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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 10

The value of Avogadro number _____ - Science

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Question

The value of Avogadro number _____

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Solution

The value of Avogadro number 6.023 × 1023/mol.

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Fundamental Laws of Gases - Avogadro’s Law
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Chapter 3: Thermal Physics - Evaluation [Page 39]

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Samacheer Kalvi Science [English] Class 10 SSLC TN Board
Chapter 3 Thermal Physics
Evaluation | Q II. 1. | Page 39

RELATED QUESTIONS

A gas cylinder contains 12 x 1024 molecules of oxygen gas.

If Avogadro’s number is 6 x 1023; Calculate:

1)The mass of oxygen present in the cylinder.

2) The volume of oxygen at S.T.P. present in the cylinder. [O = 16]


State Avogadro's Law.


State: Avogadro's law


Choose the correct alternative :
The gas laws which relates the volume of a gas to the number of molecules of the gas is :


A gas cylinder contains 24 × 1024 molecules of nitrogen gas. If Avogadro's number is 6 × 1023 and the relative atomic mass of nitrogen is 14, calculate the mass of nitrogen gas in the cylinder.


Calculate the mass of 1022 atoms of sulphur.

[Atomic mass: S = 32, C = 12 and O = 16 and Avogadro's number = 6 × 1023]


Solve the following:

A vessel contains X number of molecules of hydrogen gas at a certain temperature and pressure. How many molecules of nitrogen gas would be present in the same vessel under the same conditions of temperature and pressure?


State Avogadro's Law


Explain Why?

"The number of atoms in a certain volume of hydrogen is twice the number of atoms in the same volume of helium at the same temperature and pressure."


The gases chlorine, nitrogen, ammonia and sulphur dioxide are collected under the same conditions of temperature and pressure. The following table gives the volumes of gases collected and the number of molecules (x) in 20 litres of nitrogen. You are to complete the table giving the number of molecules in the other gases in terms of x.

Gas Volume (in litres) Number of molecules
Chlorine 10  x
Nitrogen 20
Ammonia 20
Sulphur dioxide 5

Define or explain the term

Avogadro's number


What are the main applications of Avogadro's Law?


How dose Avogadro's Law explain Gay-Lussac's Law of combining volumes?


Calculate :

The weight of 1022 atoms of carbon   [C = 12, Avogadro’s No. = `6xx10^23 ]`


State the atomicity of Sulphur.


You have collected

  1. 2 litres of CO2
  2. 3 litres of chlorine
  3. 5 litres of hydrogen
  4. 4 litres of nitrogen and
  5. 1 litre of SO2

under similar conditions of temperature and pressure. Which gas sample will have the least number of molecules? Justify your answers.


A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure. If the number of molecules of hydrogen in the cylinder is X, calculate the number of carbon dioxide molecules in the cylinder. State the law that helped you to arrive at the result.


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