Which chemical equation correctly represents the synthesis of calcium sulfite from calcium oxide and sulfur dioxide ?
CaSO3(s) → CaO(s) + SO2(g)
CaSO3(s) + O2(g) → CaO(s) + SO2(g)
CaO(s) + SO2(g) → CaSO3(s)
CaO(s) + SO2(g) → CaSO3(s) + O2(g)
