How many cubic meters of gold-bearing rock, which is 3.5% gold by weight, must be processed to produce 5 dollars worth of gold? The density of the rock is 11 g/cm3. The price of gold is $180/ounce.

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.