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One mole of carbon atom weighs 12 g, the number of atoms in it is equal to, (Mass of carbon-12 is 1.9926 × 10–23 g)

(1) 6.022 × 1023

(2) 1.2 × 1023

(3) 6.022 × 1022

(4) 12 × 1022

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Best answer

Answer - (1) 6.022 × 1023

 

Solution - 

no. of particles = $12\over1.9926 × 10^{–23}$

                         = 6.022 × 1023

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