Answer: Density = 0.23 tons per cubic meter.
Explanation:
Formula :

1 ton = 32000 ounces
⇒ 1 ounce = 0.00003125 ton
⇒ 7 ounces = 7(0.00003125)= 0.00021875 ton
1 gallon = 0.00378541 cubic meter
2.5 gallons = 0.009475 cubic meter
Density=

Hence, Density = 0.23 tons per cubic meter.