1. A balloon filled with helium gas has a volume of 600 mL at a pressure of 1 atm. The balloon is released upward, where the pressure is 0.4 atm. If the temperature has remained the same,
what volume does the gas occupy at this height? * 5

Ibelieve the answer is d. bleachhope my answer has you : )

Answer:             1.0  × 10⁻⁵ msolution:                     as we know ph is given as,                                    ph  = -log [h⁺]and,                                    [h⁺]  =  10^-ph    (1)putting value of ph in eq. 1,                                    [h⁺]  =  10⁻⁵                                    [h⁺]  =  1.0  × 10⁻⁵ m