Answer:
260 g
Step-by-step explanation:
Given:
- r = radius of the spherical sand = 50 micron =

- a = edge length of the cube = 1.0 m
- \rho = density of sand =

Let n be the number of such silicon dioxide that would give the desired mass of sand.
According to the question, the surface area of all the sand particles will be equal to the surface area of the cube.

Let the total mass of sand required be M.


Hence, the total mass of the sand required will be equal to the 260 g.