Density is defined as the mass of a substance divided by its volume, or D=M/V. Calculate the volume of 119.9 grams of a substance that has a density of 0.8 g/mL

Aquantity of that isotope to decay to 1/2 of  its original value

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

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