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The number of atoms in 0.1 mole of a triatomic gas is _______. (NA = 6.02 x 1023 mol-1)

(A) 1.800 x 1022 

(B) 6.026 x 1022 

(C) 1.806 x 1023 

(D) 3.600 x 1023

1 Answer

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Best answer

Correct option: (C) 1.806 x 1023 

Number of atoms

= 0.1 x NA x 3 (∴ It’s a triatomic gas)

= 6.02 x 1022 x 3

= 18.06 x 1022

= 1.806 x 1023

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