A quality-control technician finds an unlabelled bottle of reagent. The bottle came from one of four batches.
| Batch | Concentration of dissolved compound / mol dm−3\mathrm{mol\,dm^{-3}}moldm−3 |
|---|---|
| K | 0.042 |
| L | 0.25 |
| M | 4.0 |
| N | 6.0 |
The technician reacts all the dissolved compound in a 100 cm3 sample. The reaction produces one mole of gas for each mole of dissolved compound. The volume of gas collected at RTP is 0.60 dm3.
One mole of gas occupies 24 dm3 at RTP.
What batch did the bottle come from?
Batch M
Batch L
Batch K
Batch N
151 exam-style questions on Edexcel GCSE Chemistry 6.2 Quantitative analysis, covering 6.2.1 Concentration in mol dm⁻³ and titration calculations, 6.2.2 Percentage yield and why actual yield falls short, 6.2.3 Atom economy of a reaction, 6.2.4 Choosing a reaction pathway, and 6.2.5 Molar volume of gases and Avogadro's law. Each one has a worked solution and a mark scheme showing where the marks go.