How many moles are in this gas sample? Please help if possible!

Question

A sample of gas was found to have a volume of 16.4L, a pressure of 1.7atm, and a temperature of 176K. How many moles is the gas sample?

Answer 1

Use the formula PV =nRT

therefore n = PV/RT

R constant value is 0.0821 atm.L/mol.K

n=1.7 × 16.4 / 0.0821 × 176

n = 1.929 mol