Who used scientific investigations to study atoms? Check all that apply. Dalton
Democritus
Rutherford
Thomson

Answers: Dalton, Rutherford, and Thomson.
(A, C, D on edge 2021)

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

it is thermal conduction according to apex : )