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Answer :
Given, 1 mole of carbon weighs = 12g
1 mole of carbon has \( = 6.022 × 10^{23} \)atoms
i.e., \( 6.022 × 10^{23} \)atom = 12g
So, mass of 1 atom of carbon \( = \) \( 12 \over 6.022 × 10^{23} \) \( = 1.99 × 10^{-23} \)g