Answer:
Ví dụ về tính chất hóa học bao gồm tính dễ cháy, tính độc, tính axit, khả năng phản ứng (nhiều loại) và nhiệt của quá trình cháy.
Explanation:
Answer:
The frequencies of the two lines are:
a) 
b)
When we heat rubidium compound we will see red color.
Explanation:
c = speed of light
= wavelength of light
a) Frequency of the light when wavelength is equal to 
This frequency corresponds to red light
b) Frequency of the light when wavelength is equal to 
This frequency corresponds to violet light
When we heat rubidium compound we will see red color.
Answer
36.45 u; X = Cl
Explanation:
The atomic mass of X is the <em>weighted averag</em>e of the atomic masses of its isotopes.
We multiply the atomic mass of each isotope by a number representing its relative importance (i.e., its percent of the total).
Set up a table for easy calculation
.
0.7577 × 34.969 u = 26.496 u
0.2423 × 36.965 u = <u> 8.9566 u
</u>
TOTAL = 36.45 u
X = Cl
Measure reactants precisely.
Stir to help the reaction take place.
Wait patiently until the reaction completes.
Make sure to recover as much copper as possible.
Explanation:
Anything that increases the rate of this reaction will improve the yield of copper production.
The rate of reaction is usually a factor of how the concentration of reactants and products changes with time.
Some of the factors that affects the rate of a reaction are:
- Nature of reactants
- concentration or pressure if gases
- temperature
- presence of catalysts
- degree of mixing
In this reaction:
- to ensure we have the maximum amount of copper produced, measure out the exact/accurate amount of reactants stated
- make sure you stir the reactants to ensure they mix and combine.
- ensure you are not too much in haste. Wait for the reaction to go into completion.
- recover as much copper as possible
learn more:
Chemical reaction brainly.com/question/6281756
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According to the Law of Definite Proportions from Dalton's Atomic Theory, each compound is composed of a fixed ratio of each of its individual elements. So, the number of individual elements per 1 particle of that compound is represented by the subscripts. The answers are as follows:
Table sugar: 12 atoms of carbon, 22 atoms of hydrogen; 11 atoms of oxygen; 45 total atoms
Marble: 1 atom of calcium, 1 atom of carbon; 3 atoms of oxygen; 5 total atoms
Natural gas: 1 atom of carbon, 4 atoms of hydrogen; 5 total atoms
Rubbing alcohol: 3 atoms of carbon, 8 atoms of hydrogen; 1 atom of oxygen; 12 total atoms
Table sugar: 1 atom of silicon; 2 atoms of oxygen; 3 total atoms
