CO2+2NaOH→Na2CO3+H2O H2S+2NaOH→Na2S+2H2O为()的方程式。
Since accumulations of H2S gas on a ship can be dangerous to personnel,it is important to know that H2S gas is().
硫化氢H2S具有()性。
已知反应:(1)H2(g)+S(s)⇋H2S(g),其平衡常数为K1ϴ,(2)S(s)+O2(g)⇋SO2(g),其平衡常数为K2ϴ,则反应(3)H2(g)+SO2(g)⇋O2(g)+H2S(g)的平衡常数K3ϴ是( )。[2014年真题]
The airborne concentrations of substances (such as H2S) under which nearly all workers may be repeatedly exposed without adverse effects are called().
H2S、KCN、尿素培养基培养物中,只要有()为阳性,则可判定该菌株不是大肠埃希氏菌。
在钻进含H2S地层时,要求钻井液的PH值始终控制在()以上。
H2S、KCN、尿素培养基培养物中,只要有()为阳性,则可判定该菌株不是大肠埃希氏菌。
有油气作业管道和污水设备的地方很容易存有硫化氢气体,化学名H2S它是一种可致命剧毒气体。以下描述错误的是()
For H2S detection,sensitized tapes indicate H2S presence by means of discoloration of an exposed spot on the tape. The shade of the color on the spot depends upon the concentration of H2S and().