Which law states that the volume and absolute temperature of a fixed quantity of gas are directly proportional under constant
pressure conditions?
Boyle's law
Charles's law
Dalton's law
Gay-Lussac's law

The answer is Charles law

Charles's law

Explanation:

Charles' law gives a relationship between volume and absolute temperature at constant pressure. It's thus, states that the volume of a fixed mass of gas is directly proportional to its absolute temperature provided the pressure remains constant. Mathematically,

V & T

V = KT

K = V/ T

V1/T1 = V2/T2

Where

V1 is initial volume.

V2 is the final volume.

T1 is the initial temperature in Kelvin

T2 is the final temperature in Kelvin.

it means there are 3 atoms of oxygen

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.