Question

2. Is it possible for a balloon with an initial internal pressure equal to 250.0 kPa to naturally expand to four times its initial volume when the temperature remains constant and atmospheric pressure is 101.3 kPa?,

Answer 1

No
Consider the formula: PV=nRT
when one goes up, the other goes down because they are indirectly proportional

240+101.3=341.3kPa absolute pressure.
341.3 * V = constant
expansion = Vfinal / Vinit = 341.3 / 240

It is not enough.

To get a four times expansion, we need both a weakening of the balloon material and an ambient pressure that is lower than atmospheric at sea leve