Question

Weight of CO2 prepared by heating 200Kg of Limestone which is 95% pure

Answer 1

heya shruti ,,,,

CaCO3------->CaO+Co2 
molecular wt. of CaCO3=40+12+16*3 
=100g 
molec.wt of CaO=40+16=56g 
amt of limestone available=95/100*200=190g 
when CaCO3 is 100g thenCaO is 56g 
when limestone is 190g then CaO is 56/100 *190=106.40g

hope that helps !!!