2. What is the longest duration in hours) of sunlit time during the year?
3. What is the shortest duration (in hours) of sunlit time?
4. How does the angle of sunlight striking the ground change?
5. What is the average temperature?
e

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )

answer: option (a) is the correct answer.

explanation:

the measurement of hydrogen ions in a solution is known as ph.

if ph of a solution is less than 7 then the solution is acidic. if ph of a solution is greater than 7 then the solution is basic.

when the ph of a solution equals 7, then the solution is considered as neutral.

the ph of pure water is 7, therefore, it means that concentration of hydronium ions equals that of hydroxide ions.