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When balanced, which equations would have the coefficient 3 in front of the first set of atoms? Check all that apply. A. AgBr + GaPO4 → Ag3PO4 +GaBr3 B. H2SO4 + B(OH)3 → B2(SO4)3 + H2O C. Fe + AgNO3 → Fe(NO3)2 + Ag D. C2H4O2 +O2 → CO2 +H2O