`#3107.101107`
`a)`
Gọi CT chung: \(\text{C}_{\text{ x}}\text{ S}_{\text{ y}}\)
Theo quy tắc hóa trị: \(\text{IV.x = II.y }\rightarrow\text{ }\dfrac{x}{y}=\dfrac{\text{II}}{\text{IV}}=\dfrac{1}{2}\)
\(\Rightarrow x=1,y=2\)
\(\Rightarrow\text{ CTHH: CO}_2\)
`b)`
Gọi CT chung: \(\text{Fe}_{\text{ x}}\text{ O}_{\text{ y}}\)
Theo quy tắc hóa trị: \(\text{II.x = II.y }\rightarrow\text{ }\dfrac{x}{y}=\dfrac{\text{II}}{\text{II}}=\dfrac{1}{1}\)
\(\Rightarrow x=1;y=1\)
\(\Rightarrow\text{ CTHH: FeO}\)
`c)`
Gọi CT chung: \(\text{P}_{\text{x}}\text{ O}_{\text{ y}}\)
Theo quy tắc hóa trị: \(\text{V.x = II.y }\rightarrow\text{ }\dfrac{x}{y}=\dfrac{\text{II}}{\text{V}}\)
\(\Rightarrow x=2;y=5\)
\(\Rightarrow\text{ CTHH: P}_2\text{O}_5\)
`d)`
Gọi CT chung: \(\text{N}_{\text{ x}}\text{O}_{\text{y}}\)
Theo quy tắc hóa trị: \(\text{V.x = II.y }\rightarrow\text{ }\dfrac{x}{y}=\dfrac{\text{II}}{\text{V}}\)
`=> x = 2; y = 5`
`=>`\(\text{CTHH: N}_2\text{O}_5.\)
a) C (IV) và S (II): \( \text{CS}_2 \)
b) Fe (II) và O: \( \text{FeO} \)
c) P (V) và O: \( \text{P}_2\text{O}_5 \)
d) N (V) và O: \( \text{N}_2\text{O}_5 \)
