Answer:
Explanation:
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In this case, when looking over the chemical formula of a compound formed when two elements interact, we need to realize about their location in the periodic table; thus, since lithium is a metal and oxygen a nonmetal, we infer lithium turns out the cation and oxygen the anion. Moreover, as the oxidation state of lithium is 1+ and that of oxygen is 2-, we can set up the chemical formula as follows:
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Answer:
Li₂S(aq) + SrI₂(aq) → 2 LiI(aq) + SrS(s)
Explanation:
Lithium sulfide and strontium iodide react through a double displacement reaction. In these reactions, the cation of one salt is exchanged with the cation of the other. The condition for a double displacement reaction to occur is that a precipitate is formed. Here, according to the solubility rules, strontium sulfide is insoluble, so this reaction is feasible. The chemical equation is:
Li₂S(aq) + SrI₂(aq) → 2 LiI(aq) + SrS(s)
Answer:
The answer is (3) 1676 kJ. The heats of reaction at 101.3 kPa and 298 K for reaction: 4Al(s) +3O2(g)= 2Al2O3(s) is -3351 kJ. So for one mole of aluminum oxide is 3351/2=1676 kJ.
