For Concentrations in mol/dm3 and titration calculations, which ratio reasoning answer best supports this Unit 4.3 objective: (chemistry only) (HT only) Rearrange concentration equations. (MS 3b)?

The correct option is 0.34 mol/dm3 - correct ratio reasoning for chemistry only. The calculated answer is 0.34 mol/dm3.

The correct option is 0.34 mol/dm3 - correct ratio reasoning for chemistry only. This uses Concentration in mol/dm3 because the objective is about (chemistry only) (HT only) Rearrange concentration equations. (MS 3b). This ratio reasoning variant asks students to separate chemistry only from similar Unit 4.3 calculation steps. The reasoning belongs to Concentrations in mol/dm3 and titration calculations within Using concentrations of solutions in mol/dm3 (chemistry only) (HT only), so it should not be confused with nearby quantitative ideas such as mass, moles, concentration, yield, atom economy, or gas volume unless those are named in the objective. Use the focus term chemistry only to keep the answer aligned with AQA GCSE Chemistry 8462 Unit 4.3. The other options are weaker because they either use the wrong formula, the wrong unit, a vague relationship, or the wrong quantitative context.