When copper reacts with silver nitrate it produces pure silver and copper(II) nitrate. What mass of copper reacts with 11.79 grams of silver nitrate to produce 10.82
grams of pure silver and 18.97 grams of copper(II) nitrate.
*Round your answer to 2 decimal places.

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.