Gas Density

Question 1

The oil from a eucalyptus leaves contains the volatile compound eucalyptol. At 190°C and 60.0 torr a sample of eucalyptol vapor had a density of 0.320 g/L. Calculate the molar mass of eucalyptol.

Answer 1

You are given the density there, pressure & temperature. You shall use the formula for ideal gas law.

PV = nrt

Question 2

PV = nrt

• *P** is for pressure.
• *V** is for volume.
• *n** is for mole.
• *r** is for rate.
• *t** is for temperature.

What’s next?

Answer 2

Convert the formula for density.

Since we know density = mass/volume, formula becomes

D=

PM

RT