C)The brown gas NO2and the colorless gas N2O4exists in equilibrium; N2O4 (g)
NO2 (g)
0.625mol of N2O4was introduced into a 5.00L vessel and was allowed to
decompose until it reached equilibrium with NO2. The concentration of
N2O4at equilibrium was 0.075M. Calculate Kc for the reaction

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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.  

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it