ta có nFe3O4= 185,6/ 232= 0,8( mol)
PTPU
Fe3O4+ 4CO---to---> 3Fe+ 4CO2 (1)
..0,8mol-> 3,2mol
theo gt nCO= 44,8/ 22,4= 2( mol)< 3,2mol---> CO hết, Fe3O4 dư
theo(1) ta có nFe= 3/4 nCO= 3/4x 2= 1,5( mol)
=> mFe= 1,5x 56= 84( g)
theo(1) ta có nCO2= nCO= 2( mol)
=> VCO2= 2x 22,4= 44,8( l)
b) PTPU
CO2+ Ca(OH)2---> CaCO3+ H2O (2)
theo(2) ta có nCaCO3= nCO2= 2(mol)
=> mCaCO3= 2x 100= 200( g)