Answer
$123.5$ grams
Work Step by Step
The question also gives us the diameter of each wafer, $300mm$, and the density of the material, $2.33g/cm^3$. We are then asked to find the mass of each wafer. Mass = Density * Volume, so we must find the volume of each wafer. The wafers are in the shape of a cylinder so the volume of each wafer is $V=\pi r^2h$. The radius is half the diameter or $150mm$ which is equal to $15.0cm$. So the volume of each wafer is $53.014cm^3$. The mass of each wafer is then $123.5g$.
