User: In a chemical reaction, an iron atom became the ion Fe2+. What happened to the iron atom? A. It lost electrons and was oxidized. B. It lost electrons and was reduced. C. It gained electrons and was oxidized. D. It gained electrons and was reduced.

Weegy: A. It lost electrons and was oxidized
Auto answered|Score 1|mythmoh|Points 5309|

User: In a compound, chemical energy is contained in the A. nuclei of the atoms. B. unbonded electrons. C. bonds. D. movement of the electrons.

Weegy: D. movement of the electrons.
Auto answered|Score 1|mandyplatinum|Points 31|

User: Which of the following statements is true about what happens during a chemical reaction? A. Bonds of the reactants are broken, and bonds of the products are formed. B. Bonds of the reactants are formed, and bonds of the products are broken. C. The bonds of both the reactants and the products are broken. D. The bonds of both the reactants and the products are formed.

Weegy: A. Bonds of the reactants are broken, and bonds of the products are formed.
Auto answered|Score 1|vanilla2bean|Points 791|

User: In terms of energy, how would you classify the following chemical reaction? 2Cu + O2 ? 2CuO + 315 kJ A. endothermic B. exothermic C. both endothermic and exothermic D. neither endothermic nor exothermic

Weegy: The correct answer is B. exothermic .
Auto answered|Score 1|Slayin|Points 743|

User: For the chemical reaction C2H6 + 137 kJ ? C2H4 + H2, the chemical energy of the A. reactant is greater than the chemical energy of the products. B. products is greater than the chemical energy of the reactant. C. reactant and the chemical energy of the products are equal. D. reaction is conserved.

Weegy: D. reaction is conserved.
Auto answered|Score .8114|TonioL|Points 110|

User: For the chemical reaction H2 + CO2 ? H2O + CO, the energy contained in the reactants is 352 kJ, and the energy contained in the products is 394 kJ, assuming 1 mol of each substance is present. Which of the following statements is true? A. 42 kJ is released, and the reaction is exothermic. B. 42 kJ is released, and the reaction is endothermic. C. 42 kJ is absorbed, and the reaction is exothermic. D. 42 kJ is absorbed, and the reaction is endothermic.

Weegy: For the chemical reaction H2 CO2- H20 Co the energy contained in the reactants is 352 kj and the energy contained in the products is 394 kj assuming [ 1 mol of each ... http://wiki.answers.com/Q/For_the_chemical_reaction_H2_CO2- H20_Co_the_energy_contained_in_the_reactants_is_352_kj_and_the_energy_contained_in_the_products_is_394_kj_assuming_1_mol_of_each_substance_is_present_is_this_true ]
Auto answered|Score .6

User: Reaction rates do NOT tell you how fast A. reactants are being consumed. B. products are being formed. C. substances are changing state. D. energy is being absorbed or released.

Weegy: The answer is D. energy is being absorbed or released.
Expert answered|alfred123|Points 246|