The tin plate is covered with tin, using 0.73 g of tin per 400 cm2 of the area of the tin.

The tin plate is covered with tin, using 0.73 g of tin per 400 cm2 of the area of the tin. What is the thickness of the tin layer?

Tin volume:

V = m / ρ, where V is the volume of tin spent on covering 400 cm2 of tin (V = S * h, where S is the area of the tin covering (S = 400 cm2), h is the thickness of the tin layer), m is the mass of tin spent ( m = 0.73 g), ρ is the density of tin (ρ = 7.3 g / cm³).

Let us express and calculate the thickness of the tin layer:

S * h = m / ρ.

h = m / (ρ * S) = 0.73 / (7.3 * 400) = 0.00025 cm = 0.0025 mm = 2.5 μm.

Answer: The thickness of the tin layer is 2.5 microns.