Which reaction is a double displacement reaction? A) 3Mg+Fe2​O3​→2Fe+3MgO B) 2KBr+Cl2​→2KCl+Br2​ C) 2H2​+O2​→2H2​O D) 3C

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Which Reaction Is A Double Displacement Reaction A 3mg Fe2 O3 2fe 3mgo B 2kbr Cl2 2kcl Br2 C 2h2 O2 2h2 O D 3c 1 (40.95 KiB) Viewed 34 times

Which reaction is a double displacement reaction? A) 3Mg+Fe2​O3​→2Fe+3MgO B) 2KBr+Cl2​→2KCl+Br2​ C) 2H2​+O2​→2H2​O D) 3Ca(OH)2​+Al2(SO4​)3→3CaSO4​+2Al2(OH)3​ - The law of conservation of mass states that A) atoms cannot be created or destroyed in a chemical reaction B) molecules cannot be created or destroyed in a chemical reaction C) compounds cannot be created or destroyed in a chemical reaction D) heat cannot be created or destroyed in a chemical reaction E) energy cannot be created or destroyed in a chemical reaction - A coefficient of 4 that is in front of CO2​ in a balanced chemical equation indicates that A) There are four atoms of each element present. B) There are four molecules of CO2​ present. C) There are four atoms of carbon and 6 atoms of oxygen present. D) All of the choices are correct.