Select the correct answer. 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

An alien has just landed from the planet, iksnimak. he would like to leam how to add two fractions when thedenominators are the same. write a paragraph that explains to our alien friend, in your own words, the detailsabout how to add the fractions, how to change the result to a mixed number, and how to reduce the fractionpart. use this problem as your example: the two fractions are 5/8 & 7/8

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?