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प्रश्न
Samples of the gases O2, N2, CO2 and CO under the same conditions of temperature and pressure contain the same number of molecules x. The molecules of oxygen occupy V litres and have a mass of 8 g under the same conditions of temperature and pressure.
What is the volume occupied by:
- x molecules of N2,
- 3x molecules of CO,
- What is the mass of CO2 in grams?
- In answering the above questions, which law have you used?
उत्तर
Equal vols. of all gases under similar conditions of temperature and pressure occupy equal number of molecules.
(a) x molecules of nitrogen occupies vol. = V litres
(b) 3x molecules of CO gas occupy vol = 3 V litres
(c) x molecules of O2 = `8/32= 1/4` molecule of O2
∴ x molecules of CO2 = `1/4` molecule of CO2
∴ Mass of CO2 present in the sample = `1/4 xx "gram molecular mass of CO"_2`
= `1/4 xx 44`
= 11 g
(d) Avogadro's Law.
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संबंधित प्रश्न
If 150 cc of gas A contains X molecules, how many molecules of gas B will be present in 75 cc of B?. The gases A and B are under the same conditions of temperature and pressure.
Name the law om which same conditions of temperature and pressure
State: Avogadro's law
What are the main applications of Avogadro's law?
A vessel contains N molecules of oxygen at a certain temperature and pressure. How many molecules of sulphur dioxide can the vessel accommodate at the same temperature and pressure?
State : Avogadro's law
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 |
What are the main applications of Avogadro's Law?
Calculate :
The weight of 1022 atoms of carbon [C = 12, Avogadro’s No. = `6xx10^23 ]`
The gases hydrogen, oxygen, carbon dioxide, sulphur dioxide, and chlorine are arranged in order of their increasing relative molecular masses. Given 8 g of each gas at STP, which gas will contain the least number of molecules and which gas the most?
