In the image above, what could you conclude from the pattern of volcanoes around the Pacific Ocean? The Pacific Ocean is a subduction zone from west to east.
Crust is thinnest around the Pacific Ocean.
The Pacific Rim is a huge divergent boundary.
Volcanoes occur at plate boundaries.

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.