Answer to Question #163368 in General Chemistry for Laurence

Question

How many molecules of nicotine, C10H₁₄N₂, are absorbed by someone who smokes 12 cigarettes a day? For each cigarette smoked 0.95mg of nicotine is absorbed

Answer 1

12 cigarettes contains (12 x 0.95)mg = 11.4 mg = 0.0114 g of nicotine. so number of moles of nicotine absorbed = 0.0114/162.2316 = 0.0000702699

As 1mole of nicotine contains 6.023 x 10²³ number of molecules, so 0.0000702699 mole contains (0.0000702699 x 6.023 x 10²³) = 0.0004232356 x 10²³ number of molecules of nicotine.