September 2018 1 56 Report
Urgente por favor puede resolverme estos ecuaciones químicas por método de tanteo:

*NH3 +O2 -----> NO +H2O
*Fe2O3 + CO ---->Fe + CO2
*CuS+O2----> Cu2O +SO2
*CaCl2 + H2SO4 -------> CaSO4 + HCl

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