Q: Can a married woman stay the night at her (married) sister's house, without her husband's permission?

Q: I want to find out about inheritance on a will. I am married Islamically and had to get court married due to my work (company benefits). I am drafting a will and wanted to find out. I purchased a house before marriage, is it permissible to state on the will the house is half mines and half my wife's. And what are the inheritance percentages for my mother my brother and 2 sisters. I only have my wife and daughter that inherit from me as well. Can the percentages be given for all.

Q: On returning from hajj, many people’s Zam-zam did not arrive. Thereafter, when we reported the missing Zam-zam, the airport authorities gave us bottles of Zam-zam equal to the number that we were supposed to receive. However, the Zam-zam they gave us is not ours, and a few bottles have other people’s details on them. 

It seems that the airport authorities are giving random bottles of Zam-zam to random people who claim Zam-zam. Is it permissible for me to keep the Zam-zam they gave me?

Q: Which one is the shahada? Is it “lā ʾilāha ʾillā llāh muḥammadun rasūlu llāh” or the sentence in tashahhud “Ash-hadu an laa ilaaha ill-Allaah wa ash-hadu anna Muhammadan ‘abduhu wa rasooluh”? I thought they are the same but not sure. Which one should a new Muslim or a one out of Islam to say to become Muslim? 

Q: I read somewhere that you cannot lift your foot in prayer and it invalidates the prayer. But when I stand up from the sitting or prostration posture, I need to adjust my feet so that I am again facing qibla directly (my body seems to be a bit lost of the previous position). I heard it invalidates prayer. Hence if I am very slightly not facing qibla, I would just not lift my feet to adjust it. What should I do? 

Q: Does purposely spitting inside the musjid and spreading it with one's hand so that its dried fast and others may not notice, is this kufr?

Q: We want to name our baby boy, Alif Taseen. But we are confused about how to spell it correctly! Should it be "Aleef Taseen" or "Alif Taseen" which is more correct?

Q: Is it permissible for a women to remove her sideburns?

Q: I'm a computer scientist and in my learning and use, there are often libraries of codes which are very popular and heavily used. They often contain a lot of math or pre built software. The problem is that the library sometimes might have a haram name like jupyter, greek mythology names much like the names of several planets. What should a Muslim to do in this situation?

Q: We find it is becoming common for people to hire cold rooms, refrigerated trucks or trailers for Eid. These equipments are hired out to anyone and have most likely been used for haraam meat before.

1. Could this cause contamination although the meat is not being stored in it at the same time as the haraam meat?

2. How should one go about cleaning the equipment prior to using? Is there a specific manner and specific number of times in which it should be cleaned?