Should one fulfill his vow of donating an animal to the poor and needy with one sheep although he had repeated the vow several times?
Each vow has to be fulfilled, and repeating the words of the same vow for confirmation renders its fulfillment obligatory as one vow. As for multiple vows, they have to be fulfilled as well.
Is Zakah due on a woman`s saved gold?
Zakah(obligatory charity) is due on saved gold if it reached Nissab(minimum amount liable for Zakah), and a lunar year had lapsed over owning it. The due Zakah is (2.5%).
What is the semi-circular structure abutting the Holy Kabah?
It is the Black Stone of the Holy Kabah, and one should pass from behind it while offering Tawaf(circumambulation) because it is part of the Kabah.
Is it permissible for a woman to uncover her face while performing Umrah(minor Hajj)?
The woman who is in a state of Ihram(ritual consecration) should uncover her face and hands, but it is permissible for her to let her head-covering garment drape from her head down over her face when non-Mahram (i.e., marriageable) men pass by her.