Gọi CTHH : NxOy
\(\dfrac{14x}{16x}=\dfrac{7}{16}\Rightarrow\dfrac{x}{y}=\dfrac{7}{14}:\dfrac{16}{16}=\dfrac{1}{2}:1=\dfrac{1}{2}.1=\dfrac{1}{2}\)
=> CTHH: NO2
\(CTHH:N_xO_y\\ \dfrac{14x}{16y}=\dfrac{7}{16}\Rightarrow\dfrac{x}{y}=\dfrac{7}{16}:\dfrac{14}{16}=\dfrac{7}{16}.\dfrac{16}{14}=\dfrac{1}{2}\)
\(\Rightarrow\left\{{}\begin{matrix}x=1\\y=2\end{matrix}\right.\)
\(CTHH:NO_2\)