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16. Assign oxidation numbers to each element in the compound. Type your answers in the space below. Make sure to identify if each is positive or negative.
KNO3
17. Metal alloys are materials used for building strong, sturdy structures; however, exposure to outside elements over time can weaken them. Explain WHAT happens and HOW this happens.
18. How can we maintain the integrity of metal objects and prevent corrosion?
19. Compare and contrast voltaic versus electrolytic cells.

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.