Chemistry: Balanced Equation
The balanced equation is 2Ca + O2 = 2CaO
72.5 g Ca*(1 mol Ca/40.078 g Ca)*(2 mol CaO/2 mol Ca)=1.81 mol CaO
65.0 g O2*(1 mol O2/32 g O2)*(2 mol CaO/1 mol O2)=4.0625 mol CaO
Ca is the limiting reactant and O2 is the excess reactant.
72.5 g Ca*(1 mol Ca/40.078 g Ca)*(1 mol O2/2 mol Ca)*(32 g O2/1 mol O2)=28.9 g O2 (Used)
65-28.9=36.1 g O2
36.1 grams of oxygen will be left over.
72.5 g Ca*(1 mol Ca/40.078 g Ca)*(2 mol CaO/2 mol Ca)=1.81 mol CaO
65.0 g O2*(1 mol O2/32 g O2)*(2 mol CaO/1 mol O2)=4.0625 mol CaO
Ca is the limiting reactant and O2 is the excess reactant.
72.5 g Ca*(1 mol Ca/40.078 g Ca)*(1 mol O2/2 mol Ca)*(32 g O2/1 mol O2)=28.9 g O2 (Used)
65-28.9=36.1 g O2
36.1 grams of oxygen will be left over.