A student is investigating the properties of a titanium dioxide catalyst. The catalyst consists of cubic nanoparticles, each with a side length of 15 nm15\text{ nm}15 nm.
What is the surface area-to-volume ratio of one of these catalyst particles, and how is a particle of this size classified?
4.0×108 m−14.0 \times 10^8\text{ m}^{-1}4.0×108 m−1 and Nanoparticle
4.0×105 m−14.0 \times 10^5\text{ m}^{-1}4.0×105 m−1 and Fine particle
6.7×107 m−16.7 \times 10^7\text{ m}^{-1}6.7×107 m−1 and Nanoparticle
2.5×10−9 m−12.5 \times 10^{-9}\text{ m}^{-1}2.5×10−9 m−1 and Nanoparticle
48 exam-style questions on OCR GCSE Chemistry Properties of materials. Each one has a worked solution and a mark scheme showing where the marks go.