【简答题】In order to grow, to travel new roads, people need to have a willingness to take risks, to confront the unknown, and to accept the possibility that they may “fail” at first. How we see ourselves as we...
【简答题】Potassium dichromate and potassium permanganate have over lapping absorption spectra in 1mol·L -1 H 2 SO 4 . K 2 Cr 2 O 7 has an absorption maximum at 440nm,and KMnO 4 has a band at 545nm. A mixture i...