Chọn đáp án đúng

$$\begin{gathered} \mathrm{Số} \mathrm{nguyên} \mathrm{tử} \mathrm{oxi} \mathrm{có} \mathrm{trong} 16\mathrm{gam} \mathrm{oxi} (\mathrm{biết} 1 \mathrm{đvC}=1,66.10-24\mathrm{gam}) \\ \mathrm{A}. 6,02.{10}^{-23} \mathrm{B}. 3,01.{10}^{23} \mathrm{C}. 12,04.{10}^{23} \mathrm{D}. 6,02.{10}^{-24} \end{gathered}$$