\(CT:S_xO_y\)
\(\%S=\dfrac{32x}{32x+16y}\cdot100\%=40\%\)
\(\Rightarrow32x+16y=80x\)
\(\Rightarrow48x=16y\)
\(\Rightarrow\dfrac{x}{y}=\dfrac{1}{3}\)
\(SO_3\)
Lưu huỳnh hóa trị : VI
Đặt CTTQ : SxOy (x,y : nguyên, dương)
Ta có:
\(\dfrac{32x}{40\%}=\dfrac{16y}{60\%}\\ \Leftrightarrow80x=\dfrac{80}{3}y\\ \Leftrightarrow\dfrac{x}{y}=\dfrac{\dfrac{80}{3}}{80}=\dfrac{1}{3}\)
Vậy: x=1; y=3 => CTHH : SO3 (Lưu huỳnh trioxit)