for the chemical reaction h2 + co2 → h2o + co, the energy contained in the reactants is 394 kj, and the energy contained in the products is 352 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 absorbed, and the reaction is exothermic. c. 42 kj is absorbed, and the reaction is endothermic. d. 42 kj is released, and the reaction is endothermic

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

An atom's configuration based on its number of electrons ends at 3p4. another atom has seven more electrons. starting at 3p, what is the remaining configuration? 3p63d34s2 3p43d54s2 3p64s23d3 3p44s23d

Someone do this for me. im really stuck