Question

A sample of nitrogen gas was kept in a container with a volume of 4.5 L and at temperature of 36°C exerts a pressure of 5.2 atm. Calculate the number of moles present.

Answer 1

Using the formular PV=nRT

Where P is pressure , V is volume

R is molar gas constant, T is temperature in kelvin, n is number of moles

Making n subject of the formula

We have n=PV/RT

n=5.2×4.5/309×8.314

n=0.009moles