The density of cork is 0.24 g/cm3. what is the volume of a 240-gram piece of cork?

Can someone explain to me how to do this problem ?

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.