Sand consist mainly of silicon dioxide when sand is heated, Chemistry

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Sand consist mainly of silicon dioxide when sand is heated

Sand consist mainly of silicon dioxide. When sand is heated with an excess of coke (carbon), pure silicon and carbon monoxide are produces.

a. Write a balanced equation for the reaction

b. How many moles of silicon dioxide are required to form 12.72 g of silicon?

c. How many grams of carbon monoxide are formed when 44.99 g of silicon is produced?

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Chemistry: Sand consist mainly of silicon dioxide when sand is heated

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