`@` `\text {Ans}`
`\downarrow`
`a)`
Gọi ct chung: \(\text{Mg}^{\text{II}}_x\text{(NO}_3\text{)}^{\text{I}}_y\)
Theo quy tắc hóa trị: \(\text{II.x = I.y }\rightarrow\dfrac{x}{y}=\dfrac{I}{II}=\dfrac{1}{2}\)
`=> x = 1, y=2`
`=> \text {CTHH: Mg(NO}_3)_2`
`b)`
Gọi ct chung: \(\text{K}^{\text{I}}_x\text{O}^{\text{II}}_{\text{y}}\)
Theo quy tắc hóa trị: \(\text{I.x = II.y }\rightarrow\dfrac{x}{y}=\dfrac{II}{I}=\dfrac{2}{1}\)
`=> x = 2; y = 1`
`=> \text {CTHH: K}_2 \text {O}`
`c)`
Gọi ct chung: \(\text{Ag}^{\text{I}}_{\text{x}}\text{Cl}^{\text{I}}_y\)
Theo quy tắc hóa trị: \(\text{I.x = I. y }\rightarrow\dfrac{x}{y}=\dfrac{I}{I}=\dfrac{1}{1}\)
`=> x=1; y=1`
`=> \text {CTHH: AgCl}`
`@` `\text {Kaizuu lv uuu}`
