【单选题】某化合物的浓度为1.0×10^(-5)mol/L,在λmax=380nm时,其透射比为50%,用1.0cm吸收池,则在该波长处的摩尔吸收系数εmax/[L/(mol×cm)]为
【简答题】A.They begin paying federal taxes from that day. B.It is the last day for people to pay the city tax. C.It is the deadline for paying federal taxes. D.The state tax is due on that day.
【单选题】给一个已存在的文件用FileWriter("report")给其写入数据,则结果为?
【单选题】某化合物的浓度为1.0 ×10-5mol/L,在lmax=380nm时, 有透射比为50%, 用25px吸收池, 则在该波长处的摩尔吸收系数emax /[L/(mol×cm)]为( )
【单选题】某化合物的浓度为1.0 ×10-5mol/L,在lmax=380nm时, 有透射比为50%, 用1.0cm吸收池, 则在该波长处的摩尔吸收系数emax /[L/(mol×cm)]为
【单选题】某化合物的浓度为 1.0 × 10 -5 mol/L, 在 l max =380nm 时 , 有透射比为 50%, 用 1.0cm 吸收池 , 则在该波长处的摩尔吸收系数 e max /[L/(mol × cm)] 为