【单选题】25°C 时水的饱和蒸汽压为 3.17kPa ,液态水的生成吉布斯自由能 Δ f G m θ (H 2 O, l , 298.15K) = -237.19kJ . mol -1 ,则水蒸气的生成吉布斯自由能 Δ f G m θ (H 2 O, g, 298.15K) 为( ) kJ . mol -1 。
【单选题】建设工程委托监理合同示范文本由《工程建设委托监理合同》、《建设工程委托监理合同标准条件》和( )组成。
【判断题】No one should enter into it slightly more selfishly not reverently and responsibly in the sight of Almighty God. (1.0分)A. √ B. ╳
【简答题】reverently ____________ v.
【简答题】You do not kill, because meditation and wisdom have given you ____for life. (reverently)
【判断题】No one should enter into a slightly more selfishly not reverently and responsibly in the sight of Almighty God. (1.0分)A. √ B. ╳
【多选题】25 °C 时 , 下列有关溶液中微粒的物质的量浓度关系正确的是 ( )
A.
向饱和氯水中加入 NaOH 溶液至 pH=7 , 所得溶液中 : c (Na + )> c (ClO - )> c (Cl - )> c (OH - )
B.
向饱和氯水中加入 NaOH 溶液至 pH=7 , 所得溶液中 : c (Na + )> c (ClO - )> c (Cl - )> c (OH - ) 0.1 mol · L -1 NH 4 HSO 4 溶液与 0.1 mol · L -1 NaOH 溶液等体积混合 : c (S O 4 2- )= c (Na + )> c (NH 4 + )> c (H + )> c (OH - )
C.
0.2 mol · L -1 NaHCO 3 溶液与 0.1 mol · L -1 NaOH 溶液等体积混合 : 2 c (H + )+ c ( CO 3 2- )+3 c (H 2 CO 3 )>2 c (OH - )+ c (H CO 3 - )
D.
0.1 mol · L -1 HCN 溶液与 0.05 mol · L -1 NaOH 溶液等体积混合 (pH>7) : c (H + )+ c (HCN)> c (OH - )+ c (CN - )