Acertain printed page has an average of 25 words per square inch of paper. the
average length of the words is 5.3 letters. what is the average number of letters per
square centimeter of paper? ( 1 in = 6.45 cm)

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.