A. ta có CTHH: \(S^{IV}_xO_y^{II}\)
\(\rightarrow IV.x=II.y\rightarrow\dfrac{x}{y}=\dfrac{II}{IV}=\dfrac{1}{2}\rightarrow\left\{{}\begin{matrix}x=1\\y=2\end{matrix}\right.\)
\(\rightarrow CTHH:SO_2\)
B. ta có CTHH: \(Fe^{II}_x\left(NO_3\right)^I_y\)
\(\rightarrow II.x=I.y\rightarrow\dfrac{x}{y}=\dfrac{I}{II}=\dfrac{1}{2}\rightarrow\left\{{}\begin{matrix}x=1\\y=2\end{matrix}\right.\)
\(\rightarrow CTHH:Fe\left(NO_3\right)_2\)
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