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Number of atoms present in one mole of a gas at STP is
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- 6.023 × 1020
- 6.023 × 1023
- 6.023 × 10–23
- 6.023 × 10–20
- 6.023 × 1020
Correct Option: B
A mole of a gas is the amount of a substance containing 6.023 x 1023 atoms. This is known as Avogadro’s number. 1 mole contains the same number of particles as there are in 12 g of carbon-12 atoms by definition. 12 g of carbon-12 atoms = 6.022 x 1023carbon atoms.
