Chem 141 0076 Spring 2018- Exam 2- April 13th 14. What element is being oxidized

Question

Chem 141 0076 Spring 2018- Exam 2- April 13th 14. What element is being oxidized in the following redox reaction? Mn04-(ag) + H20204(aq)-Mn2+(ag) + CO2(g) a. Mn b.? ?.? d. O e. none of the above 15. What element is being reduced in the following redox reaction? CrO) (a)+ClO (ag) - CrO42-(ag)+ CI (ag) a. Cl b. O ?.? d. Cr e. none of the above 16. Heat can be defined as the flow of energy caused by a 17. Three types of energy that are associated with the motion of objects, the temperature of objects, and the relative positions of electrons and nuclei in atoms and molecules are called, respectively a. thermal, kinetic, chemical b. kinetic, thermal, chemical c. kinetic, chemical, thermal d. kinetic, potential, chemical e. nuclear, thermal, atomic f. none of the above 18. The law that states that "energy can be neither created nor destroyed" is the

Explanation / Answer

14) element whose oxidation number rises in reaction is oxidized so as Carbon is changing (+3 to +4 ) option c is correct.

15) element whose oxidation number gets lower is reduced as Cl ( +3 to -1) option a is correct.

16) a temperature difference

17)motion of objects is kinetic

Temperature difference is thermal

Relative position of electron is potential

So none of the above is correct option(f)

18)It is called "the conservation of energy"

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