Is the following hypothesis testable? "if i study, i will get a better grade on a test than if i do not study."

Yes

Explanation:

Yes, you can test this by comparing grades you received when you studied and when you did not study

u i forgot the answer?

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.