A cube of marble with sides of 3 cm is cut into 27 smaller cubes, each with sides of 1 cm.
How do the total surface area and the surface area to volume ratio of the marble change?
total surface area ×27\times27×27; surface area to volume ratio ×27\times27×27
total surface area ×9\times9×9; surface area to volume ratio ×3\times3×3
total surface area unchanged; surface area to volume ratio ×3\times3×3
total surface area ×3\times3×3; surface area to volume ratio ×3\times3×3
54 exam-style questions on Edexcel GCSE Chemistry 8.1 Rates of reaction, covering 8.1.1 Measuring and interpreting rates of reaction, 8.1.2 Collision theory and the factors affecting rate, and 8.1.3 Catalysts and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.