Answer
See the answer below.
Work Step by Step
a) A sample of an ideal gas was initially under a pressure of 2 atm when its volume is 300 cm$^3$. It then undergoes an isothermal process where its final volume is 100 cm$^3$. Find its final pressure.
b) See the figure below.
c) The final pressure is given by
$$P_2=3\times 2=\color{red}{\bf 6}\;\rm atm$$
