Simple definitions of covalent bond, polar bond, hydrogen bond and ionic bond

Covalent Bond (Molecular Bond)- when atoms bond together by sharing electrons
Polar Bond-slightly ionic bonds
Hydrogen Bond- when a hydrogen atom is covalently bound to a highly electronegative atom (larger atom)
Ionic Bond- complete transfer of valence electrons between atoms
Hope this helps. I can simplify these down more if need be.

Answer is: he boiling point of a 1.5 m aqueous solution of fructose is 100.7725°C.
The boiling point elevation is directly proportional to the molality of the solution according to the equation: ΔTb = Kb · b.
ΔTb -  the boiling point elevation.
Kb - the ebullioscopic constant. of water.
b - molality of the solution.
Kb = 0.515°C/m.
b = 1.5 m.
ΔTb = 0.515°C/m · 1.5 m.
ΔTb = 0.7725°C.
Tb(solution) = Tb(water) + ΔTb.
 Tb(solution) = 100°C + 0.7725°C = 100.7725°C.