Chemistry help Ideal Gases

Question

Calculate the moles of gas that has a pressure of 0.32atm at 45L volume and 440K of temperature. Which value of R will you use and what unit. Justify your answer.

Answer 1

R=0.08206 ^L·atm/_mol·K

use this one because the pressure is given in atm and you don't have to change it

PV=nRT

n=?moles

P=pressure in atm

V=vol in L

T=temp in K

n=PV/RT

n=^(0.32*45)/_{(0.08206*440)}

n=0.39882 mol

n=0.40 mol