ASAP HELP What is the pH of a solution with a hydronium ion concentration of 5.6 × 10-7? (pH = -log[H3O+])

A.
5.6

B.
6.25

C.
7.00

D.
14.40

B: 6.25

Step-by-step explanation:

The pH is calculated with the formula pH = - log [H3O+], where [H3O+]  is the concentration of H3O+

=> [H3O+] = 5.6 * 10^ -7.

=> pH = - log (5.6 * 10 ^-7) = 6.25

That is a slightly acid pH, because pH is in the range 0 to 14, and 7 is neutral.

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11

27 + 13x + 15 = (x + 5)( =

step-by-step explanation:

27 + 13x + 15 = (x + 5)( = 27 + 13x + 15 = (x + 5)( = 27 + 13x + 15 = (x + 5)( =