0.1mol·L¯1 的Na2S溶液中,下面说法正确的是
将22.4L某气态氮氧化合物与足量的灼热铜粉完全反应后,气体体积11.2L(体积均在相同条件下测定),则该氮氧化合物的化学式为
在一定温度下,反应 1/2 H 2 (g)+1/2 X 2 (g) HX(g) 的平衡常数为10。若将1.0 mol 的 HX(g) 通入体积为1.0 L 的密闭容器中,在该温度时 HX(g) 的最大分解率接近于
Now that we’ve discussed our problem, are people happy with the decisions _______?
Everybody was touched _____ words after they heard her moving story.
One of the most important questions they had to consider was _____ of public health.