I need help on chemistry, the wording kind of throws be off too.

Which of these will change if the air in aclosed bottle is heated? abcdthe mass of the airthe composition of the airthe air pressure in the bottlethe number of air molecules in the bottle

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.