A、2.7³10-3g/L
B、1.5³10-3g/L
C、5.5³10-3g/L
D、6.5³10-3g/L
ABaCrO4水解后再溶解;
BBaCrO4在强酸中先氧化水,然后再溶解;
C由于2CrO42-+2H+===Cr2O72-+H2O反应,而BaCr2O7溶于水;
D以上理由都不是
从供选择的答案中,选出最确切的解答。
NAC's (Network Access Control) role is to restrict network access to only compliant endpoints and(1)users. However, NAC is not a complete LAN(2)solution, additional proactive and(3)security measures must be implemented. Nevis is the first and only comprehensive LAN security solution that combines deep security processing of every packet at 10 Gbps, ensuring a high level of security plus application availability and performance. Nevis integrates NAC as the first line of LAN security(4). In addition to NAC, enterprises need to implement role-based network access control as well as critical proactive security measures—real-time, multilevel(5)inspection and microsecond threat containment.
在)=0.10mol·L-1的溶液中,Ag2CrO4的溶解度S/mol·L-1等于:
某可逆反应在某温度时的
=1.0。若A物质初始浓度为1.0mol·L-1,B、C物质的浓度为零,则平衡时B的浓度为0.8mol·L-1。( )
测定水溶液中F-含量时,加入的缓冲试剂的组成为:(1)1 mol·L-1的______,使溶液保持较大且稳定的离子强度;(2)0.25 mol·L-1的______和0.75 mol·L-1的______,使溶液pH在5左右;(3)0.001 mol·L-1的______,掩蔽______等干扰离子。
在0.1 mol?L-1KCl溶液中,1.00×10-41mol?L-1的Cd2+与不同浓度的A-所形成的配离子,其可逆极谱波的半波电位值如下: