3 A 60.00 g sample of tetraethyl lead, a gasoline additive, is found to contain 38.43 g lead, 17.83 g carbon, and 3.74 g hydrogen. Find its empirical formula.

The empirical formula is PbC₈H₂₀

Explanation:

To determine the empyrical formula, we need to determine the % of each element:

(38.43g  / 60 g ). 100 = 64.05 % of Lead

(17.83 g / 60 g) . 100 = 29.72 % of Carbon

(3.74 g / 60 g) . 100 = 6.23 % of H

Now we divide by the atomic mass:

64.05 / 207.2 = 0.309

29.72 / 12 = 2.48

6.23 / 1 = 6.23

We pick the lowest value and we divide again, with this number

0.309 / 0.309 = 1 Pb

2.48 / 0.309 = 8 C

6.23 / 0.309 = 20 H

PbC₈H₂₀

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.  

the answer would be a