Answer:
Specific gravity of mercury is 13.56 and it is an unit-less quantity.
Step-by-step explanation:
Mass of the mercury = m = 607.0 lb = 275330.344 g
1 lb = 453.592 g
Volume of the mercury = v =


Density of the mercury = d=

d = 13.56 g/mL
Specific gravity of substance = Density of substance ÷ Density of water

Specific gravity of mercury :
(unit-less quantity)