This question is about properties of materials - Edexcel - GCSE Chemistry Combined Science - Question 7 - 2016 - Paper 1

To find the surface area (SA) and volume (V) of the cube:

1. Calculate the Surface Area: The formula for the surface area of a cube is:

   $SA = 6a^2$ where $a$ is the length of one side. Since $a = 2 ext{ cm}$:

   $SA = 6(2 ext{ cm})^2 = 6 imes 4 ext{ cm}^2 = 24 ext{ cm}^2$

2. Calculate the Volume: The formula for the volume of a cube is:

   $V = a^3$ Thus,

   $V = (2 ext{ cm})^3 = 8 ext{ cm}^3$

3. Calculate the Surface Area to Volume Ratio: The surface area to volume ratio is calculated as:

   ext{Ratio} = rac{SA}{V} = rac{24 ext{ cm}^2}{8 ext{ cm}^3} = 3 ext{ cm}^{-1}