Question

A cylinder of argon gas contains 50.0 L or Ar at 18.4 atm and 'C. How many moles of argon are in the cylinder?

Answer 1

A cylinder of argon gas contains 50.0 L of  Ar  at 18.4 atm and 127 °C. How many moles of argon are in the cylinder?

Number moles of Argon : 28.03

Further explanation

Given

The volume of gas=50 L

P = 18.4 atm

T = 127+273=400 K

Required

moles of Argon

Solution

Use ideal gas Law :

$\tt n=\dfrac{PV}{RT}\\\\n=\dfrac{18.4\times 50}{0.08205\times 400}\\\\n=28.03$