None. As emphasized, a hospice only aims at simple measures to provide comfort and symptom relief from pain etc. No life prolonging procedure will be done.
The entire ethos of a Hospice is to make the patient very comfortable so that he or she can face their end peacefully. All required medications will be given to ensure pain control.
It cannot be predicted. It could be anywhere between a few days to a few weeks. It is also possible that patients can be taken home once they are stabilized in the Hospice.