Calculate the number of gasesous molecules left in a volume of `1 mm^(3)` if it is pumped out to give a vacuum of `10^(-6)mm Hg` at `298 K`.

Calculate the number of gaseous molecules left in a volume of 1 mm^(3) if it is pumped out to give a vacuum of 10^(-6)mm Hg at 298 K .

Estimate the number of molecules left in a volume of the size of a pinhead about 1 cubic mm when the air is pumped out to give a vaccuum of 10^(−6 ) m Hg at 25^oC .

Number of molecules: What is the number of molecules in a diatomic gas present in 1 L flask at 0^(@) C and under a pressure of 7.6xx10^(-19) mm Hg ? Strategy : Express the pressure in atmosphers and use Eq.(1.10) to calculate the number of moles. Using Avoagdro's constant,find the number of molecules.

Calculate the kinetic energy per unit volume of a gas at a pressure of 10mm of Hg . (Density of Hg=13.6xx10^(3)kgm^(-3) and g=9.8ms^(-2) )

Calculate the vapour pressure of an aqueous solution containing 5% by mass of urea (NH_2CON_2) at 298K. The vapour pressure of water at 298K is 23.75 mm Hg.

Hydrochloric acid is treated with a metal to produce hydrogen gas. Suppose a student carries out this reaction and collects a volume of 154.4xx10^(-3)dm^(3) of a gas at a pressure of 742 mm of Hg at a temperature of 298 K. What mass of hydrogon gas (in mg) did the student collect?