How much do a DC-9's wings weigh? How much do the wings weigh?  How much does the landing gear weigh? How much fuel does it take to fill the tanks? We, at Confederation College are trying to donate a DC-9 for training purposes and require information to facilitate this.
From this answer, for the DC9-10 variant:


the wing group weighs 9470 lbs
the landing gear weighs 3660 lbs


Wikipedia mentions the fuel weight as 24,743 lbs.

For other variants, scale the wing and landing gear weights up with the ratio of Empty Weights found on Wikipedia.