Which solution has the higher boiling point: 42.0 g c2h6o2 in 0.500 kg of h2o or 35.0 g nacl in 0.500 kg of h2o?

The NaCl solution will have higher boiling point.

Explanation:

C2H6O2 is a molecular substance. Meaning that when it dissolves it will remain this way:

                                  C2H6O2 > C6H12O6 (aq)  

Sodiumchloride (NaCl) is an ionic substance. Meaning that when it dissolves, it will create ions:

                                   NaCl(s)> Na+(aq) + Cl- (aq)

Conclusion:

NaCl is an ionic compound and C2H6O2 is a molecular compound. Ionic compounds have higher boiling points than molecular compounds. Therefore, NaCl will have the higher boiling point.

It’s either A or C sorry I can’t help more