The rate of  diffusion is inversely proportional to the ____________ of the molecular weight of a gas (M).

Ammonia  diffuses faster than hydrochloric acid .why ?

A sample of helium has a volume of 500 cm ³at 373 k.Calculate the temperature at which the volume will become 

   260 cm³ . Assume that the pressure is constant .

Force per unit area defines _________.

A sample of oxygen gas with a volume of 8.00 L at 127^oC and 775 mm Hg is heated until it expands to a volume of 20.00L.  Determine the final temperature of the oxygen gas, if the pressure remains constant. 

Lighter gases diffuse ___________ behaviour gases.

_________ explains the effect of temperature on the volume of a gas.

  If  P₁=3atm,V₁=2.0L,P₂ =0.5atm,V₂ = ?     (P₁=initial pressure of the gas ,P₂ =final pressure of the gas ,V₁ =initial volume of the gas,V₂= final volume of the gas ).

_____ is the device used to measure pressure .

Decrease in the volume of the same quantity of gas under pressure is known as  ___________ .