. After 24.0 days, 2.00 milligrams of an original 128.0 milligram sampie remain. What is th half -life of the sample ?

The answer is 323 g.

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

A)  it is neutral because the concentration of hydronium ions equals that of hydroxide ions

The correct answer should be a.