Asample of ammonia has a mass of 43.5 g. how many molecules are in this sample?

Mass of ammonia sample is 43.5 g. The molecular formula of ammonia is . The molecular formula is 17.031 g/mol.

To calculate the number of molecules of ammonia, first calculate the number of moles as follows:

Here, m is mass and M is molar mass, putting the values,

Now, in mole there are molecules, this is known as Avogadro's number.

Since,

Thus,

Therefore, number of molecules in the sample will be

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.