Gases questions | form five Chemistry

A certain gas is composed of 21% by volume of oxygen, 1% of argon and 78% of nitrogen. Find the density in gdm^-3 at 20^oC and 98.65kNm^-2 pressure.

Describe five assumptions of kinetic theory of gases that are not obeyed by real gases.

Differentiate between diffusion and effusion for gases.

Uranium and fluorine form a gaseous compound , UF₆. It is proposed that ²³⁵U and ²³⁸U isotopes be separated by gaseous diffusion of the ²³⁵UF₆ and ²³⁵UF₆ compounds. Which gas would diffuse more rapidly, and by how much?

A general equation for the breakdown of glucose in a human body can be presented as follows:

C₆H₁₂O₆+6O₂→6CO₂+6H₂O.

If 856g of C₆H₁₂O₆ is consumed by a person over a certain period, what is the mass of CO₂ produced?

60cm³ of  a certain gas was collected at 60^oC and 1.05x10⁵ Nm^-2. Calculate the volume of the gas at stp.

When 0.5dm³ of O₂ and 1.0dm³ of CO₂ were mixed at 27^oC, the total pressure in the vessel was found to be 1.2 atm. Calculate;

1. partial pressure of each gas
2. the mass of each gas

Nitrogen and oxygen combine endothermically at elevetated temperature  according to the equation 2N_2(g)+O_2(g) 2NO_2(g). If the equilibrium constant for the reaction is 4.3x10^-3 at 3000^oC and 1 atm, calculate the composition of each in the equilibrium if 2 moles of each nitrogen and oxygen were heated.

When 20.85g of PCl₅ was heated in a sealed tube of 4dm³ volume , the pressure in the vessel was found to be 1.5atm. At this pressure it was found that PCl₅ dissociated to 80%. Calculate the partial pressure of each gas.

1. State the following laws:

1. Graham`s law of gas diffusion
2. Charles` law
3. Boyle`s law.

2. Identify two laws in (a) above and show how they can be combined to give a single gas equation.