You synthesized a brand new liquid compound in your organic chemistry lab and determined it's density to be 1.78g/ml. how could you use this knowledge of your new compound in the future, particularly if you wanted to add .100g of it to your next reaction without using a balance?

Measure the volume of that compound which 56.17 ml for 100 grams of that compound.

Explanation:

Density is defined as mass present in unit volume of the substance .

Density of the new liquid compound = 1.78 g/ml

In future if we wanted to to 100 gram of this compound without measuring its mass on the balance. What we can do is we can calculate its volume which we will require in a reaction with the help of density.

So, instead of measuring the mass of the compound we can directly measure the volume of that compound which 56.17 ml for 100 grams of that compound.

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.