单项选择题

反应2HgO(s)=2Hg(g)+O2(g) 在101 325Pa、分解温度时的分压p(Hg)等于:()

A.101.325kPa
B.(101.325 /2)kPa
C.(101.325 /3)kPa
D.(2/3)×101.325kPa