How many moles are there in 8.25 x 1026 molecules of methane?

1370moles

Explanation:

Given parameters:

Number of molecules in methane  =  8.25 x 10²⁶molecules

Unknown:

Number of moles of methane  = ?

Solution:

A mole of any substance contains the Avogadro's number of particles which is 6.02 x 10²³molecules;

            6.02 x 10²³ molecules is contained in 1 mole of a substance

            8.25 x 10²⁶molecules  of methane will contain   = 1370moles

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.