cjasmine72806 cjasmine72806 06-04-2020 Mathematics contestada Which equations are balanced? Select four options. -Mg3N2 + H2O → 3MgO + 2NH3 -C3H8 + 5O2 → 4H2O + 3CO2 -Zn + 2HCl → ZnCl2 + H2 -3Ca(OH)2 + 2H3PO4 → Ca3(PO4)2 + 6H2O -3H2SO4 + 2Fe → Fe2(SO4)3 + H2 -4Al + 3O2 → 2Al2O3