Two samples contain cubic particles made from the same material. Within each sample, all the particles are identical and do not touch one another.
| Sample | Side length of each particle in nm\text{nm}nm | Total volume of all the particles in nm3\text{nm}^3nm3 |
|---|---|---|
| P | 4.0 | 8.0 × 1018 |
| Q | 12.0 | 1.6 × 1019 |
Calculate the percentage by which the total exposed surface area of sample P is greater than the total exposed surface area of sample Q.
104 exam-style questions on AQA GCSE Chemistry 2.4 Bulk and surface properties of matter including nanoparticles, covering 2.4.1 Sizes of particles and their properties and 2.4.2 Uses of nanoparticles. Each one has a worked solution and a mark scheme showing where the marks go.