Which of the following are true of ozone in the atmosphere? Choose all that apply. A. It is like the Earth’s sunblock. It provides a layer in the atmosphere that absorbs most of the harmful UV radiation that comes from the Sun, which allowed living organisms to colonize the land surfaces of the Earth. B. It is made of two oxygen atoms bonded together (O2). C. It is used by living organisms for respiration, the process in which food is broken down to release the energy that living things need to perform all bodily functions. D. It is made of three oxygen atoms bonded together (O3).

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.

i think it's c. i'm not sure but i think so.

може ли да зареждате повече информация, моля