Textbook Problem

Silicon carbide, SIC, is one of the hardest materials known. Surpassed in hardness only by diamond, it is sometimes known commercially as carborundum. Silicon carbide is used primarily as an abrasive for sandpaper and is manufactured by heating common sand (silicon dioxide, ${\text{SiO}}_2$) with carbon in a turn ace.

:math> SiO 2 ( s ) + C ( s ) → CO ( g ) + SiC ( s )

at mass of silicon carbide should result when 1.0 kg of pure sand is heated with an excess of carbon?