Question

Benadryl is an over-the-counter drug used to treat allergy symptoms. The formula of Benadryl is C17H21NO.How many moles of C are present in 0.706 moles of Benadryl? Express your answer to three significant figures and include the appropriate units

Answer 1

Ans. 1 mol Benadryl consists of 17 mole of C-atoms.

So,

            Total moles of C-atoms = 17 x moles of Benadryl

                                                  = 17 x 0.706 mol = 12.002 mol

Now,

            No. of C-atoms = Moles of C-atoms x Avogadro number

                                     = 12.002 mol x 6.022 x 10¹² atoms mol^-1

                                     = 7.23 x 10²⁴ atoms