What Thickness (In Cm)is the Silicon Block (Density = 2

Multiple Choice

What thickness (in cm) is the silicon block (density = 2.33 g/cm³) that is 2.87 cm wide and long necessary to react with 91.3 g of Cr₂O₃ by the reaction: 3 Si (s) + 2 Cr₂O₃ (s) → 3 SiO₂ (s) + 4 Cr (l) ?

A) 2.05 cm
B) 1.32 cm
C) 3.08 cm
D) 8.98 cm
E) 3.79 cm