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प्रश्न
Fill in the following blanks :
A mole represents an .............. number of particles of a substance.
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उत्तर
A mole represents the Avogadro number of particles of a substance.
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संबंधित प्रश्न
If one mole of carbon atoms weighs 12 gram, what is the mass (in gram) of 1 atom of carbon?
Calculate the molar mass of the following substance:
Sulphur molecule, S8
What is the mass of 4 moles of aluminium atoms (Atomic mass of aluminium = 27)?
What is the mass of 0.2 mole of oxygen atoms?
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.
Explain with examples what is meant by a 'mole' of a substance.
Explain the term:
Gram atom
Calculate the number of moles of CO2 which contain 8.00 g of O2
Calculate the number of moles in 1.51 × 1023 molecules of NH4Cl.
Deduce the number of molecules of the following compound in the given quantity.
90g water
