We calculated distance with our calculator and with the help of International map agencies and distance between Sofia and Srebrenica is 120 km.
If you go from Sofia to Srebrenica, with normal traffic conditions and non-stop driving, you reach final destination in 1,5 hours.
Depend on car conditions and fuel quality, to travel from Sofia to Srebrenica with car transport, you need 7 gallons gallons of petrol, which will cost around 10 $ with average prices.