In 1933, work by Irène and Frédéric Joliot-Curie proved Einstein’s prediction. They produced: A. the first working model of a nuclear bomb. B. produced an x-ray crystallography image of a nucleus. C. produced a photograph that showed the creation of two particles when a particle of light was destroyed. D. an equation to calculate the fusion reaction inside a star.

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.