Question

what is no. of atoms in 0.1 mole of triatomic gas ?

Answer 1

HEY MATE HERE IS YOUR ANSWER

let us suppose that the molecules (gas) is ozone (O3) which is triatomic.

By the formula
number of atoms=number of moles *avogadro's number*number of atoms in the formula
Number of atoms =0.1*6.02*10^23*3

Hope it will help you
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Answer 2

your answer is in referred attachment