500 gallons=1892.666 liters
wate=1.1*1892.666=2081.926 kg
Then yu gotta ges how water mix with wotever liquid yu start with
Most kommon assume...it DONT mix, so volume inkreeez bi wotever volume= 10 pounds.
10 pounds=4.535924362kg, so wate after add 10 pounds=2081.926+4.5359=2086.462kg
10 pounds water=4.53592498 liters...1892.666+4.536=1897.202 liters
density=2086.462kg / 1897.202 liters=1.0997574