Question

the no.of atoms in 0.1 mol of a tetraatomic gas is (NA =6.022 ×10^33

Answer 1

tetraatomic has 3 atoms
so, 0.1 mol of 3 atoms = 3 x 0.1 x NA
= 0.3 xNA

$1.806 \times {10}^{23}$

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