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What Thickness (In Cm) Is the Silicon Block (Density =

Question 20

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

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