When sodium metal is treated with water we get gas which is absorbed by palladium metal is ?

Initially, the balloon had 3.0 liters of gas at a pressure of 400 kpa and was at a temperature of 294 k. if the balloon is cooled to 277 k and its volume decreased to 1 l, what will the new pressure in the balloon be?

Hey can you me with this i really need y’all

Is 9 correct? and can someone me with 10? it’s due tomorrow, you