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When a 1.25-gram sample of limestone CaCO3 was dissolved in hydrochloric acid, 0.44 gram of CO2 was generated.?

janaki
in Homework Help

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If the rock contained no carbonate other than CaCO3, what was the percent of CaCO3 by mass in the limestone?

CaCO3 + 2HCl ----> CaCl2 + CO2 + H2O

Sure: 0.44 g of CO2 is how many moles of CO2? Then, what is the ratio of CaCO3 to CO2? And thus how many moles of CaCO3 do I have? How many grams?

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