Ruling on woman being imaam for men
Question

                In Islam, can a woman be an imaam in a mosque? What are the conditions for a woman to be an imaam?
Praise be to Allah.It
      is not permissible for a woman to lead men in prayer. The Prophet 
      (peace and blessings of Allaah be upon him) said: “Keep women behind [in
      the back rows] as Allaah has commanded.” (Narrated by ‘Abd al-Razzaaq
      in his Musannaf, 5115. The
      isnaad stops at Ibn Mas’ood with a longer report than this; the isnaad
      is saheeh but it is not proven that this was said by the Prophet 
      (peace and blessings of Allaah be upon him)).
      
      
      Moreover,
      the position of imaam in the mosque is a kind of wilaayah [public office],
      and wilaayah is only for men. “No nation prospers that appoints a woman
      over its affairs [wilaayah]” (narrated by al-Bukhaari, 13/45, 46), as
      the Prophet  (peace and blessings of Allaah be upon him) said.
      
      There
      is an exception made by the Hanbalis, but this is a weak opinion. This
      view says that a woman may lead the men in taraaweeh if she reads well and
      the men present are illiterate, but she should be behind them and they
      should be in front of her. But there is no evidence (daleel) to support
      this view. The point is that it is not permissible for a woman to lead men
      in prayer. Yes, women may lead other women in prayer, it is OK if she
      leads other women. This is fine, as stated in the report of Umm Waraqah
      leading some of her mahrams, but as for her leading non-mahram men or as a
      public office [wilaayah], such as being an imaam in a mosque, this is not
      permitted.