Question

Answer 1

\(a,K_x^IO_y^{II}\Rightarrow x\cdot I=y\cdot II\Rightarrow\dfrac{x}{y}=2\Rightarrow x=2;y=1\\ \Rightarrow K_2O\\ PTK_{K_2O}=39\cdot2+16=94\left(đvC\right)\\ b,S_x^{IV}O_y^{II}\Rightarrow x\cdot IV=y\cdot II\Rightarrow\dfrac{x}{y}=\dfrac{1}{2}\Rightarrow x=1;y=2\\ \Rightarrow SO_2\\ PTK_{SO_2}=32+16\cdot2=64\left(đvC\right)\\ c,Zn_x^{II}Al_y^{III}\Rightarrow x\cdot II=y\cdot III\Rightarrow\dfrac{x}{y}=\dfrac{3}{2}\Rightarrow x=3;y=2\\ \Rightarrow Zn_3Al_2\\ PTK_{Zn_3Al_2}=65\cdot3+27\cdot2=249\left(đvC\right)\\ d,Fe_x^{III}Cl_y^I\Rightarrow x\cdot III=y\cdot I\Rightarrow\dfrac{x}{y}=\dfrac{1}{3}\Rightarrow x=1;y=3\\ \Rightarrow FeCl_3\\ PTK_{FeCl_3}=56+35,5\cdot3=162,5\left(đvC\right)\)