Chọn hệ số bằng chữ để hoàn thành các PTPƯ sau:
1. FexOy + H2-> Fe + H2O
2. CxHy + O2 ->CO2 + H2O
3. ZnxOy + CO ->Zn + CO2
4. CxHyOz + O2 ->CO2 + H2O
5. CnH2n + O2 ->CO2 + H2O
6. CnH2n + 2 + O2-> CO2 + H2O
Chọn hệ số bằng chữ để hoàn thành các PTPƯ sau: 1. FexOy + H2-> Fe + H2O 2. CxHy + O2 ->CO2 + H2O 3. ZnxOy + CO ->Zn + CO2 4. CxHyOz + O2 ->CO2 + H2O
By Peyton
\(\begin{array}{l}
1)F{e_x}{O_y} + y{H_2} \to xFe + y{H_2}O\\
2)2{C_x}{H_y} + (\frac{{4x + y}}{2}){O_2} \to 2xC{O_2} + y{H_2}O\\
3)Z{n_x}{O_y} + yCO \to xZn + yC{O_2}\\
4)2{C_x}{H_y}{O_z} + (\frac{{4x + y – 2z}}{2}){O_2} \to 2C{O_2} + y{H_2}O\\
5){C_n}{H_{2n}} + \frac{{3n}}{2}{O_2} \to nC{O_2} + n{H_2}O\\
6){C_n}{H_{2n + 2}} + \frac{{3n + 1}}{2}{O_2} \to nC{O_2} + (n + 1){H_2}O
\end{array}\)
Đáp án:
1. $Fe_xO_y+yH_2\to xFe+yH_2O$
2. $C_xH_y+\bigg(x+\dfrac y4\bigg)O_2\to xCO_2+\dfrac y2H_2O$
3. $Zn_xO_y+yCO\to xZn+ yCO_2$
4. $C_xH_yOz+\bigg(x+\dfrac y4-\dfrac z2\bigg)O_2\to xCO_2+\dfrac y2H_2O$
$5){C_n}{H_{2n}} + \dfrac{{3n}}{2}{O_2} \to nC{O_2} + n{H_2}O\\ 6){C_n}{H_{2n + 2}} + \bigg(\dfrac{{3n + 1}}{2}\bigg){O_2} \to nC{O_2} + (n + 1){H_2}O$