Review the information in the data table. What does this information tell you about the rate of decay reactions relative to the concentration of oxygen?
Object
Location
Concentration of Decay time
oxygen in the air
Very low
5,000 years
Leather pouch
High Alps
Leather purse
Florida
High
30 years
O A. Reactions occur at the same rate regardless of the concentration
of reactants.
B. Reactions occur more slowly when there is less oxygen in the air.
C. More information is needed to compare the rates of decay.
O
D. Reactions occur more slowly when there is more oxygen in the air.

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form() .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.