braswellrl0528 braswellrl0528 23-05-2023 Chemistry contestada Select all of the equations which demonstrate the law of conservation of mass. A Mg + S → MgS2 B C + O2 → C2O C 4Cu + O2 → 2Cu2O D 2H2 + O2 → 2H2O E H2SO4 + Zn → 4ZnSO + H2
