What Is the Density (In G/L) of Methane (CH₄) at 25°C

Multiple Choice

What is the density (in g/L) of methane (CH₄) at 25°C and 1.2 atm of pressure? The value of R = 0.0821 L atm mol^-1 K^-1.

A) 4.90 × 10^-2 g/L
B) 1.20 g/L
C) 0.787 g/L
D) 9.9 g/L
E) 6.21 × 10³ g/L