Determine the oxidation number (oxidation state) of each element in the compound CuCO 3 . Cu : C : O : Determine the oxidation number of each element in CH 4 . C : H : Determine the oxidation number of each element in IF . I : F : Determine the oxidation number of each element in CH 2 Cl 2 . C : H : Cl : Determine the oxidation number of each element in SO 2 . S : O : Determine the oxidation number of each element in ( NH 4 ) 2 CrO 4 . N : H : Cr : O :

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.

How does a large body of water, such as the ocean, influence climate?

Choose all the answers that apply. fluorine (f) has an atomic number of 9 and an atomic weight of 18.99. fluorine has a. 9 protons b. 10 neutrons c. 18 electrons d. an atomic mass of 19 e. at least one isotope