Calculate the molality (m) of an aqueous solution of HCl which is 36.71% HCl by mass and has a density of 1.076 g/mL.

15.9 mol/kg is the molality for the solution

Explanation:

36.71% means that 36.71 g of solute are contained in 100g of solution

36.71 g → mass of solute

100 g → mass of solution (mass of solute + mass of solvent)

Mass of solvent → 100 g - 36.71 g = 63.29 g

Molality → moles of solute in 1kg of solent

We convert the mass of solute to mol → 36.71 g . 1mol/36.45 g =1.007 mol

We convert the mass of solvent from g to kg → 63.29 g . 1kg/1000g = 0.06329 kg

1.007 mol /0.06329 kg → molality → 15.9 m

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.  

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