微粒
18
Multiple Choice
高锰酸钾KMnO4中,锰元素的化合价是
+5
+7
19
Multiple Choice
氯酸钾KClO3中,氯元素的化合价是
+5
+7
20
Multiple Choice
什么是相对原子质量Ar?
相对原子质量是指某一原子的质量与碳-12原子质量的1/12之比。
相对原子质量是指原子的体积与水的体积之比。
相对原子质量是指原子的质量与氧气分子的质量之比。
相对原子质量是指原子的质量与氢原子的质量之比。
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Multiple Choice
请问你怎么获得相对原子质量Ar?
根据定义进行计算
查元素周期表,元素所在cell里最靠前/最大的那个
查元素周期表,元素所在cell里最靠后/最小的那个
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Fill in the Blanks
什么是式量/相对分子质量Mr?
Type answer...
23
Multiple Choice
Which of the following descriptions about the amount of substance is incorrect?下列关于物质的量描述错误的是?
Represents the amount of particles
The unit is mole
The symbol is mol
The value is less than or equal to 6.02×1023
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Multiple Choice
Which of the following descriptions about molar mass is incorrect?下列关于摩尔质量描述错误的是?
The value is equal to the relative molecular mass
The value is equal to the relative atomic mass
The unit is g/mol
The symbol is M
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Multiple Choice
Which of the following descriptions about molar mass is incorrect?下列关于摩尔质量描述错误的是?
The mass of 1 mol of a substance is the molar mass
The molar mass is equal to the mass of the substance in grams divided by the relative molecular mass
The unit of molar mass is g
The unit of molar mass is g/mol
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Multiple Choice
Given the mass of a substance, please write the formula for calculating the amount of substance.已知物质的质量,求物质的量的公式是:
Amount of substance (mol) = mass (g) / molar mass (g/mol)
Amount of substance (mol) = molar mass (g/mol) / mass (g)
Amount of substance (mol) = mass (g) × molar mass (g/mol)
Amount of substance (mol) = mass (g) + molar mass (g/mol)
27
Multiple Choice
The ratio of the amount of substances between substances represented by a chemical equation is化学反应方程式表示物质的数量之间的关系
True
False
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Multiple Choice
Which of the following must change before and after a chemical reaction?反应前后一定变化的是?
Number of atoms
Number of molecules
Type of substance
Total amount of substance in the reactants and products
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Multiple Select
化学反应方程式可以可以提供哪些信息
反应物, 生成物的种类
反应物, 生成物各物质的质量的比
反应物, 生成物各物质的质量之比
反应条件
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Open Ended
什么是元素的质量分数?
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