Question

The number of atom in 0.1 mole of a tetraatomic gas

Answer 1

no of atoms in it = no of moles * NA * no of atoms in one molecule 

Answer 2

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→Tetra -atomic gas , it means in one molecule of gas equal 4 atoms of gas.

hence,

→No of mole of atoms = 4 × no of mole of molecule

→No of mole of atoms = 4 × 0.1 = 0.4

→No of atoms = no of mole × NA

→No of atoms = 0.4 × 6.023 × 10²³

→No of atoms = 2.4092 × 10²³