Final answer:
The weight of an empty PAC3 missile canister is approximately 9000 lbs or 4.5 tons.
Step-by-step explanation:
The weight of an EMPTY PAC3 missile canister can be estimated using the given information. According to the reference, the fuel for the missiles weighs 5 times the total weight of the warheads, and the mass of the 10 warheads is about 1500 lbs. If we assume the fuel weighs 5 times the weight of the warheads (5 * 1500 = 7500 lbs), then the missile would weigh approximately 9000 lbs or 4.5 tons.