Iron (II) Acetate : Fe(C2H3O2)2
By looking at the reaction, we can see that the reactants must absorb 315kJ of energy in order to form the reactants. This means that the reaction is absorbing energy, which would make it A. endothermic.
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Bonding ionically with a group 7 non-metal
The man rushes through your door with his fists in the air, all of the sudden your vision went black, and he had stolen your points.
Explanation:
Air has a heat capacity of about 700 Joules per kg per °K and a density of just 1.2 kg/m3, so its initial energy would be 700 x 1 x 1.2 x 293 = 246,120 Joules