Which of the following reactions represents an exothermic reaction? C 2S → CS 2, ΔH = 27,550 cal 2H 2O → 2H 2 O 2, ΔH = 58 kcal C (graphite) → C (diamond), ΔH = 0. 45 kcal NH 3(g) 12. 0 kcal → ½N 2(g) 3/2H 2(g) CH 4 2O 2 → CO 2 2H 2O 212,800 cal.

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answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este