1. Compare the intensity of an earthquake that measures 4.0 on the Richter scale to the intensity of an earthquake that measures 2.0 on the Richter scale by finding the ratio of the larger intensity to the smaller intensity.

? : 1

2.A solution has a hydronium-ion concentration of about 3.84 10¹¹ mole per liter. Determine the pH of the solution, and state whether the solution is an acid or a base. (Round your answer to one decimal place.)

pH =