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प्रश्न
Define the term:
Avogadro’s number
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उत्तर
Avogadro’s number is defined as the number of atoms present in 12g of 6C12 isotope i.e. 6.023 × 1023 atoms.
संबंधित प्रश्न
Calculate the molar mass of the following substance:
Phosphorus molecule, P4 (atomic mass of phosphorus = 31)
A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure
1) Find the number of moles of hydrogen present.
2) What weight of CO2 can the cylinder hold under similar conditions of temperature and pressure? (H = 1, C = 12, O = 16)
3) If the number of molecules of hydrogen in the cylinder is X, calculate the number of CO2 molecules in the cylinder under the same conditions of temperature and pressure.
4) State the law that helped you to arrive at the above result.
How many moles are 3.6 g of water ?
How many atoms are there in 0.25 mole of hydrogen ?
How many moles of oxygen atoms are present in one mole of the following compounds ?
- Al2O3
- CO2
- Cl2O7
- H2SO4
- Al2(SO4)3
Calculate the number of molecules in 12.8g of sulphur dioxide gas. Take Avogadro's number as 6 x 1023.
[S = 32, 0 = 16 ]
Calculate the number of atoms in the following:
52 g of He
The molecular formula for elemental sulphur is S8. In a sample of 5.12 g of sulphur:
How many moles of sulphur are present?
Calculate the number of moles in 7g of nitrogen.
What is Molar volume of a gas?
