Gas mass (M_gas) versus dust mass (M_env) for all transitions of DCO⁺ (left panel), H₂CO (center panel), and c-C₃H₂ (right panel). This plot shows that the gas masses from DCO⁺ and c-C₃H₂ are consistent between transitions, while H₂CO shows a broader spread. In the center panel, the gas mass from H₂CO 3_2,2-2_2,1 is not shown to avoid a crowded plot, but follows a similar distribution to the other transitions shown in the panel.