States of Matte...

Which one proposes the basic postulates concerning elements and atoms?

By ideal gas law, find the approximate volume that will be occupied by 0.5 mole of an ideal gas at 30$$^oC$$ and 3 $$atm$$ pressure (gas constant $$R$$ $$=$$ 0.0821 $$L atm / \:mol / \: K$$)?

For a sample of an ideal gas of fixed weight and at a fixed temperature.
I. the volume varies, directly proportional with the pressure exerted on it.
II. the volume varies inversely proportional with the pressure exerted on it.
III. the pressure varies directly proportional  with the density f the gas. 
Choose the correct option :

Find the new volume of the gas, when kelvin temperature and pressure of a fixed amount of gas is doubled?

A sample of neon gas is contained by a closed 4-litre vessel. The temperature of container is 25 $$^oC$$ and pressure is 1.5  atmospheres. (The gas constant, $$R$$, is equal to 0.08 $$Latm/ \:mol/ \: K$$).
Neon gas in the vessel is replaced with an equal molar quantity of helium gas. Which of the following properties of the gas in the container will be changed?
I. Pressure
II. Temperature
III. Density

According to the Kinetic-Molecular Theory, the kinetic energy of the molecules increases when they are --------------

Which one is correct about  Gay-Lussac's law?

Which one proposes a relationship between the combining volumes of gases with respect to the reactants and gaseous products.

PV $$=$$ nRT is the equation for:

Statement 1: According to the Kinetic Moecular Theory, the particles of a gas are in random motion at absolute zero temperature.
Statement 2: The degree of random motion of gas molecules varies inversely with the temperature of the gas.