An expandable balloon contains 1800 L of He at 0.883 atm pressure and 25 ºC. At an altitude of 22 miles (temperature 2.6 ºC and pressure 2.8 torr), what will the volume of the balloon be?

Does the number of ions in solution increase, decrease, or remain constant? it continuously decreases. it continuously increases. it decreases at first, then increases. it increases at first, then decreases.