2000K时反应CO(g)+1/2O2(g)=CO2(g)的Kp为6.443,则在同温度下反应为2CO2(g)=2CO(g)+O2(g)的Kp应为

2000K时反应CO(g)+1/2O2(g)=CO2(g)的Kp为6.443,则在同温度下反应为2CO2(g)=2CO(g)+O2(g)的Kp应为
A.1/6.443
B.(6.443)1/2
C.(1/6.443)2
D.1/(6.443)1/2
正确答案：(1/6.443)2