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प्रश्न
Calculate the mass of 1022 atoms of sulphur.
[Atomic mass: S = 32, C = 12 and O = 16 and Avogadro's number = 6 × 1023]
उत्तर
6.022 × 1023 atoms of sulphur weight = 32 g
1 atom of sulphur weigh = `32/(6.022 xx 10^23)`
1022 atoms of sulphur weigh = `32/(6.022 xx 10^23) xx 10^22`
= 0.531 g
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संबंधित प्रश्न
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
Define atomicity of a gas.
Samples of the gases O2, N2, CO2 and CO under the same conditions of temperature and pressure contain the same number of molecules represented by X. The molecules of Oxygen, occupy V litres and have a mass of 8 g. Under the same conditions of temperature and pressure:
In answering the above questions, which law have you used?
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."
Calculate :
The weight of 1022 atoms of carbon [C = 12, Avogadro’s No. = `6xx10^23 ]`
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?
What is the co-efficient of real expansion?
State the atomicity of Sulphur.
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.
