Much needed help! Please show steps in order to get the final answer.

Since density is units of mass per volume, you can use n/V as an indication of density.
PV = nRT
n = PV/RT
n/V = P/RT and with R a constant
n/V = P/T
1.96/x = 0.00366/0.00287
x = 1.54 g/L
NOTE: changed temps to Kelvin
PV = nRT
n = PV/RT
n/V = P/RT and with R a constant
n/V = P/T
1.96/x = 0.00366/0.00287
x = 1.54 g/L
NOTE: changed temps to Kelvin