What is the density of Fluorine gas in grams/liters if it’s molar mass is 38.0 grams at STP

The density of Fluorine gas : 1.7 g/L

In general, the gas equation can be written  

where  

P = pressure, atm , N/m²

V = volume, liter  

n = number of moles  

R = gas constant = 0.082 l.atm / mol K (P= atm, v= liter),or 8,314 J/mol K (P=Pa or N/m2, v= m³)

T = temperature, Kelvin

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure), so :

P₁= 1 atm

T₁  = 273 K

M=molar mass= 38 g/mol