1. How many moles of tin are needed to react with 3.5 moles of hydrogen fluoride?

Ithink that the answer is b

What are the statements?

Try adding 700% because of the x in y

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