3.94 g of magnesium metal was used to produce hydrogen gas. Write the balanced chemical equation for this reaction. How many moles of hydrogen gas would be produced by the complete reaction of the
magnesium?

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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.  

catya that's not even a b or c