Is the prayer of the one praying alone or in congregation while having a piece of candy in their mouth considered valid or not?

What is the ruling of Sharia on loudly greeting those already sitting in the mosque? This is taking into consideration that they return the greeting and this could annoy the prayer performers.

Is it permissible to use Zakah money to cover the expenses of maintaining schools, hospitals, and universities?

I work as an Imam and since I have sustained a back injury, I lead the prayer while sitting on a chair and can`t make ruku or sujud. What is the ruling of Sharia on my prayer and that of those praying behind me?

What are the obligatory conditions for halal slaughtering? Is it permissible to shackle the animal from its hind leg before slaughtering, as practiced by modern slaughterhouses, and then slaughter it while its head is down? It is worth pointing that the animals can`t see other animals being slaughtered. 

What is the ruling of Sharia on singling out Jumu`ah with fasting when it falls on the Day of `Arafah?

I have a serious illness (Extreme dizziness) and it is difficult for me to travel or go out. Is it allowed to delegate someone to do Hajj on my behalf?

We are a team that works on a drilling rig in the Dead Sea area. We work different shifts six days a week. Unfortunately, we can`t stop the rig at prayer time and it moves half a circle left and right. It deviates (45) degrees right and left from the direction of the Qibla, so it becomes impossible for us to pray towards the Qibla because the rig keeps rotating. How can we pray while on this rig?

What is the ruling of Sharia on holding more than one congregation concurrently for the same prayer in the same mosque?

I`m a tradesman and don`t know how to calculate the Zakah due on trading items. Hawl (Zakah year) has lapsed only over some of the goods; some have been damaged and I might return them to the owner. Sometimes, I pay for goods in advance and, sometimes, by installments. I also have money in my bank account, in addition to cash and uncashed checks. Also, people owe me money; some of which are repayable and some are unrepayable. I`m also indebted and have taxes and expenses to pay. I have vehicles, such as cars, trucks and the like, real estate; some are for trade and some aren`t, and some I rent to generate income. This is in addition to my own private money, car and house and other items not set for trade. My wife has also adornment gold, in addition to gold for saving. What is the ruling of Sharia on all of this?

What is the ruling of Sharia on collecting obligatory and voluntary charities in favor of what is called (Poor Female Student Fund) to help needy female students spend on their personal needs, and not their tuition?

Which ruling comes first: Combining prayers during rain or offering each prayer at its prescribed time?

Should the Imam be followed when joining prayers because of rain or this isn`t allowed for the praying person who doesn`t meet the conditions and rules of this concession?

Is joining prayers because of rain from Sunnah?