Final answer:
The charge per kilogram of the substance is 2700 Coulombs.
Step-by-step explanation:
In order to find out how much charge is there in 1 kg of the substance, we need to divide the total charge by the total mass. In this case, the total charge Q is given as 2700 kg. So, to find the charge per kilogram, we divide 2700 kg by 1 kg.
Q per kg = 2700 kg / 1 kg = 2700 C
Therefore, the answer is c) 2700 C.