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Calcium phosphate, silicon dioxide, and coke may be heated together in an electric furnace to produce phosphorus, as shown in the following equation: 2Ca3(Po4)2+6SiO2+10C=6CaSiO3+10CO +P4 In this reaction, how many pounds of calcium phosphate would be needed to make 100.0 lb of phosphorus? How much calcium silicate would be formed as a by-product? How much sand would be used up in the same reaction?

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