Which tool is used to measure a single, specific volume of liquid? a beaker a graduated cylinder a buret a volumetric flask

Single specific volume of liquid are usually measured in the laboratory by mean of VOLUMETRIC FLASK.

Volumetric flasks is a laboratory glassware that has been calibrated to hold a specific and precise amount of liquid at certain temperature and pressure. Volumetric flask are typically utilized for preparation of standard solution and dilution of solutions. The glassware usually comes in various sizes and it has a round bottom and a long neck.

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.

fe 55.85 g/mol and h2o 18.02 g/mol.