A thermally insulated 3. 00-L flask contains monatomic xenon gas at an initial temperature of \(50.0^{\circ} \mathrm{C}\) and pressure of \(2.50 \mathrm{~atm}\). You now add enough energy to double the thermal energy of the gas. The mass of a xenon atom is \(2.18 \times 10^{-25} \mathrm{~kg}\).

(a) How many atoms does the flask contain?

(b) How much energy did you add to the flask?

(c) By what factor did you change the root-mean-square speed of the atoms?