How much more acidic is a solution with a ph of 2 than one with a ph of 6? how much more basic is a solution with a ph of 13 than one with a ph of 10?

The pH scale is in terms of a logarithmic scale, so as you go down on the pH scale, the acidity increases by a power of ten. So since 6 is 4 away from 2, 10 to the fourth power is 10000 meaning a solution with a pH of 2 is 10000 times more acidic than one with a pH of 6.It is backwards for basic. As you go up on the pH scale, it increases by a power of ten. So a pH of 13 is 1000 more basic than a pH of 10

Moles = mass/molar mass the molar mass of c20 = 12.011*20 = 240.22 g per mole therefore, the number of moles is 20 g / 240.22 g per mol = 0.0833 moles.