Question

Answer 1

\(CTTQ:N_x^{III}H_y^I\\ \Rightarrow x\cdot III=y\cdot I\Rightarrow\dfrac{x}{y}=\dfrac{1}{3}\Rightarrow x=1;y=3\\ \Rightarrow NH_3\\ CTTQ:P_x^VO_y^{II}\\ \Rightarrow x\cdot V=y\cdot II\Rightarrow\dfrac{x}{y}=\dfrac{2}{5}\Rightarrow x=2;y=5\\ \Rightarrow P_2O_5\\ CTTQ:Fe_x^{III}O_y^{II}\\ \Rightarrow x\cdot III=y\cdot II\Rightarrow\dfrac{x}{y}=\dfrac{2}{3}\Rightarrow x=2;y=3\\ \Rightarrow Fe_2O_3\\ CTTQ:Fe_x^{II}S_y^{II}\\ \Rightarrow x\cdot II=y\cdot II\Rightarrow\dfrac{x}{y}=1\Rightarrow x=1;y=1\\ \Rightarrow FeS\)

Answer 2

11.

a) NH₃

b) P₂O₅

c) Fe₂O₃