Chapter 10, Problem 74RQ

To three significant figures, calculate the density in g L^-1 of the following gases at $\text{ STP:}\left(\text{a}\right)\text{Ne}\text{.}\left(\text{b}\right){\text{ O}}_{\text{2}}\text{,}\left(\text{c}\right){\text{CH}}_{\text{4}}\left(\text{methane}\right)\text{, }\left(\text{d}\right){\text{ CF}}_{\text{4}}\text{.}$