Answers

2016-04-08T18:32:39+05:30
 Limestone is essentially CaCO3; molar mass of CaCO3 = 100 g/mol 
10 gm of 100% pure would be 10 gm of CaCO3 
90% pure means you have only 9 gms of CaCO3 in the 10gm sample 
9 gms/100gm/mol = 0.09 moles of CaCO3 
When heated 1 mole of CaCO3 yields 1 moles of CO2 
0.09 moles of CO3 will yield 0.09 moles of CO2 
1 mole of CO2 = 22.4 liters 
22.4 liters/mol x 0.09 moles = 2.016 liters

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