Platinum is used as a catalyst.
The same mass of platinum is made into cube-shaped particles, either with sides of length 20 nm or with sides of length 2 nm.
How many times greater is the total surface area of the 2 nm particles than the total surface area of the 20 nm particles?
1 (the same)
10
100
1000
60 exam-style questions on OCR GCSE Chemistry 2.3 Properties of materials, covering 2.3.1 Carbon bonding and the variety of organic compounds, 2.3.2 Diamond, graphite, fullerenes and graphene, 2.3.3 Bond strength, changes of state and predicting states, 2.3.4 Bulk properties and types of bonding, and 2.3.5 Nanoparticles: scale, surface area, uses and risks. Each one has a worked solution and a mark scheme showing where the marks go.