Calculate the ph of 0.63 m nh3 (kb=1.8×10−5).

[OH-] = √1.8*10^-5 * 0.15
[OH-] = 1.64*10^-3M
pOH = -log(1.64*10^-3)
pOH = 2.79
pH = 14 - 2.79
pH = 11.21

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.