CHEMISTRY HIGH SCHOOL

The two forms of oxygen, O2(g) and O3(g), have(1) different molecular structures and identical properties
(2) different molecular structures and different properties
(3) identical molecular structures and identical properties
(4) identical molecular structures and different properties

Answers

Answer 1
Answer: Answer: option (2) different molecular structures and different properties.


Justification:


O₂(g) and O₃(g) are different forms of oxygen in gaseous state. That is what is called allotropes.


Allotropes are forms of the same element, in the same physical state (solid, liquid or gas), that have different structures and different properties.


O₂ (diatomic oxygen) and O₃ (ozone) are both gases at room temperature, but one molecule has 2 atoms and the other has 3 atoms. That make them different in structure and properties.


Another example of allotropes is graphite and diamonds.
Answer 2
Answer:

Answer:

different molecular structures and different properties

Explanation:

The two forms of oxygen, O2(g) and O3(g) have different molecular structures and different properties

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Which reaction type? *combination (synthesis) combustion decomposition single replacement double replacement

What is the role of Sodium thiosulfate used in modified Kjeldahl procedure?

Answers

Sodium thiosulfate is used as a reducing agent in the Kjeldahl procedure. It is used to prevent the interference of certain substances when determining nitrogen content in organic compounds.

During the digestion step of the Kjeldahl procedure, the organic sample is digested with sulfuric acid. This breaks down the organic compounds and converts the nitrogen present into ammonium sulfate. Some models may contain substances that can interfere with the next analysis. This can lead to inaccuracies in the outcomes.

Using sodium thiosulfate in the modified Kjeldahl procedure minimizes interference from certain compounds. The accuracy of the nitrogen determination is improved. This helps us to ensure that the results obtained are correct and instance of the actual nitrogen content in the sample.

To learn more about Nitrogen, visit here:

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Final answer:

The role of Sodium thiosulfate in the modified Kjeldahl procedure is to act as a reducing agent and prevent interference from certain substances, such as nitrites and oxidizing agents, which can affect the accuracy of the nitrogen content determination in organic compounds.

Explanation:

In the modified Kjeldahl procedure, Sodium thiosulfate (Na2S2O3) plays a crucial role as a reducing agent. This procedure is commonly used for the determination of nitrogen content in organic compounds. The addition of Sodium thiosulfate to the reaction mixture serves to prevent interference from certain substances that can react with the reducing agent used in the procedure.

When performing the modified Kjeldahl procedure, it is important to accurately determine the nitrogen content in the sample. However, certain substances, such as nitrites and other oxidizing agents, can interfere with the reaction and affect the accuracy of the results. These interfering substances can react with the reducing agent, leading to inaccurate measurements.

By adding Sodium thiosulfate to the reaction mixture, these interfering substances are neutralized. Sodium thiosulfate acts as a reducing agent, effectively preventing the interference of nitrites and other oxidizing agents. This allows for a more accurate determination of the nitrogen content in the sample.

Learn more about role of sodium thiosulfate in modified kjeldahl procedure here:

brainly.com/question/31503690

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In which type of reaction do two or more substances combine to produce a single substance?(1) synthesis
(2) decomposition
(3) single replacement
(4) double replacement

Answers

The correct answer is option 1. Synthesis reaction is the chemical reaction which involves two or more substances combining to form a single substance. An example is burning magnesium. The balanced reaction is 2Mg + O2 = 2MgO.

The correct answer is (1) Synthesis

Explanation:

In chemistry, synthesis reaction occurs as two or more substance combine and form a single and complex product, due to this, synthesis reaction is also known as a direct combination, because different to decomposition or replacement reactions the final product includes the substances that were combined. For example, water (H2O) is formed through synthesis by mixing two atoms of hydrogen (H2) and one of Oxygen (H) which means the substances combined form a single substance. Thus, the type of reaction described is Synthesis reaction.

Which is the best example of technological design

Answers

Well, actually there are many examples. But, the one i know best is the touch mouse by Microsoft.

How many grams of aluminum chloride are needed to react completely with 1.084g lithium sulfide?

Answers

Molar mass :

Li₂S = 45.947 g/mol

AlCl₃ = 133.34 g/mol

3 Li₂S + 2 AlCl₃ = 6 LiCl + Al₂S₃

3 * 45.947 g Li₂S ----------> 2 * 133.34 g AlCl₃
1.084 g Li₂S ----------------> ?

Mass Li₂S = 1.084 * 2 * 133.34 / 3 * 45.947

Mass Li₂S = 289.08112 / 137.841

Mass Li₂S = 2.0972 g 

hope this helps!

How much heat is absorbed during the reaction of 48.0 grams of O2 with excess nitrogen in the following reaction if ΔH = 68 kJ/mol N2?"

Answers

Chemistry is hard………

Which of the gases listed below would not be collected via water displacement?a. CO₂
b. CH₄
c. O₂
d. NH₃
e. H₂

Answers

D is the answer I do believe
The answer is D) NH3
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