Final abundances of gaseous(^[g]; nitrous oxide (N₂O), methane (CH₄), hydrogen cyanide (HCN), nitric oxide (NO), and ammonia (NH₃)) and aqueous products (^[aq]; CN⁻, nitrite + nitrate, ${\mathrm{N}\mathrm{H}}_4^{+}$, and urea) in overnight experiments. Data points represent individual experiments with varying CO₂ fractions. Experiments without any H₂ and CO₂ are indicated by squares and not included in fits. Lines are best linear fits for dependency between CO₂ concentration and the final abundance of products. Measurements below the detection limit (arrows) are included as (Detection Limit / $\sqrt{2}$) in the fitting process. Shaded areas give 1σ-range. No fit is shown for methane since all measured values are within 1σ of 0 (red line), for nitrous oxide since there is no trend visible in the data, and for urea as most measurements for CO₂ > 1% below the detection limit. Abundances of HCN and NH₃ are calculated from measured aqueous abundances of CN⁻ and ${\mathrm{N}\mathrm{H}}_4^{+}$, respectively.