What is the boiling point (in C) of a 0.743 m aqueous solution of KCI?
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The boiling point (in C) of a 0.743 m  aqueous solution of KCI : 100.7608°C

Solutions from volatile substances have a higher boiling point and lower freezing points than the solvent  

ΔTb = Tb solution - Tb solvent  

ΔTb = boiling point elevation  

For electrolyte solutions there is a van't Hoff factor = i  

i = 1 + (n-1) α  

n = number of ions from the electrolyte  

α = degree of ionization, strong electrolyte α = 1, for non electrolytes i = 1  

KCl⇒K⁺+Cl⁻⇒ electrolyte  solution(2 ions K⁺ and Cl⁻),  strong electrolyte α = 1

ΔTb=Kb.m.i

i = 1 + (n-1) α  

i=1+(2-1).1=2

Kb for water (solvent) : 0.512 °C kg/mol

molal KCl = 0.743 m

The boiling point of solution :

1 is the answer to this problem