DETERMINING MOLAR MASS OF VOLATILE LIQUIDS USING IDEAL GAS LAW IN CHEMISTRY LAB. EXAM QUESTIONS AND ANSWERS (VERIFIED AND UPDATED)

DETERMINING MOLAR MASS OF
VOLATILE LIQUIDS USING IDEAL GAS
LAW IN CHEMISTRY LAB. EXAM
QUESTIONS AND ANSWERS (VERIFIED
AND UPDATED)




What is the purpose of Experiment 9? - ANS To determine the molar mass of a volatile, non-
polar liquid by converting it to a gas and using the Ideal Gas Law.


What is the key equation used in the lab? - ANS PV = nRT


What is the modified equation used in this lab? - ANS PV = (g/M)RT


How is the equation solved for molar mass? - ANS M = (gRT) / (PV)


Why can the Ideal Gas Law be used in this lab? - ANS Because the substance is volatile and
non-polar, so it behaves close to an ideal gas.


Why are highly polar substances not used? - ANS Highly polar gases do not behave ideally
due to strong intermolecular forces.




@2026/2027 ALLRIGHTS RESERVED.