在一定温度下,一定体积的密闭容器中有如下平衡:\(\rm{H_{2}(g)+I_{2}(g)⇌2HI(g).}\)已知\(\rm{H_{2}}\)和\(\rm{I_{2}}\)的起始浓度均为\(\rm{0.10mol⋅L^{-1}}\)时,达平衡时\(\rm{HI}\)的浓度为\(\rm{0.16mol⋅L^{-1}.}\)若\(\rm{H_{2}}\)和\(\rm{I_{2}}\)的起始浓度均变为\(\rm{0.20mol⋅L^{-1}}\),则平衡时\(\rm{H_{2}}\)的浓度\(\rm{(mol⋅L^{-1})}\)是\(\rm{(}\) \(\rm{)}\)