Classify each of the following as either macroscopic, microscopic or particulate: a. a red blood cell.
b. a sugar molecule.
c. baking powder.

Red blood cell is microscopic structure

Mercury atom is particulate

Liquid mercury is macroscopic

Explanation:

The three levels of organization is microscopic, macroscopic and particulate. The substances that can be seen by naked eyes is Macroscopic structures.

Example: Liquid mercury as it can be seen through naked eyes.

A mercury atom is a particulate matter which has not been sees by eyes or it can only be seen by electron microscope.

Red blood cells are very tiny and can be seen only in microscope.

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.

what's the