Question

A sample of unknown gas occupies a volume of 3.5x10 -2 m 3 . If the gas is at a temperature of 67°C and a pressure of 45000 Pa. How many moles of the gas are there?

Answer 1

PV= nRT

P=45000Pa

V=3.5×10^-2m²

R=0.0831

T=67°C

45000×3.5×10^-2=n×0.0831×67

157500×10^-2=n×5.5677

n= 157500×10^-2 / 5.5677

n= 28288×10^-2

n= 282.9 moles