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Question:

I have a chem quiz today, and the only problem im not able to solve is.Please help!?

How many kilograms of limestone should be added for every kilogram of iron ore processed in a blast furnace if the limestone is 93.20% pure and the iron ore contains 5.80% SiO2 by mass? (Note: SiO2(s) + CaCO3(s) → CaSiO3(s) + CO2(g))

Answer:

in 1 kg of iron ore there is .58 kg os SiO2 i e 10.3moles 1 mole requires 1 mole limestone 10.3 moles lime stone are required mass of limestone10.3*100g mass of limestone1.03Kg mass of impure limestone 1.03*100/93.2 mass of impure limestone1.105kg so you need 1.105 kg limestone per 1kg of iron ore

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